./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/simple-ext_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_e18e2693-aee5-43f5-9956-d6880a019134/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_e18e2693-aee5-43f5-9956-d6880a019134/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e18e2693-aee5-43f5-9956-d6880a019134/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e18e2693-aee5-43f5-9956-d6880a019134/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/simple-ext_1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_e18e2693-aee5-43f5-9956-d6880a019134/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e18e2693-aee5-43f5-9956-d6880a019134/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 c6687a6a4f9048dc5e5d535d69196d6abb05ca86 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 22:07:23,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 22:07:23,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 22:07:23,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 22:07:23,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 22:07:23,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 22:07:23,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 22:07:23,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 22:07:23,111 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 22:07:23,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 22:07:23,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 22:07:23,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 22:07:23,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 22:07:23,114 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 22:07:23,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 22:07:23,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 22:07:23,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 22:07:23,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 22:07:23,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 22:07:23,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 22:07:23,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 22:07:23,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 22:07:23,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 22:07:23,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 22:07:23,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 22:07:23,125 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 22:07:23,125 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 22:07:23,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 22:07:23,126 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 22:07:23,126 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 22:07:23,126 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 22:07:23,127 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 22:07:23,127 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 22:07:23,128 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 22:07:23,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 22:07:23,128 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 22:07:23,129 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 22:07:23,129 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 22:07:23,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 22:07:23,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 22:07:23,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 22:07:23,130 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e18e2693-aee5-43f5-9956-d6880a019134/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2019-12-07 22:07:23,140 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 22:07:23,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 22:07:23,141 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 22:07:23,141 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 22:07:23,141 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 22:07:23,141 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 22:07:23,142 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 22:07:23,142 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 22:07:23,142 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 22:07:23,142 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 22:07:23,142 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 22:07:23,142 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 22:07:23,142 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 22:07:23,142 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 22:07:23,142 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 22:07:23,143 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 22:07:23,143 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 22:07:23,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 22:07:23,143 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 22:07:23,143 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 22:07:23,143 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 22:07:23,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 22:07:23,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 22:07:23,144 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-12-07 22:07:23,144 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-12-07 22:07:23,144 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-12-07 22:07:23,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 22:07:23,144 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 22:07:23,144 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 22:07:23,145 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 22:07:23,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 22:07:23,145 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 22:07:23,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 22:07:23,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 22:07:23,145 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 22:07:23,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 22:07:23,146 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 22:07:23,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 22:07:23,146 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 22:07:23,146 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 22:07:23,146 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_e18e2693-aee5-43f5-9956-d6880a019134/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 -> c6687a6a4f9048dc5e5d535d69196d6abb05ca86 [2019-12-07 22:07:23,246 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 22:07:23,256 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 22:07:23,258 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 22:07:23,259 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 22:07:23,259 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 22:07:23,260 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e18e2693-aee5-43f5-9956-d6880a019134/bin/utaipan/../../sv-benchmarks/c/list-ext-properties/simple-ext_1.i [2019-12-07 22:07:23,301 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e18e2693-aee5-43f5-9956-d6880a019134/bin/utaipan/data/3953b443a/3ac247644a4d4b318416b4400332c0cd/FLAG745b98325 [2019-12-07 22:07:23,685 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 22:07:23,686 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e18e2693-aee5-43f5-9956-d6880a019134/sv-benchmarks/c/list-ext-properties/simple-ext_1.i [2019-12-07 22:07:23,695 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e18e2693-aee5-43f5-9956-d6880a019134/bin/utaipan/data/3953b443a/3ac247644a4d4b318416b4400332c0cd/FLAG745b98325 [2019-12-07 22:07:24,079 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e18e2693-aee5-43f5-9956-d6880a019134/bin/utaipan/data/3953b443a/3ac247644a4d4b318416b4400332c0cd [2019-12-07 22:07:24,084 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 22:07:24,085 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 22:07:24,086 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 22:07:24,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 22:07:24,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 22:07:24,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 10:07:24" (1/1) ... [2019-12-07 22:07:24,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3feec8fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:24, skipping insertion in model container [2019-12-07 22:07:24,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 10:07:24" (1/1) ... [2019-12-07 22:07:24,095 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 22:07:24,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 22:07:24,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 22:07:24,330 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 22:07:24,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 22:07:24,389 INFO L208 MainTranslator]: Completed translation [2019-12-07 22:07:24,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:24 WrapperNode [2019-12-07 22:07:24,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 22:07:24,390 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 22:07:24,390 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 22:07:24,390 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 22:07:24,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:24" (1/1) ... [2019-12-07 22:07:24,405 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:24" (1/1) ... [2019-12-07 22:07:24,419 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 22:07:24,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 22:07:24,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 22:07:24,419 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 22:07:24,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:24" (1/1) ... [2019-12-07 22:07:24,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:24" (1/1) ... [2019-12-07 22:07:24,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:24" (1/1) ... [2019-12-07 22:07:24,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:24" (1/1) ... [2019-12-07 22:07:24,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:24" (1/1) ... [2019-12-07 22:07:24,436 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:24" (1/1) ... [2019-12-07 22:07:24,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:24" (1/1) ... [2019-12-07 22:07:24,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 22:07:24,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 22:07:24,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 22:07:24,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 22:07:24,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:24" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e18e2693-aee5-43f5-9956-d6880a019134/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 [2019-12-07 22:07:24,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 22:07:24,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 22:07:24,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 22:07:24,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-12-07 22:07:24,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-12-07 22:07:24,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 22:07:24,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 22:07:24,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 22:07:24,744 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 22:07:24,744 INFO L287 CfgBuilder]: Removed 11 assume(true) statements. [2019-12-07 22:07:24,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:07:24 BoogieIcfgContainer [2019-12-07 22:07:24,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 22:07:24,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 22:07:24,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 22:07:24,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 22:07:24,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 10:07:24" (1/3) ... [2019-12-07 22:07:24,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@106a9c4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 10:07:24, skipping insertion in model container [2019-12-07 22:07:24,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:24" (2/3) ... [2019-12-07 22:07:24,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@106a9c4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 10:07:24, skipping insertion in model container [2019-12-07 22:07:24,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:07:24" (3/3) ... [2019-12-07 22:07:24,750 INFO L109 eAbstractionObserver]: Analyzing ICFG simple-ext_1.i [2019-12-07 22:07:24,756 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 22:07:24,761 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2019-12-07 22:07:24,768 INFO L249 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2019-12-07 22:07:24,780 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 22:07:24,781 INFO L374 AbstractCegarLoop]: Hoare is false [2019-12-07 22:07:24,781 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 22:07:24,781 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 22:07:24,781 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 22:07:24,781 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 22:07:24,781 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 22:07:24,781 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 22:07:24,791 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2019-12-07 22:07:24,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 22:07:24,796 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 22:07:24,797 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 22:07:24,797 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 22:07:24,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 22:07:24,801 INFO L82 PathProgramCache]: Analyzing trace with hash 4400933, now seen corresponding path program 1 times [2019-12-07 22:07:24,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 22:07:24,807 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171168796] [2019-12-07 22:07:24,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 22:07:24,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 22:07:24,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 22:07:24,888 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171168796] [2019-12-07 22:07:24,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 22:07:24,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 22:07:24,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750455026] [2019-12-07 22:07:24,891 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 22:07:24,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 22:07:24,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 22:07:24,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 22:07:24,902 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 2 states. [2019-12-07 22:07:24,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 22:07:24,912 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2019-12-07 22:07:24,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 22:07:24,913 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2019-12-07 22:07:24,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 22:07:24,919 INFO L225 Difference]: With dead ends: 45 [2019-12-07 22:07:24,919 INFO L226 Difference]: Without dead ends: 42 [2019-12-07 22:07:24,920 INFO L630 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 [2019-12-07 22:07:24,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-12-07 22:07:24,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-12-07 22:07:24,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-07 22:07:24,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2019-12-07 22:07:24,942 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 4 [2019-12-07 22:07:24,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 22:07:24,943 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2019-12-07 22:07:24,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 22:07:24,943 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2019-12-07 22:07:24,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 22:07:24,943 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 22:07:24,943 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 22:07:24,943 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 22:07:24,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 22:07:24,944 INFO L82 PathProgramCache]: Analyzing trace with hash 136503155, now seen corresponding path program 1 times [2019-12-07 22:07:24,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 22:07:24,944 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130574624] [2019-12-07 22:07:24,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 22:07:24,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 22:07:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 22:07:24,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130574624] [2019-12-07 22:07:24,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 22:07:24,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 22:07:24,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24527939] [2019-12-07 22:07:24,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 22:07:24,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 22:07:24,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 22:07:24,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 22:07:24,984 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 4 states. [2019-12-07 22:07:25,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 22:07:25,062 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2019-12-07 22:07:25,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 22:07:25,062 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-12-07 22:07:25,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 22:07:25,063 INFO L225 Difference]: With dead ends: 56 [2019-12-07 22:07:25,063 INFO L226 Difference]: Without dead ends: 56 [2019-12-07 22:07:25,063 INFO L630 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 [2019-12-07 22:07:25,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-12-07 22:07:25,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 45. [2019-12-07 22:07:25,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-12-07 22:07:25,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2019-12-07 22:07:25,068 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 5 [2019-12-07 22:07:25,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 22:07:25,068 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2019-12-07 22:07:25,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 22:07:25,068 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2019-12-07 22:07:25,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 22:07:25,068 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 22:07:25,069 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 22:07:25,069 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 22:07:25,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 22:07:25,069 INFO L82 PathProgramCache]: Analyzing trace with hash 136503156, now seen corresponding path program 1 times [2019-12-07 22:07:25,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 22:07:25,069 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928541930] [2019-12-07 22:07:25,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 22:07:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 22:07:25,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 22:07:25,109 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928541930] [2019-12-07 22:07:25,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 22:07:25,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 22:07:25,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885250337] [2019-12-07 22:07:25,110 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 22:07:25,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 22:07:25,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 22:07:25,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 22:07:25,111 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand 4 states. [2019-12-07 22:07:25,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 22:07:25,193 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2019-12-07 22:07:25,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 22:07:25,194 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-12-07 22:07:25,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 22:07:25,194 INFO L225 Difference]: With dead ends: 59 [2019-12-07 22:07:25,194 INFO L226 Difference]: Without dead ends: 59 [2019-12-07 22:07:25,195 INFO L630 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 [2019-12-07 22:07:25,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-07 22:07:25,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2019-12-07 22:07:25,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-07 22:07:25,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2019-12-07 22:07:25,199 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 5 [2019-12-07 22:07:25,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 22:07:25,199 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2019-12-07 22:07:25,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 22:07:25,199 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2019-12-07 22:07:25,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 22:07:25,199 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 22:07:25,200 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 22:07:25,200 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 22:07:25,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 22:07:25,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1947846723, now seen corresponding path program 1 times [2019-12-07 22:07:25,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 22:07:25,200 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559885074] [2019-12-07 22:07:25,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 22:07:25,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 22:07:25,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 22:07:25,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559885074] [2019-12-07 22:07:25,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 22:07:25,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 22:07:25,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920065374] [2019-12-07 22:07:25,231 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 22:07:25,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 22:07:25,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 22:07:25,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 22:07:25,232 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 4 states. [2019-12-07 22:07:25,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 22:07:25,285 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2019-12-07 22:07:25,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 22:07:25,285 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-12-07 22:07:25,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 22:07:25,286 INFO L225 Difference]: With dead ends: 57 [2019-12-07 22:07:25,286 INFO L226 Difference]: Without dead ends: 57 [2019-12-07 22:07:25,286 INFO L630 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 [2019-12-07 22:07:25,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-12-07 22:07:25,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2019-12-07 22:07:25,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-07 22:07:25,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2019-12-07 22:07:25,290 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 9 [2019-12-07 22:07:25,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 22:07:25,290 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2019-12-07 22:07:25,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 22:07:25,290 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2019-12-07 22:07:25,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 22:07:25,291 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 22:07:25,291 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 22:07:25,291 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 22:07:25,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 22:07:25,291 INFO L82 PathProgramCache]: Analyzing trace with hash 251887880, now seen corresponding path program 1 times [2019-12-07 22:07:25,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 22:07:25,292 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315543466] [2019-12-07 22:07:25,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 22:07:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 22:07:25,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 22:07:25,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315543466] [2019-12-07 22:07:25,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 22:07:25,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-12-07 22:07:25,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999754932] [2019-12-07 22:07:25,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 22:07:25,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 22:07:25,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 22:07:25,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-12-07 22:07:25,406 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 7 states. [2019-12-07 22:07:25,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 22:07:25,620 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2019-12-07 22:07:25,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 22:07:25,621 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-07 22:07:25,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 22:07:25,622 INFO L225 Difference]: With dead ends: 58 [2019-12-07 22:07:25,622 INFO L226 Difference]: Without dead ends: 58 [2019-12-07 22:07:25,623 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-12-07 22:07:25,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-12-07 22:07:25,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2019-12-07 22:07:25,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-07 22:07:25,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2019-12-07 22:07:25,628 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 10 [2019-12-07 22:07:25,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 22:07:25,628 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2019-12-07 22:07:25,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 22:07:25,628 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2019-12-07 22:07:25,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 22:07:25,629 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 22:07:25,629 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 22:07:25,630 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 22:07:25,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 22:07:25,630 INFO L82 PathProgramCache]: Analyzing trace with hash 527241334, now seen corresponding path program 1 times [2019-12-07 22:07:25,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 22:07:25,631 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763667359] [2019-12-07 22:07:25,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 22:07:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 22:07:25,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 22:07:25,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763667359] [2019-12-07 22:07:25,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 22:07:25,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 22:07:25,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863266548] [2019-12-07 22:07:25,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 22:07:25,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 22:07:25,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 22:07:25,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 22:07:25,672 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 5 states. [2019-12-07 22:07:25,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 22:07:25,756 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2019-12-07 22:07:25,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 22:07:25,757 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-12-07 22:07:25,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 22:07:25,757 INFO L225 Difference]: With dead ends: 65 [2019-12-07 22:07:25,758 INFO L226 Difference]: Without dead ends: 65 [2019-12-07 22:07:25,758 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-07 22:07:25,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-07 22:07:25,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2019-12-07 22:07:25,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-07 22:07:25,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-12-07 22:07:25,761 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 11 [2019-12-07 22:07:25,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 22:07:25,761 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-12-07 22:07:25,761 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 22:07:25,762 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-12-07 22:07:25,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 22:07:25,762 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 22:07:25,762 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 22:07:25,762 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 22:07:25,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 22:07:25,763 INFO L82 PathProgramCache]: Analyzing trace with hash 527241335, now seen corresponding path program 1 times [2019-12-07 22:07:25,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 22:07:25,763 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668786598] [2019-12-07 22:07:25,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 22:07:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 22:07:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 22:07:25,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668786598] [2019-12-07 22:07:25,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 22:07:25,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 22:07:25,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175648171] [2019-12-07 22:07:25,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 22:07:25,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 22:07:25,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 22:07:25,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 22:07:25,804 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 5 states. [2019-12-07 22:07:25,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 22:07:25,920 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2019-12-07 22:07:25,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 22:07:25,920 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-12-07 22:07:25,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 22:07:25,921 INFO L225 Difference]: With dead ends: 60 [2019-12-07 22:07:25,921 INFO L226 Difference]: Without dead ends: 60 [2019-12-07 22:07:25,921 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-07 22:07:25,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-07 22:07:25,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2019-12-07 22:07:25,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-07 22:07:25,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-12-07 22:07:25,925 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 11 [2019-12-07 22:07:25,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 22:07:25,926 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-12-07 22:07:25,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 22:07:25,926 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-12-07 22:07:25,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 22:07:25,927 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 22:07:25,927 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 22:07:25,927 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 22:07:25,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 22:07:25,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1546277361, now seen corresponding path program 1 times [2019-12-07 22:07:25,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 22:07:25,928 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803856010] [2019-12-07 22:07:25,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 22:07:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 22:07:26,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 22:07:26,027 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803856010] [2019-12-07 22:07:26,027 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757673719] [2019-12-07 22:07:26,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e18e2693-aee5-43f5-9956-d6880a019134/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 [2019-12-07 22:07:26,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 22:07:26,066 INFO L264 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-07 22:07:26,070 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 22:07:26,146 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-12-07 22:07:26,146 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 22:07:26,156 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 22:07:26,158 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-12-07 22:07:26,159 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 22:07:26,166 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 22:07:26,167 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 22:07:26,167 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:28 [2019-12-07 22:07:26,219 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 22:07:26,220 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2019-12-07 22:07:26,221 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 22:07:26,230 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 22:07:26,233 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 22:07:26,235 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 22:07:26,235 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2019-12-07 22:07:26,236 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 22:07:26,246 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 22:07:26,247 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 22:07:26,247 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:49, output treesize:7 [2019-12-07 22:07:26,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 22:07:26,249 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 22:07:26,286 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 22:07:26,296 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2019-12-07 22:07:26,297 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-12-07 22:07:26,313 INFO L614 ElimStorePlain]: treesize reduction 28, result has 40.4 percent of original size [2019-12-07 22:07:26,313 INFO L502 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2019-12-07 22:07:26,314 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 22:07:26,315 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 3 xjuncts. [2019-12-07 22:07:26,315 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:24 [2019-12-07 22:07:26,365 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 22:07:26,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 22:07:26,373 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1194884662] [2019-12-07 22:07:26,388 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-12-07 22:07:26,388 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 22:07:26,392 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 22:07:26,396 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 22:07:26,396 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 22:07:26,460 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 22:07:26,575 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 22:07:27,090 WARN L192 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2019-12-07 22:07:27,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-12-07 22:07:27,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7, 7] total 23 [2019-12-07 22:07:27,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797756947] [2019-12-07 22:07:27,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 22:07:27,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 22:07:27,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 22:07:27,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2019-12-07 22:07:27,379 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 9 states. [2019-12-07 22:07:27,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 22:07:27,480 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2019-12-07 22:07:27,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 22:07:27,480 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-07 22:07:27,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 22:07:27,481 INFO L225 Difference]: With dead ends: 56 [2019-12-07 22:07:27,481 INFO L226 Difference]: Without dead ends: 56 [2019-12-07 22:07:27,481 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2019-12-07 22:07:27,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-12-07 22:07:27,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2019-12-07 22:07:27,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-12-07 22:07:27,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2019-12-07 22:07:27,484 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 12 [2019-12-07 22:07:27,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 22:07:27,484 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2019-12-07 22:07:27,484 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 22:07:27,484 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2019-12-07 22:07:27,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 22:07:27,485 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 22:07:27,485 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 22:07:27,685 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 22:07:27,686 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 22:07:27,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 22:07:27,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1680020582, now seen corresponding path program 1 times [2019-12-07 22:07:27,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 22:07:27,687 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012343475] [2019-12-07 22:07:27,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 22:07:27,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 22:07:27,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 22:07:27,741 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012343475] [2019-12-07 22:07:27,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 22:07:27,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 22:07:27,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694338797] [2019-12-07 22:07:27,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 22:07:27,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 22:07:27,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 22:07:27,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 22:07:27,742 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 4 states. [2019-12-07 22:07:27,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 22:07:27,778 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2019-12-07 22:07:27,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 22:07:27,778 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-12-07 22:07:27,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 22:07:27,779 INFO L225 Difference]: With dead ends: 56 [2019-12-07 22:07:27,779 INFO L226 Difference]: Without dead ends: 56 [2019-12-07 22:07:27,779 INFO L630 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 [2019-12-07 22:07:27,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-12-07 22:07:27,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2019-12-07 22:07:27,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-07 22:07:27,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2019-12-07 22:07:27,782 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 15 [2019-12-07 22:07:27,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 22:07:27,782 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2019-12-07 22:07:27,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 22:07:27,783 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2019-12-07 22:07:27,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 22:07:27,783 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 22:07:27,783 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 22:07:27,783 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 22:07:27,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 22:07:27,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1735493147, now seen corresponding path program 1 times [2019-12-07 22:07:27,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 22:07:27,784 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672870144] [2019-12-07 22:07:27,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 22:07:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 22:07:27,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 22:07:27,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672870144] [2019-12-07 22:07:27,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374564309] [2019-12-07 22:07:27,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e18e2693-aee5-43f5-9956-d6880a019134/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 [2019-12-07 22:07:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 22:07:27,928 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-07 22:07:27,930 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 22:07:28,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 22:07:28,123 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 22:07:28,982 WARN L192 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 46 [2019-12-07 22:07:29,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 22:07:29,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1281651682] [2019-12-07 22:07:29,211 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-12-07 22:07:29,211 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 22:07:29,212 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 22:07:29,212 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 22:07:29,212 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 22:07:29,242 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 22:07:29,290 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 22:07:29,418 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 22:07:29,518 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 22:07:29,608 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 22:07:30,173 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 22:07:30,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 22:07:30,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 22 [2019-12-07 22:07:30,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039513886] [2019-12-07 22:07:30,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-07 22:07:30,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 22:07:30,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-07 22:07:30,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2019-12-07 22:07:30,175 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 23 states. [2019-12-07 22:07:31,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 22:07:31,091 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2019-12-07 22:07:31,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 22:07:31,092 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 16 [2019-12-07 22:07:31,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 22:07:31,093 INFO L225 Difference]: With dead ends: 55 [2019-12-07 22:07:31,093 INFO L226 Difference]: Without dead ends: 55 [2019-12-07 22:07:31,094 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=233, Invalid=1407, Unknown=0, NotChecked=0, Total=1640 [2019-12-07 22:07:31,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-07 22:07:31,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2019-12-07 22:07:31,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-07 22:07:31,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-12-07 22:07:31,097 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 16 [2019-12-07 22:07:31,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 22:07:31,097 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-12-07 22:07:31,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-07 22:07:31,097 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-12-07 22:07:31,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 22:07:31,098 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 22:07:31,098 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 22:07:31,298 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 22:07:31,300 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 22:07:31,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 22:07:31,300 INFO L82 PathProgramCache]: Analyzing trace with hash 239388833, now seen corresponding path program 1 times [2019-12-07 22:07:31,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 22:07:31,301 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062673076] [2019-12-07 22:07:31,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 22:07:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 22:07:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 22:07:31,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062673076] [2019-12-07 22:07:31,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313278820] [2019-12-07 22:07:31,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e18e2693-aee5-43f5-9956-d6880a019134/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 [2019-12-07 22:07:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 22:07:31,436 INFO L264 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 31 conjunts are in the unsatisfiable core [2019-12-07 22:07:31,437 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 22:07:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 22:07:31,592 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 22:07:31,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 22:07:31,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1970426477] [2019-12-07 22:07:31,971 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-12-07 22:07:31,971 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 22:07:31,971 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 22:07:31,971 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 22:07:31,971 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 22:07:32,003 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 22:07:32,147 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 22:07:32,754 WARN L192 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2019-12-07 22:07:33,515 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 22:07:33,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 22:07:33,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 18 [2019-12-07 22:07:33,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023062285] [2019-12-07 22:07:33,516 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-07 22:07:33,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 22:07:33,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 22:07:33,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2019-12-07 22:07:33,517 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 19 states. [2019-12-07 22:07:34,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 22:07:34,269 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2019-12-07 22:07:34,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 22:07:34,269 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2019-12-07 22:07:34,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 22:07:34,270 INFO L225 Difference]: With dead ends: 68 [2019-12-07 22:07:34,270 INFO L226 Difference]: Without dead ends: 68 [2019-12-07 22:07:34,271 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=383, Invalid=1687, Unknown=0, NotChecked=0, Total=2070 [2019-12-07 22:07:34,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-07 22:07:34,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 54. [2019-12-07 22:07:34,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-07 22:07:34,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2019-12-07 22:07:34,273 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 18 [2019-12-07 22:07:34,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 22:07:34,273 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2019-12-07 22:07:34,273 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-07 22:07:34,273 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2019-12-07 22:07:34,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 22:07:34,274 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 22:07:34,274 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 22:07:34,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 22:07:34,475 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2019-12-07 22:07:34,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 22:07:34,476 INFO L82 PathProgramCache]: Analyzing trace with hash 239389901, now seen corresponding path program 1 times [2019-12-07 22:07:34,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 22:07:34,477 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175555698] [2019-12-07 22:07:34,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 22:07:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 22:07:34,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 22:07:34,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175555698] [2019-12-07 22:07:34,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114260593] [2019-12-07 22:07:34,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e18e2693-aee5-43f5-9956-d6880a019134/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 [2019-12-07 22:07:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 22:07:34,583 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 22:07:34,584 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 22:07:34,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 22:07:34,620 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 22:07:34,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 22:07:34,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [717581350] [2019-12-07 22:07:34,632 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-12-07 22:07:34,632 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 22:07:34,633 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 22:07:34,633 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 22:07:34,633 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 22:07:34,660 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 22:07:34,796 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 22:07:35,253 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2019-12-07 22:07:35,781 WARN L192 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2019-12-07 22:07:35,987 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 59 [2019-12-07 22:07:36,641 WARN L192 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 68 [2019-12-07 22:07:36,979 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 66 [2019-12-07 22:07:36,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-12-07 22:07:36,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [3, 3, 3] total 18 [2019-12-07 22:07:36,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313636390] [2019-12-07 22:07:36,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 22:07:36,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 22:07:36,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 22:07:36,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-12-07 22:07:36,980 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 14 states. [2019-12-07 22:07:37,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 22:07:37,132 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2019-12-07 22:07:37,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 22:07:37,132 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2019-12-07 22:07:37,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 22:07:37,132 INFO L225 Difference]: With dead ends: 45 [2019-12-07 22:07:37,133 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 22:07:37,133 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-12-07 22:07:37,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 22:07:37,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 22:07:37,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 22:07:37,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 22:07:37,133 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2019-12-07 22:07:37,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 22:07:37,133 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 22:07:37,133 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 22:07:37,133 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 22:07:37,134 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 22:07:37,334 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 22:07:37,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 10:07:37 BoogieIcfgContainer [2019-12-07 22:07:37,342 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 22:07:37,342 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 22:07:37,342 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 22:07:37,342 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 22:07:37,342 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:07:24" (3/4) ... [2019-12-07 22:07:37,344 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 22:07:37,352 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2019-12-07 22:07:37,352 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2019-12-07 22:07:37,352 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 22:07:37,381 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e18e2693-aee5-43f5-9956-d6880a019134/bin/utaipan/witness.graphml [2019-12-07 22:07:37,381 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 22:07:37,382 INFO L168 Benchmark]: Toolchain (without parser) took 13297.02 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 253.2 MB). Free memory was 933.9 MB in the beginning and 1.1 GB in the end (delta: -146.4 MB). Peak memory consumption was 106.8 MB. Max. memory is 11.5 GB. [2019-12-07 22:07:37,382 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 954.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 22:07:37,382 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.70 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 115.9 MB). Free memory was 933.9 MB in the beginning and 1.1 GB in the end (delta: -160.7 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. [2019-12-07 22:07:37,382 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.39 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-12-07 22:07:37,383 INFO L168 Benchmark]: Boogie Preprocessor took 20.20 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-12-07 22:07:37,383 INFO L168 Benchmark]: RCFGBuilder took 305.75 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 38.0 MB). Peak memory consumption was 38.0 MB. Max. memory is 11.5 GB. [2019-12-07 22:07:37,383 INFO L168 Benchmark]: TraceAbstraction took 12595.80 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -37.7 MB). Peak memory consumption was 99.7 MB. Max. memory is 11.5 GB. [2019-12-07 22:07:37,383 INFO L168 Benchmark]: Witness Printer took 39.31 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2019-12-07 22:07:37,384 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 954.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 303.70 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 115.9 MB). Free memory was 933.9 MB in the beginning and 1.1 GB in the end (delta: -160.7 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.39 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.20 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 305.75 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 38.0 MB). Peak memory consumption was 38.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 12595.80 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -37.7 MB). Peak memory consumption was 99.7 MB. Max. memory is 11.5 GB. * Witness Printer took 39.31 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 527]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 539]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 527]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 539]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 540]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 531]: pointer dereference always succeeds For all program executions holds that pointer dereference 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: 530]: pointer dereference always succeeds For all program executions holds that pointer dereference 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: 530]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 531]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 535]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 548]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 535]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 21 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 45 locations, 21 error locations. Result: SAFE, OverallTime: 12.5s, OverallIterations: 12, TraceHistogramMax: 2, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 263 SDtfs, 649 SDslu, 342 SDs, 0 SdLazy, 1339 SolverSat, 275 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 277 GetRequests, 102 SyntacticMatches, 20 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 7.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=5, 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, 12 MinimizatonAttempts, 95 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 198 NumberOfCodeBlocks, 198 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 242 ConstructedInterpolants, 30 QuantifiedInterpolants, 51724 SizeOfPredicates, 44 NumberOfNonLiveVariables, 369 ConjunctsInSsa, 89 ConjunctsInUnsatCore, 20 InterpolantComputations, 8 PerfectInterpolantSequences, 15/32 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: OVERALL_TIME[ms]: 351, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 28, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 48, TOOLS_POST_TIME[ms]: 172, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 48, TOOLS_QUANTIFIERELIM_TIME[ms]: 163, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 38, FLUID_QUERY_TIME[ms]: 3, FLUID_QUERIES: 89, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 4, DOMAIN_JOIN_TIME[ms]: 74, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME[ms]: 19, DOMAIN_ISSUBSETEQ_APPLICATIONS: 4, DOMAIN_ISSUBSETEQ_TIME[ms]: 7, DOMAIN_ISBOTTOM_APPLICATIONS: 28, DOMAIN_ISBOTTOM_TIME[ms]: 39, LOOP_SUMMARIZER_APPLICATIONS: 3, LOOP_SUMMARIZER_CACHE_MISSES: 3, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 37, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 37, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 4, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 2, PATH_EXPR_TIME[ms]: 2, REGEX_TO_DAG_TIME[ms]: 2, DAG_COMPRESSION_TIME[ms]: 9, DAG_COMPRESSION_PROCESSED_NODES: 393, DAG_COMPRESSION_RETAINED_NODES: 85, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...