./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/add_last-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/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_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/add_last-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 870a7e5617be5a547f8d530603b5c27ad6cbb74bb05a83654285fee7bbb92753 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:38:36,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:38:36,094 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:38:36,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:38:36,123 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:38:36,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:38:36,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:38:36,128 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:38:36,130 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:38:36,130 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:38:36,131 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:38:36,132 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:38:36,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:38:36,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:38:36,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:38:36,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:38:36,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:38:36,140 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:38:36,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:38:36,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:38:36,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:38:36,146 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:38:36,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:38:36,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:38:36,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:38:36,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:38:36,151 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:38:36,152 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:38:36,152 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:38:36,153 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:38:36,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:38:36,154 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:38:36,155 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:38:36,156 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:38:36,157 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:38:36,157 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:38:36,157 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:38:36,158 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:38:36,158 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:38:36,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:38:36,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:38:36,160 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-06 18:38:36,184 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:38:36,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:38:36,184 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:38:36,184 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:38:36,185 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:38:36,185 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:38:36,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:38:36,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:38:36,187 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:38:36,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:38:36,187 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:38:36,187 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 18:38:36,187 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:38:36,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:38:36,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:38:36,188 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 18:38:36,188 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 18:38:36,188 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 18:38:36,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:38:36,189 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 18:38:36,189 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:38:36,189 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:38:36,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:38:36,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:38:36,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:38:36,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:38:36,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:38:36,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:38:36,195 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:38:36,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:38:36,195 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:38:36,195 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_341143c1-aeb2-43d2-95b0-401c16eb40f8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 870a7e5617be5a547f8d530603b5c27ad6cbb74bb05a83654285fee7bbb92753 [2021-12-06 18:38:36,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:38:36,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:38:36,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:38:36,406 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:38:36,407 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:38:36,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-memsafety/add_last-alloca-1.i [2021-12-06 18:38:36,450 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/data/8cd130fd1/f41c9e75a2234ec5b05dbce319c18785/FLAG7c82dbd51 [2021-12-06 18:38:36,879 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:38:36,880 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/sv-benchmarks/c/array-memsafety/add_last-alloca-1.i [2021-12-06 18:38:36,889 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/data/8cd130fd1/f41c9e75a2234ec5b05dbce319c18785/FLAG7c82dbd51 [2021-12-06 18:38:36,898 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/data/8cd130fd1/f41c9e75a2234ec5b05dbce319c18785 [2021-12-06 18:38:36,900 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:38:36,901 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:38:36,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:38:36,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:38:36,905 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:38:36,905 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:38:36" (1/1) ... [2021-12-06 18:38:36,906 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a3f7c5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:38:36, skipping insertion in model container [2021-12-06 18:38:36,906 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:38:36" (1/1) ... [2021-12-06 18:38:36,911 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:38:36,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:38:37,106 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:38:37,112 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:38:37,137 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:38:37,157 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:38:37,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:38:37 WrapperNode [2021-12-06 18:38:37,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:38:37,158 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:38:37,158 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:38:37,158 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:38:37,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:38:37" (1/1) ... [2021-12-06 18:38:37,173 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:38:37" (1/1) ... [2021-12-06 18:38:37,187 INFO L137 Inliner]: procedures = 115, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2021-12-06 18:38:37,187 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:38:37,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:38:37,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:38:37,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:38:37,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:38:37" (1/1) ... [2021-12-06 18:38:37,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:38:37" (1/1) ... [2021-12-06 18:38:37,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:38:37" (1/1) ... [2021-12-06 18:38:37,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:38:37" (1/1) ... [2021-12-06 18:38:37,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:38:37" (1/1) ... [2021-12-06 18:38:37,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:38:37" (1/1) ... [2021-12-06 18:38:37,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:38:37" (1/1) ... [2021-12-06 18:38:37,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:38:37,205 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:38:37,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:38:37,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:38:37,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:38:37" (1/1) ... [2021-12-06 18:38:37,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:38:37,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:38:37,228 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:38:37,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:38:37,257 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 18:38:37,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 18:38:37,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 18:38:37,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 18:38:37,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:38:37,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:38:37,317 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:38:37,318 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:38:37,451 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:38:37,456 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:38:37,456 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 18:38:37,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:38:37 BoogieIcfgContainer [2021-12-06 18:38:37,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:38:37,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:38:37,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:38:37,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:38:37,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:38:36" (1/3) ... [2021-12-06 18:38:37,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@727ecd99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:38:37, skipping insertion in model container [2021-12-06 18:38:37,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:38:37" (2/3) ... [2021-12-06 18:38:37,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@727ecd99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:38:37, skipping insertion in model container [2021-12-06 18:38:37,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:38:37" (3/3) ... [2021-12-06 18:38:37,464 INFO L111 eAbstractionObserver]: Analyzing ICFG add_last-alloca-1.i [2021-12-06 18:38:37,469 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:38:37,469 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-12-06 18:38:37,505 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:38:37,511 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 18:38:37,511 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-12-06 18:38:37,522 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 2.0) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:37,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 18:38:37,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:38:37,528 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 18:38:37,529 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:38:37,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:38:37,534 INFO L85 PathProgramCache]: Analyzing trace with hash 889508760, now seen corresponding path program 1 times [2021-12-06 18:38:37,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:38:37,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213321757] [2021-12-06 18:38:37,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:37,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:38:37,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:37,669 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 18:38:37,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:38:37,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213321757] [2021-12-06 18:38:37,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213321757] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:38:37,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:38:37,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:38:37,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247174293] [2021-12-06 18:38:37,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:38:37,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:38:37,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:38:37,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:38:37,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:38:37,698 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 2.0) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 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 18:38:37,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:38:37,735 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-12-06 18:38:37,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:38:37,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-06 18:38:37,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:38:37,742 INFO L225 Difference]: With dead ends: 33 [2021-12-06 18:38:37,743 INFO L226 Difference]: Without dead ends: 31 [2021-12-06 18:38:37,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:38:37,746 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 62 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:38:37,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 27 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:38:37,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-06 18:38:37,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-06 18:38:37,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 18:38:37,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-12-06 18:38:37,771 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 6 [2021-12-06 18:38:37,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:38:37,771 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-12-06 18:38:37,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 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 18:38:37,771 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-12-06 18:38:37,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 18:38:37,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:38:37,772 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:38:37,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:38:37,772 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:38:37,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:38:37,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1804968471, now seen corresponding path program 1 times [2021-12-06 18:38:37,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:38:37,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627662650] [2021-12-06 18:38:37,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:37,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:38:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:37,813 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 18:38:37,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:38:37,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627662650] [2021-12-06 18:38:37,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627662650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:38:37,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:38:37,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:38:37,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241278961] [2021-12-06 18:38:37,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:38:37,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:38:37,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:38:37,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:38:37,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:38:37,817 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 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 18:38:37,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:38:37,850 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-12-06 18:38:37,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:38:37,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 18:38:37,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:38:37,852 INFO L225 Difference]: With dead ends: 37 [2021-12-06 18:38:37,852 INFO L226 Difference]: Without dead ends: 37 [2021-12-06 18:38:37,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:38:37,854 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 38 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:38:37,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 42 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:38:37,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-06 18:38:37,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2021-12-06 18:38:37,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:37,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-12-06 18:38:37,860 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 7 [2021-12-06 18:38:37,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:38:37,860 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-12-06 18:38:37,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 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 18:38:37,861 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-12-06 18:38:37,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 18:38:37,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:38:37,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:38:37,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 18:38:37,862 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:38:37,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:38:37,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1804968521, now seen corresponding path program 1 times [2021-12-06 18:38:37,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:38:37,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379458645] [2021-12-06 18:38:37,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:37,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:38:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:37,903 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 18:38:37,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:38:37,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379458645] [2021-12-06 18:38:37,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379458645] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:38:37,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:38:37,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:38:37,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560856196] [2021-12-06 18:38:37,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:38:37,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:38:37,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:38:37,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:38:37,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:38:37,906 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 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 18:38:37,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:38:37,929 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-12-06 18:38:37,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:38:37,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 18:38:37,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:38:37,930 INFO L225 Difference]: With dead ends: 29 [2021-12-06 18:38:37,930 INFO L226 Difference]: Without dead ends: 29 [2021-12-06 18:38:37,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:38:37,932 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 21 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:38:37,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 18 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:38:37,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-06 18:38:37,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-06 18:38:37,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.631578947368421) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 18:38:37,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-12-06 18:38:37,938 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 7 [2021-12-06 18:38:37,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:38:37,938 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-12-06 18:38:37,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 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 18:38:37,938 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-12-06 18:38:37,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 18:38:37,939 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:38:37,939 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:38:37,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 18:38:37,939 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:38:37,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:38:37,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1804968522, now seen corresponding path program 1 times [2021-12-06 18:38:37,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:38:37,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723227956] [2021-12-06 18:38:37,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:37,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:38:37,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:38,001 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 18:38:38,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:38:38,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723227956] [2021-12-06 18:38:38,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723227956] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:38:38,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:38:38,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:38:38,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953556704] [2021-12-06 18:38:38,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:38:38,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:38:38,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:38:38,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:38:38,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:38:38,004 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 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 18:38:38,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:38:38,049 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-12-06 18:38:38,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:38:38,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 18:38:38,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:38:38,050 INFO L225 Difference]: With dead ends: 32 [2021-12-06 18:38:38,050 INFO L226 Difference]: Without dead ends: 32 [2021-12-06 18:38:38,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:38:38,051 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 59 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:38:38,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 26 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:38:38,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-06 18:38:38,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-12-06 18:38:38,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.6) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:38,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-12-06 18:38:38,055 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 7 [2021-12-06 18:38:38,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:38:38,055 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-12-06 18:38:38,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 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 18:38:38,055 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-12-06 18:38:38,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 18:38:38,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:38:38,056 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:38:38,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 18:38:38,056 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:38:38,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:38:38,062 INFO L85 PathProgramCache]: Analyzing trace with hash -2013824102, now seen corresponding path program 1 times [2021-12-06 18:38:38,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:38:38,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265239780] [2021-12-06 18:38:38,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:38,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:38:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:38:38,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:38:38,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265239780] [2021-12-06 18:38:38,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265239780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:38:38,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:38:38,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:38:38,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360882810] [2021-12-06 18:38:38,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:38:38,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:38:38,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:38:38,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:38:38,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:38:38,103 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:38,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:38:38,128 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-12-06 18:38:38,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:38:38,128 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 18:38:38,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:38:38,128 INFO L225 Difference]: With dead ends: 27 [2021-12-06 18:38:38,128 INFO L226 Difference]: Without dead ends: 27 [2021-12-06 18:38:38,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:38:38,130 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:38:38,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 16 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:38:38,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-06 18:38:38,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-06 18:38:38,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.45) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 18:38:38,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-12-06 18:38:38,133 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 11 [2021-12-06 18:38:38,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:38:38,133 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-12-06 18:38:38,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:38,133 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-12-06 18:38:38,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 18:38:38,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:38:38,134 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:38:38,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 18:38:38,134 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:38:38,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:38:38,134 INFO L85 PathProgramCache]: Analyzing trace with hash -2013824101, now seen corresponding path program 1 times [2021-12-06 18:38:38,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:38:38,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979315784] [2021-12-06 18:38:38,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:38,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:38:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:38:38,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:38:38,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979315784] [2021-12-06 18:38:38,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979315784] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:38:38,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:38:38,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:38:38,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611463227] [2021-12-06 18:38:38,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:38:38,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:38:38,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:38:38,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:38:38,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:38:38,206 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:38,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:38:38,249 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-12-06 18:38:38,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:38:38,249 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 18:38:38,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:38:38,250 INFO L225 Difference]: With dead ends: 35 [2021-12-06 18:38:38,250 INFO L226 Difference]: Without dead ends: 35 [2021-12-06 18:38:38,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:38:38,251 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 84 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:38:38,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 18 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:38:38,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-06 18:38:38,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2021-12-06 18:38:38,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:38,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-12-06 18:38:38,256 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 11 [2021-12-06 18:38:38,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:38:38,256 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-12-06 18:38:38,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:38,256 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-12-06 18:38:38,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 18:38:38,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:38:38,257 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:38:38,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 18:38:38,257 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:38:38,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:38:38,258 INFO L85 PathProgramCache]: Analyzing trace with hash -2013824051, now seen corresponding path program 1 times [2021-12-06 18:38:38,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:38:38,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319684784] [2021-12-06 18:38:38,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:38,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:38:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:38,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:38,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:38:38,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319684784] [2021-12-06 18:38:38,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319684784] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:38:38,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906824115] [2021-12-06 18:38:38,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:38,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:38:38,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:38:38,300 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:38:38,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:38:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:38,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 18:38:38,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:38:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:38,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:38:38,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906824115] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:38:38,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:38:38,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-12-06 18:38:38,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566944175] [2021-12-06 18:38:38,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:38:38,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:38:38,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:38:38,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:38:38,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:38:38,408 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:38,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:38:38,430 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-12-06 18:38:38,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:38:38,431 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 18:38:38,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:38:38,432 INFO L225 Difference]: With dead ends: 57 [2021-12-06 18:38:38,432 INFO L226 Difference]: Without dead ends: 57 [2021-12-06 18:38:38,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:38:38,432 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:38:38,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 48 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:38:38,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-06 18:38:38,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2021-12-06 18:38:38,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:38,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-12-06 18:38:38,436 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 11 [2021-12-06 18:38:38,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:38:38,436 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-12-06 18:38:38,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:38,436 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-12-06 18:38:38,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 18:38:38,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:38:38,437 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:38:38,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:38:38,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 18:38:38,638 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:38:38,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:38:38,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1333765681, now seen corresponding path program 1 times [2021-12-06 18:38:38,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:38:38,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733738930] [2021-12-06 18:38:38,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:38,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:38:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:38,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:38,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:38:38,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733738930] [2021-12-06 18:38:38,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733738930] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:38:38,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213468545] [2021-12-06 18:38:38,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:38,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:38:38,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:38:38,811 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:38:38,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:38:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:38,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 18:38:38,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:38:38,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:38:38,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:38,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:38:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:39,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213468545] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:38:39,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:38:39,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-12-06 18:38:39,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446357772] [2021-12-06 18:38:39,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:38:39,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 18:38:39,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:38:39,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 18:38:39,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:38:39,151 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:39,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:38:39,219 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-12-06 18:38:39,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:38:39,219 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 18:38:39,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:38:39,220 INFO L225 Difference]: With dead ends: 39 [2021-12-06 18:38:39,220 INFO L226 Difference]: Without dead ends: 39 [2021-12-06 18:38:39,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:38:39,221 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:38:39,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 33 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:38:39,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-06 18:38:39,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-12-06 18:38:39,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.21875) internal successors, (39), 35 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:39,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-12-06 18:38:39,225 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 11 [2021-12-06 18:38:39,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:38:39,225 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-12-06 18:38:39,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:39,225 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-12-06 18:38:39,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 18:38:39,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:38:39,226 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:38:39,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:38:39,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:38:39,427 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:38:39,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:38:39,429 INFO L85 PathProgramCache]: Analyzing trace with hash -2109737472, now seen corresponding path program 1 times [2021-12-06 18:38:39,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:38:39,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110205480] [2021-12-06 18:38:39,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:39,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:38:39,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:38:39,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:38:39,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110205480] [2021-12-06 18:38:39,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110205480] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:38:39,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:38:39,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:38:39,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674819005] [2021-12-06 18:38:39,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:38:39,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:38:39,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:38:39,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:38:39,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:38:39,581 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 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 18:38:39,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:38:39,594 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-12-06 18:38:39,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:38:39,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-06 18:38:39,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:38:39,595 INFO L225 Difference]: With dead ends: 35 [2021-12-06 18:38:39,595 INFO L226 Difference]: Without dead ends: 33 [2021-12-06 18:38:39,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:38:39,596 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:38:39,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 28 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:38:39,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-06 18:38:39,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-06 18:38:39,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:39,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-12-06 18:38:39,599 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 15 [2021-12-06 18:38:39,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:38:39,599 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-12-06 18:38:39,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 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 18:38:39,600 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-12-06 18:38:39,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 18:38:39,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:38:39,600 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:38:39,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 18:38:39,600 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:38:39,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:38:39,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1407328063, now seen corresponding path program 1 times [2021-12-06 18:38:39,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:38:39,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030731478] [2021-12-06 18:38:39,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:39,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:38:39,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:39,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:38:39,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030731478] [2021-12-06 18:38:39,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030731478] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:38:39,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878239423] [2021-12-06 18:38:39,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:39,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:38:39,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:38:39,855 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:38:39,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:38:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:39,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 18:38:39,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:38:40,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-06 18:38:40,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:38:40,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:38:40,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878239423] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:38:40,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:38:40,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 10 [2021-12-06 18:38:40,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636187988] [2021-12-06 18:38:40,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:38:40,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:38:40,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:38:40,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:38:40,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:38:40,017 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:40,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:38:40,060 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-12-06 18:38:40,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:38:40,060 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 18:38:40,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:38:40,060 INFO L225 Difference]: With dead ends: 36 [2021-12-06 18:38:40,061 INFO L226 Difference]: Without dead ends: 26 [2021-12-06 18:38:40,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:38:40,061 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:38:40,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 52 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:38:40,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-06 18:38:40,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-06 18:38:40,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:40,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-12-06 18:38:40,064 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 18 [2021-12-06 18:38:40,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:38:40,064 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-12-06 18:38:40,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:40,064 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-12-06 18:38:40,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 18:38:40,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:38:40,065 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:38:40,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:38:40,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:38:40,266 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:38:40,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:38:40,267 INFO L85 PathProgramCache]: Analyzing trace with hash 386259709, now seen corresponding path program 1 times [2021-12-06 18:38:40,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:38:40,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115353065] [2021-12-06 18:38:40,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:40,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:38:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:40,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:40,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:38:40,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115353065] [2021-12-06 18:38:40,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115353065] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:38:40,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549301911] [2021-12-06 18:38:40,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:40,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:38:40,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:38:40,620 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:38:40,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:38:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:40,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 18:38:40,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:38:40,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:38:40,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-06 18:38:40,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:40,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:38:40,857 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:38:40,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 70 [2021-12-06 18:38:40,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2021-12-06 18:38:40,888 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:38:40,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 101 [2021-12-06 18:38:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:40,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549301911] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:38:40,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:38:40,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2021-12-06 18:38:40,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217821830] [2021-12-06 18:38:40,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:38:40,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 18:38:40,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:38:40,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 18:38:40,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:38:40,966 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:41,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:38:41,082 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-12-06 18:38:41,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:38:41,083 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 18:38:41,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:38:41,083 INFO L225 Difference]: With dead ends: 36 [2021-12-06 18:38:41,083 INFO L226 Difference]: Without dead ends: 33 [2021-12-06 18:38:41,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2021-12-06 18:38:41,084 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:38:41,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 42 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:38:41,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-06 18:38:41,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2021-12-06 18:38:41,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 18:38:41,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-12-06 18:38:41,086 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 18 [2021-12-06 18:38:41,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:38:41,086 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-12-06 18:38:41,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:41,087 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-12-06 18:38:41,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 18:38:41,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:38:41,087 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:38:41,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:38:41,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 18:38:41,288 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:38:41,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:38:41,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1254493542, now seen corresponding path program 2 times [2021-12-06 18:38:41,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:38:41,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325060726] [2021-12-06 18:38:41,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:41,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:38:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:41,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:38:41,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325060726] [2021-12-06 18:38:41,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325060726] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:38:41,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909748452] [2021-12-06 18:38:41,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:38:41,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:38:41,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:38:41,452 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:38:41,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:38:41,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:38:41,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:38:41,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 18:38:41,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:38:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:41,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:38:41,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:38:41,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2021-12-06 18:38:41,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:41,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909748452] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:38:41,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:38:41,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2021-12-06 18:38:41,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512047014] [2021-12-06 18:38:41,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:38:41,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 18:38:41,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:38:41,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 18:38:41,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:38:41,740 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 16 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:41,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:38:41,911 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-12-06 18:38:41,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:38:41,911 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-06 18:38:41,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:38:41,911 INFO L225 Difference]: With dead ends: 36 [2021-12-06 18:38:41,912 INFO L226 Difference]: Without dead ends: 36 [2021-12-06 18:38:41,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-12-06 18:38:41,912 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 102 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:38:41,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 41 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:38:41,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-06 18:38:41,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-12-06 18:38:41,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 18:38:41,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-12-06 18:38:41,915 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 22 [2021-12-06 18:38:41,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:38:41,915 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-12-06 18:38:41,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:41,915 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-12-06 18:38:41,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 18:38:41,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:38:41,916 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:38:41,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 18:38:42,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 18:38:42,117 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:38:42,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:38:42,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1549441888, now seen corresponding path program 3 times [2021-12-06 18:38:42,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:38:42,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797505516] [2021-12-06 18:38:42,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:42,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:38:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:42,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:38:42,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797505516] [2021-12-06 18:38:42,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797505516] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:38:42,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035318146] [2021-12-06 18:38:42,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:38:42,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:38:42,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:38:42,417 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:38:42,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:38:42,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 18:38:42,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:38:42,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 18:38:42,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:38:42,605 INFO L354 Elim1Store]: treesize reduction 12, result has 20.0 percent of original size [2021-12-06 18:38:42,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-12-06 18:38:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:42,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:38:42,646 INFO L354 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2021-12-06 18:38:42,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 18:38:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:42,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035318146] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:38:42,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:38:42,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2021-12-06 18:38:42,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253276744] [2021-12-06 18:38:42,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:38:42,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 18:38:42,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:38:42,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 18:38:42,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-12-06 18:38:42,813 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 18:38:43,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:38:43,023 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2021-12-06 18:38:43,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 18:38:43,024 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-06 18:38:43,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:38:43,024 INFO L225 Difference]: With dead ends: 47 [2021-12-06 18:38:43,024 INFO L226 Difference]: Without dead ends: 37 [2021-12-06 18:38:43,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 18:38:43,025 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 83 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:38:43,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 52 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:38:43,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-06 18:38:43,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2021-12-06 18:38:43,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:43,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-12-06 18:38:43,028 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2021-12-06 18:38:43,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:38:43,028 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-12-06 18:38:43,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 18:38:43,029 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-12-06 18:38:43,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 18:38:43,029 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:38:43,029 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:38:43,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 18:38:43,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:38:43,231 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:38:43,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:38:43,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1131712419, now seen corresponding path program 4 times [2021-12-06 18:38:43,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:38:43,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619739669] [2021-12-06 18:38:43,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:43,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:38:43,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:43,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:38:43,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619739669] [2021-12-06 18:38:43,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619739669] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:38:43,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145014941] [2021-12-06 18:38:43,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:38:43,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:38:43,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:38:43,361 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:38:43,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 18:38:43,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:38:43,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:38:43,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 18:38:43,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:38:43,542 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:43,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:38:43,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:38:43,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2021-12-06 18:38:43,762 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:43,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145014941] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:38:43,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:38:43,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2021-12-06 18:38:43,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394105494] [2021-12-06 18:38:43,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:38:43,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 18:38:43,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:38:43,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 18:38:43,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-12-06 18:38:43,764 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 22 states, 21 states have (on average 4.238095238095238) internal successors, (89), 22 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:43,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:38:43,982 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-12-06 18:38:43,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 18:38:43,982 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.238095238095238) internal successors, (89), 22 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-06 18:38:43,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:38:43,983 INFO L225 Difference]: With dead ends: 48 [2021-12-06 18:38:43,983 INFO L226 Difference]: Without dead ends: 48 [2021-12-06 18:38:43,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-12-06 18:38:43,984 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 128 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:38:43,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 58 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:38:43,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-06 18:38:43,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-12-06 18:38:43,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:43,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-12-06 18:38:43,988 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 33 [2021-12-06 18:38:43,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:38:43,989 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-12-06 18:38:43,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.238095238095238) internal successors, (89), 22 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:43,989 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-12-06 18:38:43,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 18:38:43,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:38:43,990 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:38:44,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 18:38:44,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 18:38:44,192 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:38:44,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:38:44,193 INFO L85 PathProgramCache]: Analyzing trace with hash -128978377, now seen corresponding path program 5 times [2021-12-06 18:38:44,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:38:44,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865628537] [2021-12-06 18:38:44,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:44,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:38:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:44,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:38:44,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865628537] [2021-12-06 18:38:44,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865628537] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:38:44,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640547433] [2021-12-06 18:38:44,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:38:44,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:38:44,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:38:44,500 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:38:44,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 18:38:44,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 18:38:44,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:38:44,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 18:38:44,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:38:44,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:38:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:44,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:38:44,818 INFO L354 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2021-12-06 18:38:44,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 18:38:45,022 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:45,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640547433] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:38:45,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:38:45,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 29 [2021-12-06 18:38:45,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47418458] [2021-12-06 18:38:45,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:38:45,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 18:38:45,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:38:45,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 18:38:45,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-12-06 18:38:45,024 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 29 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:45,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:38:45,276 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2021-12-06 18:38:45,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 18:38:45,276 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 29 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-06 18:38:45,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:38:45,277 INFO L225 Difference]: With dead ends: 65 [2021-12-06 18:38:45,277 INFO L226 Difference]: Without dead ends: 48 [2021-12-06 18:38:45,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 18:38:45,278 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 70 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:38:45,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 100 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:38:45,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-06 18:38:45,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2021-12-06 18:38:45,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:45,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-12-06 18:38:45,280 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 40 [2021-12-06 18:38:45,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:38:45,281 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-12-06 18:38:45,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 29 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:45,281 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-12-06 18:38:45,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 18:38:45,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:38:45,282 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:38:45,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 18:38:45,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:38:45,482 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:38:45,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:38:45,483 INFO L85 PathProgramCache]: Analyzing trace with hash 749979156, now seen corresponding path program 6 times [2021-12-06 18:38:45,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:38:45,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501584343] [2021-12-06 18:38:45,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:45,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:38:45,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:45,611 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:45,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:38:45,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501584343] [2021-12-06 18:38:45,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501584343] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:38:45,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363700167] [2021-12-06 18:38:45,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:38:45,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:38:45,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:38:45,613 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:38:45,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 18:38:45,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-06 18:38:45,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:38:45,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 18:38:45,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:38:45,824 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:45,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:38:45,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:38:45,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2021-12-06 18:38:46,088 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:46,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363700167] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:38:46,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:38:46,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2021-12-06 18:38:46,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460596557] [2021-12-06 18:38:46,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:38:46,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 18:38:46,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:38:46,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 18:38:46,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2021-12-06 18:38:46,090 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 30 states, 29 states have (on average 4.310344827586207) internal successors, (125), 30 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:46,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:38:46,387 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2021-12-06 18:38:46,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 18:38:46,388 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.310344827586207) internal successors, (125), 30 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-06 18:38:46,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:38:46,388 INFO L225 Difference]: With dead ends: 59 [2021-12-06 18:38:46,388 INFO L226 Difference]: Without dead ends: 59 [2021-12-06 18:38:46,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=335, Invalid=1305, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 18:38:46,389 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 157 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:38:46,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 103 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:38:46,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-06 18:38:46,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2021-12-06 18:38:46,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:46,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-12-06 18:38:46,393 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 44 [2021-12-06 18:38:46,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:38:46,393 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-12-06 18:38:46,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.310344827586207) internal successors, (125), 30 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:46,394 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-12-06 18:38:46,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 18:38:46,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:38:46,395 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:38:46,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 18:38:46,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:38:46,597 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:38:46,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:38:46,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1410124454, now seen corresponding path program 7 times [2021-12-06 18:38:46,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:38:46,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683879507] [2021-12-06 18:38:46,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:46,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:38:46,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:46,836 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 16 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:46,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:38:46,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683879507] [2021-12-06 18:38:46,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683879507] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:38:46,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097852773] [2021-12-06 18:38:46,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:38:46,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:38:46,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:38:46,838 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:38:46,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 18:38:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:46,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 18:38:46,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:38:47,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:38:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 16 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:47,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:38:47,247 INFO L354 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2021-12-06 18:38:47,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 18:38:47,593 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 16 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:47,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097852773] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:38:47,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:38:47,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 40 [2021-12-06 18:38:47,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223751794] [2021-12-06 18:38:47,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:38:47,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 18:38:47,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:38:47,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 18:38:47,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1390, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 18:38:47,595 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 40 states, 40 states have (on average 3.25) internal successors, (130), 40 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:48,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:38:48,028 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2021-12-06 18:38:48,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 18:38:48,028 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.25) internal successors, (130), 40 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-06 18:38:48,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:38:48,029 INFO L225 Difference]: With dead ends: 83 [2021-12-06 18:38:48,029 INFO L226 Difference]: Without dead ends: 59 [2021-12-06 18:38:48,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=277, Invalid=2173, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 18:38:48,030 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 98 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:38:48,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 165 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:38:48,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-06 18:38:48,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-12-06 18:38:48,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 18:38:48,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-12-06 18:38:48,032 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 51 [2021-12-06 18:38:48,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:38:48,032 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-12-06 18:38:48,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.25) internal successors, (130), 40 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:48,033 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-12-06 18:38:48,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 18:38:48,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:38:48,033 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:38:48,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 18:38:48,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 18:38:48,235 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:38:48,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:38:48,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1552754007, now seen corresponding path program 8 times [2021-12-06 18:38:48,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:38:48,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617022151] [2021-12-06 18:38:48,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:48,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:38:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:48,416 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 18 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:48,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:38:48,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617022151] [2021-12-06 18:38:48,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617022151] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:38:48,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967703394] [2021-12-06 18:38:48,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:38:48,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:38:48,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:38:48,417 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:38:48,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 18:38:48,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:38:48,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:38:48,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 18:38:48,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:38:48,696 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 32 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:48,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:38:48,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:38:48,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2021-12-06 18:38:49,008 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 32 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:49,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967703394] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:38:49,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:38:49,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2021-12-06 18:38:49,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716397790] [2021-12-06 18:38:49,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:38:49,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 18:38:49,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:38:49,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 18:38:49,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 18:38:49,010 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 34 states, 33 states have (on average 4.696969696969697) internal successors, (155), 34 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:49,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:38:49,427 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-12-06 18:38:49,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 18:38:49,427 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 4.696969696969697) internal successors, (155), 34 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-06 18:38:49,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:38:49,428 INFO L225 Difference]: With dead ends: 70 [2021-12-06 18:38:49,428 INFO L226 Difference]: Without dead ends: 70 [2021-12-06 18:38:49,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=1848, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 18:38:49,429 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 162 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:38:49,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 130 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:38:49,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-06 18:38:49,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2021-12-06 18:38:49,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:49,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-12-06 18:38:49,431 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 55 [2021-12-06 18:38:49,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:38:49,432 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-12-06 18:38:49,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 4.696969696969697) internal successors, (155), 34 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:49,432 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-12-06 18:38:49,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 18:38:49,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:38:49,433 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:38:49,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 18:38:49,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 18:38:49,634 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:38:49,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:38:49,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1510058895, now seen corresponding path program 9 times [2021-12-06 18:38:49,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:38:49,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159863783] [2021-12-06 18:38:49,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:49,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:38:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:49,930 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 21 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:49,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:38:49,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159863783] [2021-12-06 18:38:49,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159863783] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:38:49,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442359155] [2021-12-06 18:38:49,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:38:49,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:38:49,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:38:49,932 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:38:49,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 18:38:50,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-06 18:38:50,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:38:50,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 18:38:50,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:38:50,475 INFO L354 Elim1Store]: treesize reduction 12, result has 20.0 percent of original size [2021-12-06 18:38:50,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-12-06 18:38:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 21 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:50,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:38:50,512 INFO L354 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2021-12-06 18:38:50,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 18:38:50,919 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 21 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:50,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442359155] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:38:50,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:38:50,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 44 [2021-12-06 18:38:50,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971962102] [2021-12-06 18:38:50,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:38:50,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 18:38:50,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:38:50,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 18:38:50,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1742, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 18:38:50,921 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 44 states, 44 states have (on average 3.8181818181818183) internal successors, (168), 44 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:51,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:38:51,568 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2021-12-06 18:38:51,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 18:38:51,569 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.8181818181818183) internal successors, (168), 44 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-06 18:38:51,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:38:51,569 INFO L225 Difference]: With dead ends: 101 [2021-12-06 18:38:51,569 INFO L226 Difference]: Without dead ends: 70 [2021-12-06 18:38:51,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=281, Invalid=3141, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 18:38:51,571 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 91 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:38:51,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 242 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:38:51,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-06 18:38:51,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2021-12-06 18:38:51,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:51,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2021-12-06 18:38:51,573 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2021-12-06 18:38:51,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:38:51,573 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2021-12-06 18:38:51,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.8181818181818183) internal successors, (168), 44 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:51,574 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2021-12-06 18:38:51,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 18:38:51,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:38:51,574 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:38:51,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 18:38:51,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:38:51,776 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:38:51,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:38:51,777 INFO L85 PathProgramCache]: Analyzing trace with hash 205730958, now seen corresponding path program 10 times [2021-12-06 18:38:51,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:38:51,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16105724] [2021-12-06 18:38:51,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:51,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:38:51,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 28 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:51,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:38:51,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16105724] [2021-12-06 18:38:51,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16105724] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:38:51,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713657384] [2021-12-06 18:38:51,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:38:51,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:38:51,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:38:51,998 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:38:51,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 18:38:52,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:38:52,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:38:52,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 18:38:52,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:38:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 50 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:52,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:38:52,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:38:52,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2021-12-06 18:38:52,853 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 50 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:52,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713657384] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:38:52,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:38:52,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 39 [2021-12-06 18:38:52,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407535676] [2021-12-06 18:38:52,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:38:52,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 18:38:52,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:38:52,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 18:38:52,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 18:38:52,855 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 40 states, 39 states have (on average 4.82051282051282) internal successors, (188), 40 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:53,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:38:53,635 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2021-12-06 18:38:53,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 18:38:53,636 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 4.82051282051282) internal successors, (188), 40 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-06 18:38:53,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:38:53,636 INFO L225 Difference]: With dead ends: 80 [2021-12-06 18:38:53,636 INFO L226 Difference]: Without dead ends: 80 [2021-12-06 18:38:53,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=503, Invalid=2803, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 18:38:53,638 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 210 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:38:53,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 235 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:38:53,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-06 18:38:53,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2021-12-06 18:38:53,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:53,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-12-06 18:38:53,640 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 66 [2021-12-06 18:38:53,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:38:53,640 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-12-06 18:38:53,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 4.82051282051282) internal successors, (188), 40 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:53,640 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-12-06 18:38:53,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 18:38:53,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:38:53,641 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:38:53,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 18:38:53,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:38:53,842 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:38:53,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:38:53,843 INFO L85 PathProgramCache]: Analyzing trace with hash -399180052, now seen corresponding path program 11 times [2021-12-06 18:38:53,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:38:53,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656200541] [2021-12-06 18:38:53,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:53,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:38:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 26 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:54,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:38:54,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656200541] [2021-12-06 18:38:54,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656200541] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:38:54,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136087490] [2021-12-06 18:38:54,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:38:54,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:38:54,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:38:54,144 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:38:54,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 18:38:54,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-06 18:38:54,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:38:54,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 18:38:54,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:38:54,705 INFO L354 Elim1Store]: treesize reduction 12, result has 20.0 percent of original size [2021-12-06 18:38:54,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-12-06 18:38:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 26 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:54,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:38:54,745 INFO L354 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2021-12-06 18:38:54,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 18:38:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 26 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:55,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136087490] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:38:55,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:38:55,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 50 [2021-12-06 18:38:55,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586377772] [2021-12-06 18:38:55,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:38:55,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 18:38:55,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:38:55,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 18:38:55,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2281, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 18:38:55,261 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 50 states, 50 states have (on average 4.02) internal successors, (201), 50 states have internal predecessors, (201), 0 states have call successors, (0), 0 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 18:38:56,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:38:56,047 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2021-12-06 18:38:56,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 18:38:56,047 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.02) internal successors, (201), 50 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-06 18:38:56,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:38:56,047 INFO L225 Difference]: With dead ends: 119 [2021-12-06 18:38:56,047 INFO L226 Difference]: Without dead ends: 81 [2021-12-06 18:38:56,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=315, Invalid=4107, Unknown=0, NotChecked=0, Total=4422 [2021-12-06 18:38:56,049 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 73 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:38:56,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 332 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1568 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:38:56,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-06 18:38:56,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-12-06 18:38:56,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:56,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-12-06 18:38:56,051 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 73 [2021-12-06 18:38:56,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:38:56,051 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-12-06 18:38:56,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.02) internal successors, (201), 50 states have internal predecessors, (201), 0 states have call successors, (0), 0 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 18:38:56,051 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-12-06 18:38:56,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-06 18:38:56,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:38:56,052 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:38:56,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-06 18:38:56,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:38:56,253 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:38:56,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:38:56,254 INFO L85 PathProgramCache]: Analyzing trace with hash -12330321, now seen corresponding path program 12 times [2021-12-06 18:38:56,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:38:56,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988953022] [2021-12-06 18:38:56,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:56,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:38:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:56,462 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 50 proven. 152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:56,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:38:56,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988953022] [2021-12-06 18:38:56,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988953022] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:38:56,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473312729] [2021-12-06 18:38:56,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:38:56,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:38:56,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:38:56,463 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:38:56,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 18:38:56,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-06 18:38:56,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:38:56,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 18:38:56,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:38:57,104 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 72 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:57,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:38:57,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:38:57,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2021-12-06 18:38:57,584 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 72 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:57,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473312729] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:38:57,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:38:57,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 47 [2021-12-06 18:38:57,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394026940] [2021-12-06 18:38:57,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:38:57,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 18:38:57,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:38:57,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 18:38:57,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1877, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 18:38:57,586 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 48 states, 47 states have (on average 4.76595744680851) internal successors, (224), 48 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:58,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:38:58,205 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2021-12-06 18:38:58,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 18:38:58,206 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.76595744680851) internal successors, (224), 48 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-06 18:38:58,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:38:58,206 INFO L225 Difference]: With dead ends: 92 [2021-12-06 18:38:58,206 INFO L226 Difference]: Without dead ends: 92 [2021-12-06 18:38:58,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=872, Invalid=3684, Unknown=0, NotChecked=0, Total=4556 [2021-12-06 18:38:58,208 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 265 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:38:58,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 188 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:38:58,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-06 18:38:58,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2021-12-06 18:38:58,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:58,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-12-06 18:38:58,210 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 77 [2021-12-06 18:38:58,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:38:58,210 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-12-06 18:38:58,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.76595744680851) internal successors, (224), 48 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:38:58,210 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-12-06 18:38:58,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 18:38:58,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:38:58,211 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:38:58,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 18:38:58,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:38:58,412 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:38:58,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:38:58,413 INFO L85 PathProgramCache]: Analyzing trace with hash -61578837, now seen corresponding path program 13 times [2021-12-06 18:38:58,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:38:58,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620289635] [2021-12-06 18:38:58,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:38:58,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:38:58,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 31 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:58,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:38:58,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620289635] [2021-12-06 18:38:58,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620289635] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:38:58,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034115332] [2021-12-06 18:38:58,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:38:58,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:38:58,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:38:58,762 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:38:58,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 18:38:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:38:58,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-06 18:38:58,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:38:59,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:38:59,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:38:59,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:38:59,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:38:59,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2021-12-06 18:38:59,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:38:59,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2021-12-06 18:38:59,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:38:59,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:38:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 31 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:38:59,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:39:03,731 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:39:03,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73426 treesize of output 71250 [2021-12-06 18:39:03,891 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-06 18:39:03,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:39:03,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-12-06 18:39:03,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002708725] [2021-12-06 18:39:03,892 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 18:39:03,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 18:39:03,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:39:03,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 18:39:03,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=3766, Unknown=1, NotChecked=0, Total=4160 [2021-12-06 18:39:03,894 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:39:04,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:39:04,639 INFO L93 Difference]: Finished difference Result 134 states and 135 transitions. [2021-12-06 18:39:04,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 18:39:04,640 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-06 18:39:04,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:39:04,640 INFO L225 Difference]: With dead ends: 134 [2021-12-06 18:39:04,640 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 18:39:04,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2138 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=502, Invalid=5349, Unknown=1, NotChecked=0, Total=5852 [2021-12-06 18:39:04,642 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 96 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:39:04,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 219 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:39:04,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 18:39:04,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-12-06 18:39:04,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:39:04,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2021-12-06 18:39:04,644 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2021-12-06 18:39:04,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:39:04,645 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2021-12-06 18:39:04,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:39:04,645 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2021-12-06 18:39:04,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-06 18:39:04,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:39:04,645 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:39:04,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 18:39:04,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-06 18:39:04,847 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:39:04,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:39:04,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1699716616, now seen corresponding path program 14 times [2021-12-06 18:39:04,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:39:04,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951069991] [2021-12-06 18:39:04,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:39:04,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:39:04,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:39:05,127 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 66 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:39:05,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:39:05,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951069991] [2021-12-06 18:39:05,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951069991] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:39:05,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573016219] [2021-12-06 18:39:05,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:39:05,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:39:05,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:39:05,129 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:39:05,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 18:39:05,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:39:05,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:39:05,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 18:39:05,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:39:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 98 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:39:05,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:39:06,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:39:06,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2021-12-06 18:39:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 98 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:39:06,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573016219] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:39:06,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:39:06,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 51 [2021-12-06 18:39:06,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453377432] [2021-12-06 18:39:06,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:39:06,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 18:39:06,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:39:06,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 18:39:06,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2353, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 18:39:06,432 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 52 states, 51 states have (on average 4.980392156862745) internal successors, (254), 52 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:39:07,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:39:07,737 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2021-12-06 18:39:07,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 18:39:07,737 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 4.980392156862745) internal successors, (254), 52 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-12-06 18:39:07,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:39:07,738 INFO L225 Difference]: With dead ends: 102 [2021-12-06 18:39:07,738 INFO L226 Difference]: Without dead ends: 102 [2021-12-06 18:39:07,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=825, Invalid=4875, Unknown=0, NotChecked=0, Total=5700 [2021-12-06 18:39:07,740 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 266 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 1611 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:39:07,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 374 Invalid, 1657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1611 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:39:07,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-06 18:39:07,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2021-12-06 18:39:07,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 18:39:07,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2021-12-06 18:39:07,742 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 88 [2021-12-06 18:39:07,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:39:07,742 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2021-12-06 18:39:07,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 4.980392156862745) internal successors, (254), 52 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:39:07,742 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2021-12-06 18:39:07,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 18:39:07,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:39:07,743 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:39:07,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-06 18:39:07,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 18:39:07,944 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:39:07,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:39:07,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1717557298, now seen corresponding path program 15 times [2021-12-06 18:39:07,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:39:07,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100732461] [2021-12-06 18:39:07,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:39:07,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:39:07,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:39:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 36 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:39:08,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:39:08,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100732461] [2021-12-06 18:39:08,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100732461] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:39:08,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977013604] [2021-12-06 18:39:08,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:39:08,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:39:08,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:39:08,317 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:39:08,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 18:39:08,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-06 18:39:08,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:39:08,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 18:39:08,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:39:09,570 INFO L354 Elim1Store]: treesize reduction 12, result has 20.0 percent of original size [2021-12-06 18:39:09,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-12-06 18:39:09,589 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 36 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:39:09,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:39:09,619 INFO L354 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2021-12-06 18:39:09,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 18:39:10,453 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 36 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:39:10,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977013604] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:39:10,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:39:10,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 61 [2021-12-06 18:39:10,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362263449] [2021-12-06 18:39:10,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:39:10,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-06 18:39:10,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:39:10,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-06 18:39:10,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=3463, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 18:39:10,455 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 61 states, 61 states have (on average 4.377049180327869) internal successors, (267), 61 states have internal predecessors, (267), 0 states have call successors, (0), 0 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 18:39:11,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:39:11,879 INFO L93 Difference]: Finished difference Result 155 states and 156 transitions. [2021-12-06 18:39:11,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 18:39:11,879 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 4.377049180327869) internal successors, (267), 61 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-06 18:39:11,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:39:11,880 INFO L225 Difference]: With dead ends: 155 [2021-12-06 18:39:11,880 INFO L226 Difference]: Without dead ends: 103 [2021-12-06 18:39:11,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=377, Invalid=6429, Unknown=0, NotChecked=0, Total=6806 [2021-12-06 18:39:11,882 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 132 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 2682 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 2708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:39:11,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 567 Invalid, 2708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2682 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 18:39:11,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-06 18:39:11,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2021-12-06 18:39:11,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:39:11,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2021-12-06 18:39:11,885 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 95 [2021-12-06 18:39:11,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:39:11,885 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2021-12-06 18:39:11,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 4.377049180327869) internal successors, (267), 61 states have internal predecessors, (267), 0 states have call successors, (0), 0 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 18:39:11,886 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2021-12-06 18:39:11,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-06 18:39:11,886 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:39:11,887 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:39:11,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 18:39:12,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 18:39:12,088 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:39:12,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:39:12,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1865404491, now seen corresponding path program 16 times [2021-12-06 18:39:12,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:39:12,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277795132] [2021-12-06 18:39:12,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:39:12,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:39:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:39:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 91 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:39:12,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:39:12,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277795132] [2021-12-06 18:39:12,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277795132] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:39:12,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630049850] [2021-12-06 18:39:12,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:39:12,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:39:12,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:39:12,416 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:39:12,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 18:39:12,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:39:12,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:39:12,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-06 18:39:12,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:39:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 128 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:39:13,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:39:13,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:39:13,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2021-12-06 18:39:13,882 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 128 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:39:13,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630049850] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:39:13,882 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:39:13,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 57 [2021-12-06 18:39:13,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143810776] [2021-12-06 18:39:13,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:39:13,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-06 18:39:13,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:39:13,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-06 18:39:13,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=2944, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 18:39:13,884 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 58 states, 57 states have (on average 5.035087719298246) internal successors, (287), 58 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:39:15,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:39:15,428 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2021-12-06 18:39:15,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 18:39:15,429 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 5.035087719298246) internal successors, (287), 58 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-12-06 18:39:15,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:39:15,429 INFO L225 Difference]: With dead ends: 113 [2021-12-06 18:39:15,429 INFO L226 Difference]: Without dead ends: 113 [2021-12-06 18:39:15,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1016, Invalid=6124, Unknown=0, NotChecked=0, Total=7140 [2021-12-06 18:39:15,430 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 333 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 1833 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 1890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:39:15,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 414 Invalid, 1890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1833 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:39:15,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-06 18:39:15,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 107. [2021-12-06 18:39:15,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:39:15,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2021-12-06 18:39:15,433 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 99 [2021-12-06 18:39:15,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:39:15,433 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2021-12-06 18:39:15,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 5.035087719298246) internal successors, (287), 58 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:39:15,433 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2021-12-06 18:39:15,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-06 18:39:15,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:39:15,434 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:39:15,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 18:39:15,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 18:39:15,635 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 18:39:15,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:39:15,636 INFO L85 PathProgramCache]: Analyzing trace with hash 141916645, now seen corresponding path program 17 times [2021-12-06 18:39:15,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:39:15,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275451958] [2021-12-06 18:39:15,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:39:15,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:39:15,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:39:16,091 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 41 proven. 373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:39:16,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:39:16,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275451958] [2021-12-06 18:39:16,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275451958] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:39:16,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733197620] [2021-12-06 18:39:16,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:39:16,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:39:16,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:39:16,092 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:39:16,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_341143c1-aeb2-43d2-95b0-401c16eb40f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 18:39:17,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-06 18:39:17,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:39:17,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-06 18:39:17,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:39:17,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:39:17,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:39:17,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:39:17,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:39:18,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:39:18,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:39:18,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:39:18,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:39:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 41 proven. 373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:39:18,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:39:23,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:39:23,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40170829119456 treesize of output 39062727557096