./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/mcmillan2006.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/mcmillan2006.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa --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 45cd9f1eda35cecb580d3b7fe5199506be9e5041f2297c1c3e22e0a862fa68be --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:22:32,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:22:32,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:22:32,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:22:32,027 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:22:32,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:22:32,029 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:22:32,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:22:32,032 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:22:32,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:22:32,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:22:32,035 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:22:32,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:22:32,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:22:32,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:22:32,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:22:32,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:22:32,040 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:22:32,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:22:32,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:22:32,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:22:32,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:22:32,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:22:32,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:22:32,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:22:32,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:22:32,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:22:32,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:22:32,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:22:32,053 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:22:32,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:22:32,053 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:22:32,054 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:22:32,055 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:22:32,055 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:22:32,056 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:22:32,056 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:22:32,056 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:22:32,056 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:22:32,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:22:32,057 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:22:32,058 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 23:22:32,084 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:22:32,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:22:32,085 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:22:32,085 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:22:32,085 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:22:32,085 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:22:32,086 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:22:32,086 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:22:32,086 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:22:32,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:22:32,086 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 23:22:32,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 23:22:32,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 23:22:32,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:22:32,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 23:22:32,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:22:32,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 23:22:32,087 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 23:22:32,087 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 23:22:32,087 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:22:32,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 23:22:32,088 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:22:32,088 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:22:32,088 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:22:32,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:22:32,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:22:32,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:22:32,089 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 23:22:32,089 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 23:22:32,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 23:22:32,089 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 23:22:32,089 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 23:22:32,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 23:22:32,089 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:22:32,089 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_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45cd9f1eda35cecb580d3b7fe5199506be9e5041f2297c1c3e22e0a862fa68be [2021-12-06 23:22:32,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:22:32,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:22:32,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:22:32,298 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:22:32,299 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:22:32,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/loop-lit/mcmillan2006.i [2021-12-06 23:22:32,343 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/data/8d11bddcb/19d29a62ef074d5ab8fc1de64955a03e/FLAG8c15ba870 [2021-12-06 23:22:32,699 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:22:32,699 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/sv-benchmarks/c/loop-lit/mcmillan2006.i [2021-12-06 23:22:32,703 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/data/8d11bddcb/19d29a62ef074d5ab8fc1de64955a03e/FLAG8c15ba870 [2021-12-06 23:22:32,712 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/data/8d11bddcb/19d29a62ef074d5ab8fc1de64955a03e [2021-12-06 23:22:32,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:22:32,715 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:22:32,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:22:32,716 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:22:32,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:22:32,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:22:32" (1/1) ... [2021-12-06 23:22:32,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@328ecb62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:22:32, skipping insertion in model container [2021-12-06 23:22:32,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:22:32" (1/1) ... [2021-12-06 23:22:32,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:22:32,737 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:22:32,841 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/sv-benchmarks/c/loop-lit/mcmillan2006.i[1009,1022] [2021-12-06 23:22:32,852 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:22:32,858 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:22:32,868 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/sv-benchmarks/c/loop-lit/mcmillan2006.i[1009,1022] [2021-12-06 23:22:32,871 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:22:32,881 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:22:32,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:22:32 WrapperNode [2021-12-06 23:22:32,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:22:32,883 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:22:32,883 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:22:32,883 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:22:32,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:22:32" (1/1) ... [2021-12-06 23:22:32,894 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:22:32" (1/1) ... [2021-12-06 23:22:32,907 INFO L137 Inliner]: procedures = 18, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2021-12-06 23:22:32,907 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:22:32,908 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:22:32,908 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:22:32,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:22:32,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:22:32" (1/1) ... [2021-12-06 23:22:32,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:22:32" (1/1) ... [2021-12-06 23:22:32,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:22:32" (1/1) ... [2021-12-06 23:22:32,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:22:32" (1/1) ... [2021-12-06 23:22:32,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:22:32" (1/1) ... [2021-12-06 23:22:32,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:22:32" (1/1) ... [2021-12-06 23:22:32,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:22:32" (1/1) ... [2021-12-06 23:22:32,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:22:32,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:22:32,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:22:32,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:22:32,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:22:32" (1/1) ... [2021-12-06 23:22:32,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:22:32,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:22:32,956 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:22:32,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:22:32,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:22:32,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 23:22:32,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 23:22:32,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 23:22:32,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:22:32,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:22:32,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 23:22:33,054 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:22:33,056 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:22:33,138 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:22:33,143 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:22:33,143 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 23:22:33,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:22:33 BoogieIcfgContainer [2021-12-06 23:22:33,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:22:33,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:22:33,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:22:33,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:22:33,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:22:32" (1/3) ... [2021-12-06 23:22:33,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f48b11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:22:33, skipping insertion in model container [2021-12-06 23:22:33,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:22:32" (2/3) ... [2021-12-06 23:22:33,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f48b11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:22:33, skipping insertion in model container [2021-12-06 23:22:33,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:22:33" (3/3) ... [2021-12-06 23:22:33,151 INFO L111 eAbstractionObserver]: Analyzing ICFG mcmillan2006.i [2021-12-06 23:22:33,156 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:22:33,156 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 23:22:33,194 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:22:33,200 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 [2021-12-06 23:22:33,201 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 23:22:33,211 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 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) [2021-12-06 23:22:33,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 23:22:33,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:33,217 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:33,218 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:33,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:33,223 INFO L85 PathProgramCache]: Analyzing trace with hash 186158361, now seen corresponding path program 1 times [2021-12-06 23:22:33,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:33,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549573746] [2021-12-06 23:22:33,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:33,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:33,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:33,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549573746] [2021-12-06 23:22:33,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549573746] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:22:33,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:22:33,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 23:22:33,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303347760] [2021-12-06 23:22:33,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:22:33,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 23:22:33,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:33,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 23:22:33,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 23:22:33,357 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 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) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:33,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:33,366 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2021-12-06 23:22:33,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 23:22:33,368 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 23:22:33,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:33,374 INFO L225 Difference]: With dead ends: 27 [2021-12-06 23:22:33,374 INFO L226 Difference]: Without dead ends: 12 [2021-12-06 23:22:33,376 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 [2021-12-06 23:22:33,379 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:33,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:22:33,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-06 23:22:33,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-12-06 23:22:33,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 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) [2021-12-06 23:22:33,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-12-06 23:22:33,401 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-12-06 23:22:33,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:33,402 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-12-06 23:22:33,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:33,402 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-12-06 23:22:33,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 23:22:33,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:33,402 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:33,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 23:22:33,403 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:33,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:33,403 INFO L85 PathProgramCache]: Analyzing trace with hash 180617235, now seen corresponding path program 1 times [2021-12-06 23:22:33,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:33,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445910091] [2021-12-06 23:22:33,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:33,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:33,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:33,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:33,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:33,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445910091] [2021-12-06 23:22:33,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445910091] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:22:33,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:22:33,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:22:33,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139636134] [2021-12-06 23:22:33,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:22:33,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:22:33,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:33,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:22:33,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:22:33,466 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:33,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:33,504 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-12-06 23:22:33,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:22:33,505 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 23:22:33,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:33,505 INFO L225 Difference]: With dead ends: 22 [2021-12-06 23:22:33,505 INFO L226 Difference]: Without dead ends: 14 [2021-12-06 23:22:33,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:22:33,507 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:33,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 30 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:22:33,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-12-06 23:22:33,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-12-06 23:22:33,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:33,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-12-06 23:22:33,510 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2021-12-06 23:22:33,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:33,510 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-12-06 23:22:33,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:33,511 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-12-06 23:22:33,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 23:22:33,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:33,511 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:33,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 23:22:33,511 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:33,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:33,512 INFO L85 PathProgramCache]: Analyzing trace with hash -875113359, now seen corresponding path program 1 times [2021-12-06 23:22:33,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:33,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504255558] [2021-12-06 23:22:33,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:33,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:33,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:33,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:33,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504255558] [2021-12-06 23:22:33,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504255558] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:22:33,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164782125] [2021-12-06 23:22:33,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:33,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:33,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:22:33,656 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:22:33,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 23:22:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:33,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 23:22:33,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:22:33,754 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 18 treesize of output 14 [2021-12-06 23:22:33,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:33,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:22:33,878 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 14 treesize of output 12 [2021-12-06 23:22:33,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-12-06 23:22:33,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:33,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164782125] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:22:33,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:22:33,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2021-12-06 23:22:33,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335217163] [2021-12-06 23:22:33,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:22:33,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 23:22:33,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:33,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 23:22:33,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:22:33,896 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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) [2021-12-06 23:22:33,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:33,953 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-12-06 23:22:33,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:22:33,953 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 23:22:33,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:33,954 INFO L225 Difference]: With dead ends: 21 [2021-12-06 23:22:33,954 INFO L226 Difference]: Without dead ends: 19 [2021-12-06 23:22:33,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:22:33,955 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:33,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 37 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:22:33,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-06 23:22:33,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2021-12-06 23:22:33,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:33,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-12-06 23:22:33,959 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-12-06 23:22:33,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:33,959 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-12-06 23:22:33,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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) [2021-12-06 23:22:33,960 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-12-06 23:22:33,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 23:22:33,960 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:33,960 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:33,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:22:34,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:34,162 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:34,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:34,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1418361721, now seen corresponding path program 1 times [2021-12-06 23:22:34,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:34,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648812863] [2021-12-06 23:22:34,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:34,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:34,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:34,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:34,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648812863] [2021-12-06 23:22:34,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648812863] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:22:34,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464694660] [2021-12-06 23:22:34,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:34,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:34,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:22:34,333 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:22:34,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 23:22:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:34,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:22:34,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:22:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:34,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:22:34,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:34,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464694660] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:22:34,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:22:34,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-06 23:22:34,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091806607] [2021-12-06 23:22:34,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:22:34,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 23:22:34,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:34,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 23:22:34,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:22:34,495 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:34,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:34,532 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-12-06 23:22:34,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:22:34,532 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 14 [2021-12-06 23:22:34,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:34,533 INFO L225 Difference]: With dead ends: 30 [2021-12-06 23:22:34,533 INFO L226 Difference]: Without dead ends: 18 [2021-12-06 23:22:34,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:22:34,534 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:34,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:22:34,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-06 23:22:34,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-12-06 23:22:34,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 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) [2021-12-06 23:22:34,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-12-06 23:22:34,538 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2021-12-06 23:22:34,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:34,538 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-12-06 23:22:34,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:34,538 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-12-06 23:22:34,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 23:22:34,539 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:34,539 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:34,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 23:22:34,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:34,741 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:34,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:34,743 INFO L85 PathProgramCache]: Analyzing trace with hash -324855195, now seen corresponding path program 2 times [2021-12-06 23:22:34,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:34,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522244915] [2021-12-06 23:22:34,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:34,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:34,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:34,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:34,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:34,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522244915] [2021-12-06 23:22:34,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522244915] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:22:34,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199068254] [2021-12-06 23:22:34,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:22:34,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:34,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:22:34,952 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:22:34,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 23:22:34,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:22:34,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:22:34,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 23:22:34,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:22:35,006 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 [2021-12-06 23:22:35,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:35,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:22:35,111 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 16 treesize of output 14 [2021-12-06 23:22:35,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 23:22:35,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:35,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199068254] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:22:35,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:22:35,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2021-12-06 23:22:35,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997266562] [2021-12-06 23:22:35,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:22:35,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 23:22:35,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:35,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 23:22:35,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:22:35,134 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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) [2021-12-06 23:22:35,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:35,204 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-12-06 23:22:35,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 23:22:35,204 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 16 [2021-12-06 23:22:35,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:35,205 INFO L225 Difference]: With dead ends: 27 [2021-12-06 23:22:35,205 INFO L226 Difference]: Without dead ends: 25 [2021-12-06 23:22:35,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:22:35,206 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 19 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:35,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 51 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:22:35,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-06 23:22:35,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2021-12-06 23:22:35,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 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) [2021-12-06 23:22:35,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-12-06 23:22:35,212 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2021-12-06 23:22:35,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:35,212 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-12-06 23:22:35,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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) [2021-12-06 23:22:35,213 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-12-06 23:22:35,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 23:22:35,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:35,213 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:35,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 23:22:35,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:35,416 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:35,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:35,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1610985595, now seen corresponding path program 3 times [2021-12-06 23:22:35,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:35,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148401635] [2021-12-06 23:22:35,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:35,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:35,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:35,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:35,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:35,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148401635] [2021-12-06 23:22:35,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148401635] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:22:35,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948642836] [2021-12-06 23:22:35,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:22:35,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:35,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:22:35,523 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:22:35,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 23:22:35,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 23:22:35,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:22:35,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 23:22:35,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:22:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:35,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:22:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:35,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948642836] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:22:35,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:22:35,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-06 23:22:35,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271596989] [2021-12-06 23:22:35,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:22:35,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 23:22:35,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:35,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 23:22:35,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:22:35,666 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-12-06 23:22:35,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:35,717 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-12-06 23:22:35,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:22:35,717 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-06 23:22:35,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:35,718 INFO L225 Difference]: With dead ends: 40 [2021-12-06 23:22:35,718 INFO L226 Difference]: Without dead ends: 24 [2021-12-06 23:22:35,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-12-06 23:22:35,719 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:35,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 62 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:22:35,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-06 23:22:35,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-12-06 23:22:35,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 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) [2021-12-06 23:22:35,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-12-06 23:22:35,723 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2021-12-06 23:22:35,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:35,723 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-12-06 23:22:35,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-12-06 23:22:35,723 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-12-06 23:22:35,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 23:22:35,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:35,724 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:35,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 23:22:35,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:35,926 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:35,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:35,927 INFO L85 PathProgramCache]: Analyzing trace with hash 731310041, now seen corresponding path program 4 times [2021-12-06 23:22:35,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:35,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020325690] [2021-12-06 23:22:35,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:35,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:36,083 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:36,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:36,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020325690] [2021-12-06 23:22:36,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020325690] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:22:36,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945138364] [2021-12-06 23:22:36,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:22:36,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:36,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:22:36,085 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:22:36,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 23:22:36,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:22:36,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:22:36,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 23:22:36,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:22:36,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 23:22:36,371 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 23:22:36,372 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 44 treesize of output 23 [2021-12-06 23:22:36,385 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:36,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:22:36,614 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 18 treesize of output 16 [2021-12-06 23:22:36,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 23:22:36,629 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:36,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945138364] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:22:36,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:22:36,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 27 [2021-12-06 23:22:36,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308206201] [2021-12-06 23:22:36,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:22:36,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 23:22:36,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:36,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 23:22:36,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-12-06 23:22:36,631 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2021-12-06 23:22:36,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:36,790 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2021-12-06 23:22:36,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 23:22:36,791 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) Word has length 22 [2021-12-06 23:22:36,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:36,791 INFO L225 Difference]: With dead ends: 41 [2021-12-06 23:22:36,791 INFO L226 Difference]: Without dead ends: 25 [2021-12-06 23:22:36,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 23:22:36,793 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:36,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 84 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 51 Unchecked, 0.0s Time] [2021-12-06 23:22:36,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-06 23:22:36,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-12-06 23:22:36,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 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) [2021-12-06 23:22:36,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-12-06 23:22:36,796 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2021-12-06 23:22:36,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:36,797 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-12-06 23:22:36,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2021-12-06 23:22:36,797 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-12-06 23:22:36,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 23:22:36,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:36,797 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:36,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 23:22:36,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:36,999 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:37,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:37,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1471659959, now seen corresponding path program 5 times [2021-12-06 23:22:37,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:37,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56977706] [2021-12-06 23:22:37,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:37,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:37,195 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:37,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:37,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56977706] [2021-12-06 23:22:37,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56977706] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:22:37,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103634319] [2021-12-06 23:22:37,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:22:37,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:37,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:22:37,196 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:22:37,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 23:22:37,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-06 23:22:37,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:22:37,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 23:22:37,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:22:37,245 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 [2021-12-06 23:22:37,285 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 23:22:37,286 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 27 treesize of output 26 [2021-12-06 23:22:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:37,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:22:37,417 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 16 treesize of output 14 [2021-12-06 23:22:37,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 23:22:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:37,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103634319] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:22:37,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:22:37,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 18 [2021-12-06 23:22:37,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558985673] [2021-12-06 23:22:37,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:22:37,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 23:22:37,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:37,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 23:22:37,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-12-06 23:22:37,435 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-12-06 23:22:37,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:37,539 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-12-06 23:22:37,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 23:22:37,540 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 24 [2021-12-06 23:22:37,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:37,540 INFO L225 Difference]: With dead ends: 49 [2021-12-06 23:22:37,540 INFO L226 Difference]: Without dead ends: 47 [2021-12-06 23:22:37,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-12-06 23:22:37,541 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:37,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 143 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 209 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2021-12-06 23:22:37,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-06 23:22:37,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2021-12-06 23:22:37,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:37,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-12-06 23:22:37,546 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 24 [2021-12-06 23:22:37,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:37,546 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-12-06 23:22:37,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-12-06 23:22:37,546 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-12-06 23:22:37,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 23:22:37,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:37,547 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:37,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 23:22:37,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 23:22:37,749 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:37,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:37,750 INFO L85 PathProgramCache]: Analyzing trace with hash -16639979, now seen corresponding path program 6 times [2021-12-06 23:22:37,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:37,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994370966] [2021-12-06 23:22:37,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:37,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:37,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:37,973 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:37,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:37,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994370966] [2021-12-06 23:22:37,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994370966] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:22:37,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090433764] [2021-12-06 23:22:37,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 23:22:37,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:37,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:22:37,974 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:22:37,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 23:22:38,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-06 23:22:38,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:22:38,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 23:22:38,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:22:38,035 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 [2021-12-06 23:22:38,067 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 23:22:38,067 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 25 treesize of output 24 [2021-12-06 23:22:38,094 INFO L354 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2021-12-06 23:22:38,094 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 25 treesize of output 30 [2021-12-06 23:22:38,196 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:38,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:22:40,292 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (< (+ |ULTIMATE.start_main_~i~0#1| 1) |c_ULTIMATE.start_main_~n~0#1|) (forall ((v_ArrVal_119 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_119) (+ 8 |c_ULTIMATE.start_main_~x~0#1.offset|)) 0)))) is different from false [2021-12-06 23:22:40,347 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 16 treesize of output 14 [2021-12-06 23:22:40,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 23:22:40,362 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-12-06 23:22:40,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090433764] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:22:40,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:22:40,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 24 [2021-12-06 23:22:40,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80236794] [2021-12-06 23:22:40,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:22:40,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 23:22:40,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:40,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 23:22:40,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=423, Unknown=1, NotChecked=42, Total=552 [2021-12-06 23:22:40,364 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-12-06 23:22:42,415 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (< (+ |ULTIMATE.start_main_~i~0#1| 1) |c_ULTIMATE.start_main_~n~0#1|) (forall ((v_ArrVal_119 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_119) (+ 8 |c_ULTIMATE.start_main_~x~0#1.offset|)) 0)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~x~0#1.offset|)) 0) (<= 3 |c_ULTIMATE.start_main_~i~0#1|) (< 3 |c_ULTIMATE.start_main_~n~0#1|)) is different from false [2021-12-06 23:22:42,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:42,486 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2021-12-06 23:22:42,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 23:22:42,487 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) Word has length 26 [2021-12-06 23:22:42,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:42,487 INFO L225 Difference]: With dead ends: 47 [2021-12-06 23:22:42,487 INFO L226 Difference]: Without dead ends: 45 [2021-12-06 23:22:42,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=149, Invalid=787, Unknown=2, NotChecked=118, Total=1056 [2021-12-06 23:22:42,488 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:42,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 85 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 168 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2021-12-06 23:22:42,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-06 23:22:42,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 29. [2021-12-06 23:22:42,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:42,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-12-06 23:22:42,492 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2021-12-06 23:22:42,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:42,493 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-12-06 23:22:42,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-12-06 23:22:42,493 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-12-06 23:22:42,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 23:22:42,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:42,493 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:42,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-06 23:22:42,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:42,694 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:42,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:42,694 INFO L85 PathProgramCache]: Analyzing trace with hash 985881805, now seen corresponding path program 7 times [2021-12-06 23:22:42,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:42,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913877070] [2021-12-06 23:22:42,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:42,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:42,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:42,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913877070] [2021-12-06 23:22:42,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913877070] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:22:42,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408784014] [2021-12-06 23:22:42,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 23:22:42,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:42,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:22:42,783 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:22:42,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 23:22:42,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:42,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 23:22:42,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:22:42,838 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 [2021-12-06 23:22:42,932 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:42,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:22:42,978 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 16 treesize of output 14 [2021-12-06 23:22:42,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 23:22:42,998 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:42,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408784014] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:22:42,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:22:42,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2021-12-06 23:22:42,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761735795] [2021-12-06 23:22:42,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:22:42,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 23:22:42,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:43,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 23:22:43,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-12-06 23:22:43,000 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 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) [2021-12-06 23:22:43,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:43,135 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-12-06 23:22:43,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 23:22:43,135 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 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 28 [2021-12-06 23:22:43,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:43,136 INFO L225 Difference]: With dead ends: 39 [2021-12-06 23:22:43,136 INFO L226 Difference]: Without dead ends: 37 [2021-12-06 23:22:43,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-12-06 23:22:43,137 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 25 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:43,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 124 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:22:43,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-06 23:22:43,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-12-06 23:22:43,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:43,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-12-06 23:22:43,143 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2021-12-06 23:22:43,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:43,144 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-12-06 23:22:43,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 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) [2021-12-06 23:22:43,144 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-12-06 23:22:43,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 23:22:43,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:43,145 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:43,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 23:22:43,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 23:22:43,347 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:43,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:43,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1173257955, now seen corresponding path program 8 times [2021-12-06 23:22:43,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:43,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925693913] [2021-12-06 23:22:43,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:43,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:43,447 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:43,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:43,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925693913] [2021-12-06 23:22:43,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925693913] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:22:43,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382659488] [2021-12-06 23:22:43,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:22:43,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:43,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:22:43,449 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:22:43,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 23:22:43,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:22:43,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:22:43,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 23:22:43,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:22:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:43,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:22:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:43,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382659488] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:22:43,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:22:43,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-06 23:22:43,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934708277] [2021-12-06 23:22:43,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:22:43,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 23:22:43,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:43,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 23:22:43,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-12-06 23:22:43,602 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:43,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:43,667 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-12-06 23:22:43,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 23:22:43,667 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-06 23:22:43,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:43,667 INFO L225 Difference]: With dead ends: 60 [2021-12-06 23:22:43,667 INFO L226 Difference]: Without dead ends: 36 [2021-12-06 23:22:43,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-12-06 23:22:43,668 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:43,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 86 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:22:43,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-06 23:22:43,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-12-06 23:22:43,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 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) [2021-12-06 23:22:43,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-12-06 23:22:43,673 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2021-12-06 23:22:43,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:43,673 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-12-06 23:22:43,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:43,673 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-12-06 23:22:43,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 23:22:43,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:43,674 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:43,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 23:22:43,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 23:22:43,876 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:43,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:43,877 INFO L85 PathProgramCache]: Analyzing trace with hash -92169919, now seen corresponding path program 9 times [2021-12-06 23:22:43,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:43,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434055702] [2021-12-06 23:22:43,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:43,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:44,022 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:44,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:44,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434055702] [2021-12-06 23:22:44,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434055702] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:22:44,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885695737] [2021-12-06 23:22:44,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:22:44,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:44,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:22:44,024 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:22:44,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 23:22:44,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-06 23:22:44,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:22:44,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 23:22:44,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:22:44,122 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 [2021-12-06 23:22:44,422 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 23:22:44,422 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 44 treesize of output 23 [2021-12-06 23:22:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:44,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:22:44,763 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 18 treesize of output 16 [2021-12-06 23:22:44,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 23:22:44,777 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:44,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885695737] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:22:44,778 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:22:44,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 37 [2021-12-06 23:22:44,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895575332] [2021-12-06 23:22:44,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:22:44,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 23:22:44,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:44,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 23:22:44,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 23:22:44,779 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 37 states, 37 states have (on average 2.324324324324324) internal successors, (86), 37 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) [2021-12-06 23:22:45,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:45,092 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2021-12-06 23:22:45,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 23:22:45,092 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.324324324324324) internal successors, (86), 37 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) Word has length 34 [2021-12-06 23:22:45,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:45,092 INFO L225 Difference]: With dead ends: 61 [2021-12-06 23:22:45,093 INFO L226 Difference]: Without dead ends: 37 [2021-12-06 23:22:45,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=389, Invalid=2803, Unknown=0, NotChecked=0, Total=3192 [2021-12-06 23:22:45,094 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 28 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:45,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 237 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 118 Invalid, 0 Unknown, 117 Unchecked, 0.0s Time] [2021-12-06 23:22:45,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-06 23:22:45,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-12-06 23:22:45,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:45,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-12-06 23:22:45,098 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2021-12-06 23:22:45,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:45,099 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-12-06 23:22:45,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.324324324324324) internal successors, (86), 37 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) [2021-12-06 23:22:45,099 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-12-06 23:22:45,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 23:22:45,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:45,099 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:45,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 23:22:45,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:45,302 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:45,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:45,303 INFO L85 PathProgramCache]: Analyzing trace with hash -692612065, now seen corresponding path program 10 times [2021-12-06 23:22:45,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:45,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207222548] [2021-12-06 23:22:45,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:45,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:45,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:45,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:45,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207222548] [2021-12-06 23:22:45,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207222548] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:22:45,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438344649] [2021-12-06 23:22:45,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:22:45,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:45,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:22:45,449 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:22:45,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 23:22:45,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:22:45,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:22:45,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 23:22:45,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:22:45,524 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 [2021-12-06 23:22:45,568 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 23:22:45,568 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 27 treesize of output 26 [2021-12-06 23:22:45,684 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:45,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:22:45,760 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 16 treesize of output 14 [2021-12-06 23:22:45,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 23:22:45,781 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:45,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438344649] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:22:45,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:22:45,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 24 [2021-12-06 23:22:45,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24016095] [2021-12-06 23:22:45,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:22:45,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 23:22:45,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:45,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 23:22:45,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-12-06 23:22:45,782 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2021-12-06 23:22:46,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:46,000 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2021-12-06 23:22:46,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 23:22:46,000 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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 36 [2021-12-06 23:22:46,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:46,001 INFO L225 Difference]: With dead ends: 69 [2021-12-06 23:22:46,001 INFO L226 Difference]: Without dead ends: 67 [2021-12-06 23:22:46,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-12-06 23:22:46,003 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:46,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 245 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 440 Invalid, 0 Unknown, 1 Unchecked, 0.1s Time] [2021-12-06 23:22:46,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-06 23:22:46,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 44. [2021-12-06 23:22:46,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:46,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-12-06 23:22:46,010 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 36 [2021-12-06 23:22:46,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:46,011 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-12-06 23:22:46,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2021-12-06 23:22:46,011 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-12-06 23:22:46,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-06 23:22:46,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:46,012 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:46,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 23:22:46,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 23:22:46,213 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:46,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:46,214 INFO L85 PathProgramCache]: Analyzing trace with hash 2103070589, now seen corresponding path program 11 times [2021-12-06 23:22:46,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:46,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797615528] [2021-12-06 23:22:46,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:46,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:46,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:46,381 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:46,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:46,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797615528] [2021-12-06 23:22:46,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797615528] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:22:46,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145950077] [2021-12-06 23:22:46,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:22:46,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:46,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:22:46,383 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:22:46,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 23:22:46,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-06 23:22:46,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:22:46,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 23:22:46,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:22:46,463 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 [2021-12-06 23:22:46,487 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 23:22:46,487 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 25 treesize of output 24 [2021-12-06 23:22:46,514 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 23:22:46,514 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 25 treesize of output 24 [2021-12-06 23:22:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 1 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:46,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:22:46,734 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 16 treesize of output 14 [2021-12-06 23:22:46,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 23:22:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:22:46,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145950077] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:22:46,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:22:46,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2021-12-06 23:22:46,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828418857] [2021-12-06 23:22:46,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:22:46,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 23:22:46,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:46,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 23:22:46,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-12-06 23:22:46,759 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 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) [2021-12-06 23:22:46,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:46,995 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2021-12-06 23:22:46,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 23:22:46,995 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 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 38 [2021-12-06 23:22:46,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:46,995 INFO L225 Difference]: With dead ends: 67 [2021-12-06 23:22:46,995 INFO L226 Difference]: Without dead ends: 65 [2021-12-06 23:22:46,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 61 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 23:22:46,996 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 85 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:46,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 149 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:22:46,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-06 23:22:47,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 41. [2021-12-06 23:22:47,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 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) [2021-12-06 23:22:47,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-12-06 23:22:47,002 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2021-12-06 23:22:47,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:47,002 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-12-06 23:22:47,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 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) [2021-12-06 23:22:47,002 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-12-06 23:22:47,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 23:22:47,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:47,002 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:47,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 23:22:47,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:47,204 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:47,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:47,205 INFO L85 PathProgramCache]: Analyzing trace with hash -747455179, now seen corresponding path program 12 times [2021-12-06 23:22:47,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:47,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246540400] [2021-12-06 23:22:47,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:47,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:47,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:47,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246540400] [2021-12-06 23:22:47,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246540400] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:22:47,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461980031] [2021-12-06 23:22:47,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 23:22:47,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:47,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:22:47,367 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:22:47,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 23:22:47,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-06 23:22:47,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:22:47,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 23:22:47,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:22:47,479 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 [2021-12-06 23:22:47,795 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 23:22:47,795 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 44 treesize of output 23 [2021-12-06 23:22:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 45 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:47,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:22:48,187 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 18 treesize of output 16 [2021-12-06 23:22:48,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 23:22:48,201 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 40 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:48,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461980031] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:22:48,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:22:48,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 42 [2021-12-06 23:22:48,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936396878] [2021-12-06 23:22:48,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:22:48,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 23:22:48,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:48,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 23:22:48,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1508, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 23:22:48,203 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 42 states, 42 states have (on average 2.4285714285714284) internal successors, (102), 42 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:48,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:48,533 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2021-12-06 23:22:48,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 23:22:48,533 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4285714285714284) internal successors, (102), 42 states have internal predecessors, (102), 0 states have call successors, (0), 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 40 [2021-12-06 23:22:48,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:48,533 INFO L225 Difference]: With dead ends: 71 [2021-12-06 23:22:48,533 INFO L226 Difference]: Without dead ends: 43 [2021-12-06 23:22:48,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=419, Invalid=3241, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 23:22:48,535 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 28 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:48,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 260 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 128 Invalid, 0 Unknown, 77 Unchecked, 0.0s Time] [2021-12-06 23:22:48,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-06 23:22:48,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-06 23:22:48,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 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) [2021-12-06 23:22:48,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-12-06 23:22:48,542 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2021-12-06 23:22:48,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:48,542 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-12-06 23:22:48,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.4285714285714284) internal successors, (102), 42 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:48,543 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-12-06 23:22:48,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 23:22:48,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:48,543 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:48,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 23:22:48,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 23:22:48,745 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:48,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:48,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1452500589, now seen corresponding path program 13 times [2021-12-06 23:22:48,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:48,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333681111] [2021-12-06 23:22:48,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:48,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:48,923 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:48,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:48,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333681111] [2021-12-06 23:22:48,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333681111] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:22:48,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736969359] [2021-12-06 23:22:48,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 23:22:48,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:48,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:22:48,924 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:22:48,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 23:22:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:48,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 23:22:48,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:22:48,996 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 [2021-12-06 23:22:49,037 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 23:22:49,038 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 27 treesize of output 26 [2021-12-06 23:22:49,171 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:49,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:22:49,256 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 16 treesize of output 14 [2021-12-06 23:22:49,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 23:22:49,283 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:49,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736969359] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:22:49,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:22:49,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 27 [2021-12-06 23:22:49,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659386564] [2021-12-06 23:22:49,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:22:49,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 23:22:49,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:49,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 23:22:49,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-12-06 23:22:49,284 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 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) [2021-12-06 23:22:49,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:49,504 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2021-12-06 23:22:49,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 23:22:49,504 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 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 42 [2021-12-06 23:22:49,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:49,505 INFO L225 Difference]: With dead ends: 79 [2021-12-06 23:22:49,505 INFO L226 Difference]: Without dead ends: 77 [2021-12-06 23:22:49,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 69 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 23:22:49,506 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:49,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 319 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 476 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2021-12-06 23:22:49,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-06 23:22:49,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 50. [2021-12-06 23:22:49,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:49,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2021-12-06 23:22:49,515 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 42 [2021-12-06 23:22:49,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:49,515 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2021-12-06 23:22:49,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 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) [2021-12-06 23:22:49,516 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2021-12-06 23:22:49,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 23:22:49,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:49,516 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:49,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 23:22:49,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 23:22:49,718 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:49,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:49,719 INFO L85 PathProgramCache]: Analyzing trace with hash -396306831, now seen corresponding path program 14 times [2021-12-06 23:22:49,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:49,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162412535] [2021-12-06 23:22:49,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:49,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:49,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:49,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162412535] [2021-12-06 23:22:49,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162412535] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:22:49,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655639662] [2021-12-06 23:22:49,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:22:49,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:49,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:22:49,919 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:22:49,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 23:22:49,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:22:49,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:22:49,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 23:22:49,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:22:49,986 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 [2021-12-06 23:22:50,007 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 23:22:50,008 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 25 treesize of output 24 [2021-12-06 23:22:50,031 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 23:22:50,032 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 25 treesize of output 24 [2021-12-06 23:22:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 1 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:50,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:22:50,301 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 16 treesize of output 14 [2021-12-06 23:22:50,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 23:22:50,332 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:22:50,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655639662] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:22:50,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:22:50,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 28 [2021-12-06 23:22:50,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455230806] [2021-12-06 23:22:50,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:22:50,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 23:22:50,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:50,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 23:22:50,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-12-06 23:22:50,334 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 28 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:50,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:50,650 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2021-12-06 23:22:50,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 23:22:50,650 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 28 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-06 23:22:50,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:50,651 INFO L225 Difference]: With dead ends: 77 [2021-12-06 23:22:50,651 INFO L226 Difference]: Without dead ends: 75 [2021-12-06 23:22:50,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=226, Invalid=1496, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 23:22:50,652 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 74 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:50,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 236 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:22:50,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-06 23:22:50,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 47. [2021-12-06 23:22:50,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 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) [2021-12-06 23:22:50,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-12-06 23:22:50,660 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2021-12-06 23:22:50,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:50,660 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-12-06 23:22:50,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 28 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:50,660 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-12-06 23:22:50,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 23:22:50,661 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:50,661 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:50,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 23:22:50,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 23:22:50,862 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:50,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:50,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1870665559, now seen corresponding path program 15 times [2021-12-06 23:22:50,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:50,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334285028] [2021-12-06 23:22:50,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:50,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:51,046 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:51,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:51,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334285028] [2021-12-06 23:22:51,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334285028] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:22:51,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768544050] [2021-12-06 23:22:51,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:22:51,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:51,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:22:51,047 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:22:51,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 23:22:51,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-06 23:22:51,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:22:51,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 23:22:51,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:22:51,188 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 [2021-12-06 23:22:51,574 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 23:22:51,575 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 44 treesize of output 23 [2021-12-06 23:22:51,590 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:51,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:22:52,042 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 18 treesize of output 16 [2021-12-06 23:22:52,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 23:22:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 60 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:52,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768544050] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:22:52,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:22:52,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 47 [2021-12-06 23:22:52,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78571722] [2021-12-06 23:22:52,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:22:52,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-06 23:22:52,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:52,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-06 23:22:52,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1901, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 23:22:52,062 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 47 states, 47 states have (on average 2.5106382978723403) internal successors, (118), 47 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:52,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:52,620 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2021-12-06 23:22:52,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 23:22:52,620 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.5106382978723403) internal successors, (118), 47 states have internal predecessors, (118), 0 states have call successors, (0), 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 46 [2021-12-06 23:22:52,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:52,621 INFO L225 Difference]: With dead ends: 81 [2021-12-06 23:22:52,621 INFO L226 Difference]: Without dead ends: 49 [2021-12-06 23:22:52,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1085 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=631, Invalid=5069, Unknown=0, NotChecked=0, Total=5700 [2021-12-06 23:22:52,623 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:52,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 284 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 135 Unchecked, 0.0s Time] [2021-12-06 23:22:52,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-06 23:22:52,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-12-06 23:22:52,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 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) [2021-12-06 23:22:52,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-12-06 23:22:52,629 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2021-12-06 23:22:52,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:52,629 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-12-06 23:22:52,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.5106382978723403) internal successors, (118), 47 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:52,629 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-12-06 23:22:52,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-06 23:22:52,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:52,629 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:52,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-06 23:22:52,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 23:22:52,830 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:52,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:52,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1892776313, now seen corresponding path program 16 times [2021-12-06 23:22:52,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:52,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040701314] [2021-12-06 23:22:52,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:52,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:53,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:53,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040701314] [2021-12-06 23:22:53,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040701314] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:22:53,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905698822] [2021-12-06 23:22:53,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:22:53,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:53,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:22:53,020 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:22:53,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 23:22:53,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:22:53,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:22:53,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 23:22:53,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:22:53,115 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 [2021-12-06 23:22:53,156 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 23:22:53,156 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 27 treesize of output 26 [2021-12-06 23:22:53,310 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:53,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:22:53,406 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 16 treesize of output 14 [2021-12-06 23:22:53,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 23:22:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:53,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905698822] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:22:53,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:22:53,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 30 [2021-12-06 23:22:53,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639188442] [2021-12-06 23:22:53,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:22:53,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 23:22:53,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:53,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 23:22:53,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2021-12-06 23:22:53,435 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 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) [2021-12-06 23:22:53,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:53,690 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2021-12-06 23:22:53,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 23:22:53,690 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 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) Word has length 48 [2021-12-06 23:22:53,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:53,691 INFO L225 Difference]: With dead ends: 89 [2021-12-06 23:22:53,691 INFO L226 Difference]: Without dead ends: 87 [2021-12-06 23:22:53,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 80 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=1411, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 23:22:53,692 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:53,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 431 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 701 Invalid, 0 Unknown, 20 Unchecked, 0.2s Time] [2021-12-06 23:22:53,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-06 23:22:53,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 56. [2021-12-06 23:22:53,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:53,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-12-06 23:22:53,698 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 48 [2021-12-06 23:22:53,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:53,699 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-12-06 23:22:53,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 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) [2021-12-06 23:22:53,699 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-12-06 23:22:53,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-06 23:22:53,699 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:53,699 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:53,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-06 23:22:53,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:53,901 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:53,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:53,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1666374427, now seen corresponding path program 17 times [2021-12-06 23:22:53,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:53,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490501209] [2021-12-06 23:22:53,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:53,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:54,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:54,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490501209] [2021-12-06 23:22:54,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490501209] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:22:54,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173655684] [2021-12-06 23:22:54,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:22:54,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:54,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:22:54,120 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:22:54,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 23:22:54,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-06 23:22:54,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:22:54,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 23:22:54,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:22:54,228 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 [2021-12-06 23:22:54,254 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 23:22:54,255 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 25 treesize of output 24 [2021-12-06 23:22:54,277 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 23:22:54,277 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 25 treesize of output 24 [2021-12-06 23:22:54,430 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 1 proven. 152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:54,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:22:54,556 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 16 treesize of output 14 [2021-12-06 23:22:54,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 23:22:54,586 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:22:54,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173655684] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:22:54,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:22:54,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 31 [2021-12-06 23:22:54,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000692746] [2021-12-06 23:22:54,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:22:54,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 23:22:54,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:54,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 23:22:54,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-12-06 23:22:54,588 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:54,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:54,903 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2021-12-06 23:22:54,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 23:22:54,903 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-12-06 23:22:54,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:54,904 INFO L225 Difference]: With dead ends: 87 [2021-12-06 23:22:54,904 INFO L226 Difference]: Without dead ends: 85 [2021-12-06 23:22:54,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 83 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=1907, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 23:22:54,905 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 59 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:54,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 285 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:22:54,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-06 23:22:54,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 53. [2021-12-06 23:22:54,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 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) [2021-12-06 23:22:54,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-12-06 23:22:54,912 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2021-12-06 23:22:54,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:54,912 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-12-06 23:22:54,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:54,912 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-12-06 23:22:54,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 23:22:54,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:54,913 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:54,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 23:22:55,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-12-06 23:22:55,114 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:55,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:55,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1193657443, now seen corresponding path program 18 times [2021-12-06 23:22:55,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:55,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775616224] [2021-12-06 23:22:55,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:55,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:55,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:55,303 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:55,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:55,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775616224] [2021-12-06 23:22:55,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775616224] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:22:55,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301617485] [2021-12-06 23:22:55,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 23:22:55,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:55,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:22:55,305 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:22:55,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 23:22:55,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-06 23:22:55,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:22:55,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 23:22:55,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:22:55,476 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 [2021-12-06 23:22:55,936 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 23:22:55,936 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 44 treesize of output 23 [2021-12-06 23:22:55,954 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 91 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:55,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:22:56,772 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 18 treesize of output 16 [2021-12-06 23:22:56,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 23:22:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 84 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:56,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301617485] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:22:56,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:22:56,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 52 [2021-12-06 23:22:56,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324820484] [2021-12-06 23:22:56,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:22:56,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 23:22:56,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:56,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 23:22:56,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2338, Unknown=1, NotChecked=0, Total=2652 [2021-12-06 23:22:56,793 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 52 states, 52 states have (on average 2.576923076923077) internal successors, (134), 52 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:57,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:57,461 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2021-12-06 23:22:57,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 23:22:57,461 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.576923076923077) internal successors, (134), 52 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-06 23:22:57,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:57,462 INFO L225 Difference]: With dead ends: 91 [2021-12-06 23:22:57,462 INFO L226 Difference]: Without dead ends: 55 [2021-12-06 23:22:57,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=737, Invalid=6234, Unknown=1, NotChecked=0, Total=6972 [2021-12-06 23:22:57,464 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 41 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:57,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 328 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 219 Invalid, 0 Unknown, 137 Unchecked, 0.1s Time] [2021-12-06 23:22:57,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-06 23:22:57,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-12-06 23:22:57,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 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) [2021-12-06 23:22:57,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2021-12-06 23:22:57,471 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2021-12-06 23:22:57,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:57,471 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2021-12-06 23:22:57,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.576923076923077) internal successors, (134), 52 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:57,472 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2021-12-06 23:22:57,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 23:22:57,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:57,472 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:57,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 23:22:57,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:57,673 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:57,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:57,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1895400709, now seen corresponding path program 19 times [2021-12-06 23:22:57,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:57,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673629316] [2021-12-06 23:22:57,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:57,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:57,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:57,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:57,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673629316] [2021-12-06 23:22:57,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673629316] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:22:57,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547420008] [2021-12-06 23:22:57,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 23:22:57,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:57,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:22:57,885 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:22:57,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 23:22:57,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:57,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 23:22:57,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:22:57,967 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 [2021-12-06 23:22:58,009 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 23:22:58,009 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 27 treesize of output 26 [2021-12-06 23:22:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:58,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:22:58,300 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 16 treesize of output 14 [2021-12-06 23:22:58,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 23:22:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:58,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547420008] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:22:58,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:22:58,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 33 [2021-12-06 23:22:58,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470526779] [2021-12-06 23:22:58,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:22:58,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 23:22:58,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:22:58,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 23:22:58,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 23:22:58,337 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 33 states, 33 states have (on average 2.757575757575758) internal successors, (91), 33 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:58,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:22:58,675 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2021-12-06 23:22:58,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 23:22:58,675 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.757575757575758) internal successors, (91), 33 states have internal predecessors, (91), 0 states have call successors, (0), 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 54 [2021-12-06 23:22:58,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:22:58,676 INFO L225 Difference]: With dead ends: 99 [2021-12-06 23:22:58,676 INFO L226 Difference]: Without dead ends: 97 [2021-12-06 23:22:58,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 91 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=1728, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 23:22:58,677 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:22:58,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 496 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 915 Invalid, 0 Unknown, 1 Unchecked, 0.2s Time] [2021-12-06 23:22:58,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-06 23:22:58,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 62. [2021-12-06 23:22:58,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:58,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2021-12-06 23:22:58,685 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 54 [2021-12-06 23:22:58,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:22:58,685 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2021-12-06 23:22:58,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.757575757575758) internal successors, (91), 33 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:22:58,685 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2021-12-06 23:22:58,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 23:22:58,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:22:58,686 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:22:58,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 23:22:58,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:58,887 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:22:58,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:22:58,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1960813863, now seen corresponding path program 20 times [2021-12-06 23:22:58,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:22:58,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831955234] [2021-12-06 23:22:58,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:22:58,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:22:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:22:59,123 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:22:59,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:22:59,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831955234] [2021-12-06 23:22:59,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831955234] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:22:59,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942777091] [2021-12-06 23:22:59,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:22:59,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:22:59,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:22:59,124 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:22:59,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 23:22:59,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:22:59,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:22:59,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-06 23:22:59,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:22:59,204 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 [2021-12-06 23:22:59,229 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 23:22:59,230 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 25 treesize of output 24 [2021-12-06 23:22:59,289 INFO L354 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2021-12-06 23:22:59,289 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 36 treesize of output 38 [2021-12-06 23:23:00,125 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 1 proven. 197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:00,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:23:00,774 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_239| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_239| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (and (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_239| 4) |c_ULTIMATE.start_main_~x~0#1.offset|) 0) (+ 28 |c_ULTIMATE.start_main_~x~0#1.offset|)) 0) (< 6 |v_ULTIMATE.start_main_~i~0#1_239|)))) is different from false [2021-12-06 23:23:00,779 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 27 treesize of output 25 [2021-12-06 23:23:00,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2021-12-06 23:23:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-12-06 23:23:00,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942777091] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:23:00,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:23:00,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 39 [2021-12-06 23:23:00,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386116543] [2021-12-06 23:23:00,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:23:00,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 23:23:00,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:23:00,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 23:23:00,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1280, Unknown=2, NotChecked=72, Total=1482 [2021-12-06 23:23:00,836 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 39 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:01,397 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_239| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_239| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (and (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_239| 4) |c_ULTIMATE.start_main_~x~0#1.offset|) 0) (+ 28 |c_ULTIMATE.start_main_~x~0#1.offset|)) 0) (< 6 |v_ULTIMATE.start_main_~i~0#1_239|)))) (<= 7 |c_ULTIMATE.start_main_~i~0#1|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~x~0#1.offset|)) 0) (<= |c_ULTIMATE.start_main_~i~0#1| 7)) is different from false [2021-12-06 23:23:01,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:23:01,435 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2021-12-06 23:23:01,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 23:23:01,435 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 39 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-06 23:23:01,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:23:01,436 INFO L225 Difference]: With dead ends: 97 [2021-12-06 23:23:01,436 INFO L226 Difference]: Without dead ends: 95 [2021-12-06 23:23:01,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 91 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=130, Invalid=1281, Unknown=3, NotChecked=146, Total=1560 [2021-12-06 23:23:01,437 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 35 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:23:01,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 494 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 400 Invalid, 0 Unknown, 89 Unchecked, 0.1s Time] [2021-12-06 23:23:01,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-06 23:23:01,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 59. [2021-12-06 23:23:01,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 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) [2021-12-06 23:23:01,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-12-06 23:23:01,446 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2021-12-06 23:23:01,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:23:01,446 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-12-06 23:23:01,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 39 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:01,446 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-12-06 23:23:01,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 23:23:01,447 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:23:01,447 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:23:01,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 23:23:01,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-06 23:23:01,648 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:23:01,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:23:01,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1778046481, now seen corresponding path program 21 times [2021-12-06 23:23:01,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:23:01,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811901282] [2021-12-06 23:23:01,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:01,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:23:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:01,891 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:01,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:23:01,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811901282] [2021-12-06 23:23:01,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811901282] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:23:01,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310084081] [2021-12-06 23:23:01,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:23:01,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:23:01,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:23:01,893 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:23:01,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 23:23:01,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-06 23:23:01,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:23:01,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 23:23:01,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:23:02,107 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 [2021-12-06 23:23:02,640 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 23:23:02,640 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 44 treesize of output 23 [2021-12-06 23:23:02,660 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 120 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:02,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:23:03,280 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 18 treesize of output 16 [2021-12-06 23:23:03,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 23:23:03,298 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 112 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:03,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310084081] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:23:03,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:23:03,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 57 [2021-12-06 23:23:03,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145488422] [2021-12-06 23:23:03,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:23:03,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-06 23:23:03,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:23:03,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-06 23:23:03,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=2822, Unknown=0, NotChecked=0, Total=3192 [2021-12-06 23:23:03,301 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 57 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:04,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:23:04,078 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2021-12-06 23:23:04,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 23:23:04,079 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 57 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-06 23:23:04,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:23:04,079 INFO L225 Difference]: With dead ends: 101 [2021-12-06 23:23:04,079 INFO L226 Difference]: Without dead ends: 61 [2021-12-06 23:23:04,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1603 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=875, Invalid=7681, Unknown=0, NotChecked=0, Total=8556 [2021-12-06 23:23:04,082 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 26 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:23:04,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 396 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 259 Invalid, 0 Unknown, 151 Unchecked, 0.1s Time] [2021-12-06 23:23:04,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-06 23:23:04,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-12-06 23:23:04,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:04,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-12-06 23:23:04,091 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2021-12-06 23:23:04,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:23:04,091 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-12-06 23:23:04,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 57 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:04,091 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-12-06 23:23:04,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-06 23:23:04,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:23:04,091 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:23:04,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 23:23:04,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:23:04,293 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:23:04,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:23:04,294 INFO L85 PathProgramCache]: Analyzing trace with hash 71669487, now seen corresponding path program 22 times [2021-12-06 23:23:04,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:23:04,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738353087] [2021-12-06 23:23:04,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:04,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:23:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:04,561 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:04,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:23:04,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738353087] [2021-12-06 23:23:04,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738353087] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:23:04,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961019335] [2021-12-06 23:23:04,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:23:04,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:23:04,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:23:04,562 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:23:04,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 23:23:04,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:23:04,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:23:04,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 23:23:04,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:23:04,934 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 [2021-12-06 23:23:04,982 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 23:23:04,982 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 27 treesize of output 26 [2021-12-06 23:23:05,202 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:05,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:23:05,307 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 16 treesize of output 14 [2021-12-06 23:23:05,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 23:23:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:05,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961019335] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:23:05,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:23:05,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 36 [2021-12-06 23:23:05,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55770930] [2021-12-06 23:23:05,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:23:05,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 23:23:05,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:23:05,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 23:23:05,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1164, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 23:23:05,345 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:05,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:23:05,748 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2021-12-06 23:23:05,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 23:23:05,749 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-06 23:23:05,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:23:05,749 INFO L225 Difference]: With dead ends: 109 [2021-12-06 23:23:05,749 INFO L226 Difference]: Without dead ends: 107 [2021-12-06 23:23:05,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 102 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=2077, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 23:23:05,750 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 33 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:23:05,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 565 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 985 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2021-12-06 23:23:05,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-06 23:23:05,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 68. [2021-12-06 23:23:05,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:05,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2021-12-06 23:23:05,760 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 60 [2021-12-06 23:23:05,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:23:05,760 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2021-12-06 23:23:05,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:05,761 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2021-12-06 23:23:05,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 23:23:05,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:23:05,761 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:23:05,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-06 23:23:05,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 23:23:05,962 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:23:05,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:23:05,963 INFO L85 PathProgramCache]: Analyzing trace with hash 920885325, now seen corresponding path program 23 times [2021-12-06 23:23:05,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:23:05,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60499862] [2021-12-06 23:23:05,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:05,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:23:05,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:06,230 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:06,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:23:06,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60499862] [2021-12-06 23:23:06,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60499862] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:23:06,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581966049] [2021-12-06 23:23:06,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:23:06,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:23:06,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:23:06,232 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:23:06,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 23:23:06,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-06 23:23:06,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:23:06,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 23:23:06,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:23:06,450 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 [2021-12-06 23:23:06,477 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 23:23:06,478 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 25 treesize of output 24 [2021-12-06 23:23:06,509 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 23:23:06,510 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 25 treesize of output 24 [2021-12-06 23:23:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 1 proven. 248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:06,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:23:06,857 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 16 treesize of output 14 [2021-12-06 23:23:06,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 23:23:06,895 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 248 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:23:06,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581966049] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:23:06,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:23:06,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 37 [2021-12-06 23:23:06,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383544004] [2021-12-06 23:23:06,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:23:06,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 23:23:06,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:23:06,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 23:23:06,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1230, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 23:23:06,897 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 37 states, 37 states have (on average 2.8378378378378377) internal successors, (105), 37 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:07,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:23:07,376 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2021-12-06 23:23:07,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 23:23:07,376 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.8378378378378377) internal successors, (105), 37 states have internal predecessors, (105), 0 states have call successors, (0), 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 62 [2021-12-06 23:23:07,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:23:07,377 INFO L225 Difference]: With dead ends: 107 [2021-12-06 23:23:07,377 INFO L226 Difference]: Without dead ends: 105 [2021-12-06 23:23:07,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 105 SyntacticMatches, 8 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=313, Invalid=2879, Unknown=0, NotChecked=0, Total=3192 [2021-12-06 23:23:07,378 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 69 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:23:07,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 468 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 23:23:07,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-06 23:23:07,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 65. [2021-12-06 23:23:07,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 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) [2021-12-06 23:23:07,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-12-06 23:23:07,391 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2021-12-06 23:23:07,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:23:07,391 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-12-06 23:23:07,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.8378378378378377) internal successors, (105), 37 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:07,392 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-12-06 23:23:07,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 23:23:07,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:23:07,392 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:23:07,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 23:23:07,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 23:23:07,593 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:23:07,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:23:07,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1314727931, now seen corresponding path program 24 times [2021-12-06 23:23:07,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:23:07,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401585790] [2021-12-06 23:23:07,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:07,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:23:07,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:07,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:23:07,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401585790] [2021-12-06 23:23:07,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401585790] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:23:07,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073670114] [2021-12-06 23:23:07,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 23:23:07,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:23:07,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:23:07,841 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:23:07,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 23:23:07,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-06 23:23:07,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:23:07,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 23:23:07,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:23:08,096 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 [2021-12-06 23:23:08,715 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 23:23:08,716 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 44 treesize of output 23 [2021-12-06 23:23:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 153 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:08,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:23:09,452 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 18 treesize of output 16 [2021-12-06 23:23:09,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 23:23:09,474 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 144 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:09,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073670114] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:23:09,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:23:09,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 62 [2021-12-06 23:23:09,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326165543] [2021-12-06 23:23:09,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:23:09,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-06 23:23:09,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:23:09,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-06 23:23:09,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=3350, Unknown=0, NotChecked=0, Total=3782 [2021-12-06 23:23:09,476 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 62 states, 62 states have (on average 2.6774193548387095) internal successors, (166), 62 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) [2021-12-06 23:23:10,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:23:10,182 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2021-12-06 23:23:10,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 23:23:10,182 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.6774193548387095) internal successors, (166), 62 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 64 [2021-12-06 23:23:10,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:23:10,183 INFO L225 Difference]: With dead ends: 111 [2021-12-06 23:23:10,183 INFO L226 Difference]: Without dead ends: 67 [2021-12-06 23:23:10,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=853, Invalid=7703, Unknown=0, NotChecked=0, Total=8556 [2021-12-06 23:23:10,184 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 24 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:23:10,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 461 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 234 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2021-12-06 23:23:10,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-06 23:23:10,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-12-06 23:23:10,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 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) [2021-12-06 23:23:10,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2021-12-06 23:23:10,196 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2021-12-06 23:23:10,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:23:10,197 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2021-12-06 23:23:10,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.6774193548387095) internal successors, (166), 62 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) [2021-12-06 23:23:10,197 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2021-12-06 23:23:10,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 23:23:10,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:23:10,197 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:23:10,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-06 23:23:10,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 23:23:10,399 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:23:10,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:23:10,400 INFO L85 PathProgramCache]: Analyzing trace with hash 2021980771, now seen corresponding path program 25 times [2021-12-06 23:23:10,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:23:10,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614781258] [2021-12-06 23:23:10,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:10,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:23:10,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:10,663 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:10,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:23:10,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614781258] [2021-12-06 23:23:10,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614781258] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:23:10,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216518221] [2021-12-06 23:23:10,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 23:23:10,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:23:10,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:23:10,665 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:23:10,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 23:23:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:10,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-06 23:23:10,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:23:10,757 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 [2021-12-06 23:23:10,804 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 23:23:10,804 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 27 treesize of output 26 [2021-12-06 23:23:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:11,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:23:11,176 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 16 treesize of output 14 [2021-12-06 23:23:11,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 23:23:11,220 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:11,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216518221] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:23:11,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:23:11,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 39 [2021-12-06 23:23:11,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398629522] [2021-12-06 23:23:11,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:23:11,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 23:23:11,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:23:11,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 23:23:11,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1378, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 23:23:11,222 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 39 states, 39 states have (on average 2.8461538461538463) internal successors, (111), 39 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:11,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:23:11,634 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2021-12-06 23:23:11,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 23:23:11,634 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.8461538461538463) internal successors, (111), 39 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-06 23:23:11,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:23:11,635 INFO L225 Difference]: With dead ends: 119 [2021-12-06 23:23:11,635 INFO L226 Difference]: Without dead ends: 117 [2021-12-06 23:23:11,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 113 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=2458, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 23:23:11,635 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 35 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:23:11,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 658 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1124 Invalid, 0 Unknown, 26 Unchecked, 0.3s Time] [2021-12-06 23:23:11,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-06 23:23:11,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 74. [2021-12-06 23:23:11,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:11,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2021-12-06 23:23:11,649 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 66 [2021-12-06 23:23:11,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:23:11,649 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2021-12-06 23:23:11,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.8461538461538463) internal successors, (111), 39 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:11,649 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2021-12-06 23:23:11,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 23:23:11,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:23:11,649 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:23:11,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-06 23:23:11,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:23:11,851 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:23:11,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:23:11,852 INFO L85 PathProgramCache]: Analyzing trace with hash 258473281, now seen corresponding path program 26 times [2021-12-06 23:23:11,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:23:11,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851508719] [2021-12-06 23:23:11,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:11,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:23:11,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:12,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:23:12,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851508719] [2021-12-06 23:23:12,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851508719] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:23:12,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899131239] [2021-12-06 23:23:12,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:23:12,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:23:12,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:23:12,143 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:23:12,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 23:23:12,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:23:12,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:23:12,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-06 23:23:12,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:23:12,238 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 [2021-12-06 23:23:12,267 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 23:23:12,268 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 25 treesize of output 24 [2021-12-06 23:23:12,336 INFO L354 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2021-12-06 23:23:12,336 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 36 treesize of output 38 [2021-12-06 23:23:12,902 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 1 proven. 305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:12,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:23:13,586 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_365| Int)) (or (and (< 8 |v_ULTIMATE.start_main_~i~0#1_365|) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_365| 4) |c_ULTIMATE.start_main_~x~0#1.offset|) 0) (+ 36 |c_ULTIMATE.start_main_~x~0#1.offset|)) 0)) (< |v_ULTIMATE.start_main_~i~0#1_365| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-06 23:23:13,591 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 27 treesize of output 25 [2021-12-06 23:23:13,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2021-12-06 23:23:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 295 refuted. 0 times theorem prover too weak. 0 trivial. 11 not checked. [2021-12-06 23:23:13,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899131239] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:23:13,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:23:13,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 45 [2021-12-06 23:23:13,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586949101] [2021-12-06 23:23:13,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:23:13,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 23:23:13,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:23:13,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 23:23:13,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1749, Unknown=1, NotChecked=84, Total=1980 [2021-12-06 23:23:13,650 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 45 states, 45 states have (on average 2.7111111111111112) internal successors, (122), 45 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:14,193 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_365| Int)) (or (and (< 8 |v_ULTIMATE.start_main_~i~0#1_365|) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_365| 4) |c_ULTIMATE.start_main_~x~0#1.offset|) 0) (+ 36 |c_ULTIMATE.start_main_~x~0#1.offset|)) 0)) (< |v_ULTIMATE.start_main_~i~0#1_365| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= 9 |c_ULTIMATE.start_main_~i~0#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 9) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~x~0#1.offset|)) 0)) is different from false [2021-12-06 23:23:14,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:23:14,235 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2021-12-06 23:23:14,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 23:23:14,235 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.7111111111111112) internal successors, (122), 45 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-06 23:23:14,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:23:14,235 INFO L225 Difference]: With dead ends: 117 [2021-12-06 23:23:14,236 INFO L226 Difference]: Without dead ends: 115 [2021-12-06 23:23:14,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 113 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=148, Invalid=1750, Unknown=2, NotChecked=170, Total=2070 [2021-12-06 23:23:14,236 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 42 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:23:14,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 638 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 330 Invalid, 0 Unknown, 117 Unchecked, 0.1s Time] [2021-12-06 23:23:14,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-06 23:23:14,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 71. [2021-12-06 23:23:14,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 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) [2021-12-06 23:23:14,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2021-12-06 23:23:14,251 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2021-12-06 23:23:14,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:23:14,251 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2021-12-06 23:23:14,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.7111111111111112) internal successors, (122), 45 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:14,251 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2021-12-06 23:23:14,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 23:23:14,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:23:14,251 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:23:14,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-06 23:23:14,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 23:23:14,453 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:23:14,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:23:14,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1742430585, now seen corresponding path program 27 times [2021-12-06 23:23:14,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:23:14,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261632738] [2021-12-06 23:23:14,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:14,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:23:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:14,749 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:14,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:23:14,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261632738] [2021-12-06 23:23:14,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261632738] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:23:14,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507447986] [2021-12-06 23:23:14,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:23:14,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:23:14,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:23:14,750 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:23:14,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 23:23:14,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-06 23:23:14,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:23:14,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 23:23:14,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:23:15,074 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 [2021-12-06 23:23:15,739 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 23:23:15,739 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 44 treesize of output 23 [2021-12-06 23:23:15,759 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 190 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:15,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:23:16,536 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 18 treesize of output 16 [2021-12-06 23:23:16,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 23:23:16,558 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 180 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:16,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507447986] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:23:16,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:23:16,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 67 [2021-12-06 23:23:16,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496357950] [2021-12-06 23:23:16,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:23:16,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-06 23:23:16,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:23:16,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-06 23:23:16,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=3923, Unknown=0, NotChecked=0, Total=4422 [2021-12-06 23:23:16,560 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 67 states, 67 states have (on average 2.716417910447761) internal successors, (182), 67 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:17,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:23:17,393 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2021-12-06 23:23:17,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 23:23:17,394 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.716417910447761) internal successors, (182), 67 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-06 23:23:17,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:23:17,394 INFO L225 Difference]: With dead ends: 121 [2021-12-06 23:23:17,394 INFO L226 Difference]: Without dead ends: 73 [2021-12-06 23:23:17,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1809 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=984, Invalid=9116, Unknown=0, NotChecked=0, Total=10100 [2021-12-06 23:23:17,396 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 25 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:23:17,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 640 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 313 Invalid, 0 Unknown, 83 Unchecked, 0.1s Time] [2021-12-06 23:23:17,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-06 23:23:17,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-12-06 23:23:17,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 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) [2021-12-06 23:23:17,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-12-06 23:23:17,410 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2021-12-06 23:23:17,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:23:17,411 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-12-06 23:23:17,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.716417910447761) internal successors, (182), 67 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:17,411 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-12-06 23:23:17,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 23:23:17,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:23:17,411 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:23:17,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-06 23:23:17,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:23:17,612 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:23:17,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:23:17,613 INFO L85 PathProgramCache]: Analyzing trace with hash -39467689, now seen corresponding path program 28 times [2021-12-06 23:23:17,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:23:17,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478121002] [2021-12-06 23:23:17,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:17,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:23:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:17,948 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 0 proven. 344 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:17,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:23:17,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478121002] [2021-12-06 23:23:17,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478121002] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:23:17,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928954188] [2021-12-06 23:23:17,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:23:17,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:23:17,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:23:17,950 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:23:17,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 23:23:18,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:23:18,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:23:18,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 23:23:18,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:23:18,444 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 [2021-12-06 23:23:18,487 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 23:23:18,487 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 27 treesize of output 26 [2021-12-06 23:23:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 0 proven. 344 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:18,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:23:18,930 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 16 treesize of output 14 [2021-12-06 23:23:18,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 23:23:18,978 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 0 proven. 344 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:18,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928954188] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:23:18,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:23:18,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 42 [2021-12-06 23:23:18,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010949744] [2021-12-06 23:23:18,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:23:18,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 23:23:18,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:23:18,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 23:23:18,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1610, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 23:23:18,980 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 42 states, 42 states have (on average 2.880952380952381) internal successors, (121), 42 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:19,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:23:19,504 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2021-12-06 23:23:19,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 23:23:19,504 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.880952380952381) internal successors, (121), 42 states have internal predecessors, (121), 0 states have call successors, (0), 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 72 [2021-12-06 23:23:19,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:23:19,505 INFO L225 Difference]: With dead ends: 129 [2021-12-06 23:23:19,505 INFO L226 Difference]: Without dead ends: 127 [2021-12-06 23:23:19,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 124 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=209, Invalid=2871, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 23:23:19,506 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 37 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 1384 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:23:19,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 764 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1384 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2021-12-06 23:23:19,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-06 23:23:19,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 80. [2021-12-06 23:23:19,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 79 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:19,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2021-12-06 23:23:19,522 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 72 [2021-12-06 23:23:19,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:23:19,522 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2021-12-06 23:23:19,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.880952380952381) internal successors, (121), 42 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:19,523 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2021-12-06 23:23:19,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-06 23:23:19,523 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:23:19,523 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:23:19,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-06 23:23:19,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:23:19,724 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:23:19,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:23:19,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1248242101, now seen corresponding path program 29 times [2021-12-06 23:23:19,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:23:19,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519933645] [2021-12-06 23:23:19,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:19,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:23:19,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:20,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:23:20,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519933645] [2021-12-06 23:23:20,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519933645] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:23:20,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856178693] [2021-12-06 23:23:20,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:23:20,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:23:20,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:23:20,060 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:23:20,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 23:23:20,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-12-06 23:23:20,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:23:20,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-06 23:23:20,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:23:20,257 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 [2021-12-06 23:23:20,286 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 23:23:20,287 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 25 treesize of output 24 [2021-12-06 23:23:20,314 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 23:23:20,314 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 25 treesize of output 24 [2021-12-06 23:23:20,613 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 1 proven. 368 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:20,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:23:20,779 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 16 treesize of output 14 [2021-12-06 23:23:20,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 23:23:20,825 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 368 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:23:20,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856178693] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:23:20,826 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:23:20,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 43 [2021-12-06 23:23:20,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903262293] [2021-12-06 23:23:20,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:23:20,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 23:23:20,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:23:20,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 23:23:20,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1688, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 23:23:20,827 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 43 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 43 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:21,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:23:21,545 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2021-12-06 23:23:21,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 23:23:21,545 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 43 states have internal predecessors, (125), 0 states have call successors, (0), 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 74 [2021-12-06 23:23:21,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:23:21,546 INFO L225 Difference]: With dead ends: 127 [2021-12-06 23:23:21,546 INFO L226 Difference]: Without dead ends: 125 [2021-12-06 23:23:21,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 127 SyntacticMatches, 8 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=371, Invalid=4051, Unknown=0, NotChecked=0, Total=4422 [2021-12-06 23:23:21,547 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 139 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 1846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:23:21,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 718 Invalid, 1846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1725 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 23:23:21,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-06 23:23:21,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 77. [2021-12-06 23:23:21,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 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) [2021-12-06 23:23:21,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-12-06 23:23:21,565 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2021-12-06 23:23:21,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:23:21,565 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-12-06 23:23:21,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 43 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:21,565 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-12-06 23:23:21,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 23:23:21,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:23:21,565 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:23:21,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-06 23:23:21,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-06 23:23:21,766 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:23:21,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:23:21,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1997172115, now seen corresponding path program 30 times [2021-12-06 23:23:21,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:23:21,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581716492] [2021-12-06 23:23:21,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:21,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:23:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:22,080 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:22,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:23:22,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581716492] [2021-12-06 23:23:22,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581716492] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:23:22,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995152953] [2021-12-06 23:23:22,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 23:23:22,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:23:22,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:23:22,081 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:23:22,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-06 23:23:22,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-06 23:23:22,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:23:22,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 23:23:22,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:23:22,529 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 [2021-12-06 23:23:23,279 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 23:23:23,279 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 44 treesize of output 23 [2021-12-06 23:23:23,304 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 231 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:23,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:23:24,249 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 18 treesize of output 16 [2021-12-06 23:23:24,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 23:23:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 220 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:24,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995152953] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:23:24,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:23:24,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 72 [2021-12-06 23:23:24,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157337258] [2021-12-06 23:23:24,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:23:24,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-06 23:23:24,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:23:24,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-06 23:23:24,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=4541, Unknown=0, NotChecked=0, Total=5112 [2021-12-06 23:23:24,275 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 72 states, 72 states have (on average 2.75) internal successors, (198), 72 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:25,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:23:25,596 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2021-12-06 23:23:25,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-06 23:23:25,597 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.75) internal successors, (198), 72 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-06 23:23:25,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:23:25,597 INFO L225 Difference]: With dead ends: 131 [2021-12-06 23:23:25,597 INFO L226 Difference]: Without dead ends: 79 [2021-12-06 23:23:25,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2644 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1355, Invalid=12925, Unknown=0, NotChecked=0, Total=14280 [2021-12-06 23:23:25,599 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 57 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:23:25,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 656 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 394 Invalid, 0 Unknown, 204 Unchecked, 0.1s Time] [2021-12-06 23:23:25,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-06 23:23:25,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-12-06 23:23:25,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 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) [2021-12-06 23:23:25,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2021-12-06 23:23:25,616 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2021-12-06 23:23:25,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:23:25,617 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2021-12-06 23:23:25,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.75) internal successors, (198), 72 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:25,617 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2021-12-06 23:23:25,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-06 23:23:25,617 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:23:25,617 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:23:25,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-06 23:23:25,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-06 23:23:25,818 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:23:25,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:23:25,819 INFO L85 PathProgramCache]: Analyzing trace with hash 131143627, now seen corresponding path program 31 times [2021-12-06 23:23:25,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:23:25,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14072472] [2021-12-06 23:23:25,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:25,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:23:25,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 0 proven. 411 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:26,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:23:26,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14072472] [2021-12-06 23:23:26,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14072472] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:23:26,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713933110] [2021-12-06 23:23:26,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 23:23:26,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:23:26,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:23:26,173 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:23:26,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-06 23:23:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:26,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-06 23:23:26,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:23:26,297 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 [2021-12-06 23:23:26,343 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 23:23:26,344 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 27 treesize of output 26 [2021-12-06 23:23:26,671 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 0 proven. 411 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:26,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:23:26,802 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 16 treesize of output 14 [2021-12-06 23:23:26,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 23:23:26,849 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 0 proven. 411 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:26,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713933110] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:23:26,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:23:26,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 45 [2021-12-06 23:23:26,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106252711] [2021-12-06 23:23:26,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:23:26,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 23:23:26,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:23:26,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 23:23:26,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1860, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 23:23:26,850 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 45 states, 45 states have (on average 2.911111111111111) internal successors, (131), 45 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:27,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:23:27,485 INFO L93 Difference]: Finished difference Result 139 states and 141 transitions. [2021-12-06 23:23:27,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 23:23:27,486 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.911111111111111) internal successors, (131), 45 states have internal predecessors, (131), 0 states have call successors, (0), 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 78 [2021-12-06 23:23:27,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:23:27,486 INFO L225 Difference]: With dead ends: 139 [2021-12-06 23:23:27,487 INFO L226 Difference]: Without dead ends: 137 [2021-12-06 23:23:27,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 135 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=224, Invalid=3316, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 23:23:27,487 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 37 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 1830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:23:27,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 935 Invalid, 1830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1798 Invalid, 0 Unknown, 1 Unchecked, 0.4s Time] [2021-12-06 23:23:27,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-06 23:23:27,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 86. [2021-12-06 23:23:27,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.035294117647059) internal successors, (88), 85 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:27,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2021-12-06 23:23:27,508 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 78 [2021-12-06 23:23:27,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:23:27,508 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2021-12-06 23:23:27,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.911111111111111) internal successors, (131), 45 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:27,508 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2021-12-06 23:23:27,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-06 23:23:27,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:23:27,508 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:23:27,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-12-06 23:23:27,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:23:27,709 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:23:27,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:23:27,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1038138793, now seen corresponding path program 32 times [2021-12-06 23:23:27,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:23:27,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56961942] [2021-12-06 23:23:27,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:27,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:23:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 438 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:28,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:23:28,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56961942] [2021-12-06 23:23:28,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56961942] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:23:28,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638792809] [2021-12-06 23:23:28,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:23:28,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:23:28,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:23:28,077 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:23:28,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-06 23:23:28,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:23:28,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:23:28,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-06 23:23:28,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:23:28,194 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 [2021-12-06 23:23:28,223 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 23:23:28,223 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 25 treesize of output 24 [2021-12-06 23:23:28,293 INFO L354 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2021-12-06 23:23:28,293 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 36 treesize of output 38 [2021-12-06 23:23:29,017 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 1 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:29,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:23:29,698 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_515| Int)) (or (and (< 10 |v_ULTIMATE.start_main_~i~0#1_515|) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_515| 4) |c_ULTIMATE.start_main_~x~0#1.offset|) 0) (+ 44 |c_ULTIMATE.start_main_~x~0#1.offset|)) 0)) (< |v_ULTIMATE.start_main_~i~0#1_515| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-06 23:23:29,705 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 27 treesize of output 25 [2021-12-06 23:23:29,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2021-12-06 23:23:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 13 not checked. [2021-12-06 23:23:29,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638792809] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:23:29,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:23:29,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 32] total 51 [2021-12-06 23:23:29,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912184233] [2021-12-06 23:23:29,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:23:29,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 23:23:29,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:23:29,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 23:23:29,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2289, Unknown=1, NotChecked=96, Total=2550 [2021-12-06 23:23:29,759 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 51 states, 51 states have (on average 2.784313725490196) internal successors, (142), 51 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:30,384 WARN L838 $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_main_~i~0#1| 11) (forall ((|v_ULTIMATE.start_main_~i~0#1_515| Int)) (or (and (< 10 |v_ULTIMATE.start_main_~i~0#1_515|) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_515| 4) |c_ULTIMATE.start_main_~x~0#1.offset|) 0) (+ 44 |c_ULTIMATE.start_main_~x~0#1.offset|)) 0)) (< |v_ULTIMATE.start_main_~i~0#1_515| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~x~0#1.offset|)) 0) (<= 11 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2021-12-06 23:23:30,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:23:30,455 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2021-12-06 23:23:30,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 23:23:30,455 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.784313725490196) internal successors, (142), 51 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-06 23:23:30,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:23:30,456 INFO L225 Difference]: With dead ends: 137 [2021-12-06 23:23:30,456 INFO L226 Difference]: Without dead ends: 135 [2021-12-06 23:23:30,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 135 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=166, Invalid=2290, Unknown=2, NotChecked=194, Total=2652 [2021-12-06 23:23:30,457 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 48 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:23:30,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 891 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 722 Invalid, 0 Unknown, 283 Unchecked, 0.2s Time] [2021-12-06 23:23:30,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-06 23:23:30,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 83. [2021-12-06 23:23:30,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 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) [2021-12-06 23:23:30,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2021-12-06 23:23:30,478 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2021-12-06 23:23:30,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:23:30,478 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2021-12-06 23:23:30,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.784313725490196) internal successors, (142), 51 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:30,479 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2021-12-06 23:23:30,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 23:23:30,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:23:30,479 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:23:30,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-06 23:23:30,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-06 23:23:30,680 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:23:30,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:23:30,681 INFO L85 PathProgramCache]: Analyzing trace with hash 260737761, now seen corresponding path program 33 times [2021-12-06 23:23:30,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:23:30,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676468695] [2021-12-06 23:23:30,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:30,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:23:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:31,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:23:31,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676468695] [2021-12-06 23:23:31,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676468695] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:23:31,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775777735] [2021-12-06 23:23:31,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:23:31,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:23:31,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:23:31,166 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:23:31,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-06 23:23:31,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-12-06 23:23:31,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:23:31,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 23:23:31,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:23:31,543 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 [2021-12-06 23:23:32,408 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 23:23:32,408 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 44 treesize of output 23 [2021-12-06 23:23:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 276 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:32,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:23:33,324 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 18 treesize of output 16 [2021-12-06 23:23:33,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 23:23:33,353 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 264 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:33,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775777735] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:23:33,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:23:33,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 32] total 77 [2021-12-06 23:23:33,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633459859] [2021-12-06 23:23:33,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:23:33,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-06 23:23:33,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:23:33,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-06 23:23:33,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=5192, Unknown=0, NotChecked=0, Total=5852 [2021-12-06 23:23:33,355 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 77 states, 77 states have (on average 2.779220779220779) internal successors, (214), 77 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:34,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:23:34,532 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2021-12-06 23:23:34,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-06 23:23:34,532 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.779220779220779) internal successors, (214), 77 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-06 23:23:34,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:23:34,533 INFO L225 Difference]: With dead ends: 141 [2021-12-06 23:23:34,533 INFO L226 Difference]: Without dead ends: 85 [2021-12-06 23:23:34,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3242 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1309, Invalid=12263, Unknown=0, NotChecked=0, Total=13572 [2021-12-06 23:23:34,534 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 78 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:23:34,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 730 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 392 Invalid, 0 Unknown, 210 Unchecked, 0.1s Time] [2021-12-06 23:23:34,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-06 23:23:34,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-12-06 23:23:34,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:34,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-12-06 23:23:34,556 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2021-12-06 23:23:34,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:23:34,556 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-12-06 23:23:34,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.779220779220779) internal successors, (214), 77 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:34,557 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-12-06 23:23:34,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 23:23:34,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:23:34,557 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:23:34,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-06 23:23:34,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:23:34,758 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:23:34,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:23:34,760 INFO L85 PathProgramCache]: Analyzing trace with hash -948432449, now seen corresponding path program 34 times [2021-12-06 23:23:34,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:23:34,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457581659] [2021-12-06 23:23:34,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:34,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:23:34,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:35,279 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:35,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:23:35,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457581659] [2021-12-06 23:23:35,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457581659] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:23:35,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989822752] [2021-12-06 23:23:35,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:23:35,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:23:35,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:23:35,280 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:23:35,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-06 23:23:35,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:23:35,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:23:35,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-06 23:23:35,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:23:36,107 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 [2021-12-06 23:23:36,153 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-06 23:23:36,153 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 [2021-12-06 23:23:36,250 INFO L354 Elim1Store]: treesize reduction 92, result has 20.7 percent of original size [2021-12-06 23:23:36,250 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 39 treesize of output 41 [2021-12-06 23:23:44,294 INFO L354 Elim1Store]: treesize reduction 91, result has 3.2 percent of original size [2021-12-06 23:23:44,295 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 63 treesize of output 29 [2021-12-06 23:23:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:44,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:23:45,192 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 16 treesize of output 14 [2021-12-06 23:23:45,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 23:23:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 478 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 23:23:45,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989822752] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:23:45,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:23:45,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 35, 31] total 82 [2021-12-06 23:23:45,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855180370] [2021-12-06 23:23:45,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:23:45,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-06 23:23:45,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:23:45,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-06 23:23:45,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=6031, Unknown=5, NotChecked=0, Total=6642 [2021-12-06 23:23:45,273 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 82 states, 82 states have (on average 2.707317073170732) internal successors, (222), 82 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:59,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:23:59,072 INFO L93 Difference]: Finished difference Result 194 states and 208 transitions. [2021-12-06 23:23:59,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-12-06 23:23:59,073 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.707317073170732) internal successors, (222), 82 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-06 23:23:59,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:23:59,074 INFO L225 Difference]: With dead ends: 194 [2021-12-06 23:23:59,074 INFO L226 Difference]: Without dead ends: 192 [2021-12-06 23:23:59,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 138 SyntacticMatches, 4 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7103 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=2087, Invalid=25296, Unknown=7, NotChecked=0, Total=27390 [2021-12-06 23:23:59,075 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 141 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:23:59,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 1110 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 438 Invalid, 0 Unknown, 167 Unchecked, 0.1s Time] [2021-12-06 23:23:59,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-12-06 23:23:59,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2021-12-06 23:23:59,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.0215827338129497) internal successors, (142), 139 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:59,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2021-12-06 23:23:59,129 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 84 [2021-12-06 23:23:59,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:23:59,129 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2021-12-06 23:23:59,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.707317073170732) internal successors, (222), 82 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:23:59,130 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2021-12-06 23:23:59,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-06 23:23:59,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:23:59,130 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:23:59,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-06 23:23:59,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-06 23:23:59,332 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:23:59,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:23:59,333 INFO L85 PathProgramCache]: Analyzing trace with hash 55825203, now seen corresponding path program 35 times [2021-12-06 23:23:59,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:23:59,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842720127] [2021-12-06 23:23:59,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:23:59,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:23:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:23:59,753 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 563 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:23:59,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:23:59,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842720127] [2021-12-06 23:23:59,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842720127] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:23:59,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845712619] [2021-12-06 23:23:59,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:23:59,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:23:59,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:23:59,754 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:23:59,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-06 23:23:59,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-12-06 23:23:59,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:23:59,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-06 23:23:59,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:24:00,021 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 [2021-12-06 23:24:00,071 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 23:24:00,072 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 27 treesize of output 26 [2021-12-06 23:24:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 563 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:00,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:24:00,691 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 16 treesize of output 14 [2021-12-06 23:24:00,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 23:24:00,752 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 563 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:00,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845712619] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:24:00,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:24:00,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 51 [2021-12-06 23:24:00,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252171179] [2021-12-06 23:24:00,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:24:00,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 23:24:00,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:24:00,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 23:24:00,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2414, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 23:24:00,754 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand has 51 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 51 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:01,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:01,632 INFO L93 Difference]: Finished difference Result 258 states and 261 transitions. [2021-12-06 23:24:01,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-06 23:24:01,633 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 51 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-12-06 23:24:01,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:01,634 INFO L225 Difference]: With dead ends: 258 [2021-12-06 23:24:01,634 INFO L226 Difference]: Without dead ends: 256 [2021-12-06 23:24:01,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 157 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=254, Invalid=4302, Unknown=0, NotChecked=0, Total=4556 [2021-12-06 23:24:01,635 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 46 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 2226 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1243 SdHoareTripleChecker+Invalid, 2267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:01,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 1243 Invalid, 2267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2226 Invalid, 0 Unknown, 2 Unchecked, 0.6s Time] [2021-12-06 23:24:01,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-12-06 23:24:01,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 143. [2021-12-06 23:24:01,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.028169014084507) internal successors, (146), 142 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:01,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 146 transitions. [2021-12-06 23:24:01,695 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 146 transitions. Word has length 90 [2021-12-06 23:24:01,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:24:01,696 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 146 transitions. [2021-12-06 23:24:01,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 51 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:01,696 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 146 transitions. [2021-12-06 23:24:01,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-06 23:24:01,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:01,697 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:01,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-06 23:24:01,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-06 23:24:01,897 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:01,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:01,898 INFO L85 PathProgramCache]: Analyzing trace with hash -474768367, now seen corresponding path program 36 times [2021-12-06 23:24:01,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:01,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569056809] [2021-12-06 23:24:01,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:01,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:02,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:24:02,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569056809] [2021-12-06 23:24:02,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569056809] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:24:02,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074118889] [2021-12-06 23:24:02,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 23:24:02,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:02,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:24:02,337 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:24:02,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-06 23:24:02,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-12-06 23:24:02,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:24:02,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-06 23:24:02,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:24:02,846 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 [2021-12-06 23:24:02,876 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 23:24:02,877 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 25 treesize of output 24 [2021-12-06 23:24:02,904 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 23:24:02,904 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 25 treesize of output 24 [2021-12-06 23:24:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 1 proven. 593 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:03,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:24:03,527 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 16 treesize of output 14 [2021-12-06 23:24:03,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 23:24:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 593 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:24:03,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074118889] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:24:03,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:24:03,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 52 [2021-12-06 23:24:03,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818347862] [2021-12-06 23:24:03,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:24:03,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 23:24:03,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:24:03,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 23:24:03,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2510, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 23:24:03,584 INFO L87 Difference]: Start difference. First operand 143 states and 146 transitions. Second operand has 52 states, 52 states have (on average 2.980769230769231) internal successors, (155), 52 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:05,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:05,449 INFO L93 Difference]: Finished difference Result 262 states and 265 transitions. [2021-12-06 23:24:05,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-06 23:24:05,450 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.980769230769231) internal successors, (155), 52 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-12-06 23:24:05,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:05,451 INFO L225 Difference]: With dead ends: 262 [2021-12-06 23:24:05,451 INFO L226 Difference]: Without dead ends: 260 [2021-12-06 23:24:05,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 160 SyntacticMatches, 8 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2873 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=805, Invalid=11627, Unknown=0, NotChecked=0, Total=12432 [2021-12-06 23:24:05,452 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 171 mSDsluCounter, 2094 mSDsCounter, 0 mSdLazyCounter, 3597 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 2155 SdHoareTripleChecker+Invalid, 3748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 3597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:05,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 2155 Invalid, 3748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 3597 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 23:24:05,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-06 23:24:05,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 140. [2021-12-06 23:24:05,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.0215827338129497) internal successors, (142), 139 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:05,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2021-12-06 23:24:05,504 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 92 [2021-12-06 23:24:05,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:24:05,504 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2021-12-06 23:24:05,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.980769230769231) internal successors, (155), 52 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:05,505 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2021-12-06 23:24:05,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-06 23:24:05,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:05,505 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:05,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-12-06 23:24:05,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-06 23:24:05,706 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:05,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:05,708 INFO L85 PathProgramCache]: Analyzing trace with hash -890154423, now seen corresponding path program 37 times [2021-12-06 23:24:05,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:05,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49981004] [2021-12-06 23:24:05,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:05,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 0 proven. 617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:06,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:24:06,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49981004] [2021-12-06 23:24:06,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49981004] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:24:06,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100931946] [2021-12-06 23:24:06,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 23:24:06,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:06,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:24:06,166 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:24:06,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-06 23:24:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:06,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-06 23:24:06,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:24:06,296 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 [2021-12-06 23:24:06,741 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 0 proven. 617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:06,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:24:06,850 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 16 treesize of output 14 [2021-12-06 23:24:06,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 23:24:06,908 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 0 proven. 617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:06,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100931946] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:24:06,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:24:06,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 51 [2021-12-06 23:24:06,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475742908] [2021-12-06 23:24:06,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:24:06,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 23:24:06,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:24:06,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 23:24:06,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2418, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 23:24:06,910 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand has 51 states, 51 states have (on average 3.0784313725490198) internal successors, (157), 51 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:07,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:07,810 INFO L93 Difference]: Finished difference Result 210 states and 212 transitions. [2021-12-06 23:24:07,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-06 23:24:07,810 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.0784313725490198) internal successors, (157), 51 states have internal predecessors, (157), 0 states have call successors, (0), 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 94 [2021-12-06 23:24:07,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:07,811 INFO L225 Difference]: With dead ends: 210 [2021-12-06 23:24:07,811 INFO L226 Difference]: Without dead ends: 208 [2021-12-06 23:24:07,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 167 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=261, Invalid=4569, Unknown=0, NotChecked=0, Total=4830 [2021-12-06 23:24:07,812 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 70 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 2596 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1448 SdHoareTripleChecker+Invalid, 2661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:07,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 1448 Invalid, 2661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2596 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 23:24:07,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-06 23:24:07,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 140. [2021-12-06 23:24:07,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.0215827338129497) internal successors, (142), 139 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:07,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2021-12-06 23:24:07,867 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 94 [2021-12-06 23:24:07,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:24:07,867 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2021-12-06 23:24:07,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.0784313725490198) internal successors, (157), 51 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:07,868 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2021-12-06 23:24:07,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-06 23:24:07,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:07,868 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:07,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-06 23:24:08,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-06 23:24:08,070 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:08,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:08,071 INFO L85 PathProgramCache]: Analyzing trace with hash 2062374495, now seen corresponding path program 38 times [2021-12-06 23:24:08,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:08,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856787542] [2021-12-06 23:24:08,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:08,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:08,351 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 393 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:08,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:24:08,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856787542] [2021-12-06 23:24:08,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856787542] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:24:08,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757839281] [2021-12-06 23:24:08,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:24:08,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:08,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:24:08,352 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:24:08,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-06 23:24:08,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:24:08,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:24:08,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 23:24:08,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:24:08,860 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 450 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:08,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:24:08,965 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 450 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:08,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757839281] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:24:08,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:24:08,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2021-12-06 23:24:08,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407937248] [2021-12-06 23:24:08,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:24:08,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-06 23:24:08,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:24:08,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-06 23:24:08,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=2122, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 23:24:08,967 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand has 53 states, 53 states have (on average 3.169811320754717) internal successors, (168), 53 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:09,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:09,503 INFO L93 Difference]: Finished difference Result 269 states and 272 transitions. [2021-12-06 23:24:09,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-06 23:24:09,504 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.169811320754717) internal successors, (168), 53 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-06 23:24:09,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:09,504 INFO L225 Difference]: With dead ends: 269 [2021-12-06 23:24:09,504 INFO L226 Difference]: Without dead ends: 102 [2021-12-06 23:24:09,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1713, Invalid=5769, Unknown=0, NotChecked=0, Total=7482 [2021-12-06 23:24:09,505 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 54 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:09,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 359 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:24:09,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-06 23:24:09,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-12-06 23:24:09,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:09,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-12-06 23:24:09,541 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2021-12-06 23:24:09,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:24:09,541 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-12-06 23:24:09,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.169811320754717) internal successors, (168), 53 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:09,541 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-12-06 23:24:09,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-06 23:24:09,542 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:09,542 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:09,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-12-06 23:24:09,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:09,744 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:09,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:09,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1772265155, now seen corresponding path program 39 times [2021-12-06 23:24:09,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:09,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668005445] [2021-12-06 23:24:09,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:09,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:10,212 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:10,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:24:10,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668005445] [2021-12-06 23:24:10,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668005445] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:24:10,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548507131] [2021-12-06 23:24:10,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:24:10,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:10,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:24:10,213 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:24:10,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-06 23:24:10,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-12-06 23:24:10,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:24:10,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 23:24:10,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:24:11,067 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 [2021-12-06 23:24:12,387 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 23:24:12,387 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 44 treesize of output 23 [2021-12-06 23:24:12,416 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 435 proven. 271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:12,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:24:14,113 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 18 treesize of output 16 [2021-12-06 23:24:14,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 23:24:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 420 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:14,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548507131] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:24:14,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:24:14,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 38] total 92 [2021-12-06 23:24:14,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132914668] [2021-12-06 23:24:14,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:24:14,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-12-06 23:24:14,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:24:14,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-12-06 23:24:14,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=909, Invalid=7462, Unknown=1, NotChecked=0, Total=8372 [2021-12-06 23:24:14,147 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 92 states, 92 states have (on average 2.847826086956522) internal successors, (262), 92 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:15,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:15,818 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2021-12-06 23:24:15,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-06 23:24:15,818 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.847826086956522) internal successors, (262), 92 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-12-06 23:24:15,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:15,819 INFO L225 Difference]: With dead ends: 171 [2021-12-06 23:24:15,819 INFO L226 Difference]: Without dead ends: 103 [2021-12-06 23:24:15,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3449 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1774, Invalid=17965, Unknown=1, NotChecked=0, Total=19740 [2021-12-06 23:24:15,820 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 35 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:15,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 895 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 574 Invalid, 0 Unknown, 153 Unchecked, 0.1s Time] [2021-12-06 23:24:15,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-06 23:24:15,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-12-06 23:24:15,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:15,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2021-12-06 23:24:15,857 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2021-12-06 23:24:15,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:24:15,857 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2021-12-06 23:24:15,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.847826086956522) internal successors, (262), 92 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:15,857 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2021-12-06 23:24:15,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-06 23:24:15,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:15,858 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:15,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-12-06 23:24:16,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:16,059 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:16,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:16,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1779028837, now seen corresponding path program 40 times [2021-12-06 23:24:16,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:16,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492976610] [2021-12-06 23:24:16,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:16,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:16,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 0 proven. 739 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:16,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:24:16,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492976610] [2021-12-06 23:24:16,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492976610] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:24:16,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048910790] [2021-12-06 23:24:16,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:24:16,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:16,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:24:16,535 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:24:16,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-06 23:24:16,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:24:16,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:24:16,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-06 23:24:16,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:24:17,065 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 [2021-12-06 23:24:17,093 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 23:24:17,094 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 25 treesize of output 24 [2021-12-06 23:24:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:24:17,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:24:18,199 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~x~0#1.offset|) 0) (+ 60 |c_ULTIMATE.start_main_~x~0#1.offset|)) 0)) is different from false [2021-12-06 23:24:18,206 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 23 treesize of output 21 [2021-12-06 23:24:18,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2021-12-06 23:24:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 0 proven. 706 refuted. 0 times theorem prover too weak. 0 trivial. 33 not checked. [2021-12-06 23:24:18,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048910790] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:24:18,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:24:18,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 36, 37] total 56 [2021-12-06 23:24:18,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367285839] [2021-12-06 23:24:18,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:24:18,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-06 23:24:18,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:24:18,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-06 23:24:18,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2828, Unknown=1, NotChecked=106, Total=3080 [2021-12-06 23:24:18,271 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 56 states, 56 states have (on average 3.0714285714285716) internal successors, (172), 56 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:19,124 WARN L838 $PredicateComparison]: unable to prove that (and (<= 15 |c_ULTIMATE.start_main_~i~0#1|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~x~0#1.offset|)) 0) (<= |c_ULTIMATE.start_main_~i~0#1| 15) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~x~0#1.offset|) 0) (+ 60 |c_ULTIMATE.start_main_~x~0#1.offset|)) 0))) is different from false [2021-12-06 23:24:19,571 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ 60 |c_ULTIMATE.start_main_~x~0#1.offset|)) 0) (not (= (* 4 |c_ULTIMATE.start_main_~i~0#1|) 60)) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~x~0#1.offset|) 0) (+ 60 |c_ULTIMATE.start_main_~x~0#1.offset|)) 0))) is different from false [2021-12-06 23:24:20,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:20,304 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2021-12-06 23:24:20,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-06 23:24:20,305 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.0714285714285716) internal successors, (172), 56 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-12-06 23:24:20,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:20,305 INFO L225 Difference]: With dead ends: 112 [2021-12-06 23:24:20,306 INFO L226 Difference]: Without dead ends: 110 [2021-12-06 23:24:20,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 180 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=281, Invalid=5130, Unknown=3, NotChecked=438, Total=5852 [2021-12-06 23:24:20,307 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 59 mSDsluCounter, 1417 mSDsCounter, 0 mSdLazyCounter, 3017 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 3188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 3017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:20,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 1456 Invalid, 3188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 3017 Invalid, 0 Unknown, 106 Unchecked, 0.8s Time] [2021-12-06 23:24:20,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-06 23:24:20,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2021-12-06 23:24:20,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:20,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2021-12-06 23:24:20,351 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 102 [2021-12-06 23:24:20,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:24:20,351 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2021-12-06 23:24:20,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.0714285714285716) internal successors, (172), 56 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:20,352 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2021-12-06 23:24:20,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-06 23:24:20,352 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:20,352 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:20,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-12-06 23:24:20,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:20,553 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:20,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:20,554 INFO L85 PathProgramCache]: Analyzing trace with hash 678999985, now seen corresponding path program 41 times [2021-12-06 23:24:20,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:20,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828982791] [2021-12-06 23:24:20,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:20,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:21,085 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:21,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:24:21,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828982791] [2021-12-06 23:24:21,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828982791] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:24:21,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903412787] [2021-12-06 23:24:21,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:24:21,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:21,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:24:21,086 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:24:21,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-06 23:24:21,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-12-06 23:24:21,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:24:21,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-06 23:24:21,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:24:21,588 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 [2021-12-06 23:24:22,203 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:22,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:24:22,339 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 16 treesize of output 14 [2021-12-06 23:24:22,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 23:24:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:22,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903412787] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:24:22,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:24:22,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 57 [2021-12-06 23:24:22,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694274442] [2021-12-06 23:24:22,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:24:22,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-06 23:24:22,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:24:22,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-06 23:24:22,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=3044, Unknown=0, NotChecked=0, Total=3192 [2021-12-06 23:24:22,419 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 57 states, 57 states have (on average 3.1052631578947367) internal successors, (177), 57 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:23,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:23,657 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2021-12-06 23:24:23,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-06 23:24:23,657 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.1052631578947367) internal successors, (177), 57 states have internal predecessors, (177), 0 states have call successors, (0), 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 106 [2021-12-06 23:24:23,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:23,658 INFO L225 Difference]: With dead ends: 117 [2021-12-06 23:24:23,658 INFO L226 Difference]: Without dead ends: 115 [2021-12-06 23:24:23,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 189 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=287, Invalid=5565, Unknown=0, NotChecked=0, Total=5852 [2021-12-06 23:24:23,659 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 68 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 3167 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1510 SdHoareTripleChecker+Invalid, 3240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 3167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:23,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 1510 Invalid, 3240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 3167 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 23:24:23,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-06 23:24:23,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2021-12-06 23:24:23,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:23,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2021-12-06 23:24:23,697 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 106 [2021-12-06 23:24:23,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:24:23,698 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2021-12-06 23:24:23,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.1052631578947367) internal successors, (177), 57 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:23,698 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2021-12-06 23:24:23,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-06 23:24:23,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:23,698 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:23,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-12-06 23:24:23,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:23,899 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:23,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:23,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1374930887, now seen corresponding path program 42 times [2021-12-06 23:24:23,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:23,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229310958] [2021-12-06 23:24:23,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:23,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:24,217 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 513 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:24,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:24:24,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229310958] [2021-12-06 23:24:24,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229310958] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:24:24,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446813108] [2021-12-06 23:24:24,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 23:24:24,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:24,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:24:24,219 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:24:24,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-06 23:24:25,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-12-06 23:24:25,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:24:25,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 23:24:25,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:24:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 578 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:25,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:24:25,724 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 578 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:25,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446813108] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:24:25,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:24:25,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 59 [2021-12-06 23:24:25,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870851244] [2021-12-06 23:24:25,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:24:25,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-06 23:24:25,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:24:25,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-06 23:24:25,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=2638, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 23:24:25,725 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 59 states, 59 states have (on average 3.1864406779661016) internal successors, (188), 59 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:26,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:26,129 INFO L93 Difference]: Finished difference Result 190 states and 192 transitions. [2021-12-06 23:24:26,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 23:24:26,129 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.1864406779661016) internal successors, (188), 59 states have internal predecessors, (188), 0 states have call successors, (0), 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 110 [2021-12-06 23:24:26,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:26,130 INFO L225 Difference]: With dead ends: 190 [2021-12-06 23:24:26,130 INFO L226 Difference]: Without dead ends: 114 [2021-12-06 23:24:26,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1357, Invalid=4649, Unknown=0, NotChecked=0, Total=6006 [2021-12-06 23:24:26,131 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 33 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:26,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 409 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:24:26,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-06 23:24:26,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-12-06 23:24:26,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:26,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2021-12-06 23:24:26,169 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2021-12-06 23:24:26,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:24:26,169 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2021-12-06 23:24:26,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.1864406779661016) internal successors, (188), 59 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:26,169 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2021-12-06 23:24:26,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 23:24:26,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:26,170 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:26,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-12-06 23:24:26,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-06 23:24:26,371 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:26,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:26,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1186695771, now seen corresponding path program 43 times [2021-12-06 23:24:26,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:26,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615875706] [2021-12-06 23:24:26,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:26,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:26,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:26,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:24:26,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615875706] [2021-12-06 23:24:26,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615875706] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:24:26,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920889175] [2021-12-06 23:24:26,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 23:24:26,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:26,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:24:26,906 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:24:26,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-06 23:24:26,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:26,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-06 23:24:26,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:24:27,062 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 [2021-12-06 23:24:27,731 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:27,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:24:27,865 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 16 treesize of output 14 [2021-12-06 23:24:27,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 23:24:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:27,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920889175] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:24:27,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:24:27,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 60 [2021-12-06 23:24:27,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661479055] [2021-12-06 23:24:27,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:24:27,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-06 23:24:27,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:24:27,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-06 23:24:27,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=3384, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 23:24:27,944 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 60 states, 60 states have (on average 3.1166666666666667) internal successors, (187), 60 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:29,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:29,086 INFO L93 Difference]: Finished difference Result 123 states and 124 transitions. [2021-12-06 23:24:29,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-06 23:24:29,086 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.1166666666666667) internal successors, (187), 60 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-06 23:24:29,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:29,087 INFO L225 Difference]: With dead ends: 123 [2021-12-06 23:24:29,087 INFO L226 Difference]: Without dead ends: 121 [2021-12-06 23:24:29,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 200 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=302, Invalid=6178, Unknown=0, NotChecked=0, Total=6480 [2021-12-06 23:24:29,087 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 69 mSDsluCounter, 1634 mSDsCounter, 0 mSdLazyCounter, 3329 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1676 SdHoareTripleChecker+Invalid, 3405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 3329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:29,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 1676 Invalid, 3405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 3329 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 23:24:29,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-06 23:24:29,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2021-12-06 23:24:29,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:29,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2021-12-06 23:24:29,127 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 112 [2021-12-06 23:24:29,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:24:29,127 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2021-12-06 23:24:29,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.1166666666666667) internal successors, (187), 60 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:29,127 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2021-12-06 23:24:29,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-06 23:24:29,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:29,128 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:29,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-06 23:24:29,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:29,329 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:29,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:29,330 INFO L85 PathProgramCache]: Analyzing trace with hash -100176965, now seen corresponding path program 44 times [2021-12-06 23:24:29,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:29,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584354858] [2021-12-06 23:24:29,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:29,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 579 proven. 393 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:29,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:24:29,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584354858] [2021-12-06 23:24:29,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584354858] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:24:29,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998809772] [2021-12-06 23:24:29,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:24:29,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:29,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:24:29,651 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:24:29,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-06 23:24:29,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:24:29,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:24:29,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 23:24:29,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:24:30,221 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 648 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:30,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:24:30,326 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 648 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:30,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998809772] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:24:30,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:24:30,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 62 [2021-12-06 23:24:30,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010146844] [2021-12-06 23:24:30,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:24:30,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-06 23:24:30,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:24:30,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-06 23:24:30,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=2917, Unknown=0, NotChecked=0, Total=3782 [2021-12-06 23:24:30,328 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 62 states, 62 states have (on average 3.193548387096774) internal successors, (198), 62 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:30,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:30,691 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2021-12-06 23:24:30,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 23:24:30,691 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.193548387096774) internal successors, (198), 62 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-12-06 23:24:30,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:30,692 INFO L225 Difference]: With dead ends: 200 [2021-12-06 23:24:30,692 INFO L226 Difference]: Without dead ends: 120 [2021-12-06 23:24:30,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2021-12-06 23:24:30,693 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 34 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:30,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 343 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:24:30,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-06 23:24:30,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-12-06 23:24:30,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:30,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2021-12-06 23:24:30,732 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2021-12-06 23:24:30,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:24:30,733 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2021-12-06 23:24:30,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.193548387096774) internal successors, (198), 62 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:30,733 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2021-12-06 23:24:30,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-06 23:24:30,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:30,733 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:30,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-12-06 23:24:30,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-06 23:24:30,934 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:30,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:30,934 INFO L85 PathProgramCache]: Analyzing trace with hash 453622553, now seen corresponding path program 45 times [2021-12-06 23:24:30,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:30,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617891189] [2021-12-06 23:24:30,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:30,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:30,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:31,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 1009 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:31,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:24:31,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617891189] [2021-12-06 23:24:31,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617891189] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:24:31,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491955994] [2021-12-06 23:24:31,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:24:31,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:31,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:24:31,498 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:24:31,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-06 23:24:32,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-12-06 23:24:32,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:24:32,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 23:24:32,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:24:32,854 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 15 treesize of output 11 [2021-12-06 23:24:34,563 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 23:24:34,563 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 44 treesize of output 23 [2021-12-06 23:24:34,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 630 proven. 379 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:34,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:24:36,500 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 18 treesize of output 16 [2021-12-06 23:24:36,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 23:24:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 612 proven. 397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:36,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491955994] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:24:36,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:24:36,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 107 [2021-12-06 23:24:36,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736897670] [2021-12-06 23:24:36,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:24:36,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-12-06 23:24:36,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:24:36,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-12-06 23:24:36,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1215, Invalid=10127, Unknown=0, NotChecked=0, Total=11342 [2021-12-06 23:24:36,543 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 107 states, 107 states have (on average 2.897196261682243) internal successors, (310), 107 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:38,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:38,914 INFO L93 Difference]: Finished difference Result 201 states and 203 transitions. [2021-12-06 23:24:38,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-06 23:24:38,914 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.897196261682243) internal successors, (310), 107 states have internal predecessors, (310), 0 states have call successors, (0), 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 118 [2021-12-06 23:24:38,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:38,915 INFO L225 Difference]: With dead ends: 201 [2021-12-06 23:24:38,915 INFO L226 Difference]: Without dead ends: 121 [2021-12-06 23:24:38,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4685 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2356, Invalid=24704, Unknown=0, NotChecked=0, Total=27060 [2021-12-06 23:24:38,916 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 42 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:38,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 1235 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 767 Invalid, 0 Unknown, 174 Unchecked, 0.2s Time] [2021-12-06 23:24:38,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-06 23:24:38,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-12-06 23:24:38,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:38,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2021-12-06 23:24:38,957 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2021-12-06 23:24:38,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:24:38,957 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2021-12-06 23:24:38,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.897196261682243) internal successors, (310), 107 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:38,957 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2021-12-06 23:24:38,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-06 23:24:38,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:38,958 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:38,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-12-06 23:24:39,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-06 23:24:39,159 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:39,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:39,160 INFO L85 PathProgramCache]: Analyzing trace with hash 79014647, now seen corresponding path program 46 times [2021-12-06 23:24:39,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:39,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407726988] [2021-12-06 23:24:39,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:39,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1048 backedges. 0 proven. 1048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:39,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:24:39,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407726988] [2021-12-06 23:24:39,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407726988] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:24:39,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556832169] [2021-12-06 23:24:39,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:24:39,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:39,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:24:39,770 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:24:39,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-06 23:24:40,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:24:40,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:24:40,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-06 23:24:40,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:24:40,544 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 [2021-12-06 23:24:40,577 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 23:24:40,577 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 25 treesize of output 24 [2021-12-06 23:24:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1048 backedges. 0 proven. 1046 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:24:41,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:24:41,814 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~x~0#1.offset|) 0) (+ 72 |c_ULTIMATE.start_main_~x~0#1.offset|)) 0)) is different from false [2021-12-06 23:24:41,821 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 23 treesize of output 21 [2021-12-06 23:24:41,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2021-12-06 23:24:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1048 backedges. 0 proven. 1009 refuted. 0 times theorem prover too weak. 0 trivial. 39 not checked. [2021-12-06 23:24:41,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556832169] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:24:41,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:24:41,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 42, 43] total 65 [2021-12-06 23:24:41,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353162045] [2021-12-06 23:24:41,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:24:41,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-06 23:24:41,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:24:41,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-06 23:24:41,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=3866, Unknown=1, NotChecked=124, Total=4160 [2021-12-06 23:24:41,897 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 65 states, 65 states have (on average 3.1076923076923078) internal successors, (202), 65 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:42,821 WARN L838 $PredicateComparison]: unable to prove that (and (<= 18 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~x~0#1.offset|) 0) (+ 72 |c_ULTIMATE.start_main_~x~0#1.offset|)) 0)) (<= |c_ULTIMATE.start_main_~i~0#1| 18) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~x~0#1.offset|)) 0)) is different from false [2021-12-06 23:24:43,306 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ 72 |c_ULTIMATE.start_main_~x~0#1.offset|)) 0) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~x~0#1.offset|) 0) (+ 72 |c_ULTIMATE.start_main_~x~0#1.offset|)) 0)) (not (= 72 (* 4 |c_ULTIMATE.start_main_~i~0#1|)))) is different from false [2021-12-06 23:24:44,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:44,162 INFO L93 Difference]: Finished difference Result 130 states and 131 transitions. [2021-12-06 23:24:44,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-06 23:24:44,163 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.1076923076923078) internal successors, (202), 65 states have internal predecessors, (202), 0 states have call successors, (0), 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 120 [2021-12-06 23:24:44,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:44,164 INFO L225 Difference]: With dead ends: 130 [2021-12-06 23:24:44,164 INFO L226 Difference]: Without dead ends: 128 [2021-12-06 23:24:44,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 213 SyntacticMatches, 6 SemanticMatches, 87 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=326, Invalid=6993, Unknown=3, NotChecked=510, Total=7832 [2021-12-06 23:24:44,165 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 74 mSDsluCounter, 1937 mSDsCounter, 0 mSdLazyCounter, 3897 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1982 SdHoareTripleChecker+Invalid, 4101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 3897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:44,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 1982 Invalid, 4101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 3897 Invalid, 0 Unknown, 124 Unchecked, 0.9s Time] [2021-12-06 23:24:44,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-06 23:24:44,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2021-12-06 23:24:44,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:44,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-12-06 23:24:44,210 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 120 [2021-12-06 23:24:44,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:24:44,210 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-12-06 23:24:44,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.1076923076923078) internal successors, (202), 65 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:44,211 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-12-06 23:24:44,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-06 23:24:44,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:44,211 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:44,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-12-06 23:24:44,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-06 23:24:44,412 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:44,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:44,413 INFO L85 PathProgramCache]: Analyzing trace with hash 341420045, now seen corresponding path program 47 times [2021-12-06 23:24:44,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:44,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334351366] [2021-12-06 23:24:44,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:44,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:45,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:45,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:24:45,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334351366] [2021-12-06 23:24:45,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334351366] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:24:45,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295176625] [2021-12-06 23:24:45,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:24:45,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:45,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:24:45,023 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:24:45,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-06 23:24:46,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-12-06 23:24:46,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:24:46,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-06 23:24:46,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:24:46,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 23:24:46,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:46,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:24:47,015 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 16 treesize of output 14 [2021-12-06 23:24:47,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 23:24:47,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:47,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295176625] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:24:47,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:24:47,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 66 [2021-12-06 23:24:47,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134773699] [2021-12-06 23:24:47,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:24:47,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-06 23:24:47,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:24:47,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-06 23:24:47,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=4118, Unknown=0, NotChecked=0, Total=4290 [2021-12-06 23:24:47,094 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 66 states, 66 states have (on average 3.1363636363636362) internal successors, (207), 66 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:48,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:48,510 INFO L93 Difference]: Finished difference Result 135 states and 136 transitions. [2021-12-06 23:24:48,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-06 23:24:48,510 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.1363636363636362) internal successors, (207), 66 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-12-06 23:24:48,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:48,511 INFO L225 Difference]: With dead ends: 135 [2021-12-06 23:24:48,511 INFO L226 Difference]: Without dead ends: 133 [2021-12-06 23:24:48,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 222 SyntacticMatches, 5 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=332, Invalid=7500, Unknown=0, NotChecked=0, Total=7832 [2021-12-06 23:24:48,511 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 73 mSDsluCounter, 2054 mSDsCounter, 0 mSdLazyCounter, 4390 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 2100 SdHoareTripleChecker+Invalid, 4473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 4390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:48,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 2100 Invalid, 4473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 4390 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 23:24:48,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-06 23:24:48,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2021-12-06 23:24:48,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:48,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2021-12-06 23:24:48,553 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2021-12-06 23:24:48,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:24:48,554 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2021-12-06 23:24:48,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.1363636363636362) internal successors, (207), 66 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:48,554 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2021-12-06 23:24:48,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-06 23:24:48,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:48,554 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:48,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-12-06 23:24:48,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-06 23:24:48,756 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:48,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:48,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1997723101, now seen corresponding path program 48 times [2021-12-06 23:24:48,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:48,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246112843] [2021-12-06 23:24:48,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:48,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:49,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 723 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:49,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:24:49,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246112843] [2021-12-06 23:24:49,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246112843] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:24:49,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780821821] [2021-12-06 23:24:49,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 23:24:49,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:49,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:24:49,116 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:24:49,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-06 23:24:51,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-12-06 23:24:51,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:24:51,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 23:24:51,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:24:51,480 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 [2021-12-06 23:24:52,755 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 23:24:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 800 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:52,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:24:54,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2021-12-06 23:24:54,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 30 [2021-12-06 23:24:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 684 proven. 516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:54,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780821821] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:24:54,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:24:54,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46, 47] total 95 [2021-12-06 23:24:54,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204812973] [2021-12-06 23:24:54,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:24:54,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-12-06 23:24:54,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:24:54,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-12-06 23:24:54,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1799, Invalid=7131, Unknown=0, NotChecked=0, Total=8930 [2021-12-06 23:24:54,116 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 95 states, 95 states have (on average 3.1894736842105265) internal successors, (303), 95 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:55,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:55,584 INFO L93 Difference]: Finished difference Result 306 states and 310 transitions. [2021-12-06 23:24:55,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-12-06 23:24:55,584 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.1894736842105265) internal successors, (303), 95 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-12-06 23:24:55,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:55,585 INFO L225 Difference]: With dead ends: 306 [2021-12-06 23:24:55,585 INFO L226 Difference]: Without dead ends: 133 [2021-12-06 23:24:55,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6909 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3218, Invalid=17374, Unknown=0, NotChecked=0, Total=20592 [2021-12-06 23:24:55,586 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 21 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:55,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 850 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 88 Invalid, 0 Unknown, 129 Unchecked, 0.0s Time] [2021-12-06 23:24:55,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-06 23:24:55,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-12-06 23:24:55,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:55,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2021-12-06 23:24:55,630 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 128 [2021-12-06 23:24:55,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:24:55,630 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2021-12-06 23:24:55,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.1894736842105265) internal successors, (303), 95 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:55,630 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2021-12-06 23:24:55,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-06 23:24:55,631 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:55,631 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:55,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-12-06 23:24:55,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-12-06 23:24:55,832 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:55,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:55,833 INFO L85 PathProgramCache]: Analyzing trace with hash 602566495, now seen corresponding path program 49 times [2021-12-06 23:24:55,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:55,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325414877] [2021-12-06 23:24:55,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:55,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:55,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1284 backedges. 0 proven. 1284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:56,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:24:56,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325414877] [2021-12-06 23:24:56,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325414877] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:24:56,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212326278] [2021-12-06 23:24:56,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 23:24:56,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:56,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:24:56,612 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:24:56,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-06 23:24:56,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:56,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-06 23:24:56,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:24:56,807 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 [2021-12-06 23:24:56,868 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 23:24:56,868 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 27 treesize of output 26 [2021-12-06 23:24:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1284 backedges. 0 proven. 1284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:57,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:24:57,872 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 16 treesize of output 14 [2021-12-06 23:24:57,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 23:24:57,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1284 backedges. 0 proven. 1284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:57,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212326278] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:24:57,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:24:57,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 72 [2021-12-06 23:24:57,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735907039] [2021-12-06 23:24:57,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:24:57,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-06 23:24:57,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:24:57,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-06 23:24:57,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=4920, Unknown=0, NotChecked=0, Total=5112 [2021-12-06 23:24:57,964 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 72 states, 72 states have (on average 3.0694444444444446) internal successors, (221), 72 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:59,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:59,578 INFO L93 Difference]: Finished difference Result 223 states and 225 transitions. [2021-12-06 23:24:59,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-06 23:24:59,578 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.0694444444444446) internal successors, (221), 72 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-12-06 23:24:59,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:59,579 INFO L225 Difference]: With dead ends: 223 [2021-12-06 23:24:59,579 INFO L226 Difference]: Without dead ends: 221 [2021-12-06 23:24:59,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 234 SyntacticMatches, 6 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=326, Invalid=8416, Unknown=0, NotChecked=0, Total=8742 [2021-12-06 23:24:59,580 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 54 mSDsluCounter, 2437 mSDsCounter, 0 mSdLazyCounter, 4750 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 2486 SdHoareTripleChecker+Invalid, 4871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 4750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:59,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 2486 Invalid, 4871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 4750 Invalid, 0 Unknown, 73 Unchecked, 1.2s Time] [2021-12-06 23:24:59,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-06 23:24:59,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 140. [2021-12-06 23:24:59,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.0215827338129497) internal successors, (142), 139 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:59,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2021-12-06 23:24:59,631 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 132 [2021-12-06 23:24:59,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:24:59,632 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2021-12-06 23:24:59,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.0694444444444446) internal successors, (221), 72 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:59,632 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2021-12-06 23:24:59,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-06 23:24:59,632 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:59,632 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:59,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-12-06 23:24:59,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:59,833 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:59,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:59,834 INFO L85 PathProgramCache]: Analyzing trace with hash 181289661, now seen corresponding path program 50 times [2021-12-06 23:24:59,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:59,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059613123] [2021-12-06 23:24:59,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:59,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:59,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:00,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 0 proven. 1329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:00,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:25:00,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059613123] [2021-12-06 23:25:00,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059613123] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:25:00,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164502739] [2021-12-06 23:25:00,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:25:00,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:25:00,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:25:00,643 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:25:00,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-06 23:25:00,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:25:00,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:25:00,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 101 conjunts are in the unsatisfiable core [2021-12-06 23:25:00,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:00,848 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 [2021-12-06 23:25:00,887 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 23:25:00,887 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 25 treesize of output 24 [2021-12-06 23:25:00,989 INFO L354 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2021-12-06 23:25:00,990 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 36 treesize of output 38 [2021-12-06 23:25:02,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 1 proven. 1328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:02,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:25:03,348 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_1144| Int)) (or (and (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_1144| 4) |c_ULTIMATE.start_main_~x~0#1.offset|) 0) (+ |c_ULTIMATE.start_main_~x~0#1.offset| 80)) 0) (< 19 |v_ULTIMATE.start_main_~i~0#1_1144|)) (< |v_ULTIMATE.start_main_~i~0#1_1144| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-06 23:25:03,355 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 27 treesize of output 25 [2021-12-06 23:25:03,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2021-12-06 23:25:03,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 0 proven. 1307 refuted. 0 times theorem prover too weak. 0 trivial. 22 not checked. [2021-12-06 23:25:03,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164502739] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:25:03,457 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:25:03,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50, 50] total 78 [2021-12-06 23:25:03,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394435832] [2021-12-06 23:25:03,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:25:03,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-12-06 23:25:03,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:25:03,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-12-06 23:25:03,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=5610, Unknown=1, NotChecked=150, Total=6006 [2021-12-06 23:25:03,458 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand has 78 states, 78 states have (on average 2.9743589743589745) internal successors, (232), 78 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:04,394 WARN L838 $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_main_~i~0#1| 20) (<= 20 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_1144| Int)) (or (and (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_1144| 4) |c_ULTIMATE.start_main_~x~0#1.offset|) 0) (+ |c_ULTIMATE.start_main_~x~0#1.offset| 80)) 0) (< 19 |v_ULTIMATE.start_main_~i~0#1_1144|)) (< |v_ULTIMATE.start_main_~i~0#1_1144| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~x~0#1.offset|)) 0)) is different from false [2021-12-06 23:25:04,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:04,533 INFO L93 Difference]: Finished difference Result 227 states and 229 transitions. [2021-12-06 23:25:04,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-06 23:25:04,533 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.9743589743589745) internal successors, (232), 78 states have internal predecessors, (232), 0 states have call successors, (0), 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 134 [2021-12-06 23:25:04,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:04,534 INFO L225 Difference]: With dead ends: 227 [2021-12-06 23:25:04,534 INFO L226 Difference]: Without dead ends: 225 [2021-12-06 23:25:04,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 234 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=247, Invalid=5611, Unknown=2, NotChecked=302, Total=6162 [2021-12-06 23:25:04,535 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 44 mSDsluCounter, 2512 mSDsCounter, 0 mSdLazyCounter, 2021 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 2561 SdHoareTripleChecker+Invalid, 2446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 418 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:04,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 2561 Invalid, 2446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2021 Invalid, 0 Unknown, 418 Unchecked, 0.5s Time] [2021-12-06 23:25:04,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-12-06 23:25:04,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 137. [2021-12-06 23:25:04,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:04,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2021-12-06 23:25:04,589 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2021-12-06 23:25:04,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:04,589 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2021-12-06 23:25:04,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.9743589743589745) internal successors, (232), 78 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:04,589 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2021-12-06 23:25:04,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-06 23:25:04,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:04,590 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:04,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-12-06 23:25:04,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:25:04,791 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:04,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:04,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1229322357, now seen corresponding path program 51 times [2021-12-06 23:25:04,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:04,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402992787] [2021-12-06 23:25:04,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:04,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:25:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:05,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 0 proven. 1366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:05,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:25:05,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402992787] [2021-12-06 23:25:05,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402992787] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:25:05,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513655630] [2021-12-06 23:25:05,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:25:05,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:25:05,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:25:05,574 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:25:05,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-06 23:25:06,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-12-06 23:25:06,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:25:06,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 23:25:06,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:07,251 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 [2021-12-06 23:25:09,327 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 23:25:09,328 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 44 treesize of output 23 [2021-12-06 23:25:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 861 proven. 505 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:09,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:25:11,854 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 18 treesize of output 16 [2021-12-06 23:25:11,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 23:25:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 840 proven. 526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:11,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513655630] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:25:11,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:25:11,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50, 50] total 122 [2021-12-06 23:25:11,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488189527] [2021-12-06 23:25:11,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:25:11,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2021-12-06 23:25:11,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:25:11,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-12-06 23:25:11,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1566, Invalid=13196, Unknown=0, NotChecked=0, Total=14762 [2021-12-06 23:25:11,900 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 122 states, 122 states have (on average 2.9344262295081966) internal successors, (358), 122 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:14,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:14,795 INFO L93 Difference]: Finished difference Result 231 states and 233 transitions. [2021-12-06 23:25:14,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-06 23:25:14,796 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.9344262295081966) internal successors, (358), 122 states have internal predecessors, (358), 0 states have call successors, (0), 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 136 [2021-12-06 23:25:14,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:14,797 INFO L225 Difference]: With dead ends: 231 [2021-12-06 23:25:14,797 INFO L226 Difference]: Without dead ends: 139 [2021-12-06 23:25:14,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6110 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=3019, Invalid=32513, Unknown=0, NotChecked=0, Total=35532 [2021-12-06 23:25:14,798 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 90 mSDsluCounter, 1506 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 1554 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:14,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 1554 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 752 Invalid, 0 Unknown, 150 Unchecked, 0.2s Time] [2021-12-06 23:25:14,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-06 23:25:14,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-12-06 23:25:14,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0144927536231885) internal successors, (140), 138 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:14,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2021-12-06 23:25:14,854 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2021-12-06 23:25:14,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:14,854 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2021-12-06 23:25:14,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.9344262295081966) internal successors, (358), 122 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:14,854 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2021-12-06 23:25:14,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-06 23:25:14,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:14,855 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:14,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-12-06 23:25:15,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-12-06 23:25:15,056 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:15,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:15,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1456149293, now seen corresponding path program 52 times [2021-12-06 23:25:15,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:15,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753367332] [2021-12-06 23:25:15,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:15,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:25:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1411 backedges. 0 proven. 1411 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:15,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:25:15,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753367332] [2021-12-06 23:25:15,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753367332] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:25:15,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797355457] [2021-12-06 23:25:15,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:25:15,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:25:15,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:25:15,826 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:25:15,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-12-06 23:25:18,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:25:18,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:25:18,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-06 23:25:18,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:19,035 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 [2021-12-06 23:25:19,139 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 23:25:19,139 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 27 treesize of output 26 [2021-12-06 23:25:29,080 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-12-06 23:25:29,081 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 55 treesize of output 26 [2021-12-06 23:25:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1411 backedges. 861 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:29,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:25:40,662 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 26 treesize of output 24 [2021-12-06 23:25:40,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 57 [2021-12-06 23:25:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1411 backedges. 366 proven. 1043 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:40,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797355457] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:25:40,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:25:40,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 52, 52] total 127 [2021-12-06 23:25:40,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377091728] [2021-12-06 23:25:40,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:25:40,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2021-12-06 23:25:40,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:25:40,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-12-06 23:25:40,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1573, Invalid=14415, Unknown=14, NotChecked=0, Total=16002 [2021-12-06 23:25:40,709 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand has 127 states, 127 states have (on average 2.8661417322834644) internal successors, (364), 127 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:51,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:51,666 INFO L93 Difference]: Finished difference Result 233 states and 236 transitions. [2021-12-06 23:25:51,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-12-06 23:25:51,667 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.8661417322834644) internal successors, (364), 127 states have internal predecessors, (364), 0 states have call successors, (0), 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 138 [2021-12-06 23:25:51,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:51,667 INFO L225 Difference]: With dead ends: 233 [2021-12-06 23:25:51,667 INFO L226 Difference]: Without dead ends: 0 [2021-12-06 23:25:51,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7666 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=3498, Invalid=38308, Unknown=14, NotChecked=0, Total=41820 [2021-12-06 23:25:51,669 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 97 mSDsluCounter, 1984 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 2031 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:51,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 2031 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1074 Invalid, 0 Unknown, 281 Unchecked, 0.3s Time] [2021-12-06 23:25:51,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-06 23:25:51,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-06 23:25:51,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:51,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-06 23:25:51,669 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 138 [2021-12-06 23:25:51,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:51,669 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-06 23:25:51,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.8661417322834644) internal successors, (364), 127 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:51,670 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-06 23:25:51,670 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-06 23:25:51,671 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-06 23:25:51,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-12-06 23:25:51,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec48d49-2897-419e-8631-187f9d60835f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-12-06 23:25:51,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.