./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/960521-1_1-2.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_9314ebb0-0ab3-4ca3-ae5a-edc3c56e3086/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_9314ebb0-0ab3-4ca3-ae5a-edc3c56e3086/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9314ebb0-0ab3-4ca3-ae5a-edc3c56e3086/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9314ebb0-0ab3-4ca3-ae5a-edc3c56e3086/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/960521-1_1-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_9314ebb0-0ab3-4ca3-ae5a-edc3c56e3086/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9314ebb0-0ab3-4ca3-ae5a-edc3c56e3086/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 827498ab4b3c5dc78cf8c3647d07d0c3ba18f893 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 05:03:36,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 05:03:36,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 05:03:36,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 05:03:36,377 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 05:03:36,378 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 05:03:36,379 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 05:03:36,381 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 05:03:36,383 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 05:03:36,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 05:03:36,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 05:03:36,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 05:03:36,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 05:03:36,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 05:03:36,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 05:03:36,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 05:03:36,389 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 05:03:36,390 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 05:03:36,392 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 05:03:36,394 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 05:03:36,395 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 05:03:36,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 05:03:36,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 05:03:36,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 05:03:36,400 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 05:03:36,401 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 05:03:36,401 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 05:03:36,402 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 05:03:36,402 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 05:03:36,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 05:03:36,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 05:03:36,404 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 05:03:36,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 05:03:36,405 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 05:03:36,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 05:03:36,406 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 05:03:36,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 05:03:36,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 05:03:36,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 05:03:36,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 05:03:36,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 05:03:36,408 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9314ebb0-0ab3-4ca3-ae5a-edc3c56e3086/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 05:03:36,424 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 05:03:36,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 05:03:36,425 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 05:03:36,425 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 05:03:36,426 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 05:03:36,426 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 05:03:36,426 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 05:03:36,426 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 05:03:36,426 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 05:03:36,426 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 05:03:36,426 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 05:03:36,426 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 05:03:36,427 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 05:03:36,427 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 05:03:36,427 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 05:03:36,427 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 05:03:36,427 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 05:03:36,428 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 05:03:36,428 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 05:03:36,428 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 05:03:36,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 05:03:36,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 05:03:36,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 05:03:36,428 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 05:03:36,428 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 05:03:36,429 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 05:03:36,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 05:03:36,429 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 05:03:36,429 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 05:03:36,429 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 05:03:36,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 05:03:36,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 05:03:36,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 05:03:36,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 05:03:36,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 05:03:36,430 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 05:03:36,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 05:03:36,430 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 05:03:36,430 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 05:03:36,431 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_9314ebb0-0ab3-4ca3-ae5a-edc3c56e3086/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_9314ebb0-0ab3-4ca3-ae5a-edc3c56e3086/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 827498ab4b3c5dc78cf8c3647d07d0c3ba18f893 [2020-12-09 05:03:36,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 05:03:36,620 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 05:03:36,622 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 05:03:36,623 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 05:03:36,624 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 05:03:36,624 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9314ebb0-0ab3-4ca3-ae5a-edc3c56e3086/bin/utaipan/../../sv-benchmarks/c/list-ext-properties/960521-1_1-2.i [2020-12-09 05:03:36,666 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9314ebb0-0ab3-4ca3-ae5a-edc3c56e3086/bin/utaipan/data/48a8b382c/a1ce6f5f26ce4f85a8dad06d0ea978a6/FLAGf3ab15580 [2020-12-09 05:03:37,057 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 05:03:37,058 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9314ebb0-0ab3-4ca3-ae5a-edc3c56e3086/sv-benchmarks/c/list-ext-properties/960521-1_1-2.i [2020-12-09 05:03:37,069 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9314ebb0-0ab3-4ca3-ae5a-edc3c56e3086/bin/utaipan/data/48a8b382c/a1ce6f5f26ce4f85a8dad06d0ea978a6/FLAGf3ab15580 [2020-12-09 05:03:37,080 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9314ebb0-0ab3-4ca3-ae5a-edc3c56e3086/bin/utaipan/data/48a8b382c/a1ce6f5f26ce4f85a8dad06d0ea978a6 [2020-12-09 05:03:37,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 05:03:37,084 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 05:03:37,086 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 05:03:37,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 05:03:37,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 05:03:37,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:03:37" (1/1) ... [2020-12-09 05:03:37,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@288ca26d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:37, skipping insertion in model container [2020-12-09 05:03:37,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:03:37" (1/1) ... [2020-12-09 05:03:37,095 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 05:03:37,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 05:03:37,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 05:03:37,323 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 05:03:37,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 05:03:37,385 INFO L208 MainTranslator]: Completed translation [2020-12-09 05:03:37,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:37 WrapperNode [2020-12-09 05:03:37,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 05:03:37,386 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 05:03:37,386 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 05:03:37,386 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 05:03:37,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:37" (1/1) ... [2020-12-09 05:03:37,401 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:37" (1/1) ... [2020-12-09 05:03:37,415 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 05:03:37,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 05:03:37,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 05:03:37,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 05:03:37,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:37" (1/1) ... [2020-12-09 05:03:37,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:37" (1/1) ... [2020-12-09 05:03:37,424 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:37" (1/1) ... [2020-12-09 05:03:37,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:37" (1/1) ... [2020-12-09 05:03:37,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:37" (1/1) ... [2020-12-09 05:03:37,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:37" (1/1) ... [2020-12-09 05:03:37,433 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:37" (1/1) ... [2020-12-09 05:03:37,435 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 05:03:37,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 05:03:37,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 05:03:37,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 05:03:37,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9314ebb0-0ab3-4ca3-ae5a-edc3c56e3086/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 05:03:37,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 05:03:37,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 05:03:37,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 05:03:37,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 05:03:37,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 05:03:37,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 05:03:37,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 05:03:37,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 05:03:37,747 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 05:03:37,747 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-09 05:03:37,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:03:37 BoogieIcfgContainer [2020-12-09 05:03:37,748 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 05:03:37,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 05:03:37,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 05:03:37,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 05:03:37,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:03:37" (1/3) ... [2020-12-09 05:03:37,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a52ac47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:03:37, skipping insertion in model container [2020-12-09 05:03:37,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:03:37" (2/3) ... [2020-12-09 05:03:37,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a52ac47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:03:37, skipping insertion in model container [2020-12-09 05:03:37,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:03:37" (3/3) ... [2020-12-09 05:03:37,754 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1_1-2.i [2020-12-09 05:03:37,763 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 05:03:37,765 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 23 error locations. [2020-12-09 05:03:37,775 INFO L253 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2020-12-09 05:03:37,788 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 05:03:37,788 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 05:03:37,788 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 05:03:37,788 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 05:03:37,788 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 05:03:37,789 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 05:03:37,789 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 05:03:37,789 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 05:03:37,799 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-12-09 05:03:37,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 05:03:37,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:37,804 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 05:03:37,804 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 05:03:37,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:37,808 INFO L82 PathProgramCache]: Analyzing trace with hash 3767634, now seen corresponding path program 1 times [2020-12-09 05:03:37,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:37,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822533777] [2020-12-09 05:03:37,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:37,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:37,904 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 05:03:37,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822533777] [2020-12-09 05:03:37,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:03:37,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 05:03:37,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30468923] [2020-12-09 05:03:37,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 05:03:37,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:37,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 05:03:37,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 05:03:37,920 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 2 states. [2020-12-09 05:03:37,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:37,929 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-12-09 05:03:37,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 05:03:37,930 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-12-09 05:03:37,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:37,936 INFO L225 Difference]: With dead ends: 50 [2020-12-09 05:03:37,936 INFO L226 Difference]: Without dead ends: 49 [2020-12-09 05:03:37,937 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 05:03:37,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-09 05:03:37,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-12-09 05:03:37,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-09 05:03:37,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-12-09 05:03:37,961 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 4 [2020-12-09 05:03:37,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:37,961 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-12-09 05:03:37,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 05:03:37,961 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-12-09 05:03:37,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 05:03:37,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:37,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 05:03:37,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 05:03:37,962 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 05:03:37,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:37,963 INFO L82 PathProgramCache]: Analyzing trace with hash 116582307, now seen corresponding path program 1 times [2020-12-09 05:03:37,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:37,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963807496] [2020-12-09 05:03:37,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:37,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:38,008 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 05:03:38,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963807496] [2020-12-09 05:03:38,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:03:38,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 05:03:38,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091548461] [2020-12-09 05:03:38,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:03:38,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:38,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:03:38,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:03:38,010 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 3 states. [2020-12-09 05:03:38,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:38,046 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-12-09 05:03:38,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:03:38,046 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 05:03:38,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:38,047 INFO L225 Difference]: With dead ends: 48 [2020-12-09 05:03:38,047 INFO L226 Difference]: Without dead ends: 48 [2020-12-09 05:03:38,048 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 05:03:38,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-09 05:03:38,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-09 05:03:38,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-09 05:03:38,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-12-09 05:03:38,054 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 5 [2020-12-09 05:03:38,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:38,054 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-12-09 05:03:38,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:03:38,054 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-12-09 05:03:38,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 05:03:38,055 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:38,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 05:03:38,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 05:03:38,055 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 05:03:38,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:38,056 INFO L82 PathProgramCache]: Analyzing trace with hash 116582308, now seen corresponding path program 1 times [2020-12-09 05:03:38,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:38,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165978321] [2020-12-09 05:03:38,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:38,114 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 05:03:38,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165978321] [2020-12-09 05:03:38,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:03:38,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 05:03:38,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657782142] [2020-12-09 05:03:38,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:03:38,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:38,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:03:38,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:03:38,116 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 4 states. [2020-12-09 05:03:38,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:38,155 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-12-09 05:03:38,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 05:03:38,156 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-09 05:03:38,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:38,156 INFO L225 Difference]: With dead ends: 47 [2020-12-09 05:03:38,156 INFO L226 Difference]: Without dead ends: 47 [2020-12-09 05:03:38,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 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 05:03:38,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-09 05:03:38,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-09 05:03:38,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-09 05:03:38,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-12-09 05:03:38,161 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 5 [2020-12-09 05:03:38,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:38,161 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-12-09 05:03:38,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:03:38,161 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-12-09 05:03:38,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 05:03:38,161 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:38,161 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:03:38,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 05:03:38,162 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 05:03:38,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:38,162 INFO L82 PathProgramCache]: Analyzing trace with hash 366524148, now seen corresponding path program 1 times [2020-12-09 05:03:38,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:38,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102065330] [2020-12-09 05:03:38,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:38,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:38,204 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 05:03:38,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102065330] [2020-12-09 05:03:38,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:03:38,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 05:03:38,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344457151] [2020-12-09 05:03:38,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:03:38,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:38,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:03:38,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:03:38,206 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 4 states. [2020-12-09 05:03:38,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:38,234 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-12-09 05:03:38,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:03:38,235 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 05:03:38,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:38,235 INFO L225 Difference]: With dead ends: 44 [2020-12-09 05:03:38,235 INFO L226 Difference]: Without dead ends: 44 [2020-12-09 05:03:38,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:03:38,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-09 05:03:38,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-09 05:03:38,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-09 05:03:38,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-12-09 05:03:38,239 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 7 [2020-12-09 05:03:38,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:38,239 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-12-09 05:03:38,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:03:38,239 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-12-09 05:03:38,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 05:03:38,240 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:38,240 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:03:38,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 05:03:38,240 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 05:03:38,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:38,241 INFO L82 PathProgramCache]: Analyzing trace with hash 366524149, now seen corresponding path program 1 times [2020-12-09 05:03:38,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:38,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333433714] [2020-12-09 05:03:38,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:38,320 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 05:03:38,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333433714] [2020-12-09 05:03:38,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:03:38,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 05:03:38,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45866527] [2020-12-09 05:03:38,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 05:03:38,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:38,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 05:03:38,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 05:03:38,322 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 6 states. [2020-12-09 05:03:38,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:38,405 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-12-09 05:03:38,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 05:03:38,406 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-12-09 05:03:38,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:38,407 INFO L225 Difference]: With dead ends: 78 [2020-12-09 05:03:38,407 INFO L226 Difference]: Without dead ends: 78 [2020-12-09 05:03:38,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 05:03:38,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-09 05:03:38,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 44. [2020-12-09 05:03:38,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-09 05:03:38,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-12-09 05:03:38,414 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 7 [2020-12-09 05:03:38,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:38,414 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-12-09 05:03:38,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 05:03:38,414 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-12-09 05:03:38,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 05:03:38,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:38,415 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:03:38,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 05:03:38,415 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 05:03:38,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:38,416 INFO L82 PathProgramCache]: Analyzing trace with hash 42454203, now seen corresponding path program 1 times [2020-12-09 05:03:38,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:38,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659031031] [2020-12-09 05:03:38,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:38,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:38,461 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 05:03:38,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659031031] [2020-12-09 05:03:38,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153297695] [2020-12-09 05:03:38,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9314ebb0-0ab3-4ca3-ae5a-edc3c56e3086/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 05:03:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:38,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 05:03:38,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:03:38,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:03:38,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:03:38,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:03:38,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 05:03:38,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2020-12-09 05:03:38,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508777939] [2020-12-09 05:03:38,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 05:03:38,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:38,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 05:03:38,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-09 05:03:38,579 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 7 states. [2020-12-09 05:03:38,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:38,623 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2020-12-09 05:03:38,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 05:03:38,623 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-12-09 05:03:38,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:38,624 INFO L225 Difference]: With dead ends: 82 [2020-12-09 05:03:38,624 INFO L226 Difference]: Without dead ends: 82 [2020-12-09 05:03:38,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-09 05:03:38,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-09 05:03:38,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-12-09 05:03:38,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-09 05:03:38,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-12-09 05:03:38,628 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 9 [2020-12-09 05:03:38,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:38,628 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-12-09 05:03:38,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 05:03:38,628 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-12-09 05:03:38,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 05:03:38,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:38,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:03:38,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-09 05:03:38,830 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 05:03:38,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:38,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1316153601, now seen corresponding path program 1 times [2020-12-09 05:03:38,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:38,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824684163] [2020-12-09 05:03:38,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:38,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:38,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 05:03:38,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824684163] [2020-12-09 05:03:38,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:03:38,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 05:03:38,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168132483] [2020-12-09 05:03:38,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:03:38,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:38,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:03:38,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:03:38,965 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 4 states. [2020-12-09 05:03:39,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:39,151 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-12-09 05:03:39,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 05:03:39,152 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-09 05:03:39,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:39,152 INFO L225 Difference]: With dead ends: 49 [2020-12-09 05:03:39,152 INFO L226 Difference]: Without dead ends: 49 [2020-12-09 05:03:39,153 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 05:03:39,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-09 05:03:39,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-12-09 05:03:39,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-09 05:03:39,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-12-09 05:03:39,156 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 10 [2020-12-09 05:03:39,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:39,156 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-12-09 05:03:39,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:03:39,157 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-12-09 05:03:39,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 05:03:39,157 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:39,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:03:39,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 05:03:39,157 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 05:03:39,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:39,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1316153602, now seen corresponding path program 1 times [2020-12-09 05:03:39,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:39,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131239220] [2020-12-09 05:03:39,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:39,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 05:03:39,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131239220] [2020-12-09 05:03:39,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:03:39,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 05:03:39,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705368834] [2020-12-09 05:03:39,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 05:03:39,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:39,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 05:03:39,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-09 05:03:39,208 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 6 states. [2020-12-09 05:03:39,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:39,250 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-12-09 05:03:39,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 05:03:39,251 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-09 05:03:39,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:39,251 INFO L225 Difference]: With dead ends: 44 [2020-12-09 05:03:39,251 INFO L226 Difference]: Without dead ends: 44 [2020-12-09 05:03:39,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-09 05:03:39,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-09 05:03:39,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-09 05:03:39,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-09 05:03:39,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-12-09 05:03:39,254 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 10 [2020-12-09 05:03:39,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:39,254 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-12-09 05:03:39,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 05:03:39,254 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-12-09 05:03:39,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 05:03:39,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:39,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:03:39,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 05:03:39,255 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 05:03:39,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:39,255 INFO L82 PathProgramCache]: Analyzing trace with hash 2146055995, now seen corresponding path program 1 times [2020-12-09 05:03:39,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:39,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826021207] [2020-12-09 05:03:39,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:39,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:39,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 05:03:39,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826021207] [2020-12-09 05:03:39,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:03:39,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 05:03:39,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116976446] [2020-12-09 05:03:39,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:03:39,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:39,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:03:39,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:03:39,295 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 4 states. [2020-12-09 05:03:39,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:39,372 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-12-09 05:03:39,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 05:03:39,373 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-09 05:03:39,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:39,374 INFO L225 Difference]: With dead ends: 66 [2020-12-09 05:03:39,374 INFO L226 Difference]: Without dead ends: 66 [2020-12-09 05:03:39,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 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 05:03:39,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-09 05:03:39,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-12-09 05:03:39,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-09 05:03:39,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-12-09 05:03:39,378 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 11 [2020-12-09 05:03:39,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:39,378 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-12-09 05:03:39,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:03:39,378 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-12-09 05:03:39,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 05:03:39,379 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:39,379 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:03:39,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 05:03:39,379 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 05:03:39,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:39,380 INFO L82 PathProgramCache]: Analyzing trace with hash -224366304, now seen corresponding path program 1 times [2020-12-09 05:03:39,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:39,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982301660] [2020-12-09 05:03:39,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:39,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:39,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:03:39,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982301660] [2020-12-09 05:03:39,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710881908] [2020-12-09 05:03:39,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9314ebb0-0ab3-4ca3-ae5a-edc3c56e3086/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 05:03:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:39,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-09 05:03:39,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:03:39,540 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-09 05:03:39,540 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 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-09 05:03:39,541 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 05:03:39,548 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 05:03:39,555 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 05:03:39,555 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:34 [2020-12-09 05:03:39,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:03:39,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:03:39,666 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 05:03:39,667 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 05:03:39,668 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 05:03:39,668 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:5 [2020-12-09 05:03:39,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:03:39,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [825144285] [2020-12-09 05:03:39,690 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 05:03:39,690 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 05:03:39,694 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 05:03:39,697 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 05:03:39,698 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 05:03:40,149 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 05:03:40,729 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:03:40,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 05:03:40,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2020-12-09 05:03:40,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372295558] [2020-12-09 05:03:40,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-09 05:03:40,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:40,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-09 05:03:40,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2020-12-09 05:03:40,730 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 14 states. [2020-12-09 05:03:40,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:40,942 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2020-12-09 05:03:40,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 05:03:40,943 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-09 05:03:40,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:40,943 INFO L225 Difference]: With dead ends: 97 [2020-12-09 05:03:40,943 INFO L226 Difference]: Without dead ends: 97 [2020-12-09 05:03:40,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2020-12-09 05:03:40,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-09 05:03:40,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 49. [2020-12-09 05:03:40,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-09 05:03:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-12-09 05:03:40,947 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 11 [2020-12-09 05:03:40,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:40,947 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-12-09 05:03:40,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-09 05:03:40,947 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-12-09 05:03:40,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 05:03:40,948 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:40,948 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 05:03:41,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-09 05:03:41,149 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 05:03:41,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:41,150 INFO L82 PathProgramCache]: Analyzing trace with hash -867588058, now seen corresponding path program 2 times [2020-12-09 05:03:41,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:41,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463387732] [2020-12-09 05:03:41,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:03:41,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463387732] [2020-12-09 05:03:41,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551709792] [2020-12-09 05:03:41,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9314ebb0-0ab3-4ca3-ae5a-edc3c56e3086/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 05:03:41,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 05:03:41,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 05:03:41,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 05:03:41,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:03:41,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 05:03:41,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:03:41,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 05:03:41,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [845679500] [2020-12-09 05:03:41,430 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 05:03:41,430 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 05:03:41,430 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 05:03:41,430 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 05:03:41,430 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 05:03:41,720 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 05:03:42,151 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:03:42,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 05:03:42,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 13 [2020-12-09 05:03:42,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230914910] [2020-12-09 05:03:42,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-09 05:03:42,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:42,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-09 05:03:42,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-12-09 05:03:42,153 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 13 states. [2020-12-09 05:03:42,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:42,493 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-12-09 05:03:42,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-09 05:03:42,493 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2020-12-09 05:03:42,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:42,494 INFO L225 Difference]: With dead ends: 104 [2020-12-09 05:03:42,494 INFO L226 Difference]: Without dead ends: 104 [2020-12-09 05:03:42,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2020-12-09 05:03:42,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-09 05:03:42,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 59. [2020-12-09 05:03:42,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-09 05:03:42,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-12-09 05:03:42,499 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 13 [2020-12-09 05:03:42,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:42,500 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-12-09 05:03:42,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-09 05:03:42,500 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-12-09 05:03:42,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 05:03:42,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:42,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:03:42,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-09 05:03:42,703 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 05:03:42,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:42,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1729005260, now seen corresponding path program 1 times [2020-12-09 05:03:42,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:42,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197429420] [2020-12-09 05:03:42,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:42,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 05:03:42,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197429420] [2020-12-09 05:03:42,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:03:42,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 05:03:42,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225455840] [2020-12-09 05:03:42,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:03:42,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:42,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:03:42,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:03:42,759 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 3 states. [2020-12-09 05:03:42,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:42,771 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-12-09 05:03:42,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:03:42,772 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-12-09 05:03:42,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:42,772 INFO L225 Difference]: With dead ends: 57 [2020-12-09 05:03:42,772 INFO L226 Difference]: Without dead ends: 57 [2020-12-09 05:03:42,772 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 05:03:42,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-09 05:03:42,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-09 05:03:42,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-09 05:03:42,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2020-12-09 05:03:42,775 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 14 [2020-12-09 05:03:42,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:42,775 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2020-12-09 05:03:42,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:03:42,775 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2020-12-09 05:03:42,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 05:03:42,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:42,776 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:03:42,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-12-09 05:03:42,776 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 05:03:42,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:42,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1125354426, now seen corresponding path program 1 times [2020-12-09 05:03:42,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:42,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643476406] [2020-12-09 05:03:42,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:42,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 05:03:42,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643476406] [2020-12-09 05:03:42,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:03:42,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 05:03:42,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735350217] [2020-12-09 05:03:42,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 05:03:42,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:42,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 05:03:42,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-09 05:03:42,838 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 8 states. [2020-12-09 05:03:42,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:42,935 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2020-12-09 05:03:42,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 05:03:42,936 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-09 05:03:42,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:42,936 INFO L225 Difference]: With dead ends: 76 [2020-12-09 05:03:42,936 INFO L226 Difference]: Without dead ends: 76 [2020-12-09 05:03:42,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-09 05:03:42,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-09 05:03:42,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 58. [2020-12-09 05:03:42,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-09 05:03:42,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-12-09 05:03:42,939 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 14 [2020-12-09 05:03:42,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:42,939 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-12-09 05:03:42,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 05:03:42,940 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-12-09 05:03:42,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 05:03:42,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:42,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:03:42,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-12-09 05:03:42,941 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 05:03:42,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:42,941 INFO L82 PathProgramCache]: Analyzing trace with hash 578292278, now seen corresponding path program 1 times [2020-12-09 05:03:42,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:42,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474816499] [2020-12-09 05:03:42,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:42,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:42,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 05:03:42,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474816499] [2020-12-09 05:03:42,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:03:42,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 05:03:42,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608872945] [2020-12-09 05:03:42,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 05:03:42,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:42,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 05:03:42,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 05:03:42,982 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 5 states. [2020-12-09 05:03:43,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:43,003 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2020-12-09 05:03:43,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 05:03:43,004 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-09 05:03:43,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:43,004 INFO L225 Difference]: With dead ends: 57 [2020-12-09 05:03:43,004 INFO L226 Difference]: Without dead ends: 57 [2020-12-09 05:03:43,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-09 05:03:43,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-09 05:03:43,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-09 05:03:43,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-09 05:03:43,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-12-09 05:03:43,007 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 16 [2020-12-09 05:03:43,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:43,007 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-12-09 05:03:43,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 05:03:43,007 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-12-09 05:03:43,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 05:03:43,008 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:43,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:03:43,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-12-09 05:03:43,008 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 05:03:43,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:43,009 INFO L82 PathProgramCache]: Analyzing trace with hash 564932008, now seen corresponding path program 1 times [2020-12-09 05:03:43,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:43,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504313131] [2020-12-09 05:03:43,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:43,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 05:03:43,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504313131] [2020-12-09 05:03:43,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:03:43,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 05:03:43,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855276215] [2020-12-09 05:03:43,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 05:03:43,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:43,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 05:03:43,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-09 05:03:43,125 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 7 states. [2020-12-09 05:03:43,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:43,218 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2020-12-09 05:03:43,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 05:03:43,218 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-09 05:03:43,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:43,219 INFO L225 Difference]: With dead ends: 69 [2020-12-09 05:03:43,219 INFO L226 Difference]: Without dead ends: 69 [2020-12-09 05:03:43,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-09 05:03:43,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-09 05:03:43,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2020-12-09 05:03:43,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-09 05:03:43,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-12-09 05:03:43,221 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 16 [2020-12-09 05:03:43,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:43,221 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-12-09 05:03:43,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 05:03:43,221 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-12-09 05:03:43,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 05:03:43,221 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:43,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:03:43,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-12-09 05:03:43,222 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 05:03:43,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:43,222 INFO L82 PathProgramCache]: Analyzing trace with hash 747191550, now seen corresponding path program 1 times [2020-12-09 05:03:43,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:43,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079041599] [2020-12-09 05:03:43,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:43,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 05:03:43,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079041599] [2020-12-09 05:03:43,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:03:43,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 05:03:43,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856572470] [2020-12-09 05:03:43,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:03:43,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:43,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:03:43,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:03:43,238 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 3 states. [2020-12-09 05:03:43,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:43,250 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2020-12-09 05:03:43,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:03:43,250 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-09 05:03:43,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:43,251 INFO L225 Difference]: With dead ends: 57 [2020-12-09 05:03:43,251 INFO L226 Difference]: Without dead ends: 57 [2020-12-09 05:03:43,251 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 05:03:43,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-09 05:03:43,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-09 05:03:43,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-09 05:03:43,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-12-09 05:03:43,252 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 17 [2020-12-09 05:03:43,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:43,253 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-12-09 05:03:43,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:03:43,253 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-12-09 05:03:43,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 05:03:43,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:43,253 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:03:43,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-12-09 05:03:43,253 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 05:03:43,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:43,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1082535411, now seen corresponding path program 1 times [2020-12-09 05:03:43,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:43,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544037327] [2020-12-09 05:03:43,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:43,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-09 05:03:43,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544037327] [2020-12-09 05:03:43,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:03:43,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 05:03:43,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590717157] [2020-12-09 05:03:43,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 05:03:43,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:43,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 05:03:43,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-09 05:03:43,304 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 7 states. [2020-12-09 05:03:43,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:43,365 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2020-12-09 05:03:43,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 05:03:43,365 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-12-09 05:03:43,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:43,366 INFO L225 Difference]: With dead ends: 66 [2020-12-09 05:03:43,366 INFO L226 Difference]: Without dead ends: 66 [2020-12-09 05:03:43,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-12-09 05:03:43,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-09 05:03:43,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2020-12-09 05:03:43,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-09 05:03:43,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-12-09 05:03:43,367 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 17 [2020-12-09 05:03:43,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:43,367 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-12-09 05:03:43,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 05:03:43,367 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-12-09 05:03:43,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 05:03:43,368 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:43,368 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:03:43,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-12-09 05:03:43,368 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 05:03:43,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:43,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1688101688, now seen corresponding path program 1 times [2020-12-09 05:03:43,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:43,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153102780] [2020-12-09 05:03:43,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:43,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 05:03:43,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153102780] [2020-12-09 05:03:43,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:03:43,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 05:03:43,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805663949] [2020-12-09 05:03:43,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:03:43,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:43,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:03:43,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:03:43,389 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 4 states. [2020-12-09 05:03:43,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:43,407 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2020-12-09 05:03:43,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:03:43,408 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-12-09 05:03:43,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:43,408 INFO L225 Difference]: With dead ends: 55 [2020-12-09 05:03:43,408 INFO L226 Difference]: Without dead ends: 55 [2020-12-09 05:03:43,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:03:43,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-09 05:03:43,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-12-09 05:03:43,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-09 05:03:43,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-12-09 05:03:43,409 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 18 [2020-12-09 05:03:43,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:43,410 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-12-09 05:03:43,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:03:43,410 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-12-09 05:03:43,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 05:03:43,410 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:43,410 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:03:43,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-12-09 05:03:43,410 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 05:03:43,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:43,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1256274796, now seen corresponding path program 1 times [2020-12-09 05:03:43,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:43,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551953952] [2020-12-09 05:03:43,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:43,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:43,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 05:03:43,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551953952] [2020-12-09 05:03:43,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816314731] [2020-12-09 05:03:43,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9314ebb0-0ab3-4ca3-ae5a-edc3c56e3086/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 05:03:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:43,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 05:03:43,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:03:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 05:03:43,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:03:43,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 05:03:43,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [322971692] [2020-12-09 05:03:43,555 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 05:03:43,555 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 05:03:43,555 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 05:03:43,556 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 05:03:43,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 05:03:44,001 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 05:03:44,527 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:03:44,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 05:03:44,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2020-12-09 05:03:44,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027557146] [2020-12-09 05:03:44,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 05:03:44,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:44,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 05:03:44,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-12-09 05:03:44,528 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 12 states. [2020-12-09 05:03:44,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:44,667 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2020-12-09 05:03:44,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-09 05:03:44,667 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-12-09 05:03:44,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:44,667 INFO L225 Difference]: With dead ends: 107 [2020-12-09 05:03:44,668 INFO L226 Difference]: Without dead ends: 107 [2020-12-09 05:03:44,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2020-12-09 05:03:44,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-09 05:03:44,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 58. [2020-12-09 05:03:44,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-09 05:03:44,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-12-09 05:03:44,669 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 18 [2020-12-09 05:03:44,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:44,670 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-12-09 05:03:44,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 05:03:44,670 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-12-09 05:03:44,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-09 05:03:44,670 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:44,670 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:03:44,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:03:44,872 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 05:03:44,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:44,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1231911877, now seen corresponding path program 1 times [2020-12-09 05:03:44,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:44,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582213103] [2020-12-09 05:03:44,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 05:03:44,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582213103] [2020-12-09 05:03:44,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:03:44,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 05:03:44,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125883347] [2020-12-09 05:03:44,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 05:03:44,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:44,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 05:03:44,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 05:03:44,955 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 5 states. [2020-12-09 05:03:44,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:44,995 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2020-12-09 05:03:44,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 05:03:44,996 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-12-09 05:03:44,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:44,996 INFO L225 Difference]: With dead ends: 57 [2020-12-09 05:03:44,996 INFO L226 Difference]: Without dead ends: 40 [2020-12-09 05:03:44,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-09 05:03:44,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-09 05:03:44,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-09 05:03:44,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-09 05:03:44,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-12-09 05:03:44,997 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 20 [2020-12-09 05:03:44,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:44,997 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-12-09 05:03:44,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 05:03:44,997 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-12-09 05:03:44,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-09 05:03:44,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:44,998 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:03:44,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2020-12-09 05:03:44,998 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 05:03:44,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:44,998 INFO L82 PathProgramCache]: Analyzing trace with hash -122098034, now seen corresponding path program 2 times [2020-12-09 05:03:44,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:44,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682048556] [2020-12-09 05:03:44,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-09 05:03:45,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682048556] [2020-12-09 05:03:45,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163669467] [2020-12-09 05:03:45,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9314ebb0-0ab3-4ca3-ae5a-edc3c56e3086/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 05:03:45,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 05:03:45,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 05:03:45,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 05:03:45,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:03:45,224 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-09 05:03:45,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:03:45,353 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-09 05:03:45,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1472983659] [2020-12-09 05:03:45,354 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 05:03:45,354 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 05:03:45,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 05:03:45,355 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 05:03:45,355 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 05:03:45,690 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 05:03:46,283 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:03:46,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 05:03:46,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 19 [2020-12-09 05:03:46,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848573177] [2020-12-09 05:03:46,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-09 05:03:46,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:46,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-09 05:03:46,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2020-12-09 05:03:46,284 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 20 states. [2020-12-09 05:03:46,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:46,583 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-12-09 05:03:46,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 05:03:46,584 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2020-12-09 05:03:46,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:46,584 INFO L225 Difference]: With dead ends: 47 [2020-12-09 05:03:46,584 INFO L226 Difference]: Without dead ends: 47 [2020-12-09 05:03:46,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2020-12-09 05:03:46,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-09 05:03:46,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2020-12-09 05:03:46,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-09 05:03:46,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-12-09 05:03:46,586 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 20 [2020-12-09 05:03:46,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:46,586 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-12-09 05:03:46,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-09 05:03:46,586 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-12-09 05:03:46,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 05:03:46,586 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:46,587 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:03:46,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-12-09 05:03:46,788 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 05:03:46,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:46,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1944737296, now seen corresponding path program 1 times [2020-12-09 05:03:46,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:46,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3890399] [2020-12-09 05:03:46,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:47,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:03:47,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3890399] [2020-12-09 05:03:47,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602294342] [2020-12-09 05:03:47,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9314ebb0-0ab3-4ca3-ae5a-edc3c56e3086/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 05:03:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:47,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-09 05:03:47,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:03:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:03:47,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:03:50,559 WARN L197 SmtUtils]: Spent 741.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-09 05:03:56,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:03:56,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1550821985] [2020-12-09 05:03:56,092 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2020-12-09 05:03:56,092 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 05:03:56,092 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 05:03:56,092 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 05:03:56,092 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 05:03:56,471 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 05:03:56,657 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2020-12-09 05:03:57,962 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:03:57,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 05:03:57,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2020-12-09 05:03:57,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405907101] [2020-12-09 05:03:57,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-09 05:03:57,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:03:57,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-09 05:03:57,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1502, Unknown=19, NotChecked=0, Total=1722 [2020-12-09 05:03:57,963 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 30 states. [2020-12-09 05:03:58,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:03:58,796 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-12-09 05:03:58,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-09 05:03:58,797 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 22 [2020-12-09 05:03:58,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:03:58,797 INFO L225 Difference]: With dead ends: 42 [2020-12-09 05:03:58,797 INFO L226 Difference]: Without dead ends: 29 [2020-12-09 05:03:58,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=375, Invalid=2361, Unknown=20, NotChecked=0, Total=2756 [2020-12-09 05:03:58,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-09 05:03:58,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-09 05:03:58,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 05:03:58,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-12-09 05:03:58,799 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-12-09 05:03:58,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:03:58,799 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-12-09 05:03:58,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-09 05:03:58,799 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-12-09 05:03:58,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-09 05:03:58,800 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:03:58,800 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:03:59,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-12-09 05:03:59,002 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 05:03:59,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:03:59,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1945674696, now seen corresponding path program 2 times [2020-12-09 05:03:59,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:03:59,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408603044] [2020-12-09 05:03:59,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:03:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:03:59,420 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 05:03:59,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408603044] [2020-12-09 05:03:59,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333876369] [2020-12-09 05:03:59,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9314ebb0-0ab3-4ca3-ae5a-edc3c56e3086/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 05:03:59,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-09 05:03:59,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 05:03:59,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-09 05:03:59,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:04:00,168 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 05:04:00,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:04:02,446 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((|#memory_int| (Array Int (Array Int Int))) (v_ULTIMATE.start_foo_~i~0_100 Int)) (or (< (+ v_ULTIMATE.start_foo_~i~0_100 2) c_~n~0) (let ((.cse0 (store (store (select (store |#memory_int| |c_ULTIMATE.start_main_#t~post11.base| (store (select |#memory_int| |c_ULTIMATE.start_main_#t~post11.base|) |c_ULTIMATE.start_main_#t~post11.offset| c_~n~0)) c_~b~0.base) c_~b~0.offset c_~n~0) (+ (* v_ULTIMATE.start_foo_~i~0_100 4) c_~b~0.offset) c_~n~0))) (= (select .cse0 (+ c_~b~0.offset (- 4))) (select .cse0 (+ (* c_~n~0 4) c_~b~0.offset (- 8))))) (< 1 v_ULTIMATE.start_foo_~i~0_100))) (<= c_~n~0 1)) is different from false [2020-12-09 05:04:02,459 WARN L234 Elim1Store]: Array PQE input equivalent to true [2020-12-09 05:04:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-09 05:04:02,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1867187950] [2020-12-09 05:04:02,468 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2020-12-09 05:04:02,468 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 05:04:02,468 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 05:04:02,469 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 05:04:02,469 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 05:04:02,865 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 05:04:03,053 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2020-12-09 05:04:04,405 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:04:04,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 05:04:04,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 11] total 35 [2020-12-09 05:04:04,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099957358] [2020-12-09 05:04:04,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-09 05:04:04,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:04:04,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-09 05:04:04,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1838, Unknown=3, NotChecked=88, Total=2162 [2020-12-09 05:04:04,406 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 35 states. [2020-12-09 05:04:10,613 WARN L197 SmtUtils]: Spent 6.16 s on a formula simplification. DAG size of input: 83 DAG size of output: 46 [2020-12-09 05:04:15,140 WARN L197 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 73 DAG size of output: 32 [2020-12-09 05:04:18,617 WARN L197 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 59 DAG size of output: 28 [2020-12-09 05:04:20,773 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 59 [2020-12-09 05:04:25,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:04:25,848 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-12-09 05:04:25,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-09 05:04:25,848 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 28 [2020-12-09 05:04:25,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:04:25,848 INFO L225 Difference]: With dead ends: 45 [2020-12-09 05:04:25,848 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 05:04:25,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 44 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=717, Invalid=4249, Unknown=8, NotChecked=138, Total=5112 [2020-12-09 05:04:25,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 05:04:25,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 05:04:25,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 05:04:25,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 05:04:25,850 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2020-12-09 05:04:25,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:04:25,850 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 05:04:25,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-09 05:04:25,850 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 05:04:25,850 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 05:04:26,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-12-09 05:04:26,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:04:26 BoogieIcfgContainer [2020-12-09 05:04:26,059 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 05:04:26,059 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 05:04:26,059 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 05:04:26,059 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 05:04:26,059 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:03:37" (3/4) ... [2020-12-09 05:04:26,062 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 05:04:26,069 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-12-09 05:04:26,069 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-12-09 05:04:26,070 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 05:04:26,070 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 05:04:26,097 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_9314ebb0-0ab3-4ca3-ae5a-edc3c56e3086/bin/utaipan/witness.graphml [2020-12-09 05:04:26,097 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 05:04:26,098 INFO L168 Benchmark]: Toolchain (without parser) took 49013.43 ms. Allocated memory was 107.0 MB in the beginning and 226.5 MB in the end (delta: 119.5 MB). Free memory was 68.8 MB in the beginning and 92.3 MB in the end (delta: -23.4 MB). Peak memory consumption was 95.9 MB. Max. memory is 16.1 GB. [2020-12-09 05:04:26,098 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 107.0 MB. Free memory was 86.2 MB in the beginning and 86.1 MB in the end (delta: 77.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 05:04:26,098 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.60 ms. Allocated memory is still 107.0 MB. Free memory was 68.6 MB in the beginning and 71.7 MB in the end (delta: -3.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 05:04:26,099 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.81 ms. Allocated memory is still 107.0 MB. Free memory was 71.7 MB in the beginning and 69.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 05:04:26,099 INFO L168 Benchmark]: Boogie Preprocessor took 20.15 ms. Allocated memory is still 107.0 MB. Free memory was 69.8 MB in the beginning and 68.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 05:04:26,099 INFO L168 Benchmark]: RCFGBuilder took 312.54 ms. Allocated memory is still 107.0 MB. Free memory was 68.2 MB in the beginning and 42.3 MB in the end (delta: 25.9 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2020-12-09 05:04:26,099 INFO L168 Benchmark]: TraceAbstraction took 48309.20 ms. Allocated memory was 107.0 MB in the beginning and 226.5 MB in the end (delta: 119.5 MB). Free memory was 41.9 MB in the beginning and 95.1 MB in the end (delta: -53.3 MB). Peak memory consumption was 68.5 MB. Max. memory is 16.1 GB. [2020-12-09 05:04:26,100 INFO L168 Benchmark]: Witness Printer took 38.28 ms. Allocated memory is still 226.5 MB. Free memory was 95.1 MB in the beginning and 92.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 05:04:26,101 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 107.0 MB. Free memory was 86.2 MB in the beginning and 86.1 MB in the end (delta: 77.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 299.60 ms. Allocated memory is still 107.0 MB. Free memory was 68.6 MB in the beginning and 71.7 MB in the end (delta: -3.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 28.81 ms. Allocated memory is still 107.0 MB. Free memory was 71.7 MB in the beginning and 69.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.15 ms. Allocated memory is still 107.0 MB. Free memory was 69.8 MB in the beginning and 68.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 312.54 ms. Allocated memory is still 107.0 MB. Free memory was 68.2 MB in the beginning and 42.3 MB in the end (delta: 25.9 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 48309.20 ms. Allocated memory was 107.0 MB in the beginning and 226.5 MB in the end (delta: 119.5 MB). Free memory was 41.9 MB in the beginning and 95.1 MB in the end (delta: -53.3 MB). Peak memory consumption was 68.5 MB. Max. memory is 16.1 GB. * Witness Printer took 38.28 ms. Allocated memory is still 226.5 MB. Free memory was 95.1 MB in the beginning and 92.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 542]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 542]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 530]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 530]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 544]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 545]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 547]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 544]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 545]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 545]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 544]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 545]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 547]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 544]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 545]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 545]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 534]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 23 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 50 locations, 23 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 48.2s, OverallIterations: 23, TraceHistogramMax: 3, AutomataDifference: 24.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 585 SDtfs, 1746 SDslu, 1017 SDs, 0 SdLazy, 2092 SolverSat, 331 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 4.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 530 GetRequests, 222 SyntacticMatches, 20 SemanticMatches, 288 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3050 ImplicationChecksByTransitivity, 37.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 23 MinimizatonAttempts, 273 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 14.2s InterpolantComputationTime, 433 NumberOfCodeBlocks, 425 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 517 ConstructedInterpolants, 35 QuantifiedInterpolants, 132306 SizeOfPredicates, 55 NumberOfNonLiveVariables, 742 ConjunctsInSsa, 114 ConjunctsInUnsatCore, 37 InterpolantComputations, 18 PerfectInterpolantSequences, 151/229 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 proved your program to be correct! Received shutdown request...