./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c --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_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/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_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/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_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/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 2409cd2f018515417b0b6bf5d396e4bc80c02540769112137ebf388167bdf776 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:28:42,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:28:42,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:28:42,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:28:42,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:28:42,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:28:42,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:28:42,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:28:42,135 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:28:42,136 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:28:42,138 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:28:42,139 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:28:42,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:28:42,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:28:42,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:28:42,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:28:42,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:28:42,146 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:28:42,148 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:28:42,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:28:42,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:28:42,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:28:42,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:28:42,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:28:42,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:28:42,160 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:28:42,160 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:28:42,161 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:28:42,162 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:28:42,163 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:28:42,163 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:28:42,164 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:28:42,165 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:28:42,166 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:28:42,167 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:28:42,167 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:28:42,168 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:28:42,168 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:28:42,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:28:42,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:28:42,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:28:42,170 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 20:28:42,194 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:28:42,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:28:42,194 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:28:42,194 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:28:42,195 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:28:42,195 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:28:42,196 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:28:42,196 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:28:42,196 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:28:42,197 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:28:42,197 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:28:42,197 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:28:42,197 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:28:42,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:28:42,198 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 20:28:42,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:28:42,198 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 20:28:42,198 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:28:42,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 20:28:42,199 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:28:42,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 20:28:42,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:28:42,199 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:28:42,199 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:28:42,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:28:42,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:28:42,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:28:42,200 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 20:28:42,200 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 20:28:42,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 20:28:42,201 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 20:28:42,201 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 20:28:42,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 20:28:42,201 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:28:42,202 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_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2409cd2f018515417b0b6bf5d396e4bc80c02540769112137ebf388167bdf776 [2021-12-06 20:28:42,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:28:42,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:28:42,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:28:42,389 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:28:42,389 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:28:42,390 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c [2021-12-06 20:28:42,435 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/data/afce3ea87/f93aa4e8e1aa4e57b21804d83bc539f9/FLAG63e0337f3 [2021-12-06 20:28:42,797 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:28:42,797 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c [2021-12-06 20:28:42,802 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/data/afce3ea87/f93aa4e8e1aa4e57b21804d83bc539f9/FLAG63e0337f3 [2021-12-06 20:28:42,811 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/data/afce3ea87/f93aa4e8e1aa4e57b21804d83bc539f9 [2021-12-06 20:28:42,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:28:42,814 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:28:42,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:28:42,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:28:42,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:28:42,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:28:42" (1/1) ... [2021-12-06 20:28:42,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d25d145 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:28:42, skipping insertion in model container [2021-12-06 20:28:42,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:28:42" (1/1) ... [2021-12-06 20:28:42,823 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:28:42,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:28:42,937 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_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c[454,467] [2021-12-06 20:28:42,939 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:28:42,945 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:28:42,955 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_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c[454,467] [2021-12-06 20:28:42,955 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:28:42,964 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:28:42,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:28:42 WrapperNode [2021-12-06 20:28:42,965 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:28:42,965 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:28:42,965 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:28:42,966 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:28:42,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:28:42" (1/1) ... [2021-12-06 20:28:42,975 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:28:42" (1/1) ... [2021-12-06 20:28:42,986 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2021-12-06 20:28:42,986 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:28:42,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:28:42,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:28:42,987 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:28:42,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:28:42" (1/1) ... [2021-12-06 20:28:42,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:28:42" (1/1) ... [2021-12-06 20:28:42,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:28:42" (1/1) ... [2021-12-06 20:28:42,994 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:28:42" (1/1) ... [2021-12-06 20:28:42,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:28:42" (1/1) ... [2021-12-06 20:28:42,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:28:42" (1/1) ... [2021-12-06 20:28:42,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:28:42" (1/1) ... [2021-12-06 20:28:42,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:28:42,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:28:42,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:28:42,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:28:43,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:28:42" (1/1) ... [2021-12-06 20:28:43,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:28:43,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:28:43,022 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:28:43,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:28:43,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 20:28:43,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:28:43,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:28:43,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 20:28:43,052 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-12-06 20:28:43,052 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-12-06 20:28:43,100 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:28:43,101 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:28:43,155 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:28:43,159 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:28:43,159 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-06 20:28:43,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:28:43 BoogieIcfgContainer [2021-12-06 20:28:43,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:28:43,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:28:43,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:28:43,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:28:43,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:28:42" (1/3) ... [2021-12-06 20:28:43,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15696cd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:28:43, skipping insertion in model container [2021-12-06 20:28:43,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:28:42" (2/3) ... [2021-12-06 20:28:43,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15696cd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:28:43, skipping insertion in model container [2021-12-06 20:28:43,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:28:43" (3/3) ... [2021-12-06 20:28:43,168 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i25_o25-1.c [2021-12-06 20:28:43,174 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:28:43,174 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 20:28:43,215 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:28:43,221 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 20:28:43,221 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 20:28:43,235 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 20:28:43,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 20:28:43,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:28:43,240 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:28:43,241 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:28:43,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:28:43,246 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-12-06 20:28:43,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:28:43,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897932106] [2021-12-06 20:28:43,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:28:43,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:28:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:43,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:43,411 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 20:28:43,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:28:43,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897932106] [2021-12-06 20:28:43,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897932106] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:28:43,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:28:43,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:28:43,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116652219] [2021-12-06 20:28:43,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:28:43,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:28:43,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:28:43,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:28:43,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:28:43,452 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 20:28:43,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:28:43,501 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-12-06 20:28:43,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:28:43,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-12-06 20:28:43,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:28:43,512 INFO L225 Difference]: With dead ends: 25 [2021-12-06 20:28:43,512 INFO L226 Difference]: Without dead ends: 15 [2021-12-06 20:28:43,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:28:43,519 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:28:43,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:28:43,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-06 20:28:43,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-12-06 20:28:43,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 20:28:43,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-12-06 20:28:43,551 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-12-06 20:28:43,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:28:43,551 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-12-06 20:28:43,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 20:28:43,552 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-12-06 20:28:43,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 20:28:43,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:28:43,553 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:28:43,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 20:28:43,554 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:28:43,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:28:43,555 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-12-06 20:28:43,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:28:43,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662352098] [2021-12-06 20:28:43,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:28:43,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:28:43,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:43,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:43,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:43,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:28:43,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:28:43,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662352098] [2021-12-06 20:28:43,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662352098] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:28:43,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273216780] [2021-12-06 20:28:43,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:28:43,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:28:43,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:28:43,648 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:28:43,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 20:28:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:43,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 20:28:43,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:28:43,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:28:43,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:28:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:28:43,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273216780] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:28:43,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:28:43,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 11 [2021-12-06 20:28:43,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263293064] [2021-12-06 20:28:43,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:28:43,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 20:28:43,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:28:43,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 20:28:43,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-06 20:28:43,908 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 20:28:43,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:28:43,941 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-12-06 20:28:43,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:28:43,941 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 16 [2021-12-06 20:28:43,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:28:43,942 INFO L225 Difference]: With dead ends: 22 [2021-12-06 20:28:43,942 INFO L226 Difference]: Without dead ends: 18 [2021-12-06 20:28:43,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-06 20:28:43,944 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:28:43,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 36 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:28:43,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-06 20:28:43,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-06 20:28:43,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 20:28:43,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-12-06 20:28:43,949 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-12-06 20:28:43,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:28:43,949 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-12-06 20:28:43,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 20:28:43,949 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-12-06 20:28:43,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 20:28:43,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:28:43,950 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:28:43,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 20:28:44,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:28:44,153 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:28:44,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:28:44,155 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-12-06 20:28:44,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:28:44,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423365219] [2021-12-06 20:28:44,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:28:44,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:28:44,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:44,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:44,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:44,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:44,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:44,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 20:28:44,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:28:44,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423365219] [2021-12-06 20:28:44,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423365219] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:28:44,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930237683] [2021-12-06 20:28:44,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:28:44,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:28:44,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:28:44,362 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:28:44,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 20:28:44,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:28:44,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:28:44,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 20:28:44,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:28:44,430 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 20:28:44,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:28:44,611 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 20:28:44,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930237683] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:28:44,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:28:44,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 13 [2021-12-06 20:28:44,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374589070] [2021-12-06 20:28:44,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:28:44,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 20:28:44,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:28:44,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 20:28:44,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-12-06 20:28:44,614 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-06 20:28:44,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:28:44,642 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-12-06 20:28:44,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 20:28:44,642 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 22 [2021-12-06 20:28:44,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:28:44,643 INFO L225 Difference]: With dead ends: 25 [2021-12-06 20:28:44,643 INFO L226 Difference]: Without dead ends: 21 [2021-12-06 20:28:44,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-12-06 20:28:44,645 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:28:44,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 48 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:28:44,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-06 20:28:44,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-06 20:28:44,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:28:44,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-12-06 20:28:44,651 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2021-12-06 20:28:44,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:28:44,652 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-12-06 20:28:44,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-06 20:28:44,652 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-12-06 20:28:44,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 20:28:44,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:28:44,653 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:28:44,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 20:28:44,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-06 20:28:44,855 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:28:44,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:28:44,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2021-12-06 20:28:44,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:28:44,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655161436] [2021-12-06 20:28:44,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:28:44,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:28:44,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:44,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:44,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:44,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:44,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:44,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:44,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 20:28:44,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:28:44,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655161436] [2021-12-06 20:28:44,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655161436] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:28:44,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316835736] [2021-12-06 20:28:44,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:28:44,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:28:44,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:28:45,000 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:28:45,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 20:28:45,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 20:28:45,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:28:45,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 20:28:45,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:28:45,078 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 20:28:45,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:28:45,326 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 20:28:45,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316835736] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:28:45,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:28:45,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 15 [2021-12-06 20:28:45,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630635754] [2021-12-06 20:28:45,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:28:45,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 20:28:45,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:28:45,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 20:28:45,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-12-06 20:28:45,329 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2021-12-06 20:28:45,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:28:45,364 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-12-06 20:28:45,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 20:28:45,364 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) Word has length 28 [2021-12-06 20:28:45,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:28:45,365 INFO L225 Difference]: With dead ends: 28 [2021-12-06 20:28:45,365 INFO L226 Difference]: Without dead ends: 24 [2021-12-06 20:28:45,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-12-06 20:28:45,366 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:28:45,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 48 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:28:45,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-06 20:28:45,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-06 20:28:45,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 20:28:45,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-12-06 20:28:45,370 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2021-12-06 20:28:45,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:28:45,370 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-12-06 20:28:45,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2021-12-06 20:28:45,371 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-12-06 20:28:45,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 20:28:45,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:28:45,372 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:28:45,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 20:28:45,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:28:45,574 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:28:45,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:28:45,575 INFO L85 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2021-12-06 20:28:45,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:28:45,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152286969] [2021-12-06 20:28:45,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:28:45,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:28:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:45,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:45,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:45,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:45,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:45,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:45,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:45,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:45,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 20:28:45,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:28:45,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152286969] [2021-12-06 20:28:45,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152286969] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:28:45,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439503026] [2021-12-06 20:28:45,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:28:45,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:28:45,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:28:45,713 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:28:45,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 20:28:45,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:28:45,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:28:45,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 20:28:45,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:28:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 20:28:45,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:28:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 20:28:46,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439503026] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:28:46,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:28:46,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 17 [2021-12-06 20:28:46,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552489967] [2021-12-06 20:28:46,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:28:46,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 20:28:46,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:28:46,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 20:28:46,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-12-06 20:28:46,192 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-06 20:28:46,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:28:46,236 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-12-06 20:28:46,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 20:28:46,237 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) Word has length 34 [2021-12-06 20:28:46,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:28:46,238 INFO L225 Difference]: With dead ends: 31 [2021-12-06 20:28:46,238 INFO L226 Difference]: Without dead ends: 27 [2021-12-06 20:28:46,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2021-12-06 20:28:46,239 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:28:46,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 65 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:28:46,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-06 20:28:46,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-06 20:28:46,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 20:28:46,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-12-06 20:28:46,243 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2021-12-06 20:28:46,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:28:46,243 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-12-06 20:28:46,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-06 20:28:46,244 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-12-06 20:28:46,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 20:28:46,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:28:46,245 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:28:46,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 20:28:46,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:28:46,447 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:28:46,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:28:46,448 INFO L85 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2021-12-06 20:28:46,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:28:46,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633806881] [2021-12-06 20:28:46,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:28:46,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:28:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:46,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:46,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:46,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:46,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:46,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:46,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:46,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:46,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:46,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:46,640 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 20:28:46,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:28:46,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633806881] [2021-12-06 20:28:46,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633806881] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:28:46,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471974372] [2021-12-06 20:28:46,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:28:46,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:28:46,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:28:46,642 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:28:46,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 20:28:46,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-06 20:28:46,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:28:46,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 20:28:46,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:28:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 20:28:46,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:28:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 20:28:47,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471974372] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:28:47,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:28:47,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 19 [2021-12-06 20:28:47,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882608073] [2021-12-06 20:28:47,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:28:47,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 20:28:47,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:28:47,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 20:28:47,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-12-06 20:28:47,326 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2021-12-06 20:28:47,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:28:47,380 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-12-06 20:28:47,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 20:28:47,381 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 40 [2021-12-06 20:28:47,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:28:47,381 INFO L225 Difference]: With dead ends: 34 [2021-12-06 20:28:47,381 INFO L226 Difference]: Without dead ends: 30 [2021-12-06 20:28:47,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2021-12-06 20:28:47,383 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:28:47,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 74 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:28:47,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-06 20:28:47,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-06 20:28:47,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 20:28:47,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-12-06 20:28:47,387 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2021-12-06 20:28:47,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:28:47,387 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-12-06 20:28:47,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2021-12-06 20:28:47,388 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-12-06 20:28:47,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 20:28:47,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:28:47,389 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:28:47,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 20:28:47,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 20:28:47,590 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:28:47,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:28:47,591 INFO L85 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2021-12-06 20:28:47,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:28:47,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74133134] [2021-12-06 20:28:47,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:28:47,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:28:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:47,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:47,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:47,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:47,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:47,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:47,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:47,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:47,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:47,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-06 20:28:47,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:28:47,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74133134] [2021-12-06 20:28:47,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74133134] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:28:47,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86217972] [2021-12-06 20:28:47,800 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:28:47,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:28:47,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:28:47,800 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:28:47,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 20:28:47,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-06 20:28:47,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:28:47,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 20:28:47,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:28:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-06 20:28:47,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:28:48,617 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 20:28:48,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86217972] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:28:48,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:28:48,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 21 [2021-12-06 20:28:48,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950971546] [2021-12-06 20:28:48,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:28:48,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 20:28:48,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:28:48,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 20:28:48,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-12-06 20:28:48,619 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-06 20:28:48,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:28:48,680 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-12-06 20:28:48,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 20:28:48,680 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) Word has length 46 [2021-12-06 20:28:48,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:28:48,681 INFO L225 Difference]: With dead ends: 37 [2021-12-06 20:28:48,681 INFO L226 Difference]: Without dead ends: 33 [2021-12-06 20:28:48,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2021-12-06 20:28:48,683 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 83 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:28:48,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 69 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:28:48,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-06 20:28:48,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-06 20:28:48,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 20:28:48,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-12-06 20:28:48,689 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2021-12-06 20:28:48,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:28:48,689 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-12-06 20:28:48,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-06 20:28:48,690 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-12-06 20:28:48,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 20:28:48,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:28:48,691 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:28:48,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-06 20:28:48,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 20:28:48,893 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:28:48,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:28:48,894 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2021-12-06 20:28:48,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:28:48,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555434768] [2021-12-06 20:28:48,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:28:48,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:28:48,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:48,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:48,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:48,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:48,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:48,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:48,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:49,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:49,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:49,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:49,033 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-06 20:28:49,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:28:49,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555434768] [2021-12-06 20:28:49,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555434768] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:28:49,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816071631] [2021-12-06 20:28:49,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:28:49,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:28:49,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:28:49,035 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:28:49,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 20:28:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:49,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 20:28:49,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:28:49,150 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-06 20:28:49,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:28:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 20:28:50,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816071631] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:28:50,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:28:50,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 23 [2021-12-06 20:28:50,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521546191] [2021-12-06 20:28:50,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:28:50,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 20:28:50,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:28:50,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 20:28:50,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2021-12-06 20:28:50,168 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2021-12-06 20:28:50,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:28:50,213 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-12-06 20:28:50,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 20:28:50,214 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 52 [2021-12-06 20:28:50,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:28:50,215 INFO L225 Difference]: With dead ends: 40 [2021-12-06 20:28:50,215 INFO L226 Difference]: Without dead ends: 36 [2021-12-06 20:28:50,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=302, Invalid=628, Unknown=0, NotChecked=0, Total=930 [2021-12-06 20:28:50,216 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:28:50,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 78 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:28:50,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-06 20:28:50,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-12-06 20:28:50,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-06 20:28:50,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-12-06 20:28:50,220 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2021-12-06 20:28:50,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:28:50,220 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-12-06 20:28:50,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2021-12-06 20:28:50,221 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-12-06 20:28:50,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 20:28:50,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:28:50,222 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:28:50,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 20:28:50,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:28:50,423 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:28:50,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:28:50,425 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2021-12-06 20:28:50,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:28:50,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605661206] [2021-12-06 20:28:50,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:28:50,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:28:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:50,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:50,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:50,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:50,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:50,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:50,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:50,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:50,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:50,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:50,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:50,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:50,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-06 20:28:50,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:28:50,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605661206] [2021-12-06 20:28:50,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605661206] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:28:50,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707342730] [2021-12-06 20:28:50,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:28:50,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:28:50,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:28:50,612 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:28:50,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 20:28:50,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:28:50,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:28:50,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 20:28:50,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:28:50,753 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-06 20:28:50,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:28:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 20:28:52,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707342730] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:28:52,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:28:52,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 25 [2021-12-06 20:28:52,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389935252] [2021-12-06 20:28:52,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:28:52,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 20:28:52,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:28:52,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 20:28:52,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-12-06 20:28:52,113 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2021-12-06 20:28:52,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:28:52,176 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-12-06 20:28:52,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 20:28:52,177 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) Word has length 58 [2021-12-06 20:28:52,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:28:52,177 INFO L225 Difference]: With dead ends: 43 [2021-12-06 20:28:52,177 INFO L226 Difference]: Without dead ends: 39 [2021-12-06 20:28:52,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=365, Invalid=757, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 20:28:52,179 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 47 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:28:52,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 88 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:28:52,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-06 20:28:52,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-12-06 20:28:52,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 20:28:52,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-12-06 20:28:52,183 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2021-12-06 20:28:52,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:28:52,183 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-12-06 20:28:52,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2021-12-06 20:28:52,183 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-12-06 20:28:52,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 20:28:52,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:28:52,184 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:28:52,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 20:28:52,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:28:52,386 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:28:52,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:28:52,387 INFO L85 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2021-12-06 20:28:52,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:28:52,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506844573] [2021-12-06 20:28:52,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:28:52,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:28:52,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:52,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:52,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:52,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:52,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:52,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:52,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:52,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:52,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:52,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:52,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:52,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:52,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:52,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:52,581 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-06 20:28:52,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:28:52,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506844573] [2021-12-06 20:28:52,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506844573] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:28:52,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459468984] [2021-12-06 20:28:52,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:28:52,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:28:52,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:28:52,583 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:28:52,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 20:28:52,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-06 20:28:52,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:28:52,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 20:28:52,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:28:52,756 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-06 20:28:52,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:28:54,484 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 20:28:54,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459468984] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:28:54,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:28:54,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 27 [2021-12-06 20:28:54,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042305929] [2021-12-06 20:28:54,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:28:54,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 20:28:54,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:28:54,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 20:28:54,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2021-12-06 20:28:54,486 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 27 states, 25 states have (on average 2.08) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2021-12-06 20:28:54,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:28:54,556 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-12-06 20:28:54,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 20:28:54,556 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.08) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) Word has length 64 [2021-12-06 20:28:54,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:28:54,557 INFO L225 Difference]: With dead ends: 46 [2021-12-06 20:28:54,557 INFO L226 Difference]: Without dead ends: 42 [2021-12-06 20:28:54,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=434, Invalid=898, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 20:28:54,559 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 136 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:28:54,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 85 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:28:54,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-06 20:28:54,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-06 20:28:54,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 20:28:54,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-12-06 20:28:54,565 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2021-12-06 20:28:54,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:28:54,565 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-12-06 20:28:54,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.08) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2021-12-06 20:28:54,565 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-12-06 20:28:54,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 20:28:54,566 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:28:54,566 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:28:54,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 20:28:54,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 20:28:54,768 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:28:54,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:28:54,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2021-12-06 20:28:54,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:28:54,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414496308] [2021-12-06 20:28:54,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:28:54,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:28:54,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:54,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:54,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:54,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:54,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:54,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:54,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:54,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:54,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:54,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:54,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:54,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:54,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:54,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:54,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:54,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:54,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:54,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:54,975 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-06 20:28:54,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:28:54,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414496308] [2021-12-06 20:28:54,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414496308] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:28:54,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956340492] [2021-12-06 20:28:54,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:28:54,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:28:54,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:28:54,976 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:28:54,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 20:28:55,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:28:55,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:28:55,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 20:28:55,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:28:55,178 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-06 20:28:55,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:28:57,609 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-06 20:28:57,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956340492] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:28:57,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:28:57,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 29 [2021-12-06 20:28:57,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604528189] [2021-12-06 20:28:57,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:28:57,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 20:28:57,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:28:57,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 20:28:57,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=590, Unknown=0, NotChecked=0, Total=812 [2021-12-06 20:28:57,611 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2021-12-06 20:28:57,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:28:57,688 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-12-06 20:28:57,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 20:28:57,688 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) Word has length 70 [2021-12-06 20:28:57,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:28:57,689 INFO L225 Difference]: With dead ends: 49 [2021-12-06 20:28:57,689 INFO L226 Difference]: Without dead ends: 45 [2021-12-06 20:28:57,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=509, Invalid=1051, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 20:28:57,691 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 76 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:28:57,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 99 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:28:57,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-06 20:28:57,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-12-06 20:28:57,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 20:28:57,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-12-06 20:28:57,695 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2021-12-06 20:28:57,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:28:57,695 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-12-06 20:28:57,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2021-12-06 20:28:57,695 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-12-06 20:28:57,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 20:28:57,696 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:28:57,696 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:28:57,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 20:28:57,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 20:28:57,898 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:28:57,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:28:57,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2021-12-06 20:28:57,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:28:57,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969602784] [2021-12-06 20:28:57,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:28:57,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:28:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:57,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:57,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:57,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:57,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:58,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:58,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:58,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:58,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:58,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:58,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:58,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:58,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:58,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:58,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:28:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:28:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-12-06 20:28:58,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:28:58,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969602784] [2021-12-06 20:28:58,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969602784] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:28:58,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873773711] [2021-12-06 20:28:58,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:28:58,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:28:58,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:28:58,127 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:28:58,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 20:28:58,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-06 20:28:58,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:28:58,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 20:28:58,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:28:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-12-06 20:28:58,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:29:01,334 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 20:29:01,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873773711] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:29:01,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:29:01,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 31 [2021-12-06 20:29:01,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986296700] [2021-12-06 20:29:01,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:29:01,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 20:29:01,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:29:01,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 20:29:01,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=677, Unknown=0, NotChecked=0, Total=930 [2021-12-06 20:29:01,336 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 31 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2021-12-06 20:29:01,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:29:01,443 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-12-06 20:29:01,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 20:29:01,443 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) Word has length 76 [2021-12-06 20:29:01,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:29:01,444 INFO L225 Difference]: With dead ends: 52 [2021-12-06 20:29:01,444 INFO L226 Difference]: Without dead ends: 48 [2021-12-06 20:29:01,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=590, Invalid=1216, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 20:29:01,445 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 213 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:29:01,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 116 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:29:01,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-06 20:29:01,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-12-06 20:29:01,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-06 20:29:01,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-12-06 20:29:01,449 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2021-12-06 20:29:01,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:29:01,449 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-12-06 20:29:01,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2021-12-06 20:29:01,450 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-12-06 20:29:01,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 20:29:01,450 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:29:01,450 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:29:01,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 20:29:01,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 20:29:01,652 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:29:01,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:29:01,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2021-12-06 20:29:01,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:29:01,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886813612] [2021-12-06 20:29:01,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:29:01,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:29:01,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:01,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:01,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:01,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:01,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:01,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:01,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:01,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:01,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:01,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:01,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:01,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:01,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:01,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:01,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:01,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:01,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:01,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:01,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:01,896 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-12-06 20:29:01,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:29:01,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886813612] [2021-12-06 20:29:01,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886813612] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:29:01,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606857779] [2021-12-06 20:29:01,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:29:01,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:01,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:29:01,898 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:29:01,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 20:29:02,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-06 20:29:02,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:29:02,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 20:29:02,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:29:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-12-06 20:29:02,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:29:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-06 20:29:05,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606857779] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:29:05,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:29:05,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 29] total 33 [2021-12-06 20:29:05,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035880097] [2021-12-06 20:29:05,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:29:05,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 20:29:05,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:29:05,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 20:29:05,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 20:29:05,889 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2021-12-06 20:29:05,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:29:05,974 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-12-06 20:29:05,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 20:29:05,974 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) Word has length 82 [2021-12-06 20:29:05,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:29:05,975 INFO L225 Difference]: With dead ends: 55 [2021-12-06 20:29:05,975 INFO L226 Difference]: Without dead ends: 51 [2021-12-06 20:29:05,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=677, Invalid=1393, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 20:29:05,977 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:29:05,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 121 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:29:05,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-06 20:29:05,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-06 20:29:05,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 20:29:05,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-12-06 20:29:05,983 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2021-12-06 20:29:05,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:29:05,983 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-12-06 20:29:05,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2021-12-06 20:29:05,984 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-12-06 20:29:05,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-06 20:29:05,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:29:05,984 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:29:06,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-06 20:29:06,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:06,186 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:29:06,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:29:06,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2021-12-06 20:29:06,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:29:06,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29458849] [2021-12-06 20:29:06,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:29:06,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:29:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:06,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:06,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:06,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:06,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:06,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:06,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:06,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:06,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:06,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:06,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:06,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:06,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:06,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:06,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:06,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:06,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:06,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:06,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:06,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:06,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-12-06 20:29:06,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:29:06,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29458849] [2021-12-06 20:29:06,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29458849] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:29:06,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147046878] [2021-12-06 20:29:06,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:29:06,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:06,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:29:06,472 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:29:06,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 20:29:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:06,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 20:29:06,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:29:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-12-06 20:29:06,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:29:11,247 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 20:29:11,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147046878] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:29:11,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:29:11,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 31] total 35 [2021-12-06 20:29:11,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057821236] [2021-12-06 20:29:11,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:29:11,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 20:29:11,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:29:11,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 20:29:11,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=869, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 20:29:11,249 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 35 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2021-12-06 20:29:11,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:29:11,332 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-12-06 20:29:11,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 20:29:11,333 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) Word has length 88 [2021-12-06 20:29:11,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:29:11,333 INFO L225 Difference]: With dead ends: 58 [2021-12-06 20:29:11,334 INFO L226 Difference]: Without dead ends: 54 [2021-12-06 20:29:11,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=770, Invalid=1582, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 20:29:11,335 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 64 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:29:11,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 135 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:29:11,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-06 20:29:11,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-12-06 20:29:11,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-06 20:29:11,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-12-06 20:29:11,339 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2021-12-06 20:29:11,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:29:11,339 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-12-06 20:29:11,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2021-12-06 20:29:11,339 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-12-06 20:29:11,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-06 20:29:11,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:29:11,340 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:29:11,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 20:29:11,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:11,541 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:29:11,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:29:11,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2021-12-06 20:29:11,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:29:11,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541997889] [2021-12-06 20:29:11,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:29:11,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:29:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:11,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:11,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:11,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:11,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:11,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:11,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:11,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:11,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:11,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:11,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:11,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:11,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:11,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:11,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:11,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:11,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:11,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:11,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:11,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-12-06 20:29:11,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:29:11,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541997889] [2021-12-06 20:29:11,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541997889] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:29:11,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905029093] [2021-12-06 20:29:11,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:29:11,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:11,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:29:11,834 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:29:11,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 20:29:12,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:29:12,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:29:12,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 20:29:12,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:29:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-12-06 20:29:12,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:29:17,770 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-06 20:29:17,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905029093] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:29:17,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:29:17,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 33] total 37 [2021-12-06 20:29:17,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141553293] [2021-12-06 20:29:17,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:29:17,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 20:29:17,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:29:17,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 20:29:17,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=974, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 20:29:17,772 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 37 states, 35 states have (on average 2.057142857142857) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2021-12-06 20:29:17,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:29:17,867 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-12-06 20:29:17,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 20:29:17,867 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.057142857142857) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) Word has length 94 [2021-12-06 20:29:17,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:29:17,868 INFO L225 Difference]: With dead ends: 61 [2021-12-06 20:29:17,868 INFO L226 Difference]: Without dead ends: 57 [2021-12-06 20:29:17,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=869, Invalid=1783, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 20:29:17,869 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 71 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:29:17,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 132 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:29:17,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-06 20:29:17,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-06 20:29:17,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-06 20:29:17,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-12-06 20:29:17,873 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2021-12-06 20:29:17,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:29:17,873 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-12-06 20:29:17,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.057142857142857) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2021-12-06 20:29:17,874 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-12-06 20:29:17,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-06 20:29:17,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:29:17,874 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:29:17,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 20:29:18,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 20:29:18,076 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:29:18,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:29:18,076 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2021-12-06 20:29:18,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:29:18,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070817923] [2021-12-06 20:29:18,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:29:18,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:29:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:18,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:18,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:18,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:18,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:18,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:18,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:18,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:18,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:18,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:18,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:18,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:18,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:18,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:18,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:18,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:18,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:18,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:18,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:18,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-12-06 20:29:18,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:29:18,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070817923] [2021-12-06 20:29:18,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070817923] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:29:18,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275464561] [2021-12-06 20:29:18,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:29:18,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:18,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:29:18,399 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:29:18,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 20:29:18,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-12-06 20:29:18,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:29:18,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 20:29:18,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:29:18,881 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-12-06 20:29:18,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:29:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 20:29:25,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275464561] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:29:25,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:29:25,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 35] total 39 [2021-12-06 20:29:25,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672310893] [2021-12-06 20:29:25,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:29:25,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 20:29:25,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:29:25,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 20:29:25,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 20:29:25,552 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 39 states, 37 states have (on average 2.054054054054054) internal successors, (76), 39 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) [2021-12-06 20:29:25,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:29:25,687 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-12-06 20:29:25,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 20:29:25,688 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.054054054054054) internal successors, (76), 39 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) Word has length 100 [2021-12-06 20:29:25,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:29:25,688 INFO L225 Difference]: With dead ends: 64 [2021-12-06 20:29:25,688 INFO L226 Difference]: Without dead ends: 60 [2021-12-06 20:29:25,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=974, Invalid=1996, Unknown=0, NotChecked=0, Total=2970 [2021-12-06 20:29:25,690 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 406 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:29:25,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 139 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:29:25,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-06 20:29:25,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-06 20:29:25,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (18), 17 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-06 20:29:25,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-12-06 20:29:25,694 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2021-12-06 20:29:25,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:29:25,694 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-12-06 20:29:25,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.054054054054054) internal successors, (76), 39 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) [2021-12-06 20:29:25,694 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-12-06 20:29:25,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-06 20:29:25,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:29:25,695 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:29:25,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 20:29:25,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 20:29:25,896 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:29:25,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:29:25,897 INFO L85 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2021-12-06 20:29:25,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:29:25,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291702986] [2021-12-06 20:29:25,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:29:25,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:29:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:25,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:25,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:25,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:25,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:26,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:26,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:26,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:26,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:26,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:26,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:26,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:26,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:26,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:26,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:26,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:26,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:26,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:26,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:26,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:26,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:26,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-12-06 20:29:26,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:29:26,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291702986] [2021-12-06 20:29:26,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291702986] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:29:26,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506848522] [2021-12-06 20:29:26,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:29:26,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:26,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:29:26,273 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:29:26,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 20:29:26,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:29:26,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:29:26,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 20:29:26,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:29:26,826 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-12-06 20:29:26,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:29:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-06 20:29:35,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506848522] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:29:35,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:29:35,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 37] total 41 [2021-12-06 20:29:35,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547344921] [2021-12-06 20:29:35,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:29:35,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 20:29:35,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:29:35,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 20:29:35,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=1202, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 20:29:35,196 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 41 states, 39 states have (on average 2.051282051282051) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) [2021-12-06 20:29:35,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:29:35,321 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-12-06 20:29:35,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 20:29:35,321 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.051282051282051) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) Word has length 106 [2021-12-06 20:29:35,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:29:35,322 INFO L225 Difference]: With dead ends: 67 [2021-12-06 20:29:35,322 INFO L226 Difference]: Without dead ends: 63 [2021-12-06 20:29:35,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1085, Invalid=2221, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 20:29:35,323 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 222 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:29:35,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 136 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:29:35,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-06 20:29:35,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-12-06 20:29:35,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-06 20:29:35,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-12-06 20:29:35,327 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2021-12-06 20:29:35,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:29:35,327 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-12-06 20:29:35,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.051282051282051) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) [2021-12-06 20:29:35,328 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-12-06 20:29:35,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 20:29:35,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:29:35,328 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:29:35,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 20:29:35,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 20:29:35,530 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:29:35,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:29:35,531 INFO L85 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 17 times [2021-12-06 20:29:35,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:29:35,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783247271] [2021-12-06 20:29:35,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:29:35,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:29:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:35,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:35,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:35,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:35,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:35,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:35,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:35,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:35,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:35,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:35,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:35,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:35,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:35,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:35,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:35,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:35,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:35,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:35,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:35,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:35,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:35,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:35,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:35,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:35,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:35,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:35,871 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-12-06 20:29:35,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:29:35,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783247271] [2021-12-06 20:29:35,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783247271] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:29:35,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158114154] [2021-12-06 20:29:35,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:29:35,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:35,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:29:35,873 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:29:35,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 20:29:36,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-12-06 20:29:36,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:29:36,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 20:29:36,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:29:36,548 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-12-06 20:29:36,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:29:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 20:29:46,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158114154] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:29:46,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:29:46,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 39] total 43 [2021-12-06 20:29:46,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213872403] [2021-12-06 20:29:46,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:29:46,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 20:29:46,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:29:46,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 20:29:46,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=1325, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 20:29:46,695 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 43 states, 41 states have (on average 2.048780487804878) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) [2021-12-06 20:29:46,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:29:46,830 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-12-06 20:29:46,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 20:29:46,830 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 2.048780487804878) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) Word has length 112 [2021-12-06 20:29:46,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:29:46,831 INFO L225 Difference]: With dead ends: 70 [2021-12-06 20:29:46,831 INFO L226 Difference]: Without dead ends: 66 [2021-12-06 20:29:46,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1202, Invalid=2458, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 20:29:46,833 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 157 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:29:46,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 161 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:29:46,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-06 20:29:46,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-12-06 20:29:46,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 45 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (20), 19 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-06 20:29:46,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-12-06 20:29:46,836 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2021-12-06 20:29:46,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:29:46,836 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-12-06 20:29:46,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 2.048780487804878) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) [2021-12-06 20:29:46,837 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-12-06 20:29:46,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-06 20:29:46,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:29:46,837 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:29:46,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 20:29:47,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 20:29:47,039 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:29:47,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:29:47,040 INFO L85 PathProgramCache]: Analyzing trace with hash 55840780, now seen corresponding path program 18 times [2021-12-06 20:29:47,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:29:47,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534916071] [2021-12-06 20:29:47,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:29:47,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:29:47,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:47,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:47,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:47,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:47,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:47,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:47,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:47,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:47,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:47,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:47,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:47,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:47,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:47,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:47,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:47,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:47,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:47,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:47,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:47,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:47,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:47,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:47,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:47,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:47,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:47,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:29:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:29:47,410 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-12-06 20:29:47,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:29:47,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534916071] [2021-12-06 20:29:47,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534916071] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:29:47,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670314373] [2021-12-06 20:29:47,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:29:47,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:29:47,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:29:47,411 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:29:47,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 20:29:48,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-12-06 20:29:48,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:29:48,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 20:29:48,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:29:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-12-06 20:29:48,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:29:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 819 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-12-06 20:29:59,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670314373] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:29:59,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:29:59,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 41] total 45 [2021-12-06 20:29:59,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102984283] [2021-12-06 20:29:59,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:29:59,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 20:29:59,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:29:59,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 20:29:59,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=1454, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 20:29:59,950 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 45 states, 43 states have (on average 2.046511627906977) internal successors, (88), 45 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (56), 19 states have call predecessors, (56), 22 states have call successors, (56) [2021-12-06 20:30:00,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:30:00,093 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2021-12-06 20:30:00,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 20:30:00,093 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 2.046511627906977) internal successors, (88), 45 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (56), 19 states have call predecessors, (56), 22 states have call successors, (56) Word has length 118 [2021-12-06 20:30:00,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:30:00,094 INFO L225 Difference]: With dead ends: 73 [2021-12-06 20:30:00,094 INFO L226 Difference]: Without dead ends: 69 [2021-12-06 20:30:00,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1325, Invalid=2707, Unknown=0, NotChecked=0, Total=4032 [2021-12-06 20:30:00,096 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 122 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:30:00,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 170 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:30:00,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-06 20:30:00,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-12-06 20:30:00,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 47 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (21), 20 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-06 20:30:00,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-12-06 20:30:00,099 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2021-12-06 20:30:00,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:30:00,099 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-12-06 20:30:00,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 2.046511627906977) internal successors, (88), 45 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (56), 19 states have call predecessors, (56), 22 states have call successors, (56) [2021-12-06 20:30:00,099 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-12-06 20:30:00,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-06 20:30:00,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:30:00,100 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:30:00,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 20:30:00,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:30:00,301 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:30:00,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:30:00,302 INFO L85 PathProgramCache]: Analyzing trace with hash -806952938, now seen corresponding path program 19 times [2021-12-06 20:30:00,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:30:00,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949465488] [2021-12-06 20:30:00,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:30:00,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:30:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:00,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:00,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:00,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:00,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:00,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:00,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:00,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:00,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:00,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:00,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:00,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:00,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:00,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:00,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:00,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:00,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:00,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:00,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:00,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:00,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:00,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:00,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:00,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:00,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:00,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:00,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-12-06 20:30:00,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:30:00,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949465488] [2021-12-06 20:30:00,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949465488] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:30:00,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183407507] [2021-12-06 20:30:00,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:30:00,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:30:00,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:30:00,730 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:30:00,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 20:30:01,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:01,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-06 20:30:01,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:30:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-12-06 20:30:01,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:30:15,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-06 20:30:15,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183407507] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:30:15,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:30:15,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 43] total 47 [2021-12-06 20:30:15,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261056555] [2021-12-06 20:30:15,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:30:15,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-06 20:30:15,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:30:15,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-06 20:30:15,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=573, Invalid=1589, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 20:30:15,399 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 47 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 47 states have internal predecessors, (92), 23 states have call successors, (23), 1 states have call predecessors, (23), 21 states have return successors, (59), 20 states have call predecessors, (59), 23 states have call successors, (59) [2021-12-06 20:30:15,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:30:15,582 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-12-06 20:30:15,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 20:30:15,582 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 47 states have internal predecessors, (92), 23 states have call successors, (23), 1 states have call predecessors, (23), 21 states have return successors, (59), 20 states have call predecessors, (59), 23 states have call successors, (59) Word has length 124 [2021-12-06 20:30:15,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:30:15,583 INFO L225 Difference]: With dead ends: 76 [2021-12-06 20:30:15,583 INFO L226 Difference]: Without dead ends: 72 [2021-12-06 20:30:15,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1454, Invalid=2968, Unknown=0, NotChecked=0, Total=4422 [2021-12-06 20:30:15,585 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 874 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:30:15,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 162 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:30:15,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-06 20:30:15,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-12-06 20:30:15,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 49 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (22), 21 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-06 20:30:15,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-12-06 20:30:15,588 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2021-12-06 20:30:15,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:30:15,589 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-12-06 20:30:15,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 47 states have internal predecessors, (92), 23 states have call successors, (23), 1 states have call predecessors, (23), 21 states have return successors, (59), 20 states have call predecessors, (59), 23 states have call successors, (59) [2021-12-06 20:30:15,589 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-12-06 20:30:15,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-06 20:30:15,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:30:15,590 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:30:15,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 20:30:15,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:30:15,790 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:30:15,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:30:15,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1807457588, now seen corresponding path program 20 times [2021-12-06 20:30:15,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:30:15,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049264828] [2021-12-06 20:30:15,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:30:15,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:30:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:15,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:15,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:15,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:15,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:15,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:15,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:15,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:15,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:15,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:16,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:16,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:16,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:16,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:16,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:16,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:16,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:16,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:16,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:16,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:16,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:16,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:16,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:16,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:16,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:16,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:16,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-12-06 20:30:16,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:30:16,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049264828] [2021-12-06 20:30:16,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049264828] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:30:16,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064752974] [2021-12-06 20:30:16,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:30:16,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:30:16,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:30:16,191 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:30:16,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 20:30:17,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:30:17,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:30:17,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 20:30:17,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:30:17,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-12-06 20:30:17,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:30:33,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 1010 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-06 20:30:33,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064752974] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:30:33,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:30:33,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 45] total 49 [2021-12-06 20:30:33,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252304088] [2021-12-06 20:30:33,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:30:33,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 20:30:33,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:30:33,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 20:30:33,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 20:30:33,796 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 49 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 49 states have internal predecessors, (96), 24 states have call successors, (24), 1 states have call predecessors, (24), 22 states have return successors, (62), 21 states have call predecessors, (62), 24 states have call successors, (62) [2021-12-06 20:30:33,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:30:33,993 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-12-06 20:30:33,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 20:30:33,993 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 49 states have internal predecessors, (96), 24 states have call successors, (24), 1 states have call predecessors, (24), 22 states have return successors, (62), 21 states have call predecessors, (62), 24 states have call successors, (62) Word has length 130 [2021-12-06 20:30:33,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:30:33,994 INFO L225 Difference]: With dead ends: 79 [2021-12-06 20:30:33,994 INFO L226 Difference]: Without dead ends: 75 [2021-12-06 20:30:33,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1589, Invalid=3241, Unknown=0, NotChecked=0, Total=4830 [2021-12-06 20:30:33,996 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 999 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:30:33,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 179 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [489 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:30:33,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-06 20:30:33,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-12-06 20:30:33,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.02) internal successors, (51), 51 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (23), 22 states have call predecessors, (23), 2 states have call successors, (23) [2021-12-06 20:30:33,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-12-06 20:30:33,999 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 130 [2021-12-06 20:30:33,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:30:33,999 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-12-06 20:30:33,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 49 states have internal predecessors, (96), 24 states have call successors, (24), 1 states have call predecessors, (24), 22 states have return successors, (62), 21 states have call predecessors, (62), 24 states have call successors, (62) [2021-12-06 20:30:33,999 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-12-06 20:30:34,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-06 20:30:34,000 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:30:34,000 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:30:34,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 20:30:34,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:30:34,201 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:30:34,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:30:34,202 INFO L85 PathProgramCache]: Analyzing trace with hash 874439510, now seen corresponding path program 21 times [2021-12-06 20:30:34,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:30:34,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801814778] [2021-12-06 20:30:34,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:30:34,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:30:34,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:34,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:34,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:34,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:34,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:34,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:34,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:34,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:34,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:34,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:34,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:34,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:34,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:34,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:34,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:34,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:34,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:34,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:34,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:34,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:34,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:34,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:34,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:34,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:34,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:34,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:34,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:34,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:34,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:34,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-12-06 20:30:34,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:30:34,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801814778] [2021-12-06 20:30:34,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801814778] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:30:34,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219615774] [2021-12-06 20:30:34,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:30:34,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:30:34,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:30:34,662 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:30:34,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 20:30:35,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-12-06 20:30:35,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:30:35,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 20:30:35,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:30:35,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-12-06 20:30:35,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:30:55,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-06 20:30:55,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219615774] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:30:55,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:30:55,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 47] total 51 [2021-12-06 20:30:55,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176752658] [2021-12-06 20:30:55,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:30:55,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 20:30:55,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:30:55,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 20:30:55,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=1877, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 20:30:55,023 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 51 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 51 states have internal predecessors, (100), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (65), 22 states have call predecessors, (65), 25 states have call successors, (65) [2021-12-06 20:30:55,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:30:55,236 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2021-12-06 20:30:55,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 20:30:55,237 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 51 states have internal predecessors, (100), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (65), 22 states have call predecessors, (65), 25 states have call successors, (65) Word has length 136 [2021-12-06 20:30:55,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:30:55,237 INFO L225 Difference]: With dead ends: 82 [2021-12-06 20:30:55,237 INFO L226 Difference]: Without dead ends: 78 [2021-12-06 20:30:55,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1730, Invalid=3526, Unknown=0, NotChecked=0, Total=5256 [2021-12-06 20:30:55,239 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 507 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:30:55,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 186 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:30:55,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-06 20:30:55,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-12-06 20:30:55,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 53 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 23 states have return successors, (24), 23 states have call predecessors, (24), 2 states have call successors, (24) [2021-12-06 20:30:55,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-12-06 20:30:55,242 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 136 [2021-12-06 20:30:55,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:30:55,242 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-12-06 20:30:55,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 51 states have internal predecessors, (100), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (65), 22 states have call predecessors, (65), 25 states have call successors, (65) [2021-12-06 20:30:55,243 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-12-06 20:30:55,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-06 20:30:55,243 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:30:55,243 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:30:55,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 20:30:55,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:30:55,444 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:30:55,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:30:55,444 INFO L85 PathProgramCache]: Analyzing trace with hash 849241484, now seen corresponding path program 22 times [2021-12-06 20:30:55,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:30:55,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734802931] [2021-12-06 20:30:55,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:30:55,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:30:55,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:55,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:55,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:55,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:55,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:55,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:55,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:55,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:55,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:55,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:55,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:55,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:55,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:55,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:55,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:55,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:55,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:55,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:55,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:55,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:55,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:55,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:55,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:55,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:55,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:55,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:55,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:55,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:55,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:55,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:55,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:30:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:30:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-12-06 20:30:55,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:30:55,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734802931] [2021-12-06 20:30:55,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734802931] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:30:55,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280292054] [2021-12-06 20:30:55,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:30:55,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:30:55,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:30:55,927 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:30:55,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 20:30:57,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:30:57,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:30:57,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 20:30:57,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:30:57,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-12-06 20:30:57,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:31:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-06 20:31:20,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280292054] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:31:20,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:31:20,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 49] total 53 [2021-12-06 20:31:20,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362457973] [2021-12-06 20:31:20,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:31:20,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-06 20:31:20,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:31:20,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-06 20:31:20,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=726, Invalid=2030, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 20:31:20,785 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 53 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 53 states have internal predecessors, (104), 26 states have call successors, (26), 1 states have call predecessors, (26), 24 states have return successors, (68), 23 states have call predecessors, (68), 26 states have call successors, (68) [2021-12-06 20:31:21,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:31:21,004 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2021-12-06 20:31:21,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 20:31:21,004 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 53 states have internal predecessors, (104), 26 states have call successors, (26), 1 states have call predecessors, (26), 24 states have return successors, (68), 23 states have call predecessors, (68), 26 states have call successors, (68) Word has length 142 [2021-12-06 20:31:21,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:31:21,005 INFO L225 Difference]: With dead ends: 85 [2021-12-06 20:31:21,005 INFO L226 Difference]: Without dead ends: 81 [2021-12-06 20:31:21,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1877, Invalid=3823, Unknown=0, NotChecked=0, Total=5700 [2021-12-06 20:31:21,006 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 383 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:31:21,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 191 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:31:21,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-06 20:31:21,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-12-06 20:31:21,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 55 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (25), 24 states have call predecessors, (25), 2 states have call successors, (25) [2021-12-06 20:31:21,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-12-06 20:31:21,009 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 142 [2021-12-06 20:31:21,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:31:21,009 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-12-06 20:31:21,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 53 states have internal predecessors, (104), 26 states have call successors, (26), 1 states have call predecessors, (26), 24 states have return successors, (68), 23 states have call predecessors, (68), 26 states have call successors, (68) [2021-12-06 20:31:21,010 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-12-06 20:31:21,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-06 20:31:21,010 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:31:21,010 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:31:21,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-06 20:31:21,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:31:21,212 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:31:21,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:31:21,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1665808022, now seen corresponding path program 23 times [2021-12-06 20:31:21,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:31:21,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435686276] [2021-12-06 20:31:21,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:31:21,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:31:21,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:21,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:21,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:21,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:21,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:21,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:21,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:21,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:21,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:21,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:21,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:21,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:21,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:21,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:21,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:21,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:21,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:21,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:21,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:21,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:21,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:21,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:21,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:21,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:21,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:21,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:21,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:21,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:21,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:21,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:21,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:21,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:21,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-12-06 20:31:21,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:31:21,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435686276] [2021-12-06 20:31:21,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435686276] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:31:21,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086279730] [2021-12-06 20:31:21,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:31:21,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:31:21,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:31:21,855 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:31:21,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 20:31:23,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-12-06 20:31:23,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:31:23,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 20:31:23,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:31:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-12-06 20:31:23,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:31:49,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-06 20:31:49,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086279730] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:31:49,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:31:49,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 51] total 55 [2021-12-06 20:31:49,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202474307] [2021-12-06 20:31:49,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:31:49,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-06 20:31:49,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:31:49,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-06 20:31:49,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2021-12-06 20:31:49,172 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 55 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 55 states have internal predecessors, (108), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (71), 24 states have call predecessors, (71), 27 states have call successors, (71) [2021-12-06 20:31:49,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:31:49,389 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2021-12-06 20:31:49,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 20:31:49,390 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 55 states have internal predecessors, (108), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (71), 24 states have call predecessors, (71), 27 states have call successors, (71) Word has length 148 [2021-12-06 20:31:49,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:31:49,390 INFO L225 Difference]: With dead ends: 88 [2021-12-06 20:31:49,390 INFO L226 Difference]: Without dead ends: 84 [2021-12-06 20:31:49,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=2030, Invalid=4132, Unknown=0, NotChecked=0, Total=6162 [2021-12-06 20:31:49,391 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 300 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:31:49,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 200 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:31:49,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-06 20:31:49,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-12-06 20:31:49,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 57 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 25 states have return successors, (26), 25 states have call predecessors, (26), 2 states have call successors, (26) [2021-12-06 20:31:49,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-12-06 20:31:49,395 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 148 [2021-12-06 20:31:49,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:31:49,395 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-12-06 20:31:49,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 55 states have internal predecessors, (108), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (71), 24 states have call predecessors, (71), 27 states have call successors, (71) [2021-12-06 20:31:49,395 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-12-06 20:31:49,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-06 20:31:49,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:31:49,396 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:31:49,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-06 20:31:49,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 20:31:49,597 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:31:49,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:31:49,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1715345484, now seen corresponding path program 24 times [2021-12-06 20:31:49,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:31:49,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613654623] [2021-12-06 20:31:49,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:31:49,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:31:49,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:49,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:49,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:49,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:49,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:49,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:49,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:49,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:49,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:49,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:49,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:49,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:49,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:49,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:49,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:49,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:49,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:49,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:49,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:49,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:49,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:50,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:50,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:50,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:50,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:50,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:50,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:50,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:50,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:50,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:50,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:50,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:50,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:50,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:50,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:50,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:50,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:31:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:31:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2021-12-06 20:31:50,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:31:50,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613654623] [2021-12-06 20:31:50,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613654623] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:31:50,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445719219] [2021-12-06 20:31:50,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:31:50,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:31:50,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:31:50,198 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:31:50,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 20:31:52,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-12-06 20:31:52,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:31:52,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-06 20:31:52,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:31:52,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2021-12-06 20:31:52,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:32:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 1452 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-12-06 20:32:22,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445719219] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:32:22,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:32:22,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 53] total 56 [2021-12-06 20:32:22,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342292721] [2021-12-06 20:32:22,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:32:22,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-06 20:32:22,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:32:22,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-06 20:32:22,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=2245, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 20:32:22,276 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 56 states have internal predecessors, (111), 27 states have call successors, (27), 1 states have call predecessors, (27), 26 states have return successors, (73), 25 states have call predecessors, (73), 27 states have call successors, (73) [2021-12-06 20:32:22,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:32:22,487 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2021-12-06 20:32:22,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 20:32:22,487 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 56 states have internal predecessors, (111), 27 states have call successors, (27), 1 states have call predecessors, (27), 26 states have return successors, (73), 25 states have call predecessors, (73), 27 states have call successors, (73) Word has length 154 [2021-12-06 20:32:22,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:32:22,488 INFO L225 Difference]: With dead ends: 91 [2021-12-06 20:32:22,488 INFO L226 Difference]: Without dead ends: 87 [2021-12-06 20:32:22,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 328 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1899 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=2186, Invalid=4294, Unknown=0, NotChecked=0, Total=6480 [2021-12-06 20:32:22,489 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 159 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:32:22,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 202 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:32:22,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-06 20:32:22,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-12-06 20:32:22,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 59 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (27), 26 states have call predecessors, (27), 2 states have call successors, (27) [2021-12-06 20:32:22,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2021-12-06 20:32:22,492 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 154 [2021-12-06 20:32:22,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:32:22,493 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2021-12-06 20:32:22,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 56 states have internal predecessors, (111), 27 states have call successors, (27), 1 states have call predecessors, (27), 26 states have return successors, (73), 25 states have call predecessors, (73), 27 states have call successors, (73) [2021-12-06 20:32:22,493 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2021-12-06 20:32:22,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-06 20:32:22,494 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:32:22,494 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:32:22,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 20:32:22,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 20:32:22,695 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:32:22,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:32:22,696 INFO L85 PathProgramCache]: Analyzing trace with hash -678635050, now seen corresponding path program 25 times [2021-12-06 20:32:22,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:32:22,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79885776] [2021-12-06 20:32:22,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:32:22,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:32:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:22,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:22,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:22,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:23,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:23,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:23,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:23,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:23,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:23,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:23,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:23,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:23,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:23,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:23,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:23,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:23,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:23,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:23,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:23,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:23,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:23,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:23,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:23,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:23,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:24,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:24,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:24,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:24,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:24,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:24,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:24,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:24,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:24,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:24,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2021-12-06 20:32:24,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:32:24,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79885776] [2021-12-06 20:32:24,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79885776] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:32:24,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740082621] [2021-12-06 20:32:24,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:32:24,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:32:24,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:32:24,429 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:32:24,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 20:32:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:26,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 107 conjunts are in the unsatisfiable core [2021-12-06 20:32:26,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:32:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2021-12-06 20:32:26,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:32:29,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2021-12-06 20:32:29,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740082621] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:32:29,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:32:29,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 55 [2021-12-06 20:32:29,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405528785] [2021-12-06 20:32:29,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:32:29,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-06 20:32:29,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:32:29,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-06 20:32:29,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2021-12-06 20:32:29,172 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 29 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (26), 26 states have call predecessors, (26), 1 states have call successors, (26) [2021-12-06 20:32:29,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:32:29,705 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2021-12-06 20:32:29,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-06 20:32:29,706 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 29 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (26), 26 states have call predecessors, (26), 1 states have call successors, (26) Word has length 160 [2021-12-06 20:32:29,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:32:29,706 INFO L225 Difference]: With dead ends: 94 [2021-12-06 20:32:29,706 INFO L226 Difference]: Without dead ends: 90 [2021-12-06 20:32:29,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 367 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2021-12-06 20:32:29,707 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 0 mSDsluCounter, 2581 mSDsCounter, 0 mSdLazyCounter, 2032 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2643 SdHoareTripleChecker+Invalid, 2032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:32:29,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2643 Invalid, 2032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2032 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:32:29,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-06 20:32:29,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-12-06 20:32:29,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 61 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (28), 27 states have call predecessors, (28), 2 states have call successors, (28) [2021-12-06 20:32:29,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2021-12-06 20:32:29,711 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 160 [2021-12-06 20:32:29,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:32:29,711 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2021-12-06 20:32:29,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 29 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (26), 26 states have call predecessors, (26), 1 states have call successors, (26) [2021-12-06 20:32:29,711 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2021-12-06 20:32:29,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-06 20:32:29,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:32:29,712 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:32:29,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-06 20:32:29,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 20:32:29,913 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:32:29,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:32:29,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1845527796, now seen corresponding path program 26 times [2021-12-06 20:32:29,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:32:29,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603731367] [2021-12-06 20:32:29,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:32:29,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:32:30,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:30,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:30,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:30,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:30,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:30,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:30,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:30,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:30,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:30,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:30,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:30,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:30,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:30,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:30,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:30,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:30,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:30,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:30,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:30,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:30,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:30,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:30,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:30,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:30,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:30,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:30,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:30,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:30,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:30,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:30,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:30,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:30,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:30,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:30,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 20:32:30,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:32:30,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 975 proven. 52 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-12-06 20:32:30,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:32:30,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603731367] [2021-12-06 20:32:30,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603731367] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:32:30,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287025700] [2021-12-06 20:32:30,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:32:30,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:32:30,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:32:30,639 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:32:30,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 20:32:32,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:32:32,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:32:32,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 20:32:32,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:32:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 1027 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-12-06 20:32:33,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:32:33,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287025700] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:32:33,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:32:33,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [31] total 33 [2021-12-06 20:32:33,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230827744] [2021-12-06 20:32:33,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:32:33,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 20:32:33,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:32:33,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 20:32:33,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=640, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 20:32:33,056 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 31 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) [2021-12-06 20:32:33,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:32:33,338 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2021-12-06 20:32:33,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 20:32:33,338 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 31 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) Word has length 166 [2021-12-06 20:32:33,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:32:33,338 INFO L225 Difference]: With dead ends: 90 [2021-12-06 20:32:33,338 INFO L226 Difference]: Without dead ends: 0 [2021-12-06 20:32:33,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1226, Invalid=2314, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 20:32:33,339 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 4 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:32:33,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 262 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:32:33,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-06 20:32:33,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-06 20:32:33,340 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 20:32:33,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-06 20:32:33,340 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 166 [2021-12-06 20:32:33,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:32:33,340 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-06 20:32:33,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 31 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) [2021-12-06 20:32:33,340 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-06 20:32:33,341 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-06 20:32:33,342 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-06 20:32:33,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-06 20:32:33,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 20:32:33,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-06 20:32:33,585 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-06 20:32:33,585 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-06 20:32:33,585 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-06 20:32:33,585 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-06 20:32:33,586 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2021-12-06 20:32:33,586 INFO L858 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2021-12-06 20:32:33,586 INFO L858 garLoopResultBuilder]: For program point L14(lines 14 16) no Hoare annotation was computed. [2021-12-06 20:32:33,588 INFO L854 garLoopResultBuilder]: At program point L13(line 13) the Hoare annotation is: (and (<= 25 |ULTIMATE.start_main_~input~0#1|) (<= |ULTIMATE.start_main_~input~0#1| 25)) [2021-12-06 20:32:33,588 INFO L858 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2021-12-06 20:32:33,588 INFO L858 garLoopResultBuilder]: For program point L11(lines 11 17) no Hoare annotation was computed. [2021-12-06 20:32:33,589 INFO L858 garLoopResultBuilder]: For program point idFINAL(lines 6 9) no Hoare annotation was computed. [2021-12-06 20:32:33,589 INFO L858 garLoopResultBuilder]: For program point idEXIT(lines 6 9) no Hoare annotation was computed. [2021-12-06 20:32:33,589 INFO L854 garLoopResultBuilder]: At program point L8(line 8) the Hoare annotation is: (= |id_#in~x| id_~x) [2021-12-06 20:32:33,589 INFO L861 garLoopResultBuilder]: At program point idENTRY(lines 6 9) the Hoare annotation is: true [2021-12-06 20:32:33,589 INFO L858 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-12-06 20:32:33,590 INFO L858 garLoopResultBuilder]: For program point L8-1(line 8) no Hoare annotation was computed. [2021-12-06 20:32:33,597 INFO L732 BasicCegarLoop]: Path program histogram: [26, 1] [2021-12-06 20:32:33,599 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 20:32:33,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 08:32:33 BoogieIcfgContainer [2021-12-06 20:32:33,604 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 20:32:33,605 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 20:32:33,605 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 20:32:33,605 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 20:32:33,605 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:28:43" (3/4) ... [2021-12-06 20:32:33,608 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-06 20:32:33,614 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2021-12-06 20:32:33,617 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-12-06 20:32:33,617 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-06 20:32:33,617 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-06 20:32:33,617 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-06 20:32:33,636 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-06 20:32:33,636 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 20:32:33,636 INFO L158 Benchmark]: Toolchain (without parser) took 230822.31ms. Allocated memory was 98.6MB in the beginning and 507.5MB in the end (delta: 408.9MB). Free memory was 66.4MB in the beginning and 90.1MB in the end (delta: -23.7MB). Peak memory consumption was 384.5MB. Max. memory is 16.1GB. [2021-12-06 20:32:33,636 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 98.6MB. Free memory is still 51.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 20:32:33,636 INFO L158 Benchmark]: CACSL2BoogieTranslator took 149.92ms. Allocated memory is still 98.6MB. Free memory was 66.2MB in the beginning and 75.3MB in the end (delta: -9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 20:32:33,637 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.16ms. Allocated memory is still 98.6MB. Free memory was 75.3MB in the beginning and 73.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 20:32:33,637 INFO L158 Benchmark]: Boogie Preprocessor took 11.47ms. Allocated memory is still 98.6MB. Free memory was 73.8MB in the beginning and 72.9MB in the end (delta: 867.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 20:32:33,637 INFO L158 Benchmark]: RCFGBuilder took 162.16ms. Allocated memory is still 98.6MB. Free memory was 72.9MB in the beginning and 64.6MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 20:32:33,637 INFO L158 Benchmark]: TraceAbstraction took 230441.93ms. Allocated memory was 98.6MB in the beginning and 507.5MB in the end (delta: 408.9MB). Free memory was 64.1MB in the beginning and 92.2MB in the end (delta: -28.1MB). Peak memory consumption was 380.9MB. Max. memory is 16.1GB. [2021-12-06 20:32:33,637 INFO L158 Benchmark]: Witness Printer took 31.10ms. Allocated memory is still 507.5MB. Free memory was 92.2MB in the beginning and 90.1MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-06 20:32:33,638 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 98.6MB. Free memory is still 51.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 149.92ms. Allocated memory is still 98.6MB. Free memory was 66.2MB in the beginning and 75.3MB in the end (delta: -9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.16ms. Allocated memory is still 98.6MB. Free memory was 75.3MB in the beginning and 73.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 11.47ms. Allocated memory is still 98.6MB. Free memory was 73.8MB in the beginning and 72.9MB in the end (delta: 867.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 162.16ms. Allocated memory is still 98.6MB. Free memory was 72.9MB in the beginning and 64.6MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 230441.93ms. Allocated memory was 98.6MB in the beginning and 507.5MB in the end (delta: 408.9MB). Free memory was 64.1MB in the beginning and 92.2MB in the end (delta: -28.1MB). Peak memory consumption was 380.9MB. Max. memory is 16.1GB. * Witness Printer took 31.10ms. Allocated memory is still 507.5MB. Free memory was 92.2MB in the beginning and 90.1MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 230.4s, OverallIterations: 27, TraceHistogramMax: 27, PathProgramHistogramMax: 26, EmptinessCheckTime: 0.0s, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5417 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5041 mSDsluCounter, 5861 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5488 mSDsCounter, 2216 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4025 IncrementalHoareTripleChecker+Invalid, 6241 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2216 mSolverCounterUnsat, 373 mSDtfsCounter, 4025 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6108 GetRequests, 4895 SyntacticMatches, 7 SemanticMatches, 1206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17245 ImplicationChecksByTransitivity, 7.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=26, InterpolantAutomatonStates: 511, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 27 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 8 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 203.9s InterpolantComputationTime, 4742 NumberOfCodeBlocks, 4742 NumberOfCodeBlocksAsserted, 226 NumberOfCheckSat, 6864 ConstructedInterpolants, 0 QuantifiedInterpolants, 20866 SizeOfPredicates, 352 NumberOfNonLiveVariables, 6110 ConjunctsInSsa, 859 ConjunctsInUnsatCore, 78 InterpolantComputations, 2 PerfectInterpolantSequences, 24506/54808 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-06 20:32:33,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e8a0f4d-0ae4-40b6-b12d-33e032964e19/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE