./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/lockfree-3.1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ca3938b0f6534ae49041ee4478e6c9d2d7ab3e84 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ca3938b0f6534ae49041ee4478e6c9d2d7ab3e84 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 08:08:46,128 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 08:08:46,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 08:08:46,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 08:08:46,155 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 08:08:46,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 08:08:46,158 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 08:08:46,160 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 08:08:46,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 08:08:46,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 08:08:46,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 08:08:46,165 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 08:08:46,166 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 08:08:46,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 08:08:46,168 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 08:08:46,169 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 08:08:46,170 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 08:08:46,171 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 08:08:46,173 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 08:08:46,175 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 08:08:46,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 08:08:46,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 08:08:46,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 08:08:46,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 08:08:46,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 08:08:46,184 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 08:08:46,185 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 08:08:46,186 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 08:08:46,186 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 08:08:46,187 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 08:08:46,187 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 08:08:46,188 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 08:08:46,189 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 08:08:46,190 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 08:08:46,191 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 08:08:46,191 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 08:08:46,191 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 08:08:46,191 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 08:08:46,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 08:08:46,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 08:08:46,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 08:08:46,194 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 08:08:46,216 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 08:08:46,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 08:08:46,217 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 08:08:46,218 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 08:08:46,218 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 08:08:46,218 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 08:08:46,218 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 08:08:46,218 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 08:08:46,218 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 08:08:46,219 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 08:08:46,219 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 08:08:46,219 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 08:08:46,219 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 08:08:46,219 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 08:08:46,220 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 08:08:46,220 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 08:08:46,220 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 08:08:46,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 08:08:46,221 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 08:08:46,221 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 08:08:46,221 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 08:08:46,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 08:08:46,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 08:08:46,222 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 08:08:46,222 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 08:08:46,222 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 08:08:46,222 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 08:08:46,222 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 08:08:46,222 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 08:08:46,223 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 08:08:46,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 08:08:46,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 08:08:46,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:08:46,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 08:08:46,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 08:08:46,224 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 08:08:46,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 08:08:46,224 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 08:08:46,224 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 08:08:46,224 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca3938b0f6534ae49041ee4478e6c9d2d7ab3e84 [2020-12-09 08:08:46,403 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 08:08:46,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 08:08:46,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 08:08:46,421 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 08:08:46,422 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 08:08:46,423 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/../../sv-benchmarks/c/memsafety/lockfree-3.1.i [2020-12-09 08:08:46,462 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/data/2908f9b54/77b9d0c303ea4669b6a09284b65c2a10/FLAGf38052a0c [2020-12-09 08:08:46,869 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 08:08:46,869 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/sv-benchmarks/c/memsafety/lockfree-3.1.i [2020-12-09 08:08:46,880 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/data/2908f9b54/77b9d0c303ea4669b6a09284b65c2a10/FLAGf38052a0c [2020-12-09 08:08:46,892 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/data/2908f9b54/77b9d0c303ea4669b6a09284b65c2a10 [2020-12-09 08:08:46,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 08:08:46,895 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 08:08:46,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 08:08:46,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 08:08:46,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 08:08:46,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:08:46" (1/1) ... [2020-12-09 08:08:46,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cb90ed9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:08:46, skipping insertion in model container [2020-12-09 08:08:46,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:08:46" (1/1) ... [2020-12-09 08:08:46,910 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 08:08:46,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 08:08:47,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:08:47,174 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 08:08:47,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:08:47,247 INFO L208 MainTranslator]: Completed translation [2020-12-09 08:08:47,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:08:47 WrapperNode [2020-12-09 08:08:47,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 08:08:47,248 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 08:08:47,248 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 08:08:47,248 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 08:08:47,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:08:47" (1/1) ... [2020-12-09 08:08:47,264 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:08:47" (1/1) ... [2020-12-09 08:08:47,280 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 08:08:47,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 08:08:47,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 08:08:47,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 08:08:47,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:08:47" (1/1) ... [2020-12-09 08:08:47,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:08:47" (1/1) ... [2020-12-09 08:08:47,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:08:47" (1/1) ... [2020-12-09 08:08:47,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:08:47" (1/1) ... [2020-12-09 08:08:47,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:08:47" (1/1) ... [2020-12-09 08:08:47,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:08:47" (1/1) ... [2020-12-09 08:08:47,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:08:47" (1/1) ... [2020-12-09 08:08:47,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 08:08:47,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 08:08:47,305 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 08:08:47,305 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 08:08:47,306 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:08:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:08:47,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 08:08:47,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 08:08:47,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 08:08:47,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 08:08:47,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 08:08:47,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 08:08:47,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 08:08:47,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 08:08:47,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 08:08:47,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 08:08:47,758 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 08:08:47,758 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-09 08:08:47,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:08:47 BoogieIcfgContainer [2020-12-09 08:08:47,760 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 08:08:47,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 08:08:47,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 08:08:47,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 08:08:47,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:08:46" (1/3) ... [2020-12-09 08:08:47,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2218b51a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:08:47, skipping insertion in model container [2020-12-09 08:08:47,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:08:47" (2/3) ... [2020-12-09 08:08:47,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2218b51a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:08:47, skipping insertion in model container [2020-12-09 08:08:47,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:08:47" (3/3) ... [2020-12-09 08:08:47,766 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.1.i [2020-12-09 08:08:47,776 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 08:08:47,778 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 20 error locations. [2020-12-09 08:08:47,786 INFO L253 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2020-12-09 08:08:47,801 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 08:08:47,801 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 08:08:47,802 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 08:08:47,802 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 08:08:47,802 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 08:08:47,802 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 08:08:47,802 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 08:08:47,802 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 08:08:47,812 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-12-09 08:08:47,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 08:08:47,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:08:47,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 08:08:47,817 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:08:47,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:08:47,821 INFO L82 PathProgramCache]: Analyzing trace with hash 5730039, now seen corresponding path program 1 times [2020-12-09 08:08:47,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:08:47,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680311243] [2020-12-09 08:08:47,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:08:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:08:47,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:08:47,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680311243] [2020-12-09 08:08:47,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:08:47,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 08:08:47,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926671400] [2020-12-09 08:08:47,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 08:08:47,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:08:47,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 08:08:47,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 08:08:47,943 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2020-12-09 08:08:47,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:08:47,953 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-12-09 08:08:47,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 08:08:47,954 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-12-09 08:08:47,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:08:47,960 INFO L225 Difference]: With dead ends: 47 [2020-12-09 08:08:47,960 INFO L226 Difference]: Without dead ends: 46 [2020-12-09 08:08:47,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 08:08:47,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-09 08:08:47,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-09 08:08:47,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-09 08:08:47,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2020-12-09 08:08:47,990 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 4 [2020-12-09 08:08:47,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:08:47,990 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2020-12-09 08:08:47,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 08:08:47,991 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2020-12-09 08:08:47,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 08:08:47,991 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:08:47,991 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 08:08:47,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 08:08:47,992 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:08:47,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:08:47,993 INFO L82 PathProgramCache]: Analyzing trace with hash 178885902, now seen corresponding path program 1 times [2020-12-09 08:08:47,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:08:47,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490511833] [2020-12-09 08:08:47,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:08:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:08:48,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:08:48,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490511833] [2020-12-09 08:08:48,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:08:48,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 08:08:48,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342345176] [2020-12-09 08:08:48,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 08:08:48,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:08:48,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 08:08:48,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 08:08:48,040 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 3 states. [2020-12-09 08:08:48,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:08:48,090 INFO L93 Difference]: Finished difference Result 84 states and 106 transitions. [2020-12-09 08:08:48,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 08:08:48,090 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 08:08:48,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:08:48,091 INFO L225 Difference]: With dead ends: 84 [2020-12-09 08:08:48,091 INFO L226 Difference]: Without dead ends: 83 [2020-12-09 08:08:48,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 08:08:48,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-09 08:08:48,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2020-12-09 08:08:48,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-09 08:08:48,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 96 transitions. [2020-12-09 08:08:48,099 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 96 transitions. Word has length 5 [2020-12-09 08:08:48,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:08:48,099 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 96 transitions. [2020-12-09 08:08:48,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 08:08:48,099 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 96 transitions. [2020-12-09 08:08:48,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 08:08:48,099 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:08:48,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 08:08:48,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 08:08:48,100 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:08:48,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:08:48,100 INFO L82 PathProgramCache]: Analyzing trace with hash 178884958, now seen corresponding path program 1 times [2020-12-09 08:08:48,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:08:48,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318446154] [2020-12-09 08:08:48,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:08:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:08:48,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:08:48,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318446154] [2020-12-09 08:08:48,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:08:48,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 08:08:48,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598190902] [2020-12-09 08:08:48,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 08:08:48,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:08:48,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 08:08:48,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 08:08:48,135 INFO L87 Difference]: Start difference. First operand 64 states and 96 transitions. Second operand 3 states. [2020-12-09 08:08:48,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:08:48,162 INFO L93 Difference]: Finished difference Result 116 states and 179 transitions. [2020-12-09 08:08:48,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 08:08:48,162 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 08:08:48,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:08:48,164 INFO L225 Difference]: With dead ends: 116 [2020-12-09 08:08:48,164 INFO L226 Difference]: Without dead ends: 115 [2020-12-09 08:08:48,164 INFO L677 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 [2020-12-09 08:08:48,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-09 08:08:48,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 97. [2020-12-09 08:08:48,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-09 08:08:48,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 166 transitions. [2020-12-09 08:08:48,174 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 166 transitions. Word has length 5 [2020-12-09 08:08:48,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:08:48,174 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 166 transitions. [2020-12-09 08:08:48,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 08:08:48,174 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 166 transitions. [2020-12-09 08:08:48,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 08:08:48,174 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:08:48,174 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 08:08:48,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 08:08:48,175 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:08:48,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:08:48,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1250409977, now seen corresponding path program 1 times [2020-12-09 08:08:48,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:08:48,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417610451] [2020-12-09 08:08:48,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:08:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:08:48,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:08:48,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417610451] [2020-12-09 08:08:48,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:08:48,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 08:08:48,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821205689] [2020-12-09 08:08:48,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 08:08:48,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:08:48,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 08:08:48,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 08:08:48,218 INFO L87 Difference]: Start difference. First operand 97 states and 166 transitions. Second operand 3 states. [2020-12-09 08:08:48,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:08:48,273 INFO L93 Difference]: Finished difference Result 146 states and 235 transitions. [2020-12-09 08:08:48,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 08:08:48,274 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-09 08:08:48,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:08:48,275 INFO L225 Difference]: With dead ends: 146 [2020-12-09 08:08:48,275 INFO L226 Difference]: Without dead ends: 146 [2020-12-09 08:08:48,276 INFO L677 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 [2020-12-09 08:08:48,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-09 08:08:48,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 127. [2020-12-09 08:08:48,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-09 08:08:48,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 223 transitions. [2020-12-09 08:08:48,288 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 223 transitions. Word has length 6 [2020-12-09 08:08:48,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:08:48,288 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 223 transitions. [2020-12-09 08:08:48,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 08:08:48,288 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 223 transitions. [2020-12-09 08:08:48,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 08:08:48,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:08:48,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 08:08:48,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 08:08:48,289 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:08:48,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:08:48,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1250409978, now seen corresponding path program 1 times [2020-12-09 08:08:48,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:08:48,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351149806] [2020-12-09 08:08:48,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:08:48,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:08:48,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:08:48,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351149806] [2020-12-09 08:08:48,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:08:48,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 08:08:48,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393259066] [2020-12-09 08:08:48,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 08:08:48,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:08:48,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 08:08:48,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 08:08:48,334 INFO L87 Difference]: Start difference. First operand 127 states and 223 transitions. Second operand 3 states. [2020-12-09 08:08:48,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:08:48,378 INFO L93 Difference]: Finished difference Result 141 states and 226 transitions. [2020-12-09 08:08:48,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 08:08:48,378 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-09 08:08:48,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:08:48,380 INFO L225 Difference]: With dead ends: 141 [2020-12-09 08:08:48,380 INFO L226 Difference]: Without dead ends: 141 [2020-12-09 08:08:48,380 INFO L677 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 [2020-12-09 08:08:48,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-09 08:08:48,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 125. [2020-12-09 08:08:48,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-09 08:08:48,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 215 transitions. [2020-12-09 08:08:48,390 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 215 transitions. Word has length 6 [2020-12-09 08:08:48,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:08:48,390 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 215 transitions. [2020-12-09 08:08:48,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 08:08:48,390 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 215 transitions. [2020-12-09 08:08:48,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 08:08:48,391 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:08:48,391 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:08:48,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 08:08:48,391 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:08:48,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:08:48,392 INFO L82 PathProgramCache]: Analyzing trace with hash 108011627, now seen corresponding path program 1 times [2020-12-09 08:08:48,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:08:48,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119669022] [2020-12-09 08:08:48,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:08:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:08:48,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:08:48,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119669022] [2020-12-09 08:08:48,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:08:48,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 08:08:48,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930706287] [2020-12-09 08:08:48,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:08:48,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:08:48,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:08:48,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:08:48,421 INFO L87 Difference]: Start difference. First operand 125 states and 215 transitions. Second operand 4 states. [2020-12-09 08:08:48,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:08:48,436 INFO L93 Difference]: Finished difference Result 136 states and 191 transitions. [2020-12-09 08:08:48,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:08:48,437 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 08:08:48,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:08:48,438 INFO L225 Difference]: With dead ends: 136 [2020-12-09 08:08:48,438 INFO L226 Difference]: Without dead ends: 136 [2020-12-09 08:08:48,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:08:48,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-09 08:08:48,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 79. [2020-12-09 08:08:48,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-09 08:08:48,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 124 transitions. [2020-12-09 08:08:48,443 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 124 transitions. Word has length 7 [2020-12-09 08:08:48,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:08:48,443 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 124 transitions. [2020-12-09 08:08:48,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:08:48,443 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 124 transitions. [2020-12-09 08:08:48,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 08:08:48,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:08:48,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:08:48,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 08:08:48,444 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:08:48,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:08:48,444 INFO L82 PathProgramCache]: Analyzing trace with hash -896205382, now seen corresponding path program 1 times [2020-12-09 08:08:48,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:08:48,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356155022] [2020-12-09 08:08:48,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:08:48,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:08:48,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:08:48,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356155022] [2020-12-09 08:08:48,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:08:48,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 08:08:48,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760289175] [2020-12-09 08:08:48,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:08:48,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:08:48,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:08:48,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:08:48,466 INFO L87 Difference]: Start difference. First operand 79 states and 124 transitions. Second operand 4 states. [2020-12-09 08:08:48,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:08:48,498 INFO L93 Difference]: Finished difference Result 173 states and 247 transitions. [2020-12-09 08:08:48,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 08:08:48,498 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-09 08:08:48,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:08:48,499 INFO L225 Difference]: With dead ends: 173 [2020-12-09 08:08:48,499 INFO L226 Difference]: Without dead ends: 173 [2020-12-09 08:08:48,499 INFO L677 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 [2020-12-09 08:08:48,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-12-09 08:08:48,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 113. [2020-12-09 08:08:48,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-09 08:08:48,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 173 transitions. [2020-12-09 08:08:48,503 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 173 transitions. Word has length 8 [2020-12-09 08:08:48,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:08:48,504 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 173 transitions. [2020-12-09 08:08:48,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:08:48,504 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 173 transitions. [2020-12-09 08:08:48,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 08:08:48,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:08:48,504 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:08:48,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 08:08:48,504 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:08:48,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:08:48,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1590894966, now seen corresponding path program 1 times [2020-12-09 08:08:48,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:08:48,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084128086] [2020-12-09 08:08:48,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:08:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:08:48,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:08:48,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084128086] [2020-12-09 08:08:48,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147322459] [2020-12-09 08:08:48,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:08:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:08:48,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 08:08:48,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:08:48,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:08:48,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:08:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:08:48,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1155470601] [2020-12-09 08:08:48,678 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 08:08:48,679 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:08:48,683 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:08:48,688 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:08:48,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:08:49,532 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:08:50,373 WARN L197 SmtUtils]: Spent 737.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 130 [2020-12-09 08:08:50,523 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2020-12-09 08:08:50,871 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:08:50,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 08:08:50,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2020-12-09 08:08:50,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967512151] [2020-12-09 08:08:50,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 08:08:50,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:08:50,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 08:08:50,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-12-09 08:08:50,872 INFO L87 Difference]: Start difference. First operand 113 states and 173 transitions. Second operand 7 states. [2020-12-09 08:08:50,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:08:50,901 INFO L93 Difference]: Finished difference Result 165 states and 235 transitions. [2020-12-09 08:08:50,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 08:08:50,902 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-12-09 08:08:50,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:08:50,903 INFO L225 Difference]: With dead ends: 165 [2020-12-09 08:08:50,903 INFO L226 Difference]: Without dead ends: 165 [2020-12-09 08:08:50,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-12-09 08:08:50,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-09 08:08:50,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 141. [2020-12-09 08:08:50,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-09 08:08:50,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 223 transitions. [2020-12-09 08:08:50,907 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 223 transitions. Word has length 11 [2020-12-09 08:08:50,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:08:50,907 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 223 transitions. [2020-12-09 08:08:50,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 08:08:50,907 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 223 transitions. [2020-12-09 08:08:50,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 08:08:50,908 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:08:50,908 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 08:08:51,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-09 08:08:51,110 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:08:51,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:08:51,111 INFO L82 PathProgramCache]: Analyzing trace with hash -862656011, now seen corresponding path program 1 times [2020-12-09 08:08:51,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:08:51,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661692969] [2020-12-09 08:08:51,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:08:51,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:08:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:08:51,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661692969] [2020-12-09 08:08:51,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694347266] [2020-12-09 08:08:51,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:08:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:08:51,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 08:08:51,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:08:51,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:08:51,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:08:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:08:51,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1828489254] [2020-12-09 08:08:51,259 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 08:08:51,259 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:08:51,259 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:08:51,259 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:08:51,259 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:08:51,487 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:08:51,958 WARN L197 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 101 [2020-12-09 08:08:52,125 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2020-12-09 08:08:52,457 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:08:52,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 08:08:52,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2020-12-09 08:08:52,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377015248] [2020-12-09 08:08:52,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 08:08:52,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:08:52,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 08:08:52,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-12-09 08:08:52,458 INFO L87 Difference]: Start difference. First operand 141 states and 223 transitions. Second operand 8 states. [2020-12-09 08:08:52,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:08:52,500 INFO L93 Difference]: Finished difference Result 285 states and 413 transitions. [2020-12-09 08:08:52,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 08:08:52,501 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-09 08:08:52,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:08:52,502 INFO L225 Difference]: With dead ends: 285 [2020-12-09 08:08:52,502 INFO L226 Difference]: Without dead ends: 285 [2020-12-09 08:08:52,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-12-09 08:08:52,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-12-09 08:08:52,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 207. [2020-12-09 08:08:52,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-12-09 08:08:52,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 318 transitions. [2020-12-09 08:08:52,507 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 318 transitions. Word has length 12 [2020-12-09 08:08:52,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:08:52,507 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 318 transitions. [2020-12-09 08:08:52,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 08:08:52,508 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 318 transitions. [2020-12-09 08:08:52,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 08:08:52,508 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:08:52,508 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1] [2020-12-09 08:08:52,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-09 08:08:52,710 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:08:52,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:08:52,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1208074064, now seen corresponding path program 2 times [2020-12-09 08:08:52,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:08:52,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830390837] [2020-12-09 08:08:52,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:08:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:08:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 08:08:52,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830390837] [2020-12-09 08:08:52,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838244873] [2020-12-09 08:08:52,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:08:52,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 08:08:52,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 08:08:52,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 08:08:52,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:08:52,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 08:08:52,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:08:52,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 08:08:52,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1035426307] [2020-12-09 08:08:52,842 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 08:08:52,842 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:08:52,842 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:08:52,842 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:08:52,842 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:08:53,011 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:08:53,474 WARN L197 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 101 [2020-12-09 08:08:53,635 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2020-12-09 08:08:53,991 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:08:53,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 08:08:53,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2020-12-09 08:08:53,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155293141] [2020-12-09 08:08:53,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 08:08:53,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:08:53,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 08:08:53,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-12-09 08:08:53,992 INFO L87 Difference]: Start difference. First operand 207 states and 318 transitions. Second operand 7 states. [2020-12-09 08:08:54,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:08:54,050 INFO L93 Difference]: Finished difference Result 387 states and 561 transitions. [2020-12-09 08:08:54,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 08:08:54,051 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-09 08:08:54,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:08:54,052 INFO L225 Difference]: With dead ends: 387 [2020-12-09 08:08:54,052 INFO L226 Difference]: Without dead ends: 387 [2020-12-09 08:08:54,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-12-09 08:08:54,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-12-09 08:08:54,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 207. [2020-12-09 08:08:54,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-12-09 08:08:54,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 318 transitions. [2020-12-09 08:08:54,057 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 318 transitions. Word has length 16 [2020-12-09 08:08:54,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:08:54,058 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 318 transitions. [2020-12-09 08:08:54,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 08:08:54,058 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 318 transitions. [2020-12-09 08:08:54,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 08:08:54,058 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:08:54,058 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 08:08:54,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:08:54,259 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:08:54,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:08:54,260 INFO L82 PathProgramCache]: Analyzing trace with hash 386641490, now seen corresponding path program 1 times [2020-12-09 08:08:54,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:08:54,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549479799] [2020-12-09 08:08:54,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:08:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:08:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:08:54,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549479799] [2020-12-09 08:08:54,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534589905] [2020-12-09 08:08:54,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:08:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:08:54,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-09 08:08:54,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:08:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:08:54,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:08:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:08:54,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1520389198] [2020-12-09 08:08:54,406 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 08:08:54,406 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:08:54,406 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:08:54,406 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:08:54,406 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:08:54,758 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:08:55,025 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2020-12-09 08:08:55,178 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2020-12-09 08:08:55,544 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:08:55,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 08:08:55,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 7] total 11 [2020-12-09 08:08:55,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357960026] [2020-12-09 08:08:55,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 08:08:55,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:08:55,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 08:08:55,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2020-12-09 08:08:55,546 INFO L87 Difference]: Start difference. First operand 207 states and 318 transitions. Second operand 12 states. [2020-12-09 08:08:55,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:08:55,876 INFO L93 Difference]: Finished difference Result 1238 states and 1785 transitions. [2020-12-09 08:08:55,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-09 08:08:55,878 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2020-12-09 08:08:55,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:08:55,883 INFO L225 Difference]: With dead ends: 1238 [2020-12-09 08:08:55,883 INFO L226 Difference]: Without dead ends: 1238 [2020-12-09 08:08:55,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=264, Invalid=1142, Unknown=0, NotChecked=0, Total=1406 [2020-12-09 08:08:55,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2020-12-09 08:08:55,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 469. [2020-12-09 08:08:55,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-12-09 08:08:55,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 744 transitions. [2020-12-09 08:08:55,896 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 744 transitions. Word has length 17 [2020-12-09 08:08:55,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:08:55,896 INFO L481 AbstractCegarLoop]: Abstraction has 469 states and 744 transitions. [2020-12-09 08:08:55,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 08:08:55,896 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 744 transitions. [2020-12-09 08:08:55,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 08:08:55,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:08:55,896 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:08:56,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:08:56,098 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:08:56,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:08:56,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1523044274, now seen corresponding path program 1 times [2020-12-09 08:08:56,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:08:56,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347674519] [2020-12-09 08:08:56,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:08:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:08:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:08:56,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347674519] [2020-12-09 08:08:56,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135944781] [2020-12-09 08:08:56,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:08:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:08:56,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 08:08:56,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:08:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:08:56,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:08:56,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:08:56,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1957504669] [2020-12-09 08:08:56,253 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2020-12-09 08:08:56,253 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:08:56,254 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:08:56,254 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:08:56,254 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:08:57,125 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:08:57,387 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 46 [2020-12-09 08:08:57,926 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:08:57,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 08:08:57,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2020-12-09 08:08:57,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228312160] [2020-12-09 08:08:57,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 08:08:57,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:08:57,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 08:08:57,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-12-09 08:08:57,927 INFO L87 Difference]: Start difference. First operand 469 states and 744 transitions. Second operand 6 states. [2020-12-09 08:08:57,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:08:57,967 INFO L93 Difference]: Finished difference Result 815 states and 1224 transitions. [2020-12-09 08:08:57,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 08:08:57,967 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-12-09 08:08:57,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:08:57,971 INFO L225 Difference]: With dead ends: 815 [2020-12-09 08:08:57,971 INFO L226 Difference]: Without dead ends: 815 [2020-12-09 08:08:57,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-12-09 08:08:57,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2020-12-09 08:08:57,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 631. [2020-12-09 08:08:57,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 631 states. [2020-12-09 08:08:57,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 992 transitions. [2020-12-09 08:08:57,983 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 992 transitions. Word has length 18 [2020-12-09 08:08:57,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:08:57,983 INFO L481 AbstractCegarLoop]: Abstraction has 631 states and 992 transitions. [2020-12-09 08:08:57,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 08:08:57,983 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 992 transitions. [2020-12-09 08:08:57,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-09 08:08:57,984 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:08:57,984 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:08:58,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-12-09 08:08:58,186 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:08:58,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:08:58,187 INFO L82 PathProgramCache]: Analyzing trace with hash -765059086, now seen corresponding path program 1 times [2020-12-09 08:08:58,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:08:58,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946330619] [2020-12-09 08:08:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:08:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:08:58,257 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 08:08:58,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946330619] [2020-12-09 08:08:58,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043558536] [2020-12-09 08:08:58,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:08:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:08:58,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 08:08:58,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:08:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 08:08:58,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:08:58,327 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 08:08:58,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1512625536] [2020-12-09 08:08:58,329 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-12-09 08:08:58,329 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:08:58,329 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:08:58,329 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:08:58,329 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:08:58,706 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:08:58,966 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2020-12-09 08:08:59,468 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:08:59,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 08:08:59,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2020-12-09 08:08:59,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499163197] [2020-12-09 08:08:59,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 08:08:59,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:08:59,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 08:08:59,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-12-09 08:08:59,469 INFO L87 Difference]: Start difference. First operand 631 states and 992 transitions. Second operand 6 states. [2020-12-09 08:08:59,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:08:59,523 INFO L93 Difference]: Finished difference Result 1293 states and 1910 transitions. [2020-12-09 08:08:59,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 08:08:59,523 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-12-09 08:08:59,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:08:59,528 INFO L225 Difference]: With dead ends: 1293 [2020-12-09 08:08:59,528 INFO L226 Difference]: Without dead ends: 1293 [2020-12-09 08:08:59,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-12-09 08:08:59,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2020-12-09 08:08:59,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 869. [2020-12-09 08:08:59,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 869 states. [2020-12-09 08:08:59,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1330 transitions. [2020-12-09 08:08:59,545 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1330 transitions. Word has length 20 [2020-12-09 08:08:59,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:08:59,545 INFO L481 AbstractCegarLoop]: Abstraction has 869 states and 1330 transitions. [2020-12-09 08:08:59,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 08:08:59,545 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1330 transitions. [2020-12-09 08:08:59,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-09 08:08:59,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:08:59,546 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:08:59,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-12-09 08:08:59,746 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:08:59,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:08:59,747 INFO L82 PathProgramCache]: Analyzing trace with hash -978991648, now seen corresponding path program 1 times [2020-12-09 08:08:59,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:08:59,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983918982] [2020-12-09 08:08:59,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:08:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:08:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 08:08:59,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983918982] [2020-12-09 08:08:59,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789063021] [2020-12-09 08:08:59,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:08:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:08:59,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 08:08:59,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:08:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:08:59,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:08:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:08:59,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1991978176] [2020-12-09 08:08:59,906 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-12-09 08:08:59,906 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:08:59,907 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:08:59,907 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:08:59,907 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:08:59,992 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 08:09:00,925 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:09:01,210 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 59 [2020-12-09 08:09:01,936 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:09:01,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 08:09:01,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2020-12-09 08:09:01,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470261746] [2020-12-09 08:09:01,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 08:09:01,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:09:01,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 08:09:01,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-12-09 08:09:01,937 INFO L87 Difference]: Start difference. First operand 869 states and 1330 transitions. Second operand 9 states. [2020-12-09 08:09:02,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:09:02,069 INFO L93 Difference]: Finished difference Result 1403 states and 2048 transitions. [2020-12-09 08:09:02,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 08:09:02,069 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-12-09 08:09:02,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:09:02,074 INFO L225 Difference]: With dead ends: 1403 [2020-12-09 08:09:02,074 INFO L226 Difference]: Without dead ends: 1403 [2020-12-09 08:09:02,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2020-12-09 08:09:02,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2020-12-09 08:09:02,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1361. [2020-12-09 08:09:02,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1361 states. [2020-12-09 08:09:02,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 2036 transitions. [2020-12-09 08:09:02,094 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 2036 transitions. Word has length 24 [2020-12-09 08:09:02,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:09:02,094 INFO L481 AbstractCegarLoop]: Abstraction has 1361 states and 2036 transitions. [2020-12-09 08:09:02,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 08:09:02,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 2036 transitions. [2020-12-09 08:09:02,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-09 08:09:02,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:09:02,095 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 08:09:02,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:09:02,296 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:09:02,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:09:02,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1877570643, now seen corresponding path program 2 times [2020-12-09 08:09:02,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:09:02,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923096210] [2020-12-09 08:09:02,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:09:02,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:02,316 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 08:09:02,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923096210] [2020-12-09 08:09:02,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474868996] [2020-12-09 08:09:02,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:09:02,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 08:09:02,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 08:09:02,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 08:09:02,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 08:09:02,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:09:02,412 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 08:09:02,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1881503401] [2020-12-09 08:09:02,414 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-12-09 08:09:02,414 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:09:02,414 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:09:02,414 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:09:02,414 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:09:02,784 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:09:03,037 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2020-12-09 08:09:03,587 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:09:03,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 08:09:03,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 10 [2020-12-09 08:09:03,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359201625] [2020-12-09 08:09:03,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 08:09:03,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:09:03,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 08:09:03,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-12-09 08:09:03,588 INFO L87 Difference]: Start difference. First operand 1361 states and 2036 transitions. Second operand 10 states. [2020-12-09 08:09:03,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:09:03,774 INFO L93 Difference]: Finished difference Result 2261 states and 3172 transitions. [2020-12-09 08:09:03,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-09 08:09:03,774 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-12-09 08:09:03,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:09:03,782 INFO L225 Difference]: With dead ends: 2261 [2020-12-09 08:09:03,783 INFO L226 Difference]: Without dead ends: 2261 [2020-12-09 08:09:03,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2020-12-09 08:09:03,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2020-12-09 08:09:03,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 1449. [2020-12-09 08:09:03,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1449 states. [2020-12-09 08:09:03,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 2081 transitions. [2020-12-09 08:09:03,817 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 2081 transitions. Word has length 24 [2020-12-09 08:09:03,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:09:03,817 INFO L481 AbstractCegarLoop]: Abstraction has 1449 states and 2081 transitions. [2020-12-09 08:09:03,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 08:09:03,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 2081 transitions. [2020-12-09 08:09:03,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-09 08:09:03,818 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:09:03,818 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:09:04,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:09:04,019 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:09:04,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:09:04,019 INFO L82 PathProgramCache]: Analyzing trace with hash 713559056, now seen corresponding path program 1 times [2020-12-09 08:09:04,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:09:04,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596672885] [2020-12-09 08:09:04,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:09:04,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 08:09:04,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596672885] [2020-12-09 08:09:04,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415295806] [2020-12-09 08:09:04,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:09:04,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:04,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 08:09:04,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:04,182 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 08:09:04,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:09:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 08:09:04,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1816266794] [2020-12-09 08:09:04,218 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-12-09 08:09:04,218 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:09:04,219 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:09:04,219 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:09:04,219 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:09:04,313 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 08:09:05,508 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:09:06,332 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:09:06,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 08:09:06,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2020-12-09 08:09:06,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914708386] [2020-12-09 08:09:06,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 08:09:06,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:09:06,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 08:09:06,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-12-09 08:09:06,334 INFO L87 Difference]: Start difference. First operand 1449 states and 2081 transitions. Second operand 9 states. [2020-12-09 08:09:06,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:09:06,454 INFO L93 Difference]: Finished difference Result 2031 states and 2809 transitions. [2020-12-09 08:09:06,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 08:09:06,455 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-12-09 08:09:06,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:09:06,462 INFO L225 Difference]: With dead ends: 2031 [2020-12-09 08:09:06,462 INFO L226 Difference]: Without dead ends: 2031 [2020-12-09 08:09:06,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-12-09 08:09:06,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2020-12-09 08:09:06,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1809. [2020-12-09 08:09:06,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1809 states. [2020-12-09 08:09:06,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 2523 transitions. [2020-12-09 08:09:06,482 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 2523 transitions. Word has length 30 [2020-12-09 08:09:06,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:09:06,482 INFO L481 AbstractCegarLoop]: Abstraction has 1809 states and 2523 transitions. [2020-12-09 08:09:06,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 08:09:06,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 2523 transitions. [2020-12-09 08:09:06,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-09 08:09:06,483 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:09:06,483 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-09 08:09:06,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2020-12-09 08:09:06,685 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:09:06,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:09:06,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1252699892, now seen corresponding path program 1 times [2020-12-09 08:09:06,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:09:06,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183088851] [2020-12-09 08:09:06,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:09:06,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 08:09:06,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183088851] [2020-12-09 08:09:06,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893817785] [2020-12-09 08:09:06,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:09:06,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:06,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 08:09:06,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 08:09:06,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:09:06,847 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 08:09:06,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [165865405] [2020-12-09 08:09:06,848 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-12-09 08:09:06,848 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:09:06,848 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:09:06,849 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:09:06,849 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:09:07,147 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:09:07,526 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 67 [2020-12-09 08:09:08,076 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:09:08,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 08:09:08,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2020-12-09 08:09:08,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975072909] [2020-12-09 08:09:08,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 08:09:08,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:09:08,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 08:09:08,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-12-09 08:09:08,077 INFO L87 Difference]: Start difference. First operand 1809 states and 2523 transitions. Second operand 10 states. [2020-12-09 08:09:08,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:09:08,203 INFO L93 Difference]: Finished difference Result 4473 states and 6122 transitions. [2020-12-09 08:09:08,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-09 08:09:08,204 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-12-09 08:09:08,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:09:08,218 INFO L225 Difference]: With dead ends: 4473 [2020-12-09 08:09:08,219 INFO L226 Difference]: Without dead ends: 4473 [2020-12-09 08:09:08,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 79 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2020-12-09 08:09:08,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4473 states. [2020-12-09 08:09:08,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4473 to 2955. [2020-12-09 08:09:08,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2955 states. [2020-12-09 08:09:08,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 4171 transitions. [2020-12-09 08:09:08,256 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 4171 transitions. Word has length 31 [2020-12-09 08:09:08,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:09:08,256 INFO L481 AbstractCegarLoop]: Abstraction has 2955 states and 4171 transitions. [2020-12-09 08:09:08,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 08:09:08,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 4171 transitions. [2020-12-09 08:09:08,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-09 08:09:08,257 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:09:08,257 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:09:08,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:09:08,458 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:09:08,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:09:08,458 INFO L82 PathProgramCache]: Analyzing trace with hash 666371421, now seen corresponding path program 1 times [2020-12-09 08:09:08,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:09:08,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575684256] [2020-12-09 08:09:08,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:09:08,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 39 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-09 08:09:08,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575684256] [2020-12-09 08:09:08,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518318118] [2020-12-09 08:09:08,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:09:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:08,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-09 08:09:08,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 35 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 08:09:08,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:09:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 33 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 08:09:08,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [671614464] [2020-12-09 08:09:08,786 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-12-09 08:09:08,786 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:09:08,787 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:09:08,787 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:09:08,787 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:09:10,261 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:09:10,551 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 46 [2020-12-09 08:09:10,890 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-12-09 08:09:11,509 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:09:11,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 08:09:11,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2020-12-09 08:09:11,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589728074] [2020-12-09 08:09:11,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-09 08:09:11,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:09:11,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-09 08:09:11,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2020-12-09 08:09:11,511 INFO L87 Difference]: Start difference. First operand 2955 states and 4171 transitions. Second operand 20 states. [2020-12-09 08:09:12,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:09:12,963 INFO L93 Difference]: Finished difference Result 7480 states and 10559 transitions. [2020-12-09 08:09:12,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-09 08:09:12,964 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-12-09 08:09:12,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:09:12,988 INFO L225 Difference]: With dead ends: 7480 [2020-12-09 08:09:12,989 INFO L226 Difference]: Without dead ends: 7480 [2020-12-09 08:09:12,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 101 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2321 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=967, Invalid=4885, Unknown=0, NotChecked=0, Total=5852 [2020-12-09 08:09:12,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7480 states. [2020-12-09 08:09:13,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7480 to 5834. [2020-12-09 08:09:13,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5834 states. [2020-12-09 08:09:13,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5834 states to 5834 states and 8416 transitions. [2020-12-09 08:09:13,054 INFO L78 Accepts]: Start accepts. Automaton has 5834 states and 8416 transitions. Word has length 38 [2020-12-09 08:09:13,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:09:13,054 INFO L481 AbstractCegarLoop]: Abstraction has 5834 states and 8416 transitions. [2020-12-09 08:09:13,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-09 08:09:13,054 INFO L276 IsEmpty]: Start isEmpty. Operand 5834 states and 8416 transitions. [2020-12-09 08:09:13,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-09 08:09:13,055 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:09:13,055 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:09:13,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable634 [2020-12-09 08:09:13,256 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:09:13,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:09:13,257 INFO L82 PathProgramCache]: Analyzing trace with hash 986540679, now seen corresponding path program 2 times [2020-12-09 08:09:13,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:09:13,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750472311] [2020-12-09 08:09:13,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:09:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 08:09:13,310 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 08:09:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 08:09:13,336 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 08:09:13,358 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 08:09:13,359 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 08:09:13,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable853 [2020-12-09 08:09:13,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:09:13 BoogieIcfgContainer [2020-12-09 08:09:13,403 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 08:09:13,403 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 08:09:13,403 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 08:09:13,403 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 08:09:13,404 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:08:47" (3/4) ... [2020-12-09 08:09:13,406 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 08:09:13,406 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 08:09:13,406 INFO L168 Benchmark]: Toolchain (without parser) took 26510.86 ms. Allocated memory was 94.4 MB in the beginning and 299.9 MB in the end (delta: 205.5 MB). Free memory was 64.2 MB in the beginning and 189.5 MB in the end (delta: -125.3 MB). Peak memory consumption was 81.4 MB. Max. memory is 16.1 GB. [2020-12-09 08:09:13,406 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 94.4 MB. Free memory is still 72.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:09:13,407 INFO L168 Benchmark]: CACSL2BoogieTranslator took 350.77 ms. Allocated memory is still 94.4 MB. Free memory was 64.1 MB in the beginning and 63.5 MB in the end (delta: 568.6 kB). Peak memory consumption was 17.8 MB. Max. memory is 16.1 GB. [2020-12-09 08:09:13,407 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.43 ms. Allocated memory is still 94.4 MB. Free memory was 63.5 MB in the beginning and 61.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:09:13,407 INFO L168 Benchmark]: Boogie Preprocessor took 23.63 ms. Allocated memory is still 94.4 MB. Free memory was 61.5 MB in the beginning and 59.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:09:13,407 INFO L168 Benchmark]: RCFGBuilder took 454.53 ms. Allocated memory was 94.4 MB in the beginning and 117.4 MB in the end (delta: 23.1 MB). Free memory was 59.6 MB in the beginning and 91.5 MB in the end (delta: -31.9 MB). Peak memory consumption was 20.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:09:13,407 INFO L168 Benchmark]: TraceAbstraction took 25641.79 ms. Allocated memory was 117.4 MB in the beginning and 299.9 MB in the end (delta: 182.5 MB). Free memory was 90.9 MB in the beginning and 189.5 MB in the end (delta: -98.6 MB). Peak memory consumption was 83.3 MB. Max. memory is 16.1 GB. [2020-12-09 08:09:13,407 INFO L168 Benchmark]: Witness Printer took 2.74 ms. Allocated memory is still 299.9 MB. Free memory is still 189.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:09:13,408 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 94.4 MB. Free memory is still 72.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 350.77 ms. Allocated memory is still 94.4 MB. Free memory was 64.1 MB in the beginning and 63.5 MB in the end (delta: 568.6 kB). Peak memory consumption was 17.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.43 ms. Allocated memory is still 94.4 MB. Free memory was 63.5 MB in the beginning and 61.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.63 ms. Allocated memory is still 94.4 MB. Free memory was 61.5 MB in the beginning and 59.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 454.53 ms. Allocated memory was 94.4 MB in the beginning and 117.4 MB in the end (delta: 23.1 MB). Free memory was 59.6 MB in the beginning and 91.5 MB in the end (delta: -31.9 MB). Peak memory consumption was 20.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 25641.79 ms. Allocated memory was 117.4 MB in the beginning and 299.9 MB in the end (delta: 182.5 MB). Free memory was 90.9 MB in the beginning and 189.5 MB in the end (delta: -98.6 MB). Peak memory consumption was 83.3 MB. Max. memory is 16.1 GB. * Witness Printer took 2.74 ms. Allocated memory is still 299.9 MB. Free memory is still 189.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L538] x1->data = 0 VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L541] case 2: VAL [garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L542] x1->data = 4 VAL [garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L545] t1 = S VAL [garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: VAL [garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L548] x1->next = t1 VAL [garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: [L551] COND TRUE S == t1 [L552] S = x1 VAL [garbage={0:0}, pc1=6, pc4=1, res4=0, S={-2:0}, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [garbage={0:0}, pc1=6, pc4=1, res4=0, S={-2:0}, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: [L556] case 6: [L557] pc1 = 1 VAL [garbage={0:0}, pc1=1, pc4=1, res4=0, S={-2:0}, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [garbage={0:0}, pc1=1, pc4=1, res4=0, S={-2:0}, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L594] COND FALSE !(1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 47 locations, 20 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 25.5s, OverallIterations: 19, TraceHistogramMax: 7, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1487 SDtfs, 4400 SDslu, 4588 SDs, 0 SdLazy, 1247 SolverSat, 395 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 935 GetRequests, 575 SyntacticMatches, 57 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3872 ImplicationChecksByTransitivity, 12.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5834occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 18 MinimizatonAttempts, 6088 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 568 NumberOfCodeBlocks, 556 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 724 ConstructedInterpolants, 0 QuantifiedInterpolants, 66290 SizeOfPredicates, 61 NumberOfNonLiveVariables, 1473 ConjunctsInSsa, 119 ConjunctsInUnsatCore, 40 InterpolantComputations, 7 PerfectInterpolantSequences, 523/720 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 08:09:15,024 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 08:09:15,026 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 08:09:15,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 08:09:15,056 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 08:09:15,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 08:09:15,059 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 08:09:15,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 08:09:15,063 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 08:09:15,064 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 08:09:15,065 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 08:09:15,067 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 08:09:15,067 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 08:09:15,068 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 08:09:15,069 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 08:09:15,071 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 08:09:15,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 08:09:15,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 08:09:15,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 08:09:15,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 08:09:15,079 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 08:09:15,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 08:09:15,081 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 08:09:15,082 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 08:09:15,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 08:09:15,085 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 08:09:15,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 08:09:15,086 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 08:09:15,086 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 08:09:15,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 08:09:15,088 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 08:09:15,088 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 08:09:15,089 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 08:09:15,090 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 08:09:15,090 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 08:09:15,091 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 08:09:15,091 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 08:09:15,091 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 08:09:15,091 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 08:09:15,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 08:09:15,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 08:09:15,093 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2020-12-09 08:09:15,112 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 08:09:15,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 08:09:15,112 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 08:09:15,113 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 08:09:15,113 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 08:09:15,113 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 08:09:15,113 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 08:09:15,113 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 08:09:15,113 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 08:09:15,114 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 08:09:15,114 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 08:09:15,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 08:09:15,114 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 08:09:15,114 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 08:09:15,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 08:09:15,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 08:09:15,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 08:09:15,115 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 08:09:15,115 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 08:09:15,115 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 08:09:15,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 08:09:15,115 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 08:09:15,115 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 08:09:15,115 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 08:09:15,115 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 08:09:15,116 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 08:09:15,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 08:09:15,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 08:09:15,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 08:09:15,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:09:15,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 08:09:15,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 08:09:15,116 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 08:09:15,117 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 08:09:15,117 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 08:09:15,117 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 08:09:15,117 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca3938b0f6534ae49041ee4478e6c9d2d7ab3e84 [2020-12-09 08:09:15,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 08:09:15,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 08:09:15,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 08:09:15,388 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 08:09:15,388 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 08:09:15,389 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/../../sv-benchmarks/c/memsafety/lockfree-3.1.i [2020-12-09 08:09:15,434 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/data/fc1a6d554/9f7ca1472cde45e8a7c5656bf4ced493/FLAGf697badd5 [2020-12-09 08:09:15,880 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 08:09:15,880 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/sv-benchmarks/c/memsafety/lockfree-3.1.i [2020-12-09 08:09:15,892 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/data/fc1a6d554/9f7ca1472cde45e8a7c5656bf4ced493/FLAGf697badd5 [2020-12-09 08:09:15,903 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/data/fc1a6d554/9f7ca1472cde45e8a7c5656bf4ced493 [2020-12-09 08:09:15,905 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 08:09:15,906 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 08:09:15,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 08:09:15,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 08:09:15,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 08:09:15,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:09:15" (1/1) ... [2020-12-09 08:09:15,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@135bf615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:09:15, skipping insertion in model container [2020-12-09 08:09:15,911 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:09:15" (1/1) ... [2020-12-09 08:09:15,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 08:09:15,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 08:09:16,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:09:16,161 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 08:09:16,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:09:16,257 INFO L208 MainTranslator]: Completed translation [2020-12-09 08:09:16,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:09:16 WrapperNode [2020-12-09 08:09:16,257 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 08:09:16,259 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 08:09:16,259 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 08:09:16,259 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 08:09:16,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:09:16" (1/1) ... [2020-12-09 08:09:16,284 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:09:16" (1/1) ... [2020-12-09 08:09:16,310 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 08:09:16,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 08:09:16,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 08:09:16,311 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 08:09:16,319 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:09:16" (1/1) ... [2020-12-09 08:09:16,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:09:16" (1/1) ... [2020-12-09 08:09:16,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:09:16" (1/1) ... [2020-12-09 08:09:16,324 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:09:16" (1/1) ... [2020-12-09 08:09:16,333 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:09:16" (1/1) ... [2020-12-09 08:09:16,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:09:16" (1/1) ... [2020-12-09 08:09:16,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:09:16" (1/1) ... [2020-12-09 08:09:16,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 08:09:16,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 08:09:16,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 08:09:16,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 08:09:16,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:09:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:09:16,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-09 08:09:16,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 08:09:16,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 08:09:16,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 08:09:16,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 08:09:16,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 08:09:16,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-12-09 08:09:16,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 08:09:16,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 08:09:16,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 08:09:16,761 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 08:09:16,761 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-09 08:09:16,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:09:16 BoogieIcfgContainer [2020-12-09 08:09:16,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 08:09:16,764 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 08:09:16,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 08:09:16,766 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 08:09:16,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:09:15" (1/3) ... [2020-12-09 08:09:16,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f4b0b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:09:16, skipping insertion in model container [2020-12-09 08:09:16,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:09:16" (2/3) ... [2020-12-09 08:09:16,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f4b0b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:09:16, skipping insertion in model container [2020-12-09 08:09:16,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:09:16" (3/3) ... [2020-12-09 08:09:16,768 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.1.i [2020-12-09 08:09:16,777 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 08:09:16,780 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 20 error locations. [2020-12-09 08:09:16,787 INFO L253 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2020-12-09 08:09:16,801 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 08:09:16,801 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 08:09:16,801 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 08:09:16,802 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 08:09:16,802 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 08:09:16,802 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 08:09:16,802 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 08:09:16,802 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 08:09:16,812 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2020-12-09 08:09:16,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 08:09:16,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:09:16,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 08:09:16,817 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:09:16,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:09:16,820 INFO L82 PathProgramCache]: Analyzing trace with hash 28701576, now seen corresponding path program 1 times [2020-12-09 08:09:16,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:09:16,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1290601467] [2020-12-09 08:09:16,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 08:09:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:16,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 08:09:16,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:16,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:09:16,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1290601467] [2020-12-09 08:09:16,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:09:16,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 08:09:16,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440888259] [2020-12-09 08:09:16,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 08:09:16,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:09:16,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 08:09:16,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 08:09:16,932 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 3 states. [2020-12-09 08:09:16,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:09:16,980 INFO L93 Difference]: Finished difference Result 103 states and 135 transitions. [2020-12-09 08:09:16,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 08:09:16,982 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 08:09:16,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:09:16,989 INFO L225 Difference]: With dead ends: 103 [2020-12-09 08:09:16,989 INFO L226 Difference]: Without dead ends: 101 [2020-12-09 08:09:16,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 08:09:17,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-09 08:09:17,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2020-12-09 08:09:17,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-09 08:09:17,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 125 transitions. [2020-12-09 08:09:17,017 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 125 transitions. Word has length 5 [2020-12-09 08:09:17,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:09:17,017 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 125 transitions. [2020-12-09 08:09:17,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 08:09:17,018 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 125 transitions. [2020-12-09 08:09:17,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 08:09:17,018 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:09:17,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 08:09:17,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 08:09:17,220 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:09:17,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:09:17,223 INFO L82 PathProgramCache]: Analyzing trace with hash 889747453, now seen corresponding path program 1 times [2020-12-09 08:09:17,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:09:17,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905511444] [2020-12-09 08:09:17,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 08:09:17,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:17,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 08:09:17,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:17,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:17,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:09:17,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905511444] [2020-12-09 08:09:17,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:09:17,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 08:09:17,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436611075] [2020-12-09 08:09:17,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 08:09:17,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:09:17,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 08:09:17,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 08:09:17,404 INFO L87 Difference]: Start difference. First operand 83 states and 125 transitions. Second operand 3 states. [2020-12-09 08:09:17,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:09:17,521 INFO L93 Difference]: Finished difference Result 155 states and 235 transitions. [2020-12-09 08:09:17,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 08:09:17,521 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-09 08:09:17,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:09:17,523 INFO L225 Difference]: With dead ends: 155 [2020-12-09 08:09:17,523 INFO L226 Difference]: Without dead ends: 152 [2020-12-09 08:09:17,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 08:09:17,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-09 08:09:17,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 132. [2020-12-09 08:09:17,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-09 08:09:17,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 221 transitions. [2020-12-09 08:09:17,534 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 221 transitions. Word has length 6 [2020-12-09 08:09:17,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:09:17,534 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 221 transitions. [2020-12-09 08:09:17,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 08:09:17,534 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 221 transitions. [2020-12-09 08:09:17,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 08:09:17,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:09:17,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 08:09:17,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 08:09:17,736 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:09:17,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:09:17,738 INFO L82 PathProgramCache]: Analyzing trace with hash 889692424, now seen corresponding path program 1 times [2020-12-09 08:09:17,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:09:17,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [934653957] [2020-12-09 08:09:17,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 08:09:17,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:17,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 08:09:17,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:17,880 INFO L382 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 [2020-12-09 08:09:17,881 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:09:17,883 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:09:17,883 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 08:09:17,883 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-12-09 08:09:17,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:17,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:09:17,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [934653957] [2020-12-09 08:09:17,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:09:17,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 08:09:17,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778282493] [2020-12-09 08:09:17,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 08:09:17,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:09:17,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 08:09:17,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 08:09:17,888 INFO L87 Difference]: Start difference. First operand 132 states and 221 transitions. Second operand 3 states. [2020-12-09 08:09:18,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:09:18,008 INFO L93 Difference]: Finished difference Result 199 states and 318 transitions. [2020-12-09 08:09:18,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 08:09:18,008 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-09 08:09:18,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:09:18,010 INFO L225 Difference]: With dead ends: 199 [2020-12-09 08:09:18,010 INFO L226 Difference]: Without dead ends: 199 [2020-12-09 08:09:18,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 08:09:18,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-12-09 08:09:18,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 178. [2020-12-09 08:09:18,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-09 08:09:18,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 304 transitions. [2020-12-09 08:09:18,020 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 304 transitions. Word has length 6 [2020-12-09 08:09:18,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:09:18,020 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 304 transitions. [2020-12-09 08:09:18,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 08:09:18,021 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 304 transitions. [2020-12-09 08:09:18,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 08:09:18,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:09:18,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 08:09:18,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 08:09:18,222 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:09:18,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:09:18,223 INFO L82 PathProgramCache]: Analyzing trace with hash 889692425, now seen corresponding path program 1 times [2020-12-09 08:09:18,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:09:18,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090503177] [2020-12-09 08:09:18,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-09 08:09:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:18,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 08:09:18,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:18,305 INFO L382 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 [2020-12-09 08:09:18,306 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:09:18,311 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:09:18,312 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 08:09:18,313 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:11 [2020-12-09 08:09:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:18,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:09:18,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090503177] [2020-12-09 08:09:18,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:09:18,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 08:09:18,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867080957] [2020-12-09 08:09:18,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 08:09:18,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:09:18,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 08:09:18,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 08:09:18,321 INFO L87 Difference]: Start difference. First operand 178 states and 304 transitions. Second operand 3 states. [2020-12-09 08:09:18,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:09:18,436 INFO L93 Difference]: Finished difference Result 194 states and 309 transitions. [2020-12-09 08:09:18,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 08:09:18,437 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-09 08:09:18,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:09:18,438 INFO L225 Difference]: With dead ends: 194 [2020-12-09 08:09:18,438 INFO L226 Difference]: Without dead ends: 194 [2020-12-09 08:09:18,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 08:09:18,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-12-09 08:09:18,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 176. [2020-12-09 08:09:18,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-12-09 08:09:18,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 296 transitions. [2020-12-09 08:09:18,447 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 296 transitions. Word has length 6 [2020-12-09 08:09:18,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:09:18,447 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 296 transitions. [2020-12-09 08:09:18,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 08:09:18,448 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 296 transitions. [2020-12-09 08:09:18,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 08:09:18,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:09:18,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:09:18,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-09 08:09:18,650 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:09:18,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:09:18,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1810669365, now seen corresponding path program 1 times [2020-12-09 08:09:18,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:09:18,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323586797] [2020-12-09 08:09:18,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-09 08:09:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:18,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 08:09:18,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:18,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:18,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:09:18,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323586797] [2020-12-09 08:09:18,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:09:18,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 08:09:18,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326956781] [2020-12-09 08:09:18,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:09:18,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:09:18,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:09:18,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:09:18,762 INFO L87 Difference]: Start difference. First operand 176 states and 296 transitions. Second operand 4 states. [2020-12-09 08:09:18,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:09:18,809 INFO L93 Difference]: Finished difference Result 197 states and 290 transitions. [2020-12-09 08:09:18,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 08:09:18,809 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 08:09:18,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:09:18,811 INFO L225 Difference]: With dead ends: 197 [2020-12-09 08:09:18,811 INFO L226 Difference]: Without dead ends: 197 [2020-12-09 08:09:18,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 08:09:18,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-09 08:09:18,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 134. [2020-12-09 08:09:18,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-09 08:09:18,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 219 transitions. [2020-12-09 08:09:18,817 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 219 transitions. Word has length 7 [2020-12-09 08:09:18,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:09:18,817 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 219 transitions. [2020-12-09 08:09:18,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:09:18,817 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 219 transitions. [2020-12-09 08:09:18,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 08:09:18,818 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:09:18,818 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:09:19,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-09 08:09:19,020 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:09:19,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:09:19,021 INFO L82 PathProgramCache]: Analyzing trace with hash 346576936, now seen corresponding path program 1 times [2020-12-09 08:09:19,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:09:19,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1517983677] [2020-12-09 08:09:19,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-09 08:09:19,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:19,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 08:09:19,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:19,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:19,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:09:19,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1517983677] [2020-12-09 08:09:19,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:09:19,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 08:09:19,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733430912] [2020-12-09 08:09:19,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:09:19,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:09:19,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:09:19,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:09:19,154 INFO L87 Difference]: Start difference. First operand 134 states and 219 transitions. Second operand 4 states. [2020-12-09 08:09:19,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:09:19,185 INFO L93 Difference]: Finished difference Result 251 states and 398 transitions. [2020-12-09 08:09:19,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 08:09:19,185 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-09 08:09:19,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:09:19,187 INFO L225 Difference]: With dead ends: 251 [2020-12-09 08:09:19,187 INFO L226 Difference]: Without dead ends: 251 [2020-12-09 08:09:19,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 08:09:19,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-12-09 08:09:19,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 178. [2020-12-09 08:09:19,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-09 08:09:19,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 288 transitions. [2020-12-09 08:09:19,192 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 288 transitions. Word has length 8 [2020-12-09 08:09:19,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:09:19,192 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 288 transitions. [2020-12-09 08:09:19,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:09:19,193 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 288 transitions. [2020-12-09 08:09:19,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 08:09:19,193 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:09:19,193 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:09:19,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-09 08:09:19,395 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:09:19,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:09:19,396 INFO L82 PathProgramCache]: Analyzing trace with hash 212840816, now seen corresponding path program 1 times [2020-12-09 08:09:19,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:09:19,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44848391] [2020-12-09 08:09:19,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-12-09 08:09:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:19,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 08:09:19,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:19,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:09:19,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:19,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44848391] [2020-12-09 08:09:19,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1306303764] [2020-12-09 08:09:19,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt [2020-12-09 08:09:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:19,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 08:09:19,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:19,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:19,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:09:19,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:19,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12405905] [2020-12-09 08:09:19,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:09:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:19,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 08:09:19,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:19,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:19,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:09:19,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:19,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 08:09:19,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2020-12-09 08:09:19,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428914913] [2020-12-09 08:09:19,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 08:09:19,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:09:19,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 08:09:19,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-09 08:09:19,752 INFO L87 Difference]: Start difference. First operand 178 states and 288 transitions. Second operand 10 states. [2020-12-09 08:09:19,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:09:19,954 INFO L93 Difference]: Finished difference Result 709 states and 1136 transitions. [2020-12-09 08:09:19,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-09 08:09:19,955 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2020-12-09 08:09:19,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:09:19,958 INFO L225 Difference]: With dead ends: 709 [2020-12-09 08:09:19,958 INFO L226 Difference]: Without dead ends: 709 [2020-12-09 08:09:19,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-12-09 08:09:19,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2020-12-09 08:09:19,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 388. [2020-12-09 08:09:19,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-12-09 08:09:19,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 640 transitions. [2020-12-09 08:09:19,968 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 640 transitions. Word has length 11 [2020-12-09 08:09:19,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:09:19,969 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 640 transitions. [2020-12-09 08:09:19,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 08:09:19,969 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 640 transitions. [2020-12-09 08:09:19,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 08:09:19,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:09:19,969 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:09:20,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt,8 mathsat -unsat_core_generation=3,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:09:20,573 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:09:20,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:09:20,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1598757208, now seen corresponding path program 1 times [2020-12-09 08:09:20,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:09:20,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612748231] [2020-12-09 08:09:20,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2020-12-09 08:09:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:20,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 08:09:20,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:20,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:09:20,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:20,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612748231] [2020-12-09 08:09:20,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1569092802] [2020-12-09 08:09:20,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt [2020-12-09 08:09:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:20,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 08:09:20,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:20,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:20,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:09:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:20,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161286089] [2020-12-09 08:09:20,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:09:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:20,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 08:09:20,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:20,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:09:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:20,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 08:09:20,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 5 [2020-12-09 08:09:20,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224481945] [2020-12-09 08:09:20,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 08:09:20,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:09:20,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 08:09:20,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-09 08:09:20,869 INFO L87 Difference]: Start difference. First operand 388 states and 640 transitions. Second operand 6 states. [2020-12-09 08:09:20,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:09:20,904 INFO L93 Difference]: Finished difference Result 906 states and 1442 transitions. [2020-12-09 08:09:20,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 08:09:20,905 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-09 08:09:20,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:09:20,909 INFO L225 Difference]: With dead ends: 906 [2020-12-09 08:09:20,909 INFO L226 Difference]: Without dead ends: 906 [2020-12-09 08:09:20,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 08:09:20,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-12-09 08:09:20,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 882. [2020-12-09 08:09:20,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 882 states. [2020-12-09 08:09:20,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1442 transitions. [2020-12-09 08:09:20,924 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1442 transitions. Word has length 11 [2020-12-09 08:09:20,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:09:20,924 INFO L481 AbstractCegarLoop]: Abstraction has 882 states and 1442 transitions. [2020-12-09 08:09:20,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 08:09:20,924 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1442 transitions. [2020-12-09 08:09:20,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 08:09:20,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:09:20,925 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:09:21,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 mathsat -unsat_core_generation=3,12 cvc4 --incremental --print-success --lang smt [2020-12-09 08:09:21,527 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:09:21,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:09:21,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1435756047, now seen corresponding path program 1 times [2020-12-09 08:09:21,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:09:21,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799202382] [2020-12-09 08:09:21,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2020-12-09 08:09:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:21,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 08:09:21,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:21,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:09:21,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:21,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799202382] [2020-12-09 08:09:21,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1448497347] [2020-12-09 08:09:21,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt [2020-12-09 08:09:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:21,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 08:09:21,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:21,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:09:21,774 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:21,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972418384] [2020-12-09 08:09:21,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:09:21,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:21,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 08:09:21,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:21,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:21,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:09:21,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:21,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 08:09:21,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2020-12-09 08:09:21,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5221035] [2020-12-09 08:09:21,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:09:21,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:09:21,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:09:21,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:09:21,842 INFO L87 Difference]: Start difference. First operand 882 states and 1442 transitions. Second operand 4 states. [2020-12-09 08:09:21,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:09:21,907 INFO L93 Difference]: Finished difference Result 1116 states and 1755 transitions. [2020-12-09 08:09:21,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:09:21,908 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-09 08:09:21,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:09:21,914 INFO L225 Difference]: With dead ends: 1116 [2020-12-09 08:09:21,914 INFO L226 Difference]: Without dead ends: 1116 [2020-12-09 08:09:21,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 08:09:21,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2020-12-09 08:09:21,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 993. [2020-12-09 08:09:21,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 993 states. [2020-12-09 08:09:21,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1575 transitions. [2020-12-09 08:09:21,931 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1575 transitions. Word has length 16 [2020-12-09 08:09:21,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:09:21,931 INFO L481 AbstractCegarLoop]: Abstraction has 993 states and 1575 transitions. [2020-12-09 08:09:21,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:09:21,931 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1575 transitions. [2020-12-09 08:09:21,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 08:09:21,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:09:21,932 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:09:22,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 mathsat -unsat_core_generation=3,15 cvc4 --incremental --print-success --lang smt [2020-12-09 08:09:22,534 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:09:22,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:09:22,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1786470878, now seen corresponding path program 1 times [2020-12-09 08:09:22,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:09:22,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982041894] [2020-12-09 08:09:22,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/mathsat Starting monitored process 17 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with mathsat -unsat_core_generation=3 [2020-12-09 08:09:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:22,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 08:09:22,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:22,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:22,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:09:22,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:22,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982041894] [2020-12-09 08:09:22,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1483269797] [2020-12-09 08:09:22,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/cvc4 Starting monitored process 18 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4 --incremental --print-success --lang smt [2020-12-09 08:09:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:22,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 08:09:22,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:22,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:09:22,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:22,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633062689] [2020-12-09 08:09:22,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:09:22,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:22,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 08:09:22,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:22,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:22,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:09:22,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:22,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 08:09:22,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2020-12-09 08:09:22,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335637291] [2020-12-09 08:09:22,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 08:09:22,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:09:22,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 08:09:22,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-09 08:09:22,818 INFO L87 Difference]: Start difference. First operand 993 states and 1575 transitions. Second operand 10 states. [2020-12-09 08:09:23,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:09:23,029 INFO L93 Difference]: Finished difference Result 1571 states and 2386 transitions. [2020-12-09 08:09:23,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-09 08:09:23,029 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-12-09 08:09:23,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:09:23,035 INFO L225 Difference]: With dead ends: 1571 [2020-12-09 08:09:23,036 INFO L226 Difference]: Without dead ends: 1571 [2020-12-09 08:09:23,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2020-12-09 08:09:23,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2020-12-09 08:09:23,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 954. [2020-12-09 08:09:23,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 954 states. [2020-12-09 08:09:23,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1497 transitions. [2020-12-09 08:09:23,056 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1497 transitions. Word has length 19 [2020-12-09 08:09:23,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:09:23,056 INFO L481 AbstractCegarLoop]: Abstraction has 954 states and 1497 transitions. [2020-12-09 08:09:23,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 08:09:23,056 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1497 transitions. [2020-12-09 08:09:23,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-09 08:09:23,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:09:23,057 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:09:23,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 mathsat -unsat_core_generation=3,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 cvc4 --incremental --print-success --lang smt [2020-12-09 08:09:23,659 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:09:23,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:09:23,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1138871677, now seen corresponding path program 1 times [2020-12-09 08:09:23,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:09:23,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746639638] [2020-12-09 08:09:23,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/mathsat Starting monitored process 20 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with mathsat -unsat_core_generation=3 [2020-12-09 08:09:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:23,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 08:09:23,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:23,800 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 08:09:23,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:09:23,832 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 08:09:23,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746639638] [2020-12-09 08:09:23,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1745284445] [2020-12-09 08:09:23,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/cvc4 Starting monitored process 21 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4 --incremental --print-success --lang smt [2020-12-09 08:09:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:23,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 08:09:23,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 08:09:23,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:09:23,954 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 08:09:23,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975013642] [2020-12-09 08:09:23,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:09:24,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:24,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 08:09:24,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-09 08:09:24,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:09:24,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2020-12-09 08:09:24,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 5, 5] total 10 [2020-12-09 08:09:24,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876169106] [2020-12-09 08:09:24,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:09:24,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:09:24,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:09:24,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-09 08:09:24,036 INFO L87 Difference]: Start difference. First operand 954 states and 1497 transitions. Second operand 4 states. [2020-12-09 08:09:24,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:09:24,079 INFO L93 Difference]: Finished difference Result 1142 states and 1797 transitions. [2020-12-09 08:09:24,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:09:24,079 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-12-09 08:09:24,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:09:24,084 INFO L225 Difference]: With dead ends: 1142 [2020-12-09 08:09:24,084 INFO L226 Difference]: Without dead ends: 1142 [2020-12-09 08:09:24,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-12-09 08:09:24,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2020-12-09 08:09:24,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 1045. [2020-12-09 08:09:24,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1045 states. [2020-12-09 08:09:24,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 1647 transitions. [2020-12-09 08:09:24,100 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 1647 transitions. Word has length 26 [2020-12-09 08:09:24,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:09:24,100 INFO L481 AbstractCegarLoop]: Abstraction has 1045 states and 1647 transitions. [2020-12-09 08:09:24,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:09:24,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 1647 transitions. [2020-12-09 08:09:24,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-09 08:09:24,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:09:24,101 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:09:24,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 mathsat -unsat_core_generation=3,21 cvc4 --incremental --print-success --lang smt,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:09:24,702 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:09:24,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:09:24,704 INFO L82 PathProgramCache]: Analyzing trace with hash 2109480555, now seen corresponding path program 1 times [2020-12-09 08:09:24,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:09:24,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656334586] [2020-12-09 08:09:24,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/mathsat Starting monitored process 23 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with mathsat -unsat_core_generation=3 [2020-12-09 08:09:24,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:24,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 08:09:24,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 08:09:24,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:09:24,835 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 08:09:24,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656334586] [2020-12-09 08:09:24,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1381120205] [2020-12-09 08:09:24,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/cvc4 Starting monitored process 24 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with cvc4 --incremental --print-success --lang smt [2020-12-09 08:09:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:24,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 08:09:24,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:24,925 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 08:09:24,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:09:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 08:09:24,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20539671] [2020-12-09 08:09:24,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:09:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:24,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 08:09:24,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:25,019 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:25,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:09:25,056 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:25,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 08:09:25,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 7, 7] total 13 [2020-12-09 08:09:25,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805766995] [2020-12-09 08:09:25,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-09 08:09:25,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:09:25,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-09 08:09:25,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-12-09 08:09:25,058 INFO L87 Difference]: Start difference. First operand 1045 states and 1647 transitions. Second operand 14 states. [2020-12-09 08:09:25,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:09:25,507 INFO L93 Difference]: Finished difference Result 3229 states and 4954 transitions. [2020-12-09 08:09:25,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-09 08:09:25,507 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-12-09 08:09:25,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:09:25,519 INFO L225 Difference]: With dead ends: 3229 [2020-12-09 08:09:25,519 INFO L226 Difference]: Without dead ends: 3229 [2020-12-09 08:09:25,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=863, Unknown=0, NotChecked=0, Total=1122 [2020-12-09 08:09:25,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3229 states. [2020-12-09 08:09:25,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3229 to 2176. [2020-12-09 08:09:25,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2176 states. [2020-12-09 08:09:25,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 3384 transitions. [2020-12-09 08:09:25,555 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 3384 transitions. Word has length 26 [2020-12-09 08:09:25,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:09:25,555 INFO L481 AbstractCegarLoop]: Abstraction has 2176 states and 3384 transitions. [2020-12-09 08:09:25,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-09 08:09:25,555 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 3384 transitions. [2020-12-09 08:09:25,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-09 08:09:25,556 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:09:25,556 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:09:26,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 mathsat -unsat_core_generation=3,24 cvc4 --incremental --print-success --lang smt,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:09:26,158 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:09:26,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:09:26,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1959825045, now seen corresponding path program 1 times [2020-12-09 08:09:26,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:09:26,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595658806] [2020-12-09 08:09:26,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/mathsat Starting monitored process 26 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with mathsat -unsat_core_generation=3 [2020-12-09 08:09:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:26,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 08:09:26,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:26,342 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 08:09:26,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:09:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 08:09:26,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595658806] [2020-12-09 08:09:26,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1648187366] [2020-12-09 08:09:26,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/cvc4 Starting monitored process 27 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with cvc4 --incremental --print-success --lang smt [2020-12-09 08:09:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:26,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 08:09:26,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:26,467 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 08:09:26,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:09:26,493 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 08:09:26,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629996542] [2020-12-09 08:09:26,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:09:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:26,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 08:09:26,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:26,576 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-09 08:09:26,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:09:26,591 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-09 08:09:26,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 08:09:26,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 4, 4] total 10 [2020-12-09 08:09:26,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163055951] [2020-12-09 08:09:26,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 08:09:26,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:09:26,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 08:09:26,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-09 08:09:26,593 INFO L87 Difference]: Start difference. First operand 2176 states and 3384 transitions. Second operand 10 states. [2020-12-09 08:09:28,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:09:28,479 INFO L93 Difference]: Finished difference Result 8175 states and 12968 transitions. [2020-12-09 08:09:28,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-09 08:09:28,479 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-12-09 08:09:28,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:09:28,510 INFO L225 Difference]: With dead ends: 8175 [2020-12-09 08:09:28,510 INFO L226 Difference]: Without dead ends: 8175 [2020-12-09 08:09:28,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=367, Invalid=1795, Unknown=0, NotChecked=0, Total=2162 [2020-12-09 08:09:28,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8175 states. [2020-12-09 08:09:28,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8175 to 5811. [2020-12-09 08:09:28,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5811 states. [2020-12-09 08:09:28,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5811 states to 5811 states and 9208 transitions. [2020-12-09 08:09:28,598 INFO L78 Accepts]: Start accepts. Automaton has 5811 states and 9208 transitions. Word has length 34 [2020-12-09 08:09:28,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:09:28,598 INFO L481 AbstractCegarLoop]: Abstraction has 5811 states and 9208 transitions. [2020-12-09 08:09:28,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 08:09:28,599 INFO L276 IsEmpty]: Start isEmpty. Operand 5811 states and 9208 transitions. [2020-12-09 08:09:28,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-09 08:09:28,599 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:09:28,599 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:09:29,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 cvc4 --incremental --print-success --lang smt,26 mathsat -unsat_core_generation=3 [2020-12-09 08:09:29,202 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:09:29,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:09:29,203 INFO L82 PathProgramCache]: Analyzing trace with hash -681445988, now seen corresponding path program 1 times [2020-12-09 08:09:29,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:09:29,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834733324] [2020-12-09 08:09:29,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/mathsat Starting monitored process 29 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with mathsat -unsat_core_generation=3 [2020-12-09 08:09:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:29,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 08:09:29,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:29,336 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:29,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:09:29,360 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:29,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834733324] [2020-12-09 08:09:29,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [72259527] [2020-12-09 08:09:29,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/cvc4 Starting monitored process 30 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with cvc4 --incremental --print-success --lang smt [2020-12-09 08:09:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:29,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 08:09:29,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:29,466 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:29,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:09:29,501 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:29,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747709168] [2020-12-09 08:09:29,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:09:29,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:09:29,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 08:09:29,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:09:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:29,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:09:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:09:29,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 08:09:29,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2020-12-09 08:09:29,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357847881] [2020-12-09 08:09:29,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-09 08:09:29,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:09:29,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-09 08:09:29,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-12-09 08:09:29,665 INFO L87 Difference]: Start difference. First operand 5811 states and 9208 transitions. Second operand 16 states. [2020-12-09 08:09:30,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:09:30,271 INFO L93 Difference]: Finished difference Result 9407 states and 15038 transitions. [2020-12-09 08:09:30,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-09 08:09:30,271 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-12-09 08:09:30,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:09:30,308 INFO L225 Difference]: With dead ends: 9407 [2020-12-09 08:09:30,309 INFO L226 Difference]: Without dead ends: 9407 [2020-12-09 08:09:30,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 194 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=430, Invalid=1826, Unknown=0, NotChecked=0, Total=2256 [2020-12-09 08:09:30,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9407 states. [2020-12-09 08:09:30,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9407 to 6518. [2020-12-09 08:09:30,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6518 states. [2020-12-09 08:09:30,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6518 states to 6518 states and 10287 transitions. [2020-12-09 08:09:30,404 INFO L78 Accepts]: Start accepts. Automaton has 6518 states and 10287 transitions. Word has length 36 [2020-12-09 08:09:30,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:09:30,404 INFO L481 AbstractCegarLoop]: Abstraction has 6518 states and 10287 transitions. [2020-12-09 08:09:30,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-09 08:09:30,404 INFO L276 IsEmpty]: Start isEmpty. Operand 6518 states and 10287 transitions. [2020-12-09 08:09:30,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-09 08:09:30,405 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:09:30,405 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:09:31,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 cvc4 --incremental --print-success --lang smt,29 mathsat -unsat_core_generation=3,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:09:31,007 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 08:09:31,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:09:31,008 INFO L82 PathProgramCache]: Analyzing trace with hash 812497874, now seen corresponding path program 1 times [2020-12-09 08:09:31,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:09:31,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [769391110] [2020-12-09 08:09:31,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fedfe60e-318e-4de5-bf4c-217e207efec6/bin/utaipan/mathsat Starting monitored process 32 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with mathsat -unsat_core_generation=3 [2020-12-09 08:09:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 08:09:31,188 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 08:09:31,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 08:09:31,237 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 08:09:31,288 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 08:09:31,288 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 08:09:31,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 mathsat -unsat_core_generation=3 [2020-12-09 08:09:31,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:09:31 BoogieIcfgContainer [2020-12-09 08:09:31,573 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 08:09:31,573 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 08:09:31,573 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 08:09:31,573 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 08:09:31,574 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:09:16" (3/4) ... [2020-12-09 08:09:31,576 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 08:09:31,576 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 08:09:31,577 INFO L168 Benchmark]: Toolchain (without parser) took 15670.92 ms. Allocated memory was 58.7 MB in the beginning and 130.0 MB in the end (delta: 71.3 MB). Free memory was 36.8 MB in the beginning and 65.7 MB in the end (delta: -28.9 MB). Peak memory consumption was 43.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:09:31,578 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 58.7 MB. Free memory was 41.5 MB in the beginning and 41.4 MB in the end (delta: 73.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:09:31,578 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.12 ms. Allocated memory is still 58.7 MB. Free memory was 36.6 MB in the beginning and 28.2 MB in the end (delta: 8.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 08:09:31,578 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.83 ms. Allocated memory was 58.7 MB in the beginning and 88.1 MB in the end (delta: 29.4 MB). Free memory was 27.9 MB in the beginning and 71.0 MB in the end (delta: -43.0 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2020-12-09 08:09:31,579 INFO L168 Benchmark]: Boogie Preprocessor took 33.31 ms. Allocated memory is still 88.1 MB. Free memory was 71.0 MB in the beginning and 69.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:09:31,579 INFO L168 Benchmark]: RCFGBuilder took 417.70 ms. Allocated memory is still 88.1 MB. Free memory was 69.2 MB in the beginning and 61.5 MB in the end (delta: 7.7 MB). Peak memory consumption was 22.4 MB. Max. memory is 16.1 GB. [2020-12-09 08:09:31,580 INFO L168 Benchmark]: TraceAbstraction took 14809.07 ms. Allocated memory was 88.1 MB in the beginning and 130.0 MB in the end (delta: 41.9 MB). Free memory was 60.9 MB in the beginning and 65.7 MB in the end (delta: -4.8 MB). Peak memory consumption was 72.9 MB. Max. memory is 16.1 GB. [2020-12-09 08:09:31,580 INFO L168 Benchmark]: Witness Printer took 3.27 ms. Allocated memory is still 130.0 MB. Free memory is still 65.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:09:31,582 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 58.7 MB. Free memory was 41.5 MB in the beginning and 41.4 MB in the end (delta: 73.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 351.12 ms. Allocated memory is still 58.7 MB. Free memory was 36.6 MB in the beginning and 28.2 MB in the end (delta: 8.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 51.83 ms. Allocated memory was 58.7 MB in the beginning and 88.1 MB in the end (delta: 29.4 MB). Free memory was 27.9 MB in the beginning and 71.0 MB in the end (delta: -43.0 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.31 ms. Allocated memory is still 88.1 MB. Free memory was 71.0 MB in the beginning and 69.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 417.70 ms. Allocated memory is still 88.1 MB. Free memory was 69.2 MB in the beginning and 61.5 MB in the end (delta: 7.7 MB). Peak memory consumption was 22.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14809.07 ms. Allocated memory was 88.1 MB in the beginning and 130.0 MB in the end (delta: 41.9 MB). Free memory was 60.9 MB in the beginning and 65.7 MB in the end (delta: -4.8 MB). Peak memory consumption was 72.9 MB. Max. memory is 16.1 GB. * Witness Printer took 3.27 ms. Allocated memory is still 130.0 MB. Free memory is still 65.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; VAL [garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L538] x1->data = 0 VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L541] case 2: VAL [garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L542] x1->data = 4 VAL [garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L545] t1 = S VAL [garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: VAL [garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L548] x1->next = t1 VAL [garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: VAL [garbage={0:0}, pc1=6, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L551] COND TRUE S == t1 [L552] S = x1 VAL [garbage={0:0}, pc1=6, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: [L556] case 6: [L557] pc1 = 1 VAL [garbage={0:0}, pc1=1, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND FALSE !(1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) VAL [garbage={0:0}, pc1=1, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 60 locations, 20 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 14.6s, OverallIterations: 15, TraceHistogramMax: 6, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1867 SDtfs, 7056 SDslu, 6150 SDs, 0 SdLazy, 2045 SolverSat, 454 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1181 GetRequests, 988 SyntacticMatches, 5 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6518occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 14 MinimizatonAttempts, 7701 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 619 NumberOfCodeBlocks, 619 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 1033 ConstructedInterpolants, 0 QuantifiedInterpolants, 74943 SizeOfPredicates, 79 NumberOfNonLiveVariables, 2793 ConjunctsInSsa, 191 ConjunctsInUnsatCore, 53 InterpolantComputations, 7 PerfectInterpolantSequences, 412/902 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...