./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0b33005346e6b80bc2289c235b2b7a5c7f83b2de ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0b33005346e6b80bc2289c235b2b7a5c7f83b2de ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: IllegalStateException: Tracecheck IpTcStrategyModuleMathsat [28317174] said UNSAT, interpolant generator IpTcStrategyModuleZ3 [1207211995] failed with TRACE_FEASIBLE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 09:22:38,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 09:22:38,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 09:22:38,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 09:22:38,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 09:22:38,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 09:22:38,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 09:22:38,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 09:22:38,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 09:22:38,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 09:22:38,583 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 09:22:38,584 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 09:22:38,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 09:22:38,585 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 09:22:38,586 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 09:22:38,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 09:22:38,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 09:22:38,589 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 09:22:38,590 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 09:22:38,592 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 09:22:38,594 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 09:22:38,595 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 09:22:38,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 09:22:38,596 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 09:22:38,599 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 09:22:38,599 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 09:22:38,600 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 09:22:38,600 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 09:22:38,601 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 09:22:38,602 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 09:22:38,602 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 09:22:38,602 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 09:22:38,603 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 09:22:38,604 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 09:22:38,605 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 09:22:38,605 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 09:22:38,605 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 09:22:38,605 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 09:22:38,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 09:22:38,606 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 09:22:38,606 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 09:22:38,607 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2020-12-09 09:22:38,625 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 09:22:38,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 09:22:38,626 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 09:22:38,626 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 09:22:38,626 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 09:22:38,626 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 09:22:38,626 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 09:22:38,627 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 09:22:38,627 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 09:22:38,627 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 09:22:38,627 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 09:22:38,627 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 09:22:38,627 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 09:22:38,627 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 09:22:38,627 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 09:22:38,628 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 09:22:38,628 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 09:22:38,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 09:22:38,628 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 09:22:38,628 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 09:22:38,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 09:22:38,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 09:22:38,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 09:22:38,629 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 09:22:38,629 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 09:22:38,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 09:22:38,629 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 09:22:38,629 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 09:22:38,629 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 09:22:38,629 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 09:22:38,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 09:22:38,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 09:22:38,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 09:22:38,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 09:22:38,630 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 09:22:38,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 09:22:38,630 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 09:22:38,630 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 09:22:38,630 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b33005346e6b80bc2289c235b2b7a5c7f83b2de [2020-12-09 09:22:38,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 09:22:38,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 09:22:38,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 09:22:38,821 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 09:22:38,822 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 09:22:38,823 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/../../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2020-12-09 09:22:38,863 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/data/e9d6e6d4a/fd1261f7918c449eb75abb7c60c0eb32/FLAG2dc15ae98 [2020-12-09 09:22:39,257 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 09:22:39,257 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2020-12-09 09:22:39,267 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/data/e9d6e6d4a/fd1261f7918c449eb75abb7c60c0eb32/FLAG2dc15ae98 [2020-12-09 09:22:39,278 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/data/e9d6e6d4a/fd1261f7918c449eb75abb7c60c0eb32 [2020-12-09 09:22:39,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 09:22:39,281 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 09:22:39,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 09:22:39,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 09:22:39,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 09:22:39,285 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:22:39" (1/1) ... [2020-12-09 09:22:39,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ab16892 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:22:39, skipping insertion in model container [2020-12-09 09:22:39,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:22:39" (1/1) ... [2020-12-09 09:22:39,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 09:22:39,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 09:22:39,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:22:39,532 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 09:22:39,564 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:22:39,619 INFO L208 MainTranslator]: Completed translation [2020-12-09 09:22:39,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:22:39 WrapperNode [2020-12-09 09:22:39,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 09:22:39,621 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 09:22:39,621 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 09:22:39,621 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 09:22:39,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:22:39" (1/1) ... [2020-12-09 09:22:39,641 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:22:39" (1/1) ... [2020-12-09 09:22:39,671 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 09:22:39,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 09:22:39,672 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 09:22:39,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 09:22:39,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:22:39" (1/1) ... [2020-12-09 09:22:39,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:22:39" (1/1) ... [2020-12-09 09:22:39,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:22:39" (1/1) ... [2020-12-09 09:22:39,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:22:39" (1/1) ... [2020-12-09 09:22:39,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:22:39" (1/1) ... [2020-12-09 09:22:39,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:22:39" (1/1) ... [2020-12-09 09:22:39,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:22:39" (1/1) ... [2020-12-09 09:22:39,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 09:22:39,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 09:22:39,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 09:22:39,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 09:22:39,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:22:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 09:22:39,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 09:22:39,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 09:22:39,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 09:22:39,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 09:22:39,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 09:22:39,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-09 09:22:39,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 09:22:39,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 09:22:39,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 09:22:40,251 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 09:22:40,252 INFO L299 CfgBuilder]: Removed 31 assume(true) statements. [2020-12-09 09:22:40,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:22:40 BoogieIcfgContainer [2020-12-09 09:22:40,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 09:22:40,256 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 09:22:40,256 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 09:22:40,258 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 09:22:40,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 09:22:39" (1/3) ... [2020-12-09 09:22:40,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e148f6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:22:40, skipping insertion in model container [2020-12-09 09:22:40,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:22:39" (2/3) ... [2020-12-09 09:22:40,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e148f6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:22:40, skipping insertion in model container [2020-12-09 09:22:40,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:22:40" (3/3) ... [2020-12-09 09:22:40,260 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_1.i [2020-12-09 09:22:40,270 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 09:22:40,272 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 67 error locations. [2020-12-09 09:22:40,279 INFO L253 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2020-12-09 09:22:40,296 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 09:22:40,297 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 09:22:40,297 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 09:22:40,297 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 09:22:40,297 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 09:22:40,297 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 09:22:40,297 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 09:22:40,297 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 09:22:40,314 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states. [2020-12-09 09:22:40,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 09:22:40,318 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:22:40,319 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 09:22:40,319 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:22:40,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:22:40,323 INFO L82 PathProgramCache]: Analyzing trace with hash 304959, now seen corresponding path program 1 times [2020-12-09 09:22:40,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:22:40,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617503648] [2020-12-09 09:22:40,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:22:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:22:40,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:22:40,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617503648] [2020-12-09 09:22:40,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:22:40,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 09:22:40,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139426868] [2020-12-09 09:22:40,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:22:40,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:22:40,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:22:40,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:22:40,500 INFO L87 Difference]: Start difference. First operand 160 states. Second operand 3 states. [2020-12-09 09:22:40,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:22:40,608 INFO L93 Difference]: Finished difference Result 171 states and 192 transitions. [2020-12-09 09:22:40,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:22:40,609 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 09:22:40,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:22:40,618 INFO L225 Difference]: With dead ends: 171 [2020-12-09 09:22:40,618 INFO L226 Difference]: Without dead ends: 169 [2020-12-09 09:22:40,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:22:40,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-09 09:22:40,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 162. [2020-12-09 09:22:40,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-09 09:22:40,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 186 transitions. [2020-12-09 09:22:40,651 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 186 transitions. Word has length 3 [2020-12-09 09:22:40,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:22:40,651 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 186 transitions. [2020-12-09 09:22:40,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:22:40,651 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 186 transitions. [2020-12-09 09:22:40,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 09:22:40,652 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:22:40,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 09:22:40,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 09:22:40,658 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:22:40,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:22:40,659 INFO L82 PathProgramCache]: Analyzing trace with hash 304960, now seen corresponding path program 1 times [2020-12-09 09:22:40,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:22:40,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429877341] [2020-12-09 09:22:40,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:22:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:22:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:22:40,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429877341] [2020-12-09 09:22:40,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:22:40,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 09:22:40,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143759308] [2020-12-09 09:22:40,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:22:40,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:22:40,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:22:40,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:22:40,715 INFO L87 Difference]: Start difference. First operand 162 states and 186 transitions. Second operand 3 states. [2020-12-09 09:22:40,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:22:40,824 INFO L93 Difference]: Finished difference Result 277 states and 312 transitions. [2020-12-09 09:22:40,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:22:40,825 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 09:22:40,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:22:40,829 INFO L225 Difference]: With dead ends: 277 [2020-12-09 09:22:40,829 INFO L226 Difference]: Without dead ends: 277 [2020-12-09 09:22:40,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:22:40,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-12-09 09:22:40,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 218. [2020-12-09 09:22:40,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-12-09 09:22:40,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 284 transitions. [2020-12-09 09:22:40,847 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 284 transitions. Word has length 3 [2020-12-09 09:22:40,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:22:40,847 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 284 transitions. [2020-12-09 09:22:40,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:22:40,847 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 284 transitions. [2020-12-09 09:22:40,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 09:22:40,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:22:40,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 09:22:40,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 09:22:40,848 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:22:40,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:22:40,849 INFO L82 PathProgramCache]: Analyzing trace with hash 9453712, now seen corresponding path program 1 times [2020-12-09 09:22:40,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:22:40,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988148004] [2020-12-09 09:22:40,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:22:40,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:22:40,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:22:40,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988148004] [2020-12-09 09:22:40,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:22:40,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 09:22:40,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194211115] [2020-12-09 09:22:40,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 09:22:40,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:22:40,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 09:22:40,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:22:40,961 INFO L87 Difference]: Start difference. First operand 218 states and 284 transitions. Second operand 4 states. [2020-12-09 09:22:41,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:22:41,195 INFO L93 Difference]: Finished difference Result 325 states and 394 transitions. [2020-12-09 09:22:41,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 09:22:41,196 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-09 09:22:41,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:22:41,197 INFO L225 Difference]: With dead ends: 325 [2020-12-09 09:22:41,197 INFO L226 Difference]: Without dead ends: 325 [2020-12-09 09:22:41,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 09:22:41,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-12-09 09:22:41,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 242. [2020-12-09 09:22:41,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-12-09 09:22:41,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 321 transitions. [2020-12-09 09:22:41,209 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 321 transitions. Word has length 4 [2020-12-09 09:22:41,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:22:41,209 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 321 transitions. [2020-12-09 09:22:41,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 09:22:41,209 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 321 transitions. [2020-12-09 09:22:41,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 09:22:41,209 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:22:41,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 09:22:41,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 09:22:41,210 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:22:41,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:22:41,210 INFO L82 PathProgramCache]: Analyzing trace with hash 293065119, now seen corresponding path program 1 times [2020-12-09 09:22:41,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:22:41,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52557387] [2020-12-09 09:22:41,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:22:41,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:22:41,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:22:41,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52557387] [2020-12-09 09:22:41,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:22:41,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 09:22:41,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689912669] [2020-12-09 09:22:41,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 09:22:41,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:22:41,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 09:22:41,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:22:41,314 INFO L87 Difference]: Start difference. First operand 242 states and 321 transitions. Second operand 4 states. [2020-12-09 09:22:41,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:22:41,471 INFO L93 Difference]: Finished difference Result 297 states and 346 transitions. [2020-12-09 09:22:41,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 09:22:41,471 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-09 09:22:41,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:22:41,473 INFO L225 Difference]: With dead ends: 297 [2020-12-09 09:22:41,473 INFO L226 Difference]: Without dead ends: 297 [2020-12-09 09:22:41,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 09:22:41,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-12-09 09:22:41,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 242. [2020-12-09 09:22:41,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-12-09 09:22:41,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 318 transitions. [2020-12-09 09:22:41,481 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 318 transitions. Word has length 5 [2020-12-09 09:22:41,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:22:41,481 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 318 transitions. [2020-12-09 09:22:41,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 09:22:41,481 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 318 transitions. [2020-12-09 09:22:41,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 09:22:41,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:22:41,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 09:22:41,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 09:22:41,482 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:22:41,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:22:41,482 INFO L82 PathProgramCache]: Analyzing trace with hash 495084146, now seen corresponding path program 1 times [2020-12-09 09:22:41,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:22:41,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123193313] [2020-12-09 09:22:41,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:22:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:22:41,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:22:41,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123193313] [2020-12-09 09:22:41,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:22:41,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 09:22:41,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010226268] [2020-12-09 09:22:41,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 09:22:41,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:22:41,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 09:22:41,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:22:41,513 INFO L87 Difference]: Start difference. First operand 242 states and 318 transitions. Second operand 4 states. [2020-12-09 09:22:41,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:22:41,582 INFO L93 Difference]: Finished difference Result 263 states and 339 transitions. [2020-12-09 09:22:41,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:22:41,583 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 09:22:41,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:22:41,584 INFO L225 Difference]: With dead ends: 263 [2020-12-09 09:22:41,584 INFO L226 Difference]: Without dead ends: 263 [2020-12-09 09:22:41,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:22:41,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-12-09 09:22:41,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 251. [2020-12-09 09:22:41,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-12-09 09:22:41,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 334 transitions. [2020-12-09 09:22:41,590 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 334 transitions. Word has length 6 [2020-12-09 09:22:41,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:22:41,590 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 334 transitions. [2020-12-09 09:22:41,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 09:22:41,590 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 334 transitions. [2020-12-09 09:22:41,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 09:22:41,591 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:22:41,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:22:41,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 09:22:41,591 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:22:41,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:22:41,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1832260607, now seen corresponding path program 1 times [2020-12-09 09:22:41,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:22:41,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176146498] [2020-12-09 09:22:41,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:22:41,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:22:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:22:41,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176146498] [2020-12-09 09:22:41,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:22:41,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 09:22:41,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373660296] [2020-12-09 09:22:41,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:22:41,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:22:41,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:22:41,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:22:41,640 INFO L87 Difference]: Start difference. First operand 251 states and 334 transitions. Second operand 3 states. [2020-12-09 09:22:41,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:22:41,679 INFO L93 Difference]: Finished difference Result 253 states and 335 transitions. [2020-12-09 09:22:41,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:22:41,680 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-09 09:22:41,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:22:41,681 INFO L225 Difference]: With dead ends: 253 [2020-12-09 09:22:41,681 INFO L226 Difference]: Without dead ends: 253 [2020-12-09 09:22:41,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:22:41,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-12-09 09:22:41,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 250. [2020-12-09 09:22:41,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-12-09 09:22:41,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 332 transitions. [2020-12-09 09:22:41,686 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 332 transitions. Word has length 7 [2020-12-09 09:22:41,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:22:41,686 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 332 transitions. [2020-12-09 09:22:41,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:22:41,686 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 332 transitions. [2020-12-09 09:22:41,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 09:22:41,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:22:41,687 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:22:41,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 09:22:41,687 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:22:41,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:22:41,688 INFO L82 PathProgramCache]: Analyzing trace with hash 70903527, now seen corresponding path program 1 times [2020-12-09 09:22:41,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:22:41,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162281352] [2020-12-09 09:22:41,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:22:41,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:22:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:22:41,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162281352] [2020-12-09 09:22:41,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076522288] [2020-12-09 09:22:41,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:22:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:22:41,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 09:22:41,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:22:41,973 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2020-12-09 09:22:41,973 INFO L348 Elim1Store]: treesize reduction 190, result has 33.6 percent of original size [2020-12-09 09:22:41,974 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 101 [2020-12-09 09:22:41,979 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 09:22:42,027 INFO L625 ElimStorePlain]: treesize reduction 50, result has 53.3 percent of original size [2020-12-09 09:22:42,036 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 09:22:42,036 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:28, output treesize:12 [2020-12-09 09:22:42,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:22:42,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:22:42,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:22:42,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [466492471] [2020-12-09 09:22:42,137 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 09:22:42,137 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 09:22:42,141 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 09:22:42,145 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 09:22:42,145 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 09:22:42,207 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:22:42,298 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:22:42,308 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:22:42,917 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 09:22:43,080 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-12-09 09:22:44,718 WARN L197 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 257 DAG size of output: 197 [2020-12-09 09:22:46,394 WARN L197 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 267 DAG size of output: 204 [2020-12-09 09:22:46,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 09:22:46,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 2, 2] total 9 [2020-12-09 09:22:46,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832596918] [2020-12-09 09:22:46,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 09:22:46,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:22:46,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 09:22:46,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-12-09 09:22:46,885 INFO L87 Difference]: Start difference. First operand 250 states and 332 transitions. Second operand 5 states. [2020-12-09 09:22:47,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:22:47,464 INFO L93 Difference]: Finished difference Result 299 states and 381 transitions. [2020-12-09 09:22:47,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 09:22:47,465 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 09:22:47,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:22:47,466 INFO L225 Difference]: With dead ends: 299 [2020-12-09 09:22:47,466 INFO L226 Difference]: Without dead ends: 299 [2020-12-09 09:22:47,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-12-09 09:22:47,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-12-09 09:22:47,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 273. [2020-12-09 09:22:47,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-12-09 09:22:47,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 373 transitions. [2020-12-09 09:22:47,471 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 373 transitions. Word has length 11 [2020-12-09 09:22:47,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:22:47,472 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 373 transitions. [2020-12-09 09:22:47,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 09:22:47,472 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 373 transitions. [2020-12-09 09:22:47,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 09:22:47,472 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:22:47,472 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:22:47,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-09 09:22:47,675 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:22:47,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:22:47,676 INFO L82 PathProgramCache]: Analyzing trace with hash -572674335, now seen corresponding path program 1 times [2020-12-09 09:22:47,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:22:47,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059931986] [2020-12-09 09:22:47,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:22:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:22:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:22:47,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059931986] [2020-12-09 09:22:47,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954009003] [2020-12-09 09:22:47,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:22:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:22:47,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 09:22:47,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:22:47,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:22:47,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:22:47,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:22:47,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [369585920] [2020-12-09 09:22:47,808 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2020-12-09 09:22:47,808 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 09:22:47,809 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 09:22:47,809 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 09:22:47,809 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 09:22:47,841 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:22:47,918 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:22:47,926 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:22:48,624 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 09:22:48,807 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-12-09 09:22:48,928 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-12-09 09:22:49,093 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2020-12-09 09:22:49,263 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 80 [2020-12-09 09:22:49,451 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 83 [2020-12-09 09:22:49,857 WARN L197 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 83 [2020-12-09 09:22:51,918 WARN L197 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 265 DAG size of output: 203 [2020-12-09 09:22:53,864 WARN L197 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 260 DAG size of output: 199 [2020-12-09 09:22:53,999 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-12-09 09:22:54,088 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 09:22:54,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 09:22:54,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2020-12-09 09:22:54,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400212758] [2020-12-09 09:22:54,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 09:22:54,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:22:54,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 09:22:54,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-12-09 09:22:54,090 INFO L87 Difference]: Start difference. First operand 273 states and 373 transitions. Second operand 5 states. [2020-12-09 09:22:54,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:22:54,149 INFO L93 Difference]: Finished difference Result 373 states and 470 transitions. [2020-12-09 09:22:54,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 09:22:54,149 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-09 09:22:54,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:22:54,151 INFO L225 Difference]: With dead ends: 373 [2020-12-09 09:22:54,151 INFO L226 Difference]: Without dead ends: 373 [2020-12-09 09:22:54,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-12-09 09:22:54,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-12-09 09:22:54,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 287. [2020-12-09 09:22:54,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-12-09 09:22:54,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 388 transitions. [2020-12-09 09:22:54,157 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 388 transitions. Word has length 13 [2020-12-09 09:22:54,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:22:54,157 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 388 transitions. [2020-12-09 09:22:54,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 09:22:54,157 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 388 transitions. [2020-12-09 09:22:54,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 09:22:54,157 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:22:54,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:22:54,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:22:54,360 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:22:54,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:22:54,361 INFO L82 PathProgramCache]: Analyzing trace with hash 524639606, now seen corresponding path program 1 times [2020-12-09 09:22:54,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:22:54,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008698495] [2020-12-09 09:22:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:22:54,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:22:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:22:54,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008698495] [2020-12-09 09:22:54,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:22:54,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 09:22:54,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736235535] [2020-12-09 09:22:54,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:22:54,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:22:54,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:22:54,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:22:54,410 INFO L87 Difference]: Start difference. First operand 287 states and 388 transitions. Second operand 3 states. [2020-12-09 09:22:54,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:22:54,427 INFO L93 Difference]: Finished difference Result 361 states and 459 transitions. [2020-12-09 09:22:54,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:22:54,427 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-09 09:22:54,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:22:54,429 INFO L225 Difference]: With dead ends: 361 [2020-12-09 09:22:54,429 INFO L226 Difference]: Without dead ends: 361 [2020-12-09 09:22:54,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:22:54,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-12-09 09:22:54,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 262. [2020-12-09 09:22:54,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-12-09 09:22:54,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 344 transitions. [2020-12-09 09:22:54,434 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 344 transitions. Word has length 17 [2020-12-09 09:22:54,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:22:54,434 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 344 transitions. [2020-12-09 09:22:54,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:22:54,435 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 344 transitions. [2020-12-09 09:22:54,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 09:22:54,435 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:22:54,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:22:54,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-12-09 09:22:54,436 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:22:54,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:22:54,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1037719910, now seen corresponding path program 1 times [2020-12-09 09:22:54,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:22:54,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079209470] [2020-12-09 09:22:54,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:22:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:22:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:22:54,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079209470] [2020-12-09 09:22:54,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:22:54,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 09:22:54,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874998921] [2020-12-09 09:22:54,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 09:22:54,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:22:54,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 09:22:54,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 09:22:54,487 INFO L87 Difference]: Start difference. First operand 262 states and 344 transitions. Second operand 5 states. [2020-12-09 09:22:54,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:22:54,649 INFO L93 Difference]: Finished difference Result 347 states and 410 transitions. [2020-12-09 09:22:54,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 09:22:54,650 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-12-09 09:22:54,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:22:54,651 INFO L225 Difference]: With dead ends: 347 [2020-12-09 09:22:54,651 INFO L226 Difference]: Without dead ends: 347 [2020-12-09 09:22:54,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-09 09:22:54,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-12-09 09:22:54,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 258. [2020-12-09 09:22:54,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-12-09 09:22:54,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 320 transitions. [2020-12-09 09:22:54,656 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 320 transitions. Word has length 19 [2020-12-09 09:22:54,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:22:54,656 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 320 transitions. [2020-12-09 09:22:54,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 09:22:54,656 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 320 transitions. [2020-12-09 09:22:54,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-09 09:22:54,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:22:54,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:22:54,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-12-09 09:22:54,657 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:22:54,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:22:54,657 INFO L82 PathProgramCache]: Analyzing trace with hash 812048495, now seen corresponding path program 1 times [2020-12-09 09:22:54,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:22:54,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542881206] [2020-12-09 09:22:54,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:22:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:22:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:22:54,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542881206] [2020-12-09 09:22:54,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:22:54,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 09:22:54,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745126985] [2020-12-09 09:22:54,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 09:22:54,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:22:54,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 09:22:54,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:22:54,683 INFO L87 Difference]: Start difference. First operand 258 states and 320 transitions. Second operand 4 states. [2020-12-09 09:22:54,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:22:54,845 INFO L93 Difference]: Finished difference Result 368 states and 445 transitions. [2020-12-09 09:22:54,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 09:22:54,846 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-12-09 09:22:54,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:22:54,848 INFO L225 Difference]: With dead ends: 368 [2020-12-09 09:22:54,848 INFO L226 Difference]: Without dead ends: 368 [2020-12-09 09:22:54,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:22:54,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-12-09 09:22:54,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 277. [2020-12-09 09:22:54,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-12-09 09:22:54,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 354 transitions. [2020-12-09 09:22:54,856 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 354 transitions. Word has length 20 [2020-12-09 09:22:54,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:22:54,856 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 354 transitions. [2020-12-09 09:22:54,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 09:22:54,856 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 354 transitions. [2020-12-09 09:22:54,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-09 09:22:54,857 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:22:54,857 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:22:54,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-12-09 09:22:54,857 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:22:54,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:22:54,858 INFO L82 PathProgramCache]: Analyzing trace with hash -596300355, now seen corresponding path program 1 times [2020-12-09 09:22:54,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:22:54,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491508000] [2020-12-09 09:22:54,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:22:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:22:54,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:22:54,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491508000] [2020-12-09 09:22:54,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:22:54,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 09:22:54,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079311439] [2020-12-09 09:22:54,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 09:22:54,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:22:54,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 09:22:54,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:22:54,914 INFO L87 Difference]: Start difference. First operand 277 states and 354 transitions. Second operand 4 states. [2020-12-09 09:22:55,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:22:55,040 INFO L93 Difference]: Finished difference Result 250 states and 318 transitions. [2020-12-09 09:22:55,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 09:22:55,041 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-12-09 09:22:55,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:22:55,042 INFO L225 Difference]: With dead ends: 250 [2020-12-09 09:22:55,042 INFO L226 Difference]: Without dead ends: 250 [2020-12-09 09:22:55,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 09:22:55,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-12-09 09:22:55,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2020-12-09 09:22:55,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-12-09 09:22:55,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 318 transitions. [2020-12-09 09:22:55,046 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 318 transitions. Word has length 21 [2020-12-09 09:22:55,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:22:55,046 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 318 transitions. [2020-12-09 09:22:55,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 09:22:55,046 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 318 transitions. [2020-12-09 09:22:55,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-09 09:22:55,046 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:22:55,046 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:22:55,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-12-09 09:22:55,047 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:22:55,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:22:55,047 INFO L82 PathProgramCache]: Analyzing trace with hash -816419303, now seen corresponding path program 1 times [2020-12-09 09:22:55,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:22:55,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877798822] [2020-12-09 09:22:55,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:22:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:22:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:22:55,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877798822] [2020-12-09 09:22:55,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:22:55,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-09 09:22:55,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811178056] [2020-12-09 09:22:55,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 09:22:55,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:22:55,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 09:22:55,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-09 09:22:55,240 INFO L87 Difference]: Start difference. First operand 250 states and 318 transitions. Second operand 10 states. [2020-12-09 09:22:55,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:22:55,780 INFO L93 Difference]: Finished difference Result 607 states and 699 transitions. [2020-12-09 09:22:55,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-09 09:22:55,780 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-12-09 09:22:55,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:22:55,782 INFO L225 Difference]: With dead ends: 607 [2020-12-09 09:22:55,782 INFO L226 Difference]: Without dead ends: 607 [2020-12-09 09:22:55,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-12-09 09:22:55,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2020-12-09 09:22:55,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 290. [2020-12-09 09:22:55,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-12-09 09:22:55,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 375 transitions. [2020-12-09 09:22:55,789 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 375 transitions. Word has length 21 [2020-12-09 09:22:55,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:22:55,789 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 375 transitions. [2020-12-09 09:22:55,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 09:22:55,789 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 375 transitions. [2020-12-09 09:22:55,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 09:22:55,789 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:22:55,790 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:22:55,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-12-09 09:22:55,790 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:22:55,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:22:55,790 INFO L82 PathProgramCache]: Analyzing trace with hash 460805525, now seen corresponding path program 1 times [2020-12-09 09:22:55,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:22:55,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910066108] [2020-12-09 09:22:55,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:22:55,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:22:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:22:55,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910066108] [2020-12-09 09:22:55,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:22:55,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 09:22:55,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681811857] [2020-12-09 09:22:55,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 09:22:55,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:22:55,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 09:22:55,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 09:22:55,831 INFO L87 Difference]: Start difference. First operand 290 states and 375 transitions. Second operand 5 states. [2020-12-09 09:22:55,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:22:55,980 INFO L93 Difference]: Finished difference Result 389 states and 468 transitions. [2020-12-09 09:22:55,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 09:22:55,981 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-12-09 09:22:55,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:22:55,982 INFO L225 Difference]: With dead ends: 389 [2020-12-09 09:22:55,982 INFO L226 Difference]: Without dead ends: 389 [2020-12-09 09:22:55,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-09 09:22:55,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-12-09 09:22:55,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 290. [2020-12-09 09:22:55,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-12-09 09:22:55,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 372 transitions. [2020-12-09 09:22:55,989 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 372 transitions. Word has length 22 [2020-12-09 09:22:55,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:22:55,989 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 372 transitions. [2020-12-09 09:22:55,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 09:22:55,989 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 372 transitions. [2020-12-09 09:22:55,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 09:22:55,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:22:55,989 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 09:22:55,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-12-09 09:22:55,990 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:22:55,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:22:55,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1394110309, now seen corresponding path program 1 times [2020-12-09 09:22:55,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:22:55,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594795803] [2020-12-09 09:22:55,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:22:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:22:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 09:22:56,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594795803] [2020-12-09 09:22:56,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938416894] [2020-12-09 09:22:56,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:22:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:22:56,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 09:22:56,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:22:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 09:22:56,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:22:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 09:22:56,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [589969434] [2020-12-09 09:22:56,313 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-12-09 09:22:56,313 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 09:22:56,313 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 09:22:56,314 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 09:22:56,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 09:22:56,347 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:22:56,360 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:22:56,441 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:22:57,134 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 09:22:57,358 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-12-09 09:22:57,486 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-12-09 09:22:57,664 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2020-12-09 09:22:57,848 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 80 [2020-12-09 09:22:58,046 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 83 [2020-12-09 09:22:58,476 WARN L197 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 83 [2020-12-09 09:23:00,618 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 265 DAG size of output: 203 [2020-12-09 09:23:02,685 WARN L197 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 260 DAG size of output: 199 [2020-12-09 09:23:02,835 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-12-09 09:23:03,061 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 09:23:03,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 09:23:03,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2020-12-09 09:23:03,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031097616] [2020-12-09 09:23:03,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-09 09:23:03,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:23:03,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-09 09:23:03,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2020-12-09 09:23:03,062 INFO L87 Difference]: Start difference. First operand 290 states and 372 transitions. Second operand 13 states. [2020-12-09 09:23:03,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:23:03,487 INFO L93 Difference]: Finished difference Result 536 states and 620 transitions. [2020-12-09 09:23:03,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-09 09:23:03,487 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-12-09 09:23:03,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:23:03,489 INFO L225 Difference]: With dead ends: 536 [2020-12-09 09:23:03,489 INFO L226 Difference]: Without dead ends: 536 [2020-12-09 09:23:03,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-12-09 09:23:03,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-12-09 09:23:03,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 278. [2020-12-09 09:23:03,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-12-09 09:23:03,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 353 transitions. [2020-12-09 09:23:03,497 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 353 transitions. Word has length 22 [2020-12-09 09:23:03,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:23:03,497 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 353 transitions. [2020-12-09 09:23:03,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-09 09:23:03,497 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 353 transitions. [2020-12-09 09:23:03,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-09 09:23:03,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:23:03,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:23:03,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-09 09:23:03,698 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:23:03,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:23:03,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1400069531, now seen corresponding path program 1 times [2020-12-09 09:23:03,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:23:03,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339055171] [2020-12-09 09:23:03,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:23:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:23:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:23:03,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339055171] [2020-12-09 09:23:03,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:23:03,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 09:23:03,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28626010] [2020-12-09 09:23:03,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 09:23:03,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:23:03,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 09:23:03,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 09:23:03,806 INFO L87 Difference]: Start difference. First operand 278 states and 353 transitions. Second operand 5 states. [2020-12-09 09:23:03,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:23:03,921 INFO L93 Difference]: Finished difference Result 282 states and 352 transitions. [2020-12-09 09:23:03,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 09:23:03,922 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-12-09 09:23:03,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:23:03,923 INFO L225 Difference]: With dead ends: 282 [2020-12-09 09:23:03,923 INFO L226 Difference]: Without dead ends: 282 [2020-12-09 09:23:03,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 09:23:03,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-12-09 09:23:03,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 277. [2020-12-09 09:23:03,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-12-09 09:23:03,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 347 transitions. [2020-12-09 09:23:03,927 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 347 transitions. Word has length 23 [2020-12-09 09:23:03,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:23:03,928 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 347 transitions. [2020-12-09 09:23:03,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 09:23:03,928 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 347 transitions. [2020-12-09 09:23:03,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-09 09:23:03,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:23:03,928 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:23:03,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2020-12-09 09:23:03,929 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:23:03,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:23:03,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1989629247, now seen corresponding path program 1 times [2020-12-09 09:23:03,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:23:03,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505951189] [2020-12-09 09:23:03,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:23:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:23:03,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:23:03,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505951189] [2020-12-09 09:23:03,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071889396] [2020-12-09 09:23:03,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:23:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:23:04,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 09:23:04,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:23:04,351 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2020-12-09 09:23:04,689 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2020-12-09 09:23:05,089 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2020-12-09 09:23:05,418 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2020-12-09 09:23:05,806 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2020-12-09 09:23:06,110 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2020-12-09 09:23:06,532 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2020-12-09 09:23:06,891 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2020-12-09 09:23:07,205 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2020-12-09 09:23:07,522 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2020-12-09 09:23:07,793 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2020-12-09 09:23:09,055 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2020-12-09 09:23:16,838 WARN L197 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 28 [2020-12-09 09:23:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:23:16,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:23:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:23:17,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2070087021] [2020-12-09 09:23:17,218 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2020-12-09 09:23:17,218 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 09:23:17,219 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 09:23:17,219 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 09:23:17,219 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 09:23:17,246 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:23:17,254 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:23:17,326 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:23:17,626 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:23:17,902 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 09:23:18,084 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2020-12-09 09:23:18,858 WARN L197 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 183 [2020-12-09 09:23:19,851 WARN L197 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 191 [2020-12-09 09:23:21,900 WARN L197 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 190 [2020-12-09 09:23:23,376 WARN L197 SmtUtils]: Spent 822.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 204 [2020-12-09 09:23:24,314 WARN L197 SmtUtils]: Spent 830.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 212 [2020-12-09 09:23:25,526 WARN L197 SmtUtils]: Spent 831.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 212 [2020-12-09 09:23:26,402 WARN L197 SmtUtils]: Spent 755.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 208 [2020-12-09 09:23:26,573 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-12-09 09:23:26,748 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-12-09 09:23:26,973 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2020-12-09 09:23:27,195 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 82 [2020-12-09 09:23:27,449 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-12-09 09:23:27,742 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 87 [2020-12-09 09:23:27,927 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-12-09 09:23:27,979 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 09:23:27,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 09:23:27,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2020-12-09 09:23:27,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400865826] [2020-12-09 09:23:27,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-09 09:23:27,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:23:27,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-09 09:23:27,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2020-12-09 09:23:27,980 INFO L87 Difference]: Start difference. First operand 277 states and 347 transitions. Second operand 15 states. [2020-12-09 09:23:30,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:23:30,514 INFO L93 Difference]: Finished difference Result 638 states and 712 transitions. [2020-12-09 09:23:30,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-09 09:23:30,515 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-12-09 09:23:30,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:23:30,517 INFO L225 Difference]: With dead ends: 638 [2020-12-09 09:23:30,517 INFO L226 Difference]: Without dead ends: 638 [2020-12-09 09:23:30,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 30 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=352, Invalid=1454, Unknown=0, NotChecked=0, Total=1806 [2020-12-09 09:23:30,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2020-12-09 09:23:30,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 269. [2020-12-09 09:23:30,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-12-09 09:23:30,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 333 transitions. [2020-12-09 09:23:30,523 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 333 transitions. Word has length 27 [2020-12-09 09:23:30,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:23:30,523 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 333 transitions. [2020-12-09 09:23:30,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-09 09:23:30,523 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 333 transitions. [2020-12-09 09:23:30,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-09 09:23:30,523 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:23:30,523 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:23:30,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:23:30,725 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:23:30,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:23:30,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1548964468, now seen corresponding path program 1 times [2020-12-09 09:23:30,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:23:30,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17156259] [2020-12-09 09:23:30,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:23:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:23:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:23:30,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17156259] [2020-12-09 09:23:30,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974283145] [2020-12-09 09:23:30,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:23:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:23:30,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 09:23:30,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:23:31,113 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 37 [2020-12-09 09:23:32,782 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-12-09 09:23:33,148 WARN L197 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 53 [2020-12-09 09:23:33,310 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 36 [2020-12-09 09:23:33,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:23:33,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:23:44,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:23:44,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [203151279] [2020-12-09 09:23:44,901 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2020-12-09 09:23:44,901 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 09:23:44,901 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 09:23:44,901 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 09:23:44,901 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 09:23:44,923 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:23:45,005 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:23:45,015 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:23:45,227 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:23:45,539 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 09:23:46,001 WARN L197 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 88 [2020-12-09 09:23:46,643 WARN L197 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 183 [2020-12-09 09:23:47,449 WARN L197 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 191 [2020-12-09 09:23:48,751 WARN L197 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 190 [2020-12-09 09:23:49,899 WARN L197 SmtUtils]: Spent 938.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 204 [2020-12-09 09:23:50,841 WARN L197 SmtUtils]: Spent 826.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 212 [2020-12-09 09:23:52,087 WARN L197 SmtUtils]: Spent 865.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 212 [2020-12-09 09:23:53,033 WARN L197 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 208 [2020-12-09 09:23:53,487 WARN L197 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-12-09 09:23:53,958 WARN L197 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-12-09 09:23:54,455 WARN L197 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-12-09 09:23:54,967 WARN L197 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 87 [2020-12-09 09:23:55,529 WARN L197 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-12-09 09:23:56,080 WARN L197 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 92 [2020-12-09 09:23:56,281 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-12-09 09:23:56,340 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 09:23:56,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 09:23:56,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 17 [2020-12-09 09:23:56,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671310750] [2020-12-09 09:23:56,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-09 09:23:56,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:23:56,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-09 09:23:56,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=901, Unknown=4, NotChecked=0, Total=1122 [2020-12-09 09:23:56,341 INFO L87 Difference]: Start difference. First operand 269 states and 333 transitions. Second operand 19 states. [2020-12-09 09:23:57,596 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 48 [2020-12-09 09:23:58,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:23:58,930 INFO L93 Difference]: Finished difference Result 556 states and 638 transitions. [2020-12-09 09:23:58,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-09 09:23:58,931 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-12-09 09:23:58,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:23:58,933 INFO L225 Difference]: With dead ends: 556 [2020-12-09 09:23:58,933 INFO L226 Difference]: Without dead ends: 556 [2020-12-09 09:23:58,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 38 SyntacticMatches, 21 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=438, Invalid=1814, Unknown=4, NotChecked=0, Total=2256 [2020-12-09 09:23:58,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2020-12-09 09:23:58,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 291. [2020-12-09 09:23:58,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-12-09 09:23:58,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 362 transitions. [2020-12-09 09:23:58,938 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 362 transitions. Word has length 28 [2020-12-09 09:23:58,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:23:58,939 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 362 transitions. [2020-12-09 09:23:58,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-09 09:23:58,939 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 362 transitions. [2020-12-09 09:23:58,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-09 09:23:58,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:23:58,939 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:23:59,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-12-09 09:23:59,141 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:23:59,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:23:59,142 INFO L82 PathProgramCache]: Analyzing trace with hash -773258112, now seen corresponding path program 1 times [2020-12-09 09:23:59,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:23:59,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869226816] [2020-12-09 09:23:59,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:23:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:23:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:23:59,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869226816] [2020-12-09 09:23:59,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212952790] [2020-12-09 09:23:59,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:23:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:23:59,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-09 09:23:59,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:24:00,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:24:00,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:24:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:24:02,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [156205383] [2020-12-09 09:24:02,239 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2020-12-09 09:24:02,239 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 09:24:02,240 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 09:24:02,240 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 09:24:02,240 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 09:24:02,271 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:24:02,281 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:24:02,375 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:24:02,686 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:24:02,982 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 09:24:03,373 WARN L197 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 94 [2020-12-09 09:24:03,998 WARN L197 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 183 [2020-12-09 09:24:04,791 WARN L197 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 191 [2020-12-09 09:24:05,929 WARN L197 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 190 [2020-12-09 09:24:07,071 WARN L197 SmtUtils]: Spent 954.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 204 [2020-12-09 09:24:08,070 WARN L197 SmtUtils]: Spent 887.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 212 [2020-12-09 09:24:08,766 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-12-09 09:24:09,020 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-12-09 09:24:09,301 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-12-09 09:24:09,605 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-12-09 09:24:09,916 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2020-12-09 09:24:10,836 WARN L197 SmtUtils]: Spent 770.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 111 [2020-12-09 09:24:11,644 WARN L197 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 105 [2020-12-09 09:24:11,645 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 09:24:11,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 09:24:11,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2020-12-09 09:24:11,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673607892] [2020-12-09 09:24:11,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-09 09:24:11,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:24:11,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-09 09:24:11,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=930, Unknown=1, NotChecked=0, Total=1122 [2020-12-09 09:24:11,646 INFO L87 Difference]: Start difference. First operand 291 states and 362 transitions. Second operand 18 states. [2020-12-09 09:24:13,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:24:13,139 INFO L93 Difference]: Finished difference Result 515 states and 591 transitions. [2020-12-09 09:24:13,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-09 09:24:13,140 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2020-12-09 09:24:13,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:24:13,142 INFO L225 Difference]: With dead ends: 515 [2020-12-09 09:24:13,142 INFO L226 Difference]: Without dead ends: 515 [2020-12-09 09:24:13,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 48 SyntacticMatches, 12 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=380, Invalid=1875, Unknown=1, NotChecked=0, Total=2256 [2020-12-09 09:24:13,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2020-12-09 09:24:13,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 290. [2020-12-09 09:24:13,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-12-09 09:24:13,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 357 transitions. [2020-12-09 09:24:13,147 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 357 transitions. Word has length 29 [2020-12-09 09:24:13,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:24:13,147 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 357 transitions. [2020-12-09 09:24:13,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-09 09:24:13,147 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 357 transitions. [2020-12-09 09:24:13,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-09 09:24:13,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:24:13,148 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:24:13,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:24:13,349 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:24:13,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:24:13,350 INFO L82 PathProgramCache]: Analyzing trace with hash 899576228, now seen corresponding path program 1 times [2020-12-09 09:24:13,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:24:13,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880164551] [2020-12-09 09:24:13,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:24:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:24:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:24:13,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880164551] [2020-12-09 09:24:13,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099206056] [2020-12-09 09:24:13,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:24:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:24:13,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-09 09:24:13,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:24:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 09:24:14,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:24:14,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 09:24:14,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [956233716] [2020-12-09 09:24:14,216 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2020-12-09 09:24:14,216 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 09:24:14,216 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 09:24:14,216 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 09:24:14,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 09:24:14,329 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:24:14,338 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:24:14,346 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:24:14,925 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 09:24:15,118 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-12-09 09:24:15,280 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-12-09 09:24:15,506 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2020-12-09 09:24:15,761 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 80 [2020-12-09 09:24:16,048 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 83 [2020-12-09 09:24:16,345 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 85 [2020-12-09 09:24:18,997 WARN L197 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 272 DAG size of output: 209 [2020-12-09 09:24:21,217 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 264 DAG size of output: 194 [2020-12-09 09:24:23,502 WARN L197 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 272 DAG size of output: 199 [2020-12-09 09:24:25,390 WARN L197 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 269 DAG size of output: 188 [2020-12-09 09:24:27,210 WARN L197 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 283 DAG size of output: 199 [2020-12-09 09:24:27,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 09:24:27,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8, 6, 6] total 31 [2020-12-09 09:24:27,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296062986] [2020-12-09 09:24:27,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-09 09:24:27,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:24:27,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-09 09:24:27,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=791, Unknown=0, NotChecked=0, Total=992 [2020-12-09 09:24:27,212 INFO L87 Difference]: Start difference. First operand 290 states and 357 transitions. Second operand 13 states. [2020-12-09 09:24:28,451 WARN L197 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 216 DAG size of output: 197 [2020-12-09 09:24:29,556 WARN L197 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 201 DAG size of output: 191 [2020-12-09 09:24:30,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:24:30,220 INFO L93 Difference]: Finished difference Result 296 states and 354 transitions. [2020-12-09 09:24:30,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-09 09:24:30,221 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-12-09 09:24:30,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:24:30,222 INFO L225 Difference]: With dead ends: 296 [2020-12-09 09:24:30,222 INFO L226 Difference]: Without dead ends: 296 [2020-12-09 09:24:30,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=252, Invalid=870, Unknown=0, NotChecked=0, Total=1122 [2020-12-09 09:24:30,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-12-09 09:24:30,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 248. [2020-12-09 09:24:30,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-12-09 09:24:30,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 304 transitions. [2020-12-09 09:24:30,226 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 304 transitions. Word has length 29 [2020-12-09 09:24:30,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:24:30,226 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 304 transitions. [2020-12-09 09:24:30,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-09 09:24:30,226 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 304 transitions. [2020-12-09 09:24:30,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-09 09:24:30,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:24:30,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:24:30,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-12-09 09:24:30,428 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:24:30,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:24:30,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1919941886, now seen corresponding path program 1 times [2020-12-09 09:24:30,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:24:30,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360511893] [2020-12-09 09:24:30,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:24:30,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:24:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:24:30,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360511893] [2020-12-09 09:24:30,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:24:30,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 09:24:30,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496509212] [2020-12-09 09:24:30,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 09:24:30,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:24:30,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 09:24:30,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:24:30,484 INFO L87 Difference]: Start difference. First operand 248 states and 304 transitions. Second operand 4 states. [2020-12-09 09:24:30,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:24:30,539 INFO L93 Difference]: Finished difference Result 251 states and 301 transitions. [2020-12-09 09:24:30,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 09:24:30,539 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-12-09 09:24:30,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:24:30,540 INFO L225 Difference]: With dead ends: 251 [2020-12-09 09:24:30,540 INFO L226 Difference]: Without dead ends: 251 [2020-12-09 09:24:30,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 09:24:30,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-12-09 09:24:30,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 242. [2020-12-09 09:24:30,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-12-09 09:24:30,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 298 transitions. [2020-12-09 09:24:30,544 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 298 transitions. Word has length 30 [2020-12-09 09:24:30,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:24:30,544 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 298 transitions. [2020-12-09 09:24:30,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 09:24:30,544 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 298 transitions. [2020-12-09 09:24:30,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-09 09:24:30,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:24:30,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:24:30,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2020-12-09 09:24:30,544 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:24:30,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:24:30,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1919941630, now seen corresponding path program 1 times [2020-12-09 09:24:30,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:24:30,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752836382] [2020-12-09 09:24:30,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:24:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:24:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:24:30,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752836382] [2020-12-09 09:24:30,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:24:30,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 09:24:30,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100625085] [2020-12-09 09:24:30,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:24:30,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:24:30,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:24:30,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:24:30,565 INFO L87 Difference]: Start difference. First operand 242 states and 298 transitions. Second operand 3 states. [2020-12-09 09:24:30,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:24:30,571 INFO L93 Difference]: Finished difference Result 265 states and 328 transitions. [2020-12-09 09:24:30,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:24:30,572 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-12-09 09:24:30,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:24:30,573 INFO L225 Difference]: With dead ends: 265 [2020-12-09 09:24:30,573 INFO L226 Difference]: Without dead ends: 265 [2020-12-09 09:24:30,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:24:30,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-12-09 09:24:30,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 220. [2020-12-09 09:24:30,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-12-09 09:24:30,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 274 transitions. [2020-12-09 09:24:30,577 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 274 transitions. Word has length 30 [2020-12-09 09:24:30,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:24:30,577 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 274 transitions. [2020-12-09 09:24:30,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:24:30,577 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 274 transitions. [2020-12-09 09:24:30,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-09 09:24:30,577 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:24:30,577 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:24:30,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2020-12-09 09:24:30,578 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:24:30,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:24:30,578 INFO L82 PathProgramCache]: Analyzing trace with hash 611343845, now seen corresponding path program 1 times [2020-12-09 09:24:30,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:24:30,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166801004] [2020-12-09 09:24:30,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:24:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:24:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:24:30,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166801004] [2020-12-09 09:24:30,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:24:30,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 09:24:30,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983184746] [2020-12-09 09:24:30,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 09:24:30,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:24:30,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 09:24:30,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:24:30,605 INFO L87 Difference]: Start difference. First operand 220 states and 274 transitions. Second operand 4 states. [2020-12-09 09:24:30,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:24:30,688 INFO L93 Difference]: Finished difference Result 223 states and 271 transitions. [2020-12-09 09:24:30,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 09:24:30,689 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-12-09 09:24:30,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:24:30,690 INFO L225 Difference]: With dead ends: 223 [2020-12-09 09:24:30,690 INFO L226 Difference]: Without dead ends: 223 [2020-12-09 09:24:30,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 09:24:30,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-12-09 09:24:30,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 216. [2020-12-09 09:24:30,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-12-09 09:24:30,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 268 transitions. [2020-12-09 09:24:30,693 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 268 transitions. Word has length 31 [2020-12-09 09:24:30,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:24:30,693 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 268 transitions. [2020-12-09 09:24:30,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 09:24:30,693 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 268 transitions. [2020-12-09 09:24:30,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-09 09:24:30,694 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:24:30,694 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:24:30,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2020-12-09 09:24:30,694 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:24:30,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:24:30,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1771790180, now seen corresponding path program 1 times [2020-12-09 09:24:30,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:24:30,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113155900] [2020-12-09 09:24:30,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:24:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:24:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:24:30,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113155900] [2020-12-09 09:24:30,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:24:30,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 09:24:30,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915785599] [2020-12-09 09:24:30,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 09:24:30,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:24:30,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 09:24:30,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:24:30,720 INFO L87 Difference]: Start difference. First operand 216 states and 268 transitions. Second operand 4 states. [2020-12-09 09:24:30,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:24:30,863 INFO L93 Difference]: Finished difference Result 234 states and 285 transitions. [2020-12-09 09:24:30,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 09:24:30,863 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-12-09 09:24:30,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:24:30,864 INFO L225 Difference]: With dead ends: 234 [2020-12-09 09:24:30,864 INFO L226 Difference]: Without dead ends: 234 [2020-12-09 09:24:30,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 09:24:30,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-12-09 09:24:30,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 221. [2020-12-09 09:24:30,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-12-09 09:24:30,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 275 transitions. [2020-12-09 09:24:30,867 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 275 transitions. Word has length 32 [2020-12-09 09:24:30,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:24:30,867 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 275 transitions. [2020-12-09 09:24:30,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 09:24:30,868 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 275 transitions. [2020-12-09 09:24:30,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-09 09:24:30,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:24:30,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:24:30,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2020-12-09 09:24:30,868 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:24:30,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:24:30,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1689708849, now seen corresponding path program 1 times [2020-12-09 09:24:30,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:24:30,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709760433] [2020-12-09 09:24:30,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:24:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:24:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:24:30,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709760433] [2020-12-09 09:24:30,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:24:30,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 09:24:30,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026209968] [2020-12-09 09:24:30,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 09:24:30,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:24:30,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 09:24:30,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 09:24:30,916 INFO L87 Difference]: Start difference. First operand 221 states and 275 transitions. Second operand 6 states. [2020-12-09 09:24:31,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:24:31,067 INFO L93 Difference]: Finished difference Result 231 states and 281 transitions. [2020-12-09 09:24:31,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 09:24:31,067 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-12-09 09:24:31,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:24:31,068 INFO L225 Difference]: With dead ends: 231 [2020-12-09 09:24:31,068 INFO L226 Difference]: Without dead ends: 231 [2020-12-09 09:24:31,068 INFO L677 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 [2020-12-09 09:24:31,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-12-09 09:24:31,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 220. [2020-12-09 09:24:31,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-12-09 09:24:31,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 274 transitions. [2020-12-09 09:24:31,071 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 274 transitions. Word has length 36 [2020-12-09 09:24:31,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:24:31,071 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 274 transitions. [2020-12-09 09:24:31,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 09:24:31,072 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 274 transitions. [2020-12-09 09:24:31,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-09 09:24:31,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:24:31,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:24:31,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2020-12-09 09:24:31,072 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:24:31,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:24:31,072 INFO L82 PathProgramCache]: Analyzing trace with hash 841366936, now seen corresponding path program 1 times [2020-12-09 09:24:31,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:24:31,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176982259] [2020-12-09 09:24:31,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:24:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:24:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:24:31,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176982259] [2020-12-09 09:24:31,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:24:31,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-12-09 09:24:31,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977681472] [2020-12-09 09:24:31,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-09 09:24:31,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:24:31,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-09 09:24:31,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-12-09 09:24:31,461 INFO L87 Difference]: Start difference. First operand 220 states and 274 transitions. Second operand 17 states. [2020-12-09 09:24:31,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:24:31,861 INFO L93 Difference]: Finished difference Result 308 states and 360 transitions. [2020-12-09 09:24:31,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 09:24:31,862 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2020-12-09 09:24:31,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:24:31,863 INFO L225 Difference]: With dead ends: 308 [2020-12-09 09:24:31,863 INFO L226 Difference]: Without dead ends: 308 [2020-12-09 09:24:31,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-12-09 09:24:31,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-12-09 09:24:31,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 220. [2020-12-09 09:24:31,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-12-09 09:24:31,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 272 transitions. [2020-12-09 09:24:31,866 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 272 transitions. Word has length 37 [2020-12-09 09:24:31,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:24:31,866 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 272 transitions. [2020-12-09 09:24:31,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-09 09:24:31,866 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 272 transitions. [2020-12-09 09:24:31,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-09 09:24:31,866 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:24:31,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:24:31,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2020-12-09 09:24:31,867 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:24:31,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:24:31,867 INFO L82 PathProgramCache]: Analyzing trace with hash 2078818679, now seen corresponding path program 1 times [2020-12-09 09:24:31,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:24:31,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668273457] [2020-12-09 09:24:31,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:24:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:24:31,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:24:31,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668273457] [2020-12-09 09:24:31,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:24:31,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 09:24:31,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415694097] [2020-12-09 09:24:31,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 09:24:31,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:24:31,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 09:24:31,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:24:31,890 INFO L87 Difference]: Start difference. First operand 220 states and 272 transitions. Second operand 4 states. [2020-12-09 09:24:31,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:24:31,944 INFO L93 Difference]: Finished difference Result 232 states and 277 transitions. [2020-12-09 09:24:31,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 09:24:31,945 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-12-09 09:24:31,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:24:31,946 INFO L225 Difference]: With dead ends: 232 [2020-12-09 09:24:31,946 INFO L226 Difference]: Without dead ends: 232 [2020-12-09 09:24:31,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 09:24:31,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-12-09 09:24:31,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 220. [2020-12-09 09:24:31,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-12-09 09:24:31,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 269 transitions. [2020-12-09 09:24:31,948 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 269 transitions. Word has length 38 [2020-12-09 09:24:31,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:24:31,949 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 269 transitions. [2020-12-09 09:24:31,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 09:24:31,949 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 269 transitions. [2020-12-09 09:24:31,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-09 09:24:31,949 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:24:31,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:24:31,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2020-12-09 09:24:31,949 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:24:31,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:24:31,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1099781306, now seen corresponding path program 1 times [2020-12-09 09:24:31,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:24:31,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500253767] [2020-12-09 09:24:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:24:31,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:24:32,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:24:32,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500253767] [2020-12-09 09:24:32,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:24:32,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 09:24:32,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799700019] [2020-12-09 09:24:32,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 09:24:32,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:24:32,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 09:24:32,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-09 09:24:32,036 INFO L87 Difference]: Start difference. First operand 220 states and 269 transitions. Second operand 8 states. [2020-12-09 09:24:32,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:24:32,359 INFO L93 Difference]: Finished difference Result 237 states and 278 transitions. [2020-12-09 09:24:32,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 09:24:32,360 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-12-09 09:24:32,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:24:32,361 INFO L225 Difference]: With dead ends: 237 [2020-12-09 09:24:32,361 INFO L226 Difference]: Without dead ends: 237 [2020-12-09 09:24:32,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2020-12-09 09:24:32,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-12-09 09:24:32,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 219. [2020-12-09 09:24:32,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-12-09 09:24:32,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 265 transitions. [2020-12-09 09:24:32,364 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 265 transitions. Word has length 39 [2020-12-09 09:24:32,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:24:32,364 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 265 transitions. [2020-12-09 09:24:32,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 09:24:32,364 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 265 transitions. [2020-12-09 09:24:32,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-09 09:24:32,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:24:32,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:24:32,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2020-12-09 09:24:32,364 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:24:32,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:24:32,365 INFO L82 PathProgramCache]: Analyzing trace with hash -266517645, now seen corresponding path program 1 times [2020-12-09 09:24:32,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:24:32,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504069311] [2020-12-09 09:24:32,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:24:32,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:24:32,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:24:32,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504069311] [2020-12-09 09:24:32,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:24:32,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 09:24:32,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229490509] [2020-12-09 09:24:32,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 09:24:32,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:24:32,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 09:24:32,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-09 09:24:32,467 INFO L87 Difference]: Start difference. First operand 219 states and 265 transitions. Second operand 8 states. [2020-12-09 09:24:32,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:24:32,816 INFO L93 Difference]: Finished difference Result 273 states and 315 transitions. [2020-12-09 09:24:32,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 09:24:32,816 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-12-09 09:24:32,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:24:32,817 INFO L225 Difference]: With dead ends: 273 [2020-12-09 09:24:32,817 INFO L226 Difference]: Without dead ends: 273 [2020-12-09 09:24:32,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-12-09 09:24:32,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-12-09 09:24:32,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 242. [2020-12-09 09:24:32,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-12-09 09:24:32,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 290 transitions. [2020-12-09 09:24:32,821 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 290 transitions. Word has length 40 [2020-12-09 09:24:32,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:24:32,821 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 290 transitions. [2020-12-09 09:24:32,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 09:24:32,821 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 290 transitions. [2020-12-09 09:24:32,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-09 09:24:32,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:24:32,821 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:24:32,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2020-12-09 09:24:32,821 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:24:32,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:24:32,822 INFO L82 PathProgramCache]: Analyzing trace with hash 286689185, now seen corresponding path program 1 times [2020-12-09 09:24:32,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:24:32,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248752272] [2020-12-09 09:24:32,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:24:32,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:24:32,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 09:24:32,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248752272] [2020-12-09 09:24:32,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:24:32,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 09:24:32,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240934613] [2020-12-09 09:24:32,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 09:24:32,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:24:32,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 09:24:32,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 09:24:32,890 INFO L87 Difference]: Start difference. First operand 242 states and 290 transitions. Second operand 5 states. [2020-12-09 09:24:32,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:24:32,980 INFO L93 Difference]: Finished difference Result 245 states and 289 transitions. [2020-12-09 09:24:32,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 09:24:32,981 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-12-09 09:24:32,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:24:32,982 INFO L225 Difference]: With dead ends: 245 [2020-12-09 09:24:32,982 INFO L226 Difference]: Without dead ends: 245 [2020-12-09 09:24:32,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 09:24:32,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-12-09 09:24:32,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 218. [2020-12-09 09:24:32,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-12-09 09:24:32,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 257 transitions. [2020-12-09 09:24:32,986 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 257 transitions. Word has length 41 [2020-12-09 09:24:32,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:24:32,986 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 257 transitions. [2020-12-09 09:24:32,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 09:24:32,986 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 257 transitions. [2020-12-09 09:24:32,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-09 09:24:32,986 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:24:32,986 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:24:32,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2020-12-09 09:24:32,987 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:24:32,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:24:32,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1001723951, now seen corresponding path program 1 times [2020-12-09 09:24:32,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:24:32,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432555409] [2020-12-09 09:24:32,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:24:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:24:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 09:24:33,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432555409] [2020-12-09 09:24:33,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:24:33,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 09:24:33,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170427193] [2020-12-09 09:24:33,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 09:24:33,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:24:33,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 09:24:33,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-09 09:24:33,118 INFO L87 Difference]: Start difference. First operand 218 states and 257 transitions. Second operand 7 states. [2020-12-09 09:24:33,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:24:33,334 INFO L93 Difference]: Finished difference Result 411 states and 471 transitions. [2020-12-09 09:24:33,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 09:24:33,334 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-12-09 09:24:33,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:24:33,336 INFO L225 Difference]: With dead ends: 411 [2020-12-09 09:24:33,336 INFO L226 Difference]: Without dead ends: 411 [2020-12-09 09:24:33,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-09 09:24:33,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-12-09 09:24:33,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 228. [2020-12-09 09:24:33,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-12-09 09:24:33,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 267 transitions. [2020-12-09 09:24:33,340 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 267 transitions. Word has length 45 [2020-12-09 09:24:33,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:24:33,340 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 267 transitions. [2020-12-09 09:24:33,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 09:24:33,340 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 267 transitions. [2020-12-09 09:24:33,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-09 09:24:33,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:24:33,340 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:24:33,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2020-12-09 09:24:33,341 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:24:33,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:24:33,341 INFO L82 PathProgramCache]: Analyzing trace with hash 661363442, now seen corresponding path program 1 times [2020-12-09 09:24:33,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:24:33,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959355627] [2020-12-09 09:24:33,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:24:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:24:33,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:24:33,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959355627] [2020-12-09 09:24:33,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457403299] [2020-12-09 09:24:33,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:24:33,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:24:33,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-09 09:24:33,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:24:33,931 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 37 [2020-12-09 09:24:34,750 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-12-09 09:24:34,917 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-12-09 09:24:35,077 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-12-09 09:24:35,390 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-12-09 09:24:35,598 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-12-09 09:24:36,174 WARN L197 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2020-12-09 09:24:36,407 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 34 [2020-12-09 09:24:37,097 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 35 [2020-12-09 09:24:37,677 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-12-09 09:24:38,145 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2020-12-09 09:24:38,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:24:38,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:24:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:24:38,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1741613317] [2020-12-09 09:24:38,920 INFO L159 IcfgInterpreter]: Started Sifa with 45 locations of interest [2020-12-09 09:24:38,920 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 09:24:38,920 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 09:24:38,920 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 09:24:38,920 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 09:24:38,947 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:24:39,049 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:24:39,060 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:24:39,331 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:24:39,579 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:24:40,161 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 09:24:40,883 WARN L197 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 183 [2020-12-09 09:24:41,861 WARN L197 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 191 [2020-12-09 09:24:43,500 WARN L197 SmtUtils]: Spent 814.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 190 [2020-12-09 09:24:44,892 WARN L197 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 235 DAG size of output: 204 [2020-12-09 09:24:46,372 WARN L197 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 255 DAG size of output: 218 [2020-12-09 09:24:48,031 WARN L197 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 260 DAG size of output: 217 [2020-12-09 09:24:49,331 WARN L197 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 256 DAG size of output: 213 [2020-12-09 09:24:50,380 WARN L197 SmtUtils]: Spent 884.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 202 [2020-12-09 09:24:51,744 WARN L197 SmtUtils]: Spent 984.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 210 [2020-12-09 09:24:54,045 WARN L197 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 269 DAG size of output: 207 [2020-12-09 09:24:55,608 WARN L197 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 271 DAG size of output: 210 [2020-12-09 09:24:57,719 WARN L197 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 273 DAG size of output: 219 [2020-12-09 09:25:00,211 WARN L197 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 281 DAG size of output: 220 [2020-12-09 09:25:03,170 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 376 [2020-12-09 09:25:04,897 WARN L197 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 378 [2020-12-09 09:25:06,790 WARN L197 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 393 DAG size of output: 386 [2020-12-09 09:25:13,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 09:25:13,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [11, 7, 7] total 42 [2020-12-09 09:25:13,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062369577] [2020-12-09 09:25:13,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-09 09:25:13,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:25:13,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-09 09:25:13,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1429, Unknown=0, NotChecked=0, Total=1892 [2020-12-09 09:25:13,800 INFO L87 Difference]: Start difference. First operand 228 states and 267 transitions. Second operand 20 states. [2020-12-09 09:25:20,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:25:20,173 INFO L93 Difference]: Finished difference Result 281 states and 325 transitions. [2020-12-09 09:25:20,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-09 09:25:20,175 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-12-09 09:25:20,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:25:20,178 INFO L225 Difference]: With dead ends: 281 [2020-12-09 09:25:20,178 INFO L226 Difference]: Without dead ends: 281 [2020-12-09 09:25:20,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 68 SyntacticMatches, 41 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 35.4s TimeCoverageRelationStatistics Valid=463, Invalid=1429, Unknown=0, NotChecked=0, Total=1892 [2020-12-09 09:25:20,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-12-09 09:25:20,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 275. [2020-12-09 09:25:20,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-12-09 09:25:20,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 320 transitions. [2020-12-09 09:25:20,181 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 320 transitions. Word has length 47 [2020-12-09 09:25:20,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:25:20,181 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 320 transitions. [2020-12-09 09:25:20,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-09 09:25:20,181 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 320 transitions. [2020-12-09 09:25:20,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-09 09:25:20,182 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:25:20,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:25:20,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:25:20,383 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:25:20,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:25:20,385 INFO L82 PathProgramCache]: Analyzing trace with hash 938422116, now seen corresponding path program 1 times [2020-12-09 09:25:20,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:25:20,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889681295] [2020-12-09 09:25:20,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:25:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:25:20,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:25:20,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889681295] [2020-12-09 09:25:20,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:25:20,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 09:25:20,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506371185] [2020-12-09 09:25:20,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 09:25:20,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:25:20,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 09:25:20,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 09:25:20,466 INFO L87 Difference]: Start difference. First operand 275 states and 320 transitions. Second operand 5 states. [2020-12-09 09:25:20,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:25:20,702 INFO L93 Difference]: Finished difference Result 322 states and 372 transitions. [2020-12-09 09:25:20,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 09:25:20,703 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-12-09 09:25:20,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:25:20,704 INFO L225 Difference]: With dead ends: 322 [2020-12-09 09:25:20,705 INFO L226 Difference]: Without dead ends: 322 [2020-12-09 09:25:20,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-09 09:25:20,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-12-09 09:25:20,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 274. [2020-12-09 09:25:20,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-12-09 09:25:20,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 320 transitions. [2020-12-09 09:25:20,708 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 320 transitions. Word has length 52 [2020-12-09 09:25:20,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:25:20,708 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 320 transitions. [2020-12-09 09:25:20,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 09:25:20,708 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 320 transitions. [2020-12-09 09:25:20,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-09 09:25:20,709 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:25:20,709 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:25:20,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244 [2020-12-09 09:25:20,709 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:25:20,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:25:20,710 INFO L82 PathProgramCache]: Analyzing trace with hash 761952568, now seen corresponding path program 1 times [2020-12-09 09:25:20,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:25:20,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396473944] [2020-12-09 09:25:20,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:25:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:25:21,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:25:21,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396473944] [2020-12-09 09:25:21,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315369739] [2020-12-09 09:25:21,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:25:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:25:21,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-09 09:25:21,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:25:21,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:25:21,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:25:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:25:22,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1866792039] [2020-12-09 09:25:22,171 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2020-12-09 09:25:22,172 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 09:25:22,172 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 09:25:22,172 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 09:25:22,172 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 09:25:22,209 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:25:22,355 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:25:22,366 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:25:22,689 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:25:23,391 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 09:25:23,869 WARN L197 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 213 [2020-12-09 09:25:24,779 WARN L197 SmtUtils]: Spent 775.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 183 [2020-12-09 09:25:25,933 WARN L197 SmtUtils]: Spent 858.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 191 [2020-12-09 09:25:27,907 WARN L197 SmtUtils]: Spent 948.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 190 [2020-12-09 09:25:29,493 WARN L197 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 235 DAG size of output: 204 [2020-12-09 09:25:31,227 WARN L197 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 255 DAG size of output: 218 [2020-12-09 09:25:33,388 WARN L197 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 260 DAG size of output: 217 [2020-12-09 09:25:35,080 WARN L197 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 256 DAG size of output: 213 [2020-12-09 09:25:35,788 WARN L197 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-12-09 09:25:36,501 WARN L197 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-12-09 09:25:37,343 WARN L197 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-12-09 09:25:38,185 WARN L197 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 87 [2020-12-09 09:25:39,030 WARN L197 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-12-09 09:25:39,967 WARN L197 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 92 [2020-12-09 09:25:40,365 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-12-09 09:25:40,970 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-12-09 09:25:41,277 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-12-09 09:25:41,788 WARN L197 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-12-09 09:25:42,315 WARN L197 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 95 [2020-12-09 09:25:43,226 WARN L197 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 97 [2020-12-09 09:25:44,041 WARN L197 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 100 [2020-12-09 09:25:44,783 WARN L197 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 96 [2020-12-09 09:25:45,843 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 199 [2020-12-09 09:25:46,687 WARN L197 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 209 [2020-12-09 09:25:47,488 WARN L197 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 163 [2020-12-09 09:25:48,388 WARN L197 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 167 [2020-12-09 09:25:49,326 WARN L197 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 167 [2020-12-09 09:25:50,313 WARN L197 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 167 [2020-12-09 09:25:50,719 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 09:25:50,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 09:25:50,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 32 [2020-12-09 09:25:50,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684040385] [2020-12-09 09:25:50,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-09 09:25:50,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:25:50,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-09 09:25:50,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=3593, Unknown=0, NotChecked=0, Total=4032 [2020-12-09 09:25:50,721 INFO L87 Difference]: Start difference. First operand 274 states and 320 transitions. Second operand 34 states. [2020-12-09 09:25:55,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:25:55,023 INFO L93 Difference]: Finished difference Result 365 states and 408 transitions. [2020-12-09 09:25:55,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-09 09:25:55,024 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 53 [2020-12-09 09:25:55,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:25:55,026 INFO L225 Difference]: With dead ends: 365 [2020-12-09 09:25:55,026 INFO L226 Difference]: Without dead ends: 365 [2020-12-09 09:25:55,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 96 SyntacticMatches, 14 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3044 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=861, Invalid=5945, Unknown=0, NotChecked=0, Total=6806 [2020-12-09 09:25:55,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-12-09 09:25:55,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 220. [2020-12-09 09:25:55,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-12-09 09:25:55,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 254 transitions. [2020-12-09 09:25:55,032 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 254 transitions. Word has length 53 [2020-12-09 09:25:55,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:25:55,032 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 254 transitions. [2020-12-09 09:25:55,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-09 09:25:55,032 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 254 transitions. [2020-12-09 09:25:55,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-09 09:25:55,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:25:55,033 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:25:55,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-12-09 09:25:55,233 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:25:55,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:25:55,233 INFO L82 PathProgramCache]: Analyzing trace with hash -495767878, now seen corresponding path program 1 times [2020-12-09 09:25:55,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:25:55,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500057927] [2020-12-09 09:25:55,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:25:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 09:25:55,259 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 09:25:55,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 09:25:55,287 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 09:25:55,308 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 09:25:55,308 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 09:25:55,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290 [2020-12-09 09:25:55,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 09:25:55 BoogieIcfgContainer [2020-12-09 09:25:55,365 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 09:25:55,365 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 09:25:55,365 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 09:25:55,365 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 09:25:55,366 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:22:40" (3/4) ... [2020-12-09 09:25:55,368 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 09:25:55,368 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 09:25:55,369 INFO L168 Benchmark]: Toolchain (without parser) took 196087.46 ms. Allocated memory was 113.2 MB in the beginning and 285.2 MB in the end (delta: 172.0 MB). Free memory was 82.0 MB in the beginning and 225.0 MB in the end (delta: -143.0 MB). Peak memory consumption was 29.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:25:55,369 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 73.4 MB. Free memory was 39.7 MB in the beginning and 39.7 MB in the end (delta: 76.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:25:55,369 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.76 ms. Allocated memory is still 113.2 MB. Free memory was 81.7 MB in the beginning and 84.4 MB in the end (delta: -2.7 MB). Peak memory consumption was 28.2 MB. Max. memory is 16.1 GB. [2020-12-09 09:25:55,369 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.21 ms. Allocated memory is still 113.2 MB. Free memory was 84.4 MB in the beginning and 81.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:25:55,369 INFO L168 Benchmark]: Boogie Preprocessor took 37.28 ms. Allocated memory is still 113.2 MB. Free memory was 81.9 MB in the beginning and 79.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:25:55,370 INFO L168 Benchmark]: RCFGBuilder took 544.80 ms. Allocated memory is still 113.2 MB. Free memory was 79.8 MB in the beginning and 78.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 41.4 MB. Max. memory is 16.1 GB. [2020-12-09 09:25:55,370 INFO L168 Benchmark]: TraceAbstraction took 195109.15 ms. Allocated memory was 113.2 MB in the beginning and 285.2 MB in the end (delta: 172.0 MB). Free memory was 77.8 MB in the beginning and 225.0 MB in the end (delta: -147.2 MB). Peak memory consumption was 184.7 MB. Max. memory is 16.1 GB. [2020-12-09 09:25:55,370 INFO L168 Benchmark]: Witness Printer took 3.16 ms. Allocated memory is still 285.2 MB. Free memory is still 225.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:25:55,371 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 73.4 MB. Free memory was 39.7 MB in the beginning and 39.7 MB in the end (delta: 76.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 337.76 ms. Allocated memory is still 113.2 MB. Free memory was 81.7 MB in the beginning and 84.4 MB in the end (delta: -2.7 MB). Peak memory consumption was 28.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 50.21 ms. Allocated memory is still 113.2 MB. Free memory was 84.4 MB in the beginning and 81.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.28 ms. Allocated memory is still 113.2 MB. Free memory was 81.9 MB in the beginning and 79.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 544.80 ms. Allocated memory is still 113.2 MB. Free memory was 79.8 MB in the beginning and 78.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 41.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 195109.15 ms. Allocated memory was 113.2 MB in the beginning and 285.2 MB in the end (delta: 172.0 MB). Free memory was 77.8 MB in the beginning and 225.0 MB in the end (delta: -147.2 MB). Peak memory consumption was 184.7 MB. Max. memory is 16.1 GB. * Witness Printer took 3.16 ms. Allocated memory is still 285.2 MB. Free memory is still 225.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 722]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of strcmp at line 693. Possible FailurePath: [L685] int state = STATE_1; [L686] char *global = 0; [L687-L690] const struct command commands[] = { {"c1",c1,STATE_1}, {"c2",c2,STATE_2} }; [L692] int i = 0; VAL [commands={5:0}, global={0:0}, state=0] [L692] COND TRUE i < 2 VAL [commands={5:0}, global={0:0}, state=0] [L693] EXPR commands[i].name VAL [commands={5:0}, global={0:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={5:0}, global={0:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={5:0}, global={0:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={5:0}, global={0:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={5:0}, global={0:0}, state=0] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [commands={5:0}, global={0:0}, state=0] [L694] COND TRUE state >= commands[i].state_needed [L695] commands[i].function [L702] char *x = (char *)malloc(sizeof(char)); VAL [commands={5:0}, global={0:0}, state=0] [L703] COND FALSE !(!x) VAL [commands={5:0}, global={0:0}, state=0] [L706] COND FALSE !(\read(*global)) VAL [commands={5:0}, global={0:0}, state=0] [L709] global = x [L710] state = STATE_2 VAL [commands={5:0}, global={-3:0}, state=1] [L692] int i = 0; VAL [commands={5:0}, global={-3:0}, state=1] [L692] COND TRUE i < 2 VAL [commands={5:0}, global={-3:0}, state=1] [L693] EXPR commands[i].name VAL [commands={5:0}, global={-3:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={5:0}, global={-3:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={5:0}, global={-3:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={5:0}, global={-3:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={5:0}, global={-3:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [commands={5:0}, global={-3:0}, state=1] [L692] COND TRUE i < 2 VAL [commands={5:0}, global={-3:0}, state=1] [L693] EXPR commands[i].name VAL [commands={5:0}, global={-3:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={5:0}, global={-3:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={5:0}, global={-3:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={5:0}, global={-3:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={5:0}, global={-3:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [commands={5:0}, global={-3:0}, state=1] [L692] COND FALSE !(i < 2) VAL [commands={5:0}, global={-3:0}, state=1] [L692] int i = 0; VAL [commands={5:0}, global={-3:0}, state=1] [L692] COND TRUE i < 2 VAL [commands={5:0}, global={-3:0}, state=1] [L693] EXPR commands[i].name VAL [commands={5:0}, global={-3:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={5:0}, global={-3:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={5:0}, global={-3:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={5:0}, global={-3:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={5:0}, global={-3:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [commands={5:0}, global={-3:0}, state=1] [L692] COND TRUE i < 2 VAL [commands={5:0}, global={-3:0}, state=1] [L693] EXPR commands[i].name VAL [commands={5:0}, global={-3:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={5:0}, global={-3:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={5:0}, global={-3:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={5:0}, global={-3:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={5:0}, global={-3:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [commands={5:0}, global={-3:0}, state=1] [L692] COND FALSE !(i < 2) VAL [commands={5:0}, global={-3:0}, state=1] [L726] return 0; VAL [commands={5:0}, global={-3:0}, state=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 160 locations, 67 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 195.0s, OverallIterations: 35, TraceHistogramMax: 2, AutomataDifference: 25.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3612 SDtfs, 15934 SDslu, 6929 SDs, 0 SdLazy, 8844 SolverSat, 1779 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1043 GetRequests, 442 SyntacticMatches, 135 SemanticMatches, 466 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7846 ImplicationChecksByTransitivity, 146.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=291occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 34 MinimizatonAttempts, 2839 StatesRemovedByMinimization, 33 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 40.1s InterpolantComputationTime, 1194 NumberOfCodeBlocks, 1194 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 1347 ConstructedInterpolants, 154 QuantifiedInterpolants, 1063549 SizeOfPredicates, 85 NumberOfNonLiveVariables, 1884 ConjunctsInSsa, 138 ConjunctsInUnsatCore, 52 InterpolantComputations, 25 PerfectInterpolantSequences, 35/139 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME[ms]: 2731, ICFG_INTERPRETER_ENTERED_PROCEDURES: 3, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 70, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 124, TOOLS_POST_TIME[ms]: 1585, 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: 124, TOOLS_QUANTIFIERELIM_TIME[ms]: 1545, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 312, FLUID_QUERY_TIME[ms]: 7, FLUID_QUERIES: 210, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 7, DOMAIN_JOIN_TIME[ms]: 228, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 3, DOMAIN_WIDEN_TIME[ms]: 310, DOMAIN_ISSUBSETEQ_APPLICATIONS: 6, DOMAIN_ISSUBSETEQ_TIME[ms]: 59, DOMAIN_ISBOTTOM_APPLICATIONS: 70, DOMAIN_ISBOTTOM_TIME[ms]: 496, LOOP_SUMMARIZER_APPLICATIONS: 3, LOOP_SUMMARIZER_CACHE_MISSES: 3, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 552, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 551, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 6, 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]: 3, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 13, DAG_COMPRESSION_PROCESSED_NODES: 1681, DAG_COMPRESSION_RETAINED_NODES: 205, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 09:25:56,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 09:25:56,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 09:25:56,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 09:25:56,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 09:25:56,880 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 09:25:56,882 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 09:25:56,884 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 09:25:56,886 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 09:25:56,888 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 09:25:56,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 09:25:56,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 09:25:56,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 09:25:56,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 09:25:56,893 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 09:25:56,895 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 09:25:56,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 09:25:56,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 09:25:56,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 09:25:56,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 09:25:56,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 09:25:56,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 09:25:56,906 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 09:25:56,907 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 09:25:56,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 09:25:56,910 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 09:25:56,911 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 09:25:56,912 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 09:25:56,912 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 09:25:56,913 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 09:25:56,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 09:25:56,915 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 09:25:56,915 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 09:25:56,916 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 09:25:56,917 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 09:25:56,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 09:25:56,918 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 09:25:56,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 09:25:56,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 09:25:56,919 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 09:25:56,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 09:25:56,920 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf [2020-12-09 09:25:56,948 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 09:25:56,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 09:25:56,949 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 09:25:56,949 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 09:25:56,949 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 09:25:56,950 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 09:25:56,950 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 09:25:56,950 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 09:25:56,950 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 09:25:56,951 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 09:25:56,951 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 09:25:56,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 09:25:56,951 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 09:25:56,951 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 09:25:56,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 09:25:56,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 09:25:56,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 09:25:56,952 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 09:25:56,952 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 09:25:56,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 09:25:56,952 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 09:25:56,953 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 09:25:56,953 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 09:25:56,953 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 09:25:56,953 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 09:25:56,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 09:25:56,953 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 09:25:56,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 09:25:56,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 09:25:56,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 09:25:56,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 09:25:56,954 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 09:25:56,954 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 09:25:56,954 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 09:25:56,954 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 09:25:56,954 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b33005346e6b80bc2289c235b2b7a5c7f83b2de [2020-12-09 09:25:57,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 09:25:57,207 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 09:25:57,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 09:25:57,210 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 09:25:57,211 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 09:25:57,212 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/../../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2020-12-09 09:25:57,254 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/data/0e1597882/2558bfc8a40f4d28b880d60de5a2e2da/FLAGb2c1850f6 [2020-12-09 09:25:57,695 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 09:25:57,695 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2020-12-09 09:25:57,705 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/data/0e1597882/2558bfc8a40f4d28b880d60de5a2e2da/FLAGb2c1850f6 [2020-12-09 09:25:57,718 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/data/0e1597882/2558bfc8a40f4d28b880d60de5a2e2da [2020-12-09 09:25:57,720 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 09:25:57,721 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 09:25:57,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 09:25:57,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 09:25:57,724 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 09:25:57,725 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:25:57" (1/1) ... [2020-12-09 09:25:57,726 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1354dea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:25:57, skipping insertion in model container [2020-12-09 09:25:57,727 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:25:57" (1/1) ... [2020-12-09 09:25:57,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 09:25:57,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 09:25:57,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:25:58,003 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 09:25:58,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:25:58,108 INFO L208 MainTranslator]: Completed translation [2020-12-09 09:25:58,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:25:58 WrapperNode [2020-12-09 09:25:58,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 09:25:58,110 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 09:25:58,110 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 09:25:58,110 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 09:25:58,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:25:58" (1/1) ... [2020-12-09 09:25:58,132 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:25:58" (1/1) ... [2020-12-09 09:25:58,155 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 09:25:58,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 09:25:58,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 09:25:58,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 09:25:58,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:25:58" (1/1) ... [2020-12-09 09:25:58,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:25:58" (1/1) ... [2020-12-09 09:25:58,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:25:58" (1/1) ... [2020-12-09 09:25:58,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:25:58" (1/1) ... [2020-12-09 09:25:58,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:25:58" (1/1) ... [2020-12-09 09:25:58,181 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:25:58" (1/1) ... [2020-12-09 09:25:58,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:25:58" (1/1) ... [2020-12-09 09:25:58,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 09:25:58,187 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 09:25:58,187 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 09:25:58,187 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 09:25:58,188 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:25:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 09:25:58,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2020-12-09 09:25:58,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 09:25:58,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 09:25:58,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 09:25:58,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 09:25:58,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-09 09:25:58,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 09:25:58,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 09:25:58,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 09:25:58,902 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 09:25:58,902 INFO L299 CfgBuilder]: Removed 31 assume(true) statements. [2020-12-09 09:25:58,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:25:58 BoogieIcfgContainer [2020-12-09 09:25:58,904 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 09:25:58,905 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 09:25:58,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 09:25:58,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 09:25:58,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 09:25:57" (1/3) ... [2020-12-09 09:25:58,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@627ac5d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:25:58, skipping insertion in model container [2020-12-09 09:25:58,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:25:58" (2/3) ... [2020-12-09 09:25:58,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@627ac5d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:25:58, skipping insertion in model container [2020-12-09 09:25:58,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:25:58" (3/3) ... [2020-12-09 09:25:58,909 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_1.i [2020-12-09 09:25:58,918 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 09:25:58,920 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 67 error locations. [2020-12-09 09:25:58,927 INFO L253 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2020-12-09 09:25:58,941 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 09:25:58,941 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 09:25:58,941 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 09:25:58,941 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 09:25:58,942 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 09:25:58,942 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 09:25:58,942 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 09:25:58,942 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 09:25:58,955 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states. [2020-12-09 09:25:58,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 09:25:58,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:25:58,960 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 09:25:58,960 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:25:58,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:25:58,964 INFO L82 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2020-12-09 09:25:58,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:25:58,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527872214] [2020-12-09 09:25:58,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 09:25:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:25:59,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 09:25:59,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:25:59,329 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 33 [2020-12-09 09:25:59,331 INFO L348 Elim1Store]: treesize reduction 355, result has 14.5 percent of original size [2020-12-09 09:25:59,331 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 65 [2020-12-09 09:25:59,345 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 09:25:59,412 INFO L625 ElimStorePlain]: treesize reduction 12, result has 83.6 percent of original size [2020-12-09 09:25:59,432 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 2 disjuncts [2020-12-09 09:25:59,438 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 2 disjuncts [2020-12-09 09:25:59,442 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 2 disjuncts [2020-12-09 09:25:59,445 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 2 disjuncts [2020-12-09 09:25:59,448 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 2 disjuncts [2020-12-09 09:25:59,451 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 6 disjuncts [2020-12-09 09:25:59,458 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-12-09 09:25:59,458 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:24, output treesize:63 [2020-12-09 09:25:59,466 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 2 disjuncts [2020-12-09 09:25:59,469 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 2 disjuncts [2020-12-09 09:25:59,471 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 2 disjuncts [2020-12-09 09:25:59,473 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 2 disjuncts [2020-12-09 09:25:59,474 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 2 disjuncts [2020-12-09 09:25:59,476 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 6 disjuncts [2020-12-09 09:25:59,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:25:59,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 09:25:59,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527872214] [2020-12-09 09:25:59,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:25:59,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 09:25:59,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717090839] [2020-12-09 09:25:59,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:25:59,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:25:59,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:25:59,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:25:59,523 INFO L87 Difference]: Start difference. First operand 165 states. Second operand 3 states. [2020-12-09 09:25:59,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:25:59,754 INFO L93 Difference]: Finished difference Result 177 states and 198 transitions. [2020-12-09 09:25:59,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:25:59,756 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 09:25:59,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:25:59,766 INFO L225 Difference]: With dead ends: 177 [2020-12-09 09:25:59,766 INFO L226 Difference]: Without dead ends: 173 [2020-12-09 09:25:59,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:25:59,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-12-09 09:25:59,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 166. [2020-12-09 09:25:59,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-12-09 09:25:59,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 190 transitions. [2020-12-09 09:25:59,802 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 190 transitions. Word has length 4 [2020-12-09 09:25:59,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:25:59,802 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 190 transitions. [2020-12-09 09:25:59,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:25:59,802 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 190 transitions. [2020-12-09 09:25:59,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 09:25:59,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:25:59,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 09:26:00,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 09:26:00,006 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:26:00,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:26:00,009 INFO L82 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2020-12-09 09:26:00,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:26:00,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1365982148] [2020-12-09 09:26:00,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 09:26:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:26:00,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 09:26:00,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:26:00,417 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2020-12-09 09:26:00,418 INFO L348 Elim1Store]: treesize reduction 190, result has 33.6 percent of original size [2020-12-09 09:26:00,418 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 101 [2020-12-09 09:26:00,425 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 09:26:00,517 INFO L625 ElimStorePlain]: treesize reduction 50, result has 53.7 percent of original size [2020-12-09 09:26:00,523 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 09:26:00,524 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:25, output treesize:11 [2020-12-09 09:26:00,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:26:00,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 09:26:00,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1365982148] [2020-12-09 09:26:00,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:26:00,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 09:26:00,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194763044] [2020-12-09 09:26:00,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 09:26:00,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:26:00,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 09:26:00,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:26:00,545 INFO L87 Difference]: Start difference. First operand 166 states and 190 transitions. Second operand 4 states. [2020-12-09 09:26:00,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:26:00,863 INFO L93 Difference]: Finished difference Result 376 states and 420 transitions. [2020-12-09 09:26:00,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 09:26:00,864 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-09 09:26:00,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:26:00,867 INFO L225 Difference]: With dead ends: 376 [2020-12-09 09:26:00,867 INFO L226 Difference]: Without dead ends: 376 [2020-12-09 09:26:00,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:26:00,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-12-09 09:26:00,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 229. [2020-12-09 09:26:00,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-12-09 09:26:00,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 294 transitions. [2020-12-09 09:26:00,882 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 294 transitions. Word has length 4 [2020-12-09 09:26:00,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:26:00,882 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 294 transitions. [2020-12-09 09:26:00,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 09:26:00,882 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 294 transitions. [2020-12-09 09:26:00,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 09:26:00,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:26:00,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 09:26:01,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 09:26:01,085 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:26:01,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:26:01,088 INFO L82 PathProgramCache]: Analyzing trace with hash 28698698, now seen corresponding path program 1 times [2020-12-09 09:26:01,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:26:01,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693061641] [2020-12-09 09:26:01,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 09:26:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:26:01,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-09 09:26:01,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:26:01,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:26:01,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:26:01,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:26:01,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:26:01,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:26:01,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:26:01,441 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 47 [2020-12-09 09:26:01,441 INFO L348 Elim1Store]: treesize reduction 322, result has 20.7 percent of original size [2020-12-09 09:26:01,442 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 11 case distinctions, treesize of input 190 treesize of output 242 [2020-12-09 09:26:01,452 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-12-09 09:26:01,452 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:01,454 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 4, 2, 3, 1] term [2020-12-09 09:26:01,454 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:01,462 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 09:26:01,605 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2020-12-09 09:26:01,606 INFO L625 ElimStorePlain]: treesize reduction 99, result has 57.1 percent of original size [2020-12-09 09:26:01,660 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:26:01,660 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 65 [2020-12-09 09:26:01,662 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 09:26:01,782 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-12-09 09:26:01,783 INFO L625 ElimStorePlain]: treesize reduction 24, result has 83.3 percent of original size [2020-12-09 09:26:01,799 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 4 disjuncts [2020-12-09 09:26:01,803 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 5 disjuncts [2020-12-09 09:26:01,807 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 5 disjuncts [2020-12-09 09:26:01,811 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 6 disjuncts [2020-12-09 09:26:01,814 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 13 disjuncts [2020-12-09 09:26:01,852 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-09 09:26:01,852 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:122, output treesize:122 [2020-12-09 09:26:01,857 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 4 disjuncts [2020-12-09 09:26:01,858 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 5 disjuncts [2020-12-09 09:26:01,860 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 5 disjuncts [2020-12-09 09:26:01,861 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 6 disjuncts [2020-12-09 09:26:01,862 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 13 disjuncts [2020-12-09 09:26:01,922 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 4 disjuncts [2020-12-09 09:26:01,924 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 5 disjuncts [2020-12-09 09:26:01,926 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 5 disjuncts [2020-12-09 09:26:01,927 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 6 disjuncts [2020-12-09 09:26:01,929 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 13 disjuncts [2020-12-09 09:26:02,141 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 51 [2020-12-09 09:26:02,199 INFO L382 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 51 treesize of output 27 [2020-12-09 09:26:02,200 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 09:26:02,252 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:26:02,258 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-12-09 09:26:02,259 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:98, output treesize:69 [2020-12-09 09:26:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:26:02,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 09:26:02,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693061641] [2020-12-09 09:26:02,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:26:02,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 09:26:02,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964143856] [2020-12-09 09:26:02,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 09:26:02,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:26:02,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 09:26:02,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 09:26:02,318 INFO L87 Difference]: Start difference. First operand 229 states and 294 transitions. Second operand 5 states. [2020-12-09 09:26:04,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:26:04,037 INFO L93 Difference]: Finished difference Result 486 states and 611 transitions. [2020-12-09 09:26:04,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 09:26:04,038 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-12-09 09:26:04,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:26:04,040 INFO L225 Difference]: With dead ends: 486 [2020-12-09 09:26:04,040 INFO L226 Difference]: Without dead ends: 486 [2020-12-09 09:26:04,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-09 09:26:04,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2020-12-09 09:26:04,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 278. [2020-12-09 09:26:04,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-12-09 09:26:04,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 373 transitions. [2020-12-09 09:26:04,053 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 373 transitions. Word has length 5 [2020-12-09 09:26:04,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:26:04,053 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 373 transitions. [2020-12-09 09:26:04,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 09:26:04,054 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 373 transitions. [2020-12-09 09:26:04,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 09:26:04,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:26:04,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 09:26:04,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 09:26:04,256 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:26:04,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:26:04,257 INFO L82 PathProgramCache]: Analyzing trace with hash 889659685, now seen corresponding path program 1 times [2020-12-09 09:26:04,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:26:04,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515510020] [2020-12-09 09:26:04,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-09 09:26:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:26:04,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-09 09:26:04,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:26:04,375 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_45|], 12=[|v_#valid_86|]} [2020-12-09 09:26:04,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:26:04,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:26:04,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:26:04,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:26:04,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:26:04,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:26:04,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:26:04,624 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-12-09 09:26:04,625 INFO L348 Elim1Store]: treesize reduction 48, result has 70.0 percent of original size [2020-12-09 09:26:04,625 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 117 [2020-12-09 09:26:04,628 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 09:26:04,838 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-12-09 09:26:04,838 INFO L625 ElimStorePlain]: treesize reduction 60, result has 71.6 percent of original size [2020-12-09 09:26:04,878 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:26:04,879 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 234 treesize of output 244 [2020-12-09 09:26:04,881 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-12-09 09:26:04,882 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:04,883 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 4, 2, 3, 1] term [2020-12-09 09:26:04,883 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:04,885 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 09:26:05,084 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-12-09 09:26:05,084 INFO L625 ElimStorePlain]: treesize reduction 105, result has 55.9 percent of original size [2020-12-09 09:26:05,099 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 09:26:05,105 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:26:05,105 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 21 [2020-12-09 09:26:05,106 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2020-12-09 09:26:05,259 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-12-09 09:26:05,260 INFO L625 ElimStorePlain]: treesize reduction 6, result has 95.0 percent of original size [2020-12-09 09:26:05,262 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,263 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,264 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,265 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-09 09:26:05,266 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,267 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,267 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 09:26:05,268 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,269 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 09:26:05,271 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,272 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,273 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-09 09:26:05,274 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,275 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 09:26:05,277 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,279 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-09 09:26:05,283 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:05,283 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-09 09:26:05,284 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 7 variables, input treesize:116, output treesize:117 [2020-12-09 09:26:05,286 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,286 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,287 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,287 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-09 09:26:05,288 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,289 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,289 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 09:26:05,290 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,290 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 09:26:05,292 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,293 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,293 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-09 09:26:05,294 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,295 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 09:26:05,296 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,297 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-09 09:26:05,300 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:05,380 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,381 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,382 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,383 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-09 09:26:05,384 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,385 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,386 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 09:26:05,386 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,387 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 09:26:05,389 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,390 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,391 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-09 09:26:05,392 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,393 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 09:26:05,395 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:05,396 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-09 09:26:05,585 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-12-09 09:26:05,624 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:05,630 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:05,636 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 6, 1] term [2020-12-09 09:26:05,636 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:05,661 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-09 09:26:05,662 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 09:26:05,818 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-12-09 09:26:05,819 INFO L625 ElimStorePlain]: treesize reduction 32, result has 79.1 percent of original size [2020-12-09 09:26:05,830 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-09 09:26:05,831 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 09:26:05,907 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:26:05,913 INFO L382 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 33 treesize of output 17 [2020-12-09 09:26:05,915 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-09 09:26:05,980 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:26:05,993 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-09 09:26:05,994 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-12-09 09:26:06,050 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:26:06,054 INFO L547 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 4 dim-2 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2020-12-09 09:26:06,054 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 11 variables, input treesize:164, output treesize:79 [2020-12-09 09:26:06,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:26:06,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 09:26:06,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515510020] [2020-12-09 09:26:06,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:26:06,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 09:26:06,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998590334] [2020-12-09 09:26:06,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 09:26:06,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:26:06,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 09:26:06,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 09:26:06,139 INFO L87 Difference]: Start difference. First operand 278 states and 373 transitions. Second operand 5 states. [2020-12-09 09:26:06,408 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2020-12-09 09:26:07,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:26:07,309 INFO L93 Difference]: Finished difference Result 424 states and 499 transitions. [2020-12-09 09:26:07,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 09:26:07,310 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-12-09 09:26:07,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:26:07,312 INFO L225 Difference]: With dead ends: 424 [2020-12-09 09:26:07,312 INFO L226 Difference]: Without dead ends: 424 [2020-12-09 09:26:07,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 09:26:07,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-12-09 09:26:07,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 278. [2020-12-09 09:26:07,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-12-09 09:26:07,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 369 transitions. [2020-12-09 09:26:07,320 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 369 transitions. Word has length 6 [2020-12-09 09:26:07,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:26:07,320 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 369 transitions. [2020-12-09 09:26:07,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 09:26:07,320 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 369 transitions. [2020-12-09 09:26:07,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 09:26:07,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:26:07,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:26:07,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-09 09:26:07,523 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:26:07,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:26:07,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1809646508, now seen corresponding path program 1 times [2020-12-09 09:26:07,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:26:07,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378983128] [2020-12-09 09:26:07,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-09 09:26:07,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:26:07,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 09:26:07,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:26:07,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:26:07,819 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 33 [2020-12-09 09:26:07,819 INFO L348 Elim1Store]: treesize reduction 336, result has 15.2 percent of original size [2020-12-09 09:26:07,820 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 100 treesize of output 136 [2020-12-09 09:26:07,824 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 09:26:07,920 INFO L625 ElimStorePlain]: treesize reduction 26, result has 77.4 percent of original size [2020-12-09 09:26:07,930 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:26:07,931 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2020-12-09 09:26:07,932 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2020-12-09 09:26:08,005 INFO L625 ElimStorePlain]: treesize reduction 6, result has 92.8 percent of original size [2020-12-09 09:26:08,007 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 2 disjuncts [2020-12-09 09:26:08,008 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 3 disjuncts [2020-12-09 09:26:08,009 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 3 disjuncts [2020-12-09 09:26:08,009 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 3 disjuncts [2020-12-09 09:26:08,010 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 5 disjuncts [2020-12-09 09:26:08,011 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 10 disjuncts [2020-12-09 09:26:08,017 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-12-09 09:26:08,017 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:58, output treesize:79 [2020-12-09 09:26:08,018 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 2 disjuncts [2020-12-09 09:26:08,019 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 3 disjuncts [2020-12-09 09:26:08,020 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 3 disjuncts [2020-12-09 09:26:08,020 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 3 disjuncts [2020-12-09 09:26:08,021 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 5 disjuncts [2020-12-09 09:26:08,022 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 10 disjuncts [2020-12-09 09:26:08,051 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 2 disjuncts [2020-12-09 09:26:08,052 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 3 disjuncts [2020-12-09 09:26:08,053 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 3 disjuncts [2020-12-09 09:26:08,054 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 3 disjuncts [2020-12-09 09:26:08,055 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 5 disjuncts [2020-12-09 09:26:08,055 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 10 disjuncts [2020-12-09 09:26:08,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:26:08,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 09:26:08,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378983128] [2020-12-09 09:26:08,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:26:08,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 09:26:08,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690602821] [2020-12-09 09:26:08,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 09:26:08,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:26:08,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 09:26:08,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:26:08,215 INFO L87 Difference]: Start difference. First operand 278 states and 369 transitions. Second operand 4 states. [2020-12-09 09:26:08,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:26:08,783 INFO L93 Difference]: Finished difference Result 371 states and 469 transitions. [2020-12-09 09:26:08,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 09:26:08,784 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 09:26:08,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:26:08,785 INFO L225 Difference]: With dead ends: 371 [2020-12-09 09:26:08,785 INFO L226 Difference]: Without dead ends: 371 [2020-12-09 09:26:08,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 09:26:08,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-12-09 09:26:08,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 297. [2020-12-09 09:26:08,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-12-09 09:26:08,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 401 transitions. [2020-12-09 09:26:08,794 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 401 transitions. Word has length 7 [2020-12-09 09:26:08,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:26:08,794 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 401 transitions. [2020-12-09 09:26:08,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 09:26:08,794 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 401 transitions. [2020-12-09 09:26:08,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 09:26:08,794 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:26:08,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:26:08,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-09 09:26:08,996 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:26:08,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:26:08,997 INFO L82 PathProgramCache]: Analyzing trace with hash 264466951, now seen corresponding path program 1 times [2020-12-09 09:26:08,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:26:08,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680610009] [2020-12-09 09:26:08,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-09 09:26:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:26:09,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 09:26:09,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:26:09,123 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_46|], 4=[|v_#valid_88|]} [2020-12-09 09:26:09,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:26:09,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:26:09,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:26:09,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:26:09,376 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2020-12-09 09:26:09,376 INFO L348 Elim1Store]: treesize reduction 108, result has 47.1 percent of original size [2020-12-09 09:26:09,376 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 101 [2020-12-09 09:26:09,378 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 09:26:09,502 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2020-12-09 09:26:09,503 INFO L625 ElimStorePlain]: treesize reduction 50, result has 65.0 percent of original size [2020-12-09 09:26:09,513 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2020-12-09 09:26:09,515 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2020-12-09 09:26:09,641 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-12-09 09:26:09,642 INFO L625 ElimStorePlain]: treesize reduction 22, result has 80.0 percent of original size [2020-12-09 09:26:09,649 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 09:26:09,654 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:26:09,654 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 17 [2020-12-09 09:26:09,655 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2020-12-09 09:26:09,776 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-12-09 09:26:09,776 INFO L625 ElimStorePlain]: treesize reduction 6, result has 92.5 percent of original size [2020-12-09 09:26:09,778 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 09:26:09,778 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 09:26:09,779 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,779 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,779 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,780 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,781 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,782 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,782 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,783 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2020-12-09 09:26:09,784 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 09:26:09,784 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,784 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,785 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,785 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,786 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,786 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,787 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-09 09:26:09,788 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,788 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,789 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,789 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,790 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,790 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,791 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 09:26:09,792 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,792 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,793 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,794 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,794 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 09:26:09,795 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,796 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,797 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 09:26:09,801 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,802 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,802 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 09:26:09,804 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,805 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,805 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,806 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,806 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 09:26:09,807 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,808 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,808 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,809 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,810 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,810 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 09:26:09,813 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,813 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,814 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,814 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 09:26:09,815 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,815 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,818 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 09:26:09,819 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,820 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 09:26:09,822 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,822 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,824 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,824 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,825 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,825 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,826 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,826 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,828 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 09:26:09,829 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 09:26:09,829 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,830 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,830 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,831 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,831 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,832 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-09 09:26:09,833 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 09:26:09,833 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,834 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,834 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,835 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,836 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,836 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-09 09:26:09,837 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,838 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,838 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 09:26:09,839 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,839 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 09:26:09,840 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,841 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,841 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 09:26:09,843 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,844 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,844 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 09:26:09,846 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,847 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,847 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,848 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,849 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-09 09:26:09,850 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,850 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,851 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 09:26:09,853 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,854 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,855 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-09 09:26:09,858 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-12-09 09:26:09,858 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 8 variables, input treesize:60, output treesize:74 [2020-12-09 09:26:09,860 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 09:26:09,861 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 09:26:09,861 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,862 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,862 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,863 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,864 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,864 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,865 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,866 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2020-12-09 09:26:09,867 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 09:26:09,867 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,868 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,868 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,869 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,869 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,871 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,871 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-09 09:26:09,872 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,872 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,873 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,873 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,873 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,874 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,874 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 09:26:09,875 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,876 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,876 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,877 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,877 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 09:26:09,878 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,879 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,879 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 09:26:09,882 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,882 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,883 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 09:26:09,885 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,886 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,887 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,887 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,888 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 09:26:09,889 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,889 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,890 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,891 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,892 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,893 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 09:26:09,895 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,896 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,896 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,897 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 09:26:09,898 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,898 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,899 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 09:26:09,900 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,900 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 09:26:09,902 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,903 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,904 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,905 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,905 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,906 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,906 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,907 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,909 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 09:26:09,910 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 09:26:09,910 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,911 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,912 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,912 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,913 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,913 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-09 09:26:09,914 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 09:26:09,915 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,915 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,916 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,917 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,917 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,918 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-09 09:26:09,919 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,920 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,921 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 09:26:09,921 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,922 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 09:26:09,923 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,924 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,924 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 09:26:09,925 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,925 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,926 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 09:26:09,929 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,930 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,930 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,931 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,931 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-09 09:26:09,932 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,932 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,933 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 09:26:09,934 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,935 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,935 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-09 09:26:09,957 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 09:26:09,957 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 09:26:09,957 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,958 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,958 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,959 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,959 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,960 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,960 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,961 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2020-12-09 09:26:09,961 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 09:26:09,962 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,962 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,962 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,963 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,963 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,964 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,964 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-09 09:26:09,965 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 09:26:09,966 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,966 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,967 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,967 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,968 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 09:26:09,968 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,968 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,969 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,970 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 09:26:09,970 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,971 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,972 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,972 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,973 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 09:26:09,974 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,975 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,975 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,976 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 09:26:09,976 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,977 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,977 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,978 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,979 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,979 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,979 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,980 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,981 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,981 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-09 09:26:09,982 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,982 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,983 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,983 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-09 09:26:09,987 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,988 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 09:26:09,989 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:09,990 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,991 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 09:26:09,995 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,995 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,996 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,996 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 09:26:09,997 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,997 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,999 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:09,999 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:09,999 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 09:26:10,002 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 09:26:10,002 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 09:26:10,002 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:10,003 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:10,004 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:10,004 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:10,005 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:10,005 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-09 09:26:10,006 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 09:26:10,006 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:10,007 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:10,007 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:10,008 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:10,008 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:10,009 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-09 09:26:10,009 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:10,010 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:10,010 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:10,011 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:10,011 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-09 09:26:10,012 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:10,013 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:10,014 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-09 09:26:10,017 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:10,018 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:10,018 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 09:26:10,020 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:10,021 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:10,021 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 09:26:10,021 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:10,022 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 09:26:10,023 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:10,023 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:10,024 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 09:26:10,025 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:10,025 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 09:26:10,026 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 09:26:10,241 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 35 [2020-12-09 09:26:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:26:10,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 09:26:10,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [680610009] [2020-12-09 09:26:10,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:26:10,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 09:26:10,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370742276] [2020-12-09 09:26:10,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 09:26:10,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:26:10,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 09:26:10,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:26:10,350 INFO L87 Difference]: Start difference. First operand 297 states and 401 transitions. Second operand 4 states. [2020-12-09 09:26:11,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:26:11,006 INFO L93 Difference]: Finished difference Result 367 states and 464 transitions. [2020-12-09 09:26:11,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 09:26:11,007 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-09 09:26:11,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:26:11,008 INFO L225 Difference]: With dead ends: 367 [2020-12-09 09:26:11,008 INFO L226 Difference]: Without dead ends: 367 [2020-12-09 09:26:11,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 5 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 09:26:11,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-12-09 09:26:11,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 296. [2020-12-09 09:26:11,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-12-09 09:26:11,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 399 transitions. [2020-12-09 09:26:11,014 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 399 transitions. Word has length 8 [2020-12-09 09:26:11,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:26:11,014 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 399 transitions. [2020-12-09 09:26:11,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 09:26:11,014 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 399 transitions. [2020-12-09 09:26:11,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 09:26:11,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:26:11,014 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:26:11,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-09 09:26:11,216 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:26:11,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:26:11,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1118504467, now seen corresponding path program 1 times [2020-12-09 09:26:11,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:26:11,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336789246] [2020-12-09 09:26:11,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-12-09 09:26:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:26:11,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 09:26:11,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:26:11,561 WARN L197 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2020-12-09 09:26:11,561 INFO L348 Elim1Store]: treesize reduction 190, result has 33.6 percent of original size [2020-12-09 09:26:11,562 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 101 [2020-12-09 09:26:11,563 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 09:26:11,649 INFO L625 ElimStorePlain]: treesize reduction 50, result has 53.7 percent of original size [2020-12-09 09:26:11,652 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 09:26:11,652 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:25, output treesize:11 [2020-12-09 09:26:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:26:11,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:26:11,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:26:11,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336789246] [2020-12-09 09:26:11,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [953088699] [2020-12-09 09:26:11,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt [2020-12-09 09:26:12,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:26:12,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 09:26:12,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:26:12,316 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2020-12-09 09:26:12,316 INFO L348 Elim1Store]: treesize reduction 190, result has 33.6 percent of original size [2020-12-09 09:26:12,316 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 101 [2020-12-09 09:26:12,318 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 09:26:12,425 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-12-09 09:26:12,426 INFO L625 ElimStorePlain]: treesize reduction 50, result has 53.7 percent of original size [2020-12-09 09:26:12,429 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 09:26:12,429 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:25, output treesize:11 [2020-12-09 09:26:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:26:12,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:26:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:26:12,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306156249] [2020-12-09 09:26:12,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:26:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:26:12,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 09:26:12,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:26:12,804 WARN L197 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2020-12-09 09:26:12,805 INFO L348 Elim1Store]: treesize reduction 190, result has 33.6 percent of original size [2020-12-09 09:26:12,805 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 101 [2020-12-09 09:26:12,807 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 09:26:12,903 INFO L625 ElimStorePlain]: treesize reduction 50, result has 53.7 percent of original size [2020-12-09 09:26:12,906 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 09:26:12,906 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:25, output treesize:11 [2020-12-09 09:26:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:26:12,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:26:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:26:13,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 09:26:13,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 4] total 8 [2020-12-09 09:26:13,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858207874] [2020-12-09 09:26:13,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 09:26:13,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:26:13,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 09:26:13,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-12-09 09:26:13,143 INFO L87 Difference]: Start difference. First operand 296 states and 399 transitions. Second operand 10 states. [2020-12-09 09:26:13,419 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2020-12-09 09:26:15,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:26:15,032 INFO L93 Difference]: Finished difference Result 808 states and 965 transitions. [2020-12-09 09:26:15,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 09:26:15,033 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2020-12-09 09:26:15,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:26:15,036 INFO L225 Difference]: With dead ends: 808 [2020-12-09 09:26:15,036 INFO L226 Difference]: Without dead ends: 808 [2020-12-09 09:26:15,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2020-12-09 09:26:15,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2020-12-09 09:26:15,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 411. [2020-12-09 09:26:15,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2020-12-09 09:26:15,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 581 transitions. [2020-12-09 09:26:15,044 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 581 transitions. Word has length 12 [2020-12-09 09:26:15,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:26:15,045 INFO L481 AbstractCegarLoop]: Abstraction has 411 states and 581 transitions. [2020-12-09 09:26:15,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 09:26:15,045 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 581 transitions. [2020-12-09 09:26:15,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 09:26:15,045 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:26:15,045 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:26:15,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt,8 mathsat -unsat_core_generation=3,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:26:15,648 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr45REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr51REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr30REQUIRES_VIOLATION, ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr44REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr50REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr31REQUIRES_VIOLATION, ULTIMATE.startErr52REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr53REQUIRES_VIOLATION, ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 09:26:15,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:26:15,649 INFO L82 PathProgramCache]: Analyzing trace with hash -313900157, now seen corresponding path program 1 times [2020-12-09 09:26:15,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:26:15,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [28317174] [2020-12-09 09:26:15,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2020-12-09 09:26:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:26:15,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 09:26:15,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:26:15,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:26:16,033 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 44 [2020-12-09 09:26:16,033 INFO L348 Elim1Store]: treesize reduction 429, result has 15.7 percent of original size [2020-12-09 09:26:16,033 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 179 treesize of output 229 [2020-12-09 09:26:16,035 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 1] term [2020-12-09 09:26:16,035 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:16,036 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 2, 1] term [2020-12-09 09:26:16,036 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:16,039 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 09:26:16,203 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2020-12-09 09:26:16,203 INFO L625 ElimStorePlain]: treesize reduction 90, result has 59.8 percent of original size [2020-12-09 09:26:16,222 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:26:16,223 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2020-12-09 09:26:16,223 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2020-12-09 09:26:16,345 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-12-09 09:26:16,346 INFO L625 ElimStorePlain]: treesize reduction 6, result has 95.3 percent of original size [2020-12-09 09:26:16,348 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 4 disjuncts [2020-12-09 09:26:16,349 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 4 disjuncts [2020-12-09 09:26:16,349 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 5 disjuncts [2020-12-09 09:26:16,350 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 6 disjuncts [2020-12-09 09:26:16,351 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 12 disjuncts [2020-12-09 09:26:16,364 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-09 09:26:16,365 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:102, output treesize:124 [2020-12-09 09:26:16,366 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 4 disjuncts [2020-12-09 09:26:16,367 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 4 disjuncts [2020-12-09 09:26:16,368 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 5 disjuncts [2020-12-09 09:26:16,368 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 6 disjuncts [2020-12-09 09:26:16,369 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 12 disjuncts [2020-12-09 09:26:16,409 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 4 disjuncts [2020-12-09 09:26:16,409 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 4 disjuncts [2020-12-09 09:26:16,410 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 5 disjuncts [2020-12-09 09:26:16,411 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 6 disjuncts [2020-12-09 09:26:16,412 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 12 disjuncts [2020-12-09 09:26:22,169 WARN L197 SmtUtils]: Spent 5.66 s on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2020-12-09 09:26:24,727 WARN L197 SmtUtils]: Spent 1.95 s on a formula simplification that was a NOOP. DAG size: 113 [2020-12-09 09:26:24,756 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 7, 1] term [2020-12-09 09:26:24,756 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-09 09:26:24,782 INFO L382 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 41 treesize of output 21 [2020-12-09 09:26:24,783 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 09:26:24,962 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-12-09 09:26:24,962 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:26:24,969 INFO L382 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 41 treesize of output 21 [2020-12-09 09:26:24,970 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 09:26:25,143 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-12-09 09:26:25,144 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:26:25,155 INFO L382 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 41 treesize of output 21 [2020-12-09 09:26:25,156 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-09 09:26:25,322 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-12-09 09:26:25,322 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:26:25,328 INFO L547 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 3 dim-2 vars, End of recursive call: 13 dim-0 vars, and 3 xjuncts. [2020-12-09 09:26:25,328 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 16 variables, input treesize:276, output treesize:209 [2020-12-09 09:26:25,488 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 32 [2020-12-09 09:26:25,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:26:25,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:26:25,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:26:25,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [28317174] [2020-12-09 09:26:25,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1537420887] [2020-12-09 09:26:25,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt [2020-12-09 09:26:25,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:26:25,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 09:26:25,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:26:26,260 WARN L197 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 53 [2020-12-09 09:26:26,261 INFO L348 Elim1Store]: treesize reduction 591, result has 15.0 percent of original size [2020-12-09 09:26:26,261 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 11 case distinctions, treesize of input 249 treesize of output 315 [2020-12-09 09:26:26,263 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 3, 1] term [2020-12-09 09:26:26,263 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:26,264 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 1] term [2020-12-09 09:26:26,264 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:26,265 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 7, 3, 3, 2, 3, 1] term [2020-12-09 09:26:26,265 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:26,265 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 3, 3, 2, 3, 1] term [2020-12-09 09:26:26,266 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:26,267 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 8, 4, 3, 3, 3, 3, 3, 2, 2, 1] term [2020-12-09 09:26:26,267 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:26,268 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 4, 5, 3, 3, 3, 3, 2, 2, 1] term [2020-12-09 09:26:26,268 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:26,269 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 5, 3, 3, 2, 3, 1] term [2020-12-09 09:26:26,269 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:26:26,269 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 3, 3, 2, 3, 1] term [2020-12-09 09:26:26,270 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:26,270 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 1] term [2020-12-09 09:26:26,270 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 09:26:26,278 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 09:26:26,477 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 63 [2020-12-09 09:26:26,478 INFO L625 ElimStorePlain]: treesize reduction 315, result has 32.8 percent of original size [2020-12-09 09:26:26,480 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 3 disjuncts [2020-12-09 09:26:26,480 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 6 disjuncts [2020-12-09 09:26:26,481 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 6 disjuncts [2020-12-09 09:26:26,482 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 12 disjuncts [2020-12-09 09:26:26,485 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-09 09:26:26,485 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:122, output treesize:156 [2020-12-09 09:26:26,487 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 3 disjuncts [2020-12-09 09:26:26,487 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 6 disjuncts [2020-12-09 09:26:26,488 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 6 disjuncts [2020-12-09 09:26:26,488 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 12 disjuncts [2020-12-09 09:26:26,588 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 3 disjuncts [2020-12-09 09:26:26,589 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 6 disjuncts [2020-12-09 09:26:26,590 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 6 disjuncts [2020-12-09 09:26:26,591 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 12 disjuncts [2020-12-09 09:26:31,180 WARN L197 SmtUtils]: Spent 4.46 s on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-12-09 09:26:32,216 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-12-09 09:26:32,240 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 9, 1] term [2020-12-09 09:26:32,240 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-09 09:26:32,250 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-09 09:26:32,276 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 40 [2020-12-09 09:26:32,278 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 09:26:32,450 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-12-09 09:26:32,451 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:26:32,458 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 40 [2020-12-09 09:26:32,460 INFO L547 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 09:26:32,652 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-12-09 09:26:32,652 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:26:32,660 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 40 [2020-12-09 09:26:32,662 INFO L547 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 09:26:32,815 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-12-09 09:26:32,815 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:26:32,821 INFO L547 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-2 vars, End of recursive call: 11 dim-0 vars, and 3 xjuncts. [2020-12-09 09:26:32,822 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 10 variables, input treesize:340, output treesize:219 [2020-12-09 09:26:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:26:32,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:26:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:26:33,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207211995] [2020-12-09 09:26:33,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_abb9a050-0369-4ead-97fa-becfd12911b4/bin/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:26:33,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 09:26:33,186 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 09:26:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 09:26:33,221 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 09:26:33,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 mathsat -unsat_core_generation=3,12 cvc4 --incremental --print-success --lang smt [2020-12-09 09:26:33,860 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: Tracecheck IpTcStrategyModuleMathsat [28317174] said UNSAT, interpolant generator IpTcStrategyModuleZ3 [1207211995] failed with TRACE_FEASIBLE at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:326) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 09:26:33,868 INFO L168 Benchmark]: Toolchain (without parser) took 36146.65 ms. Allocated memory was 56.6 MB in the beginning and 83.9 MB in the end (delta: 27.3 MB). Free memory was 34.2 MB in the beginning and 21.1 MB in the end (delta: 13.1 MB). Peak memory consumption was 38.9 MB. Max. memory is 16.1 GB. [2020-12-09 09:26:33,869 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 56.6 MB. Free memory is still 38.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:26:33,869 INFO L168 Benchmark]: CACSL2BoogieTranslator took 387.64 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 34.0 MB in the beginning and 50.1 MB in the end (delta: -16.1 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. [2020-12-09 09:26:33,869 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.76 ms. Allocated memory is still 69.2 MB. Free memory was 50.1 MB in the beginning and 47.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 09:26:33,870 INFO L168 Benchmark]: Boogie Preprocessor took 30.83 ms. Allocated memory is still 69.2 MB. Free memory was 47.3 MB in the beginning and 45.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:26:33,870 INFO L168 Benchmark]: RCFGBuilder took 716.32 ms. Allocated memory is still 69.2 MB. Free memory was 44.9 MB in the beginning and 42.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.1 GB. [2020-12-09 09:26:33,870 INFO L168 Benchmark]: TraceAbstraction took 34962.30 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 42.1 MB in the beginning and 21.1 MB in the end (delta: 21.0 MB). Peak memory consumption was 36.0 MB. Max. memory is 16.1 GB. [2020-12-09 09:26:33,872 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 56.6 MB. Free memory is still 38.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 387.64 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 34.0 MB in the beginning and 50.1 MB in the end (delta: -16.1 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.76 ms. Allocated memory is still 69.2 MB. Free memory was 50.1 MB in the beginning and 47.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.83 ms. Allocated memory is still 69.2 MB. Free memory was 47.3 MB in the beginning and 45.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 716.32 ms. Allocated memory is still 69.2 MB. Free memory was 44.9 MB in the beginning and 42.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 34962.30 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 42.1 MB in the beginning and 21.1 MB in the end (delta: 21.0 MB). Peak memory consumption was 36.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: Tracecheck IpTcStrategyModuleMathsat [28317174] said UNSAT, interpolant generator IpTcStrategyModuleZ3 [1207211995] failed with TRACE_FEASIBLE de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: Tracecheck IpTcStrategyModuleMathsat [28317174] said UNSAT, interpolant generator IpTcStrategyModuleZ3 [1207211995] failed with TRACE_FEASIBLE: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:326) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...