./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c -s /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6995ed6ba91d7bb4325b7b2cb6cc1ca7ba7d3a61 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c -s /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6995ed6ba91d7bb4325b7b2cb6cc1ca7ba7d3a61 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:40:09,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:40:09,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:40:09,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:40:09,692 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:40:09,698 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:40:09,699 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:40:09,702 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:40:09,704 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:40:09,706 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:40:09,707 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:40:09,709 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:40:09,709 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:40:09,710 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:40:09,712 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:40:09,713 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:40:09,715 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:40:09,716 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:40:09,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:40:09,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:40:09,723 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:40:09,724 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:40:09,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:40:09,727 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:40:09,730 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:40:09,731 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:40:09,731 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:40:09,732 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:40:09,733 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:40:09,734 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:40:09,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:40:09,736 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:40:09,737 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:40:09,738 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:40:09,739 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:40:09,740 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:40:09,741 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:40:09,741 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:40:09,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:40:09,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:40:09,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:40:09,744 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:40:09,774 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:40:09,774 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:40:09,775 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:40:09,775 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:40:09,776 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:40:09,776 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:40:09,776 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:40:09,776 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:40:09,777 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:40:09,777 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:40:09,777 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:40:09,777 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:40:09,777 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:40:09,778 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:40:09,778 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:40:09,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:40:09,779 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:40:09,779 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:40:09,779 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:40:09,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:40:09,780 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:40:09,780 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:40:09,780 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:40:09,780 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:40:09,781 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:40:09,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:40:09,781 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:40:09,781 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:40:09,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:40:09,782 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:40:09,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:40:09,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:40:09,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:40:09,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:40:09,783 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:40:09,783 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:40:09,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:40:09,784 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:40:09,784 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:40:09,784 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:40:09,784 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_29f475f6-d961-4750-835c-8c7312498a03/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6995ed6ba91d7bb4325b7b2cb6cc1ca7ba7d3a61 [2020-11-28 07:40:10,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:40:10,046 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:40:10,048 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:40:10,049 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:40:10,051 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:40:10,052 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan/../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c [2020-11-28 07:40:10,136 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan/data/b2b9cad72/907fe112a6304c9b83049cfe8f5180a8/FLAGd76d6ae0d [2020-11-28 07:40:10,597 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:40:10,598 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c [2020-11-28 07:40:10,611 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan/data/b2b9cad72/907fe112a6304c9b83049cfe8f5180a8/FLAGd76d6ae0d [2020-11-28 07:40:10,951 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan/data/b2b9cad72/907fe112a6304c9b83049cfe8f5180a8 [2020-11-28 07:40:10,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:40:10,955 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:40:10,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:40:10,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:40:10,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:40:10,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:40:10" (1/1) ... [2020-11-28 07:40:10,983 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71ea7482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:10, skipping insertion in model container [2020-11-28 07:40:10,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:40:10" (1/1) ... [2020-11-28 07:40:10,990 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:40:11,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:40:11,343 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:40:11,354 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:40:11,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:40:11,432 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:40:11,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:11 WrapperNode [2020-11-28 07:40:11,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:40:11,437 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:40:11,437 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:40:11,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:40:11,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:11" (1/1) ... [2020-11-28 07:40:11,455 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:11" (1/1) ... [2020-11-28 07:40:11,498 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:40:11,498 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:40:11,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:40:11,499 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:40:11,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:11" (1/1) ... [2020-11-28 07:40:11,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:11" (1/1) ... [2020-11-28 07:40:11,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:11" (1/1) ... [2020-11-28 07:40:11,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:11" (1/1) ... [2020-11-28 07:40:11,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:11" (1/1) ... [2020-11-28 07:40:11,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:11" (1/1) ... [2020-11-28 07:40:11,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:11" (1/1) ... [2020-11-28 07:40:11,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:40:11,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:40:11,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:40:11,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:40:11,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/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 [2020-11-28 07:40:11,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:40:11,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:40:11,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:40:11,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:40:11,758 WARN L798 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-11-28 07:40:12,385 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2020-11-28 07:40:12,386 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2020-11-28 07:40:12,896 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:40:12,897 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 07:40:12,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:40:12 BoogieIcfgContainer [2020-11-28 07:40:12,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:40:12,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:40:12,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:40:12,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:40:12,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:40:10" (1/3) ... [2020-11-28 07:40:12,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54d1f883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:40:12, skipping insertion in model container [2020-11-28 07:40:12,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:11" (2/3) ... [2020-11-28 07:40:12,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54d1f883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:40:12, skipping insertion in model container [2020-11-28 07:40:12,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:40:12" (3/3) ... [2020-11-28 07:40:12,911 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_2.BV.c.cil-2a.c [2020-11-28 07:40:12,924 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:40:12,929 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:40:12,941 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:40:12,981 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:40:12,981 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:40:12,981 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:40:12,981 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:40:12,981 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:40:12,981 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:40:12,981 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:40:12,982 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:40:12,999 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2020-11-28 07:40:13,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-28 07:40:13,006 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:13,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:40:13,007 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:13,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:13,013 INFO L82 PathProgramCache]: Analyzing trace with hash 120765708, now seen corresponding path program 1 times [2020-11-28 07:40:13,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:40:13,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335718138] [2020-11-28 07:40:13,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:40:13,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:40:13,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335718138] [2020-11-28 07:40:13,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:13,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:40:13,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136313768] [2020-11-28 07:40:13,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:40:13,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:40:13,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:40:13,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:40:13,235 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 3 states. [2020-11-28 07:40:13,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:13,439 INFO L93 Difference]: Finished difference Result 169 states and 293 transitions. [2020-11-28 07:40:13,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:40:13,440 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-11-28 07:40:13,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:13,451 INFO L225 Difference]: With dead ends: 169 [2020-11-28 07:40:13,451 INFO L226 Difference]: Without dead ends: 83 [2020-11-28 07:40:13,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:40:13,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-28 07:40:13,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-11-28 07:40:13,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-28 07:40:13,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 120 transitions. [2020-11-28 07:40:13,521 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 120 transitions. Word has length 19 [2020-11-28 07:40:13,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:13,522 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 120 transitions. [2020-11-28 07:40:13,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:40:13,522 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 120 transitions. [2020-11-28 07:40:13,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-28 07:40:13,524 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:13,524 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, 1] [2020-11-28 07:40:13,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:40:13,524 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:13,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:13,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1696403755, now seen corresponding path program 1 times [2020-11-28 07:40:13,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:40:13,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40166640] [2020-11-28 07:40:13,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:40:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:13,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:40:13,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40166640] [2020-11-28 07:40:13,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:13,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:40:13,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353345404] [2020-11-28 07:40:13,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:40:13,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:40:13,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:40:13,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:40:13,662 INFO L87 Difference]: Start difference. First operand 83 states and 120 transitions. Second operand 3 states. [2020-11-28 07:40:13,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:13,868 INFO L93 Difference]: Finished difference Result 178 states and 261 transitions. [2020-11-28 07:40:13,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:40:13,869 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-11-28 07:40:13,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:13,871 INFO L225 Difference]: With dead ends: 178 [2020-11-28 07:40:13,871 INFO L226 Difference]: Without dead ends: 98 [2020-11-28 07:40:13,872 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 [2020-11-28 07:40:13,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-28 07:40:13,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2020-11-28 07:40:13,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-11-28 07:40:13,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 136 transitions. [2020-11-28 07:40:13,886 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 136 transitions. Word has length 28 [2020-11-28 07:40:13,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:13,886 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 136 transitions. [2020-11-28 07:40:13,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:40:13,887 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 136 transitions. [2020-11-28 07:40:13,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-28 07:40:13,889 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:13,889 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-11-28 07:40:13,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:40:13,890 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:13,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:13,891 INFO L82 PathProgramCache]: Analyzing trace with hash 2016471423, now seen corresponding path program 1 times [2020-11-28 07:40:13,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:40:13,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656494441] [2020-11-28 07:40:13,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:40:13,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 07:40:14,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656494441] [2020-11-28 07:40:14,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:14,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:40:14,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153073047] [2020-11-28 07:40:14,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:40:14,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:40:14,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:40:14,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:40:14,006 INFO L87 Difference]: Start difference. First operand 96 states and 136 transitions. Second operand 3 states. [2020-11-28 07:40:14,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:14,217 INFO L93 Difference]: Finished difference Result 206 states and 297 transitions. [2020-11-28 07:40:14,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:40:14,218 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-11-28 07:40:14,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:14,220 INFO L225 Difference]: With dead ends: 206 [2020-11-28 07:40:14,220 INFO L226 Difference]: Without dead ends: 113 [2020-11-28 07:40:14,221 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 [2020-11-28 07:40:14,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-11-28 07:40:14,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2020-11-28 07:40:14,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-11-28 07:40:14,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 154 transitions. [2020-11-28 07:40:14,231 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 154 transitions. Word has length 39 [2020-11-28 07:40:14,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:14,234 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 154 transitions. [2020-11-28 07:40:14,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:40:14,235 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 154 transitions. [2020-11-28 07:40:14,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-28 07:40:14,236 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:14,237 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 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] [2020-11-28 07:40:14,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:40:14,237 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:14,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:14,238 INFO L82 PathProgramCache]: Analyzing trace with hash -2018116219, now seen corresponding path program 1 times [2020-11-28 07:40:14,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:40:14,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668387727] [2020-11-28 07:40:14,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:40:14,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:14,398 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 07:40:14,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668387727] [2020-11-28 07:40:14,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792727508] [2020-11-28 07:40:14,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/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 [2020-11-28 07:40:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:14,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 07:40:14,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:40:14,756 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2020-11-28 07:40:14,796 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-11-28 07:40:14,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:40:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-11-28 07:40:14,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:40:14,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 9 [2020-11-28 07:40:14,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306836909] [2020-11-28 07:40:14,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:40:14,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:40:14,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:40:14,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-28 07:40:14,860 INFO L87 Difference]: Start difference. First operand 111 states and 154 transitions. Second operand 6 states. [2020-11-28 07:40:15,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:15,343 INFO L93 Difference]: Finished difference Result 312 states and 467 transitions. [2020-11-28 07:40:15,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:40:15,344 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-11-28 07:40:15,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:15,346 INFO L225 Difference]: With dead ends: 312 [2020-11-28 07:40:15,346 INFO L226 Difference]: Without dead ends: 203 [2020-11-28 07:40:15,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-28 07:40:15,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-11-28 07:40:15,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 186. [2020-11-28 07:40:15,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-11-28 07:40:15,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 255 transitions. [2020-11-28 07:40:15,366 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 255 transitions. Word has length 52 [2020-11-28 07:40:15,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:15,366 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 255 transitions. [2020-11-28 07:40:15,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:40:15,366 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 255 transitions. [2020-11-28 07:40:15,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-28 07:40:15,369 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:15,369 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2020-11-28 07:40:15,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:40:15,600 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:15,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:15,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1375532096, now seen corresponding path program 1 times [2020-11-28 07:40:15,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:40:15,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025153754] [2020-11-28 07:40:15,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:40:15,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:15,691 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-11-28 07:40:15,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025153754] [2020-11-28 07:40:15,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:15,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:40:15,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529303534] [2020-11-28 07:40:15,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:40:15,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:40:15,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:40:15,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:40:15,693 INFO L87 Difference]: Start difference. First operand 186 states and 255 transitions. Second operand 3 states. [2020-11-28 07:40:15,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:15,892 INFO L93 Difference]: Finished difference Result 390 states and 543 transitions. [2020-11-28 07:40:15,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:40:15,892 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-11-28 07:40:15,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:15,894 INFO L225 Difference]: With dead ends: 390 [2020-11-28 07:40:15,894 INFO L226 Difference]: Without dead ends: 207 [2020-11-28 07:40:15,895 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 [2020-11-28 07:40:15,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-11-28 07:40:15,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2020-11-28 07:40:15,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-11-28 07:40:15,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 277 transitions. [2020-11-28 07:40:15,907 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 277 transitions. Word has length 67 [2020-11-28 07:40:15,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:15,908 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 277 transitions. [2020-11-28 07:40:15,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:40:15,908 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 277 transitions. [2020-11-28 07:40:15,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-11-28 07:40:15,911 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:15,911 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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] [2020-11-28 07:40:15,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:40:15,912 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:15,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:15,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1967083701, now seen corresponding path program 1 times [2020-11-28 07:40:15,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:40:15,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459767825] [2020-11-28 07:40:15,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:40:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-28 07:40:16,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459767825] [2020-11-28 07:40:16,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514630728] [2020-11-28 07:40:16,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/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 [2020-11-28 07:40:16,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:16,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 07:40:16,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:40:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-11-28 07:40:16,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:40:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-11-28 07:40:16,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [880833931] [2020-11-28 07:40:16,329 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2020-11-28 07:40:16,329 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:40:16,341 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:40:16,346 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:40:16,346 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:40:16,864 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-11-28 07:40:17,429 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-11-28 07:40:17,897 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 185 [2020-11-28 07:40:18,722 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) 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:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) 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) [2020-11-28 07:40:18,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:40:18,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 3] total 7 [2020-11-28 07:40:18,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297316638] [2020-11-28 07:40:18,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 07:40:18,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:40:18,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 07:40:18,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:40:18,727 INFO L87 Difference]: Start difference. First operand 205 states and 277 transitions. Second operand 8 states. [2020-11-28 07:40:18,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:18,811 INFO L93 Difference]: Finished difference Result 649 states and 873 transitions. [2020-11-28 07:40:18,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:40:18,812 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 85 [2020-11-28 07:40:18,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:18,816 INFO L225 Difference]: With dead ends: 649 [2020-11-28 07:40:18,816 INFO L226 Difference]: Without dead ends: 647 [2020-11-28 07:40:18,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:40:18,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2020-11-28 07:40:18,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 566. [2020-11-28 07:40:18,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2020-11-28 07:40:18,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 775 transitions. [2020-11-28 07:40:18,843 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 775 transitions. Word has length 85 [2020-11-28 07:40:18,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:18,843 INFO L481 AbstractCegarLoop]: Abstraction has 566 states and 775 transitions. [2020-11-28 07:40:18,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 07:40:18,844 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 775 transitions. [2020-11-28 07:40:18,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-11-28 07:40:18,857 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:18,857 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 7, 7, 5, 5, 3, 3, 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] [2020-11-28 07:40:19,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:40:19,058 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:19,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:19,058 INFO L82 PathProgramCache]: Analyzing trace with hash 219023449, now seen corresponding path program 1 times [2020-11-28 07:40:19,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:40:19,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358752082] [2020-11-28 07:40:19,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:40:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:19,177 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 275 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-11-28 07:40:19,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358752082] [2020-11-28 07:40:19,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:19,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:40:19,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969947397] [2020-11-28 07:40:19,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:40:19,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:40:19,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:40:19,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:40:19,180 INFO L87 Difference]: Start difference. First operand 566 states and 775 transitions. Second operand 3 states. [2020-11-28 07:40:19,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:19,402 INFO L93 Difference]: Finished difference Result 1260 states and 1782 transitions. [2020-11-28 07:40:19,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:40:19,402 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 143 [2020-11-28 07:40:19,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:19,407 INFO L225 Difference]: With dead ends: 1260 [2020-11-28 07:40:19,407 INFO L226 Difference]: Without dead ends: 694 [2020-11-28 07:40:19,409 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 [2020-11-28 07:40:19,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2020-11-28 07:40:19,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 629. [2020-11-28 07:40:19,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2020-11-28 07:40:19,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 859 transitions. [2020-11-28 07:40:19,431 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 859 transitions. Word has length 143 [2020-11-28 07:40:19,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:19,431 INFO L481 AbstractCegarLoop]: Abstraction has 629 states and 859 transitions. [2020-11-28 07:40:19,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:40:19,432 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 859 transitions. [2020-11-28 07:40:19,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-11-28 07:40:19,434 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:19,434 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 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] [2020-11-28 07:40:19,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-11-28 07:40:19,435 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:19,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:19,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1063587098, now seen corresponding path program 2 times [2020-11-28 07:40:19,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:40:19,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862581533] [2020-11-28 07:40:19,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:40:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:19,497 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 282 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-11-28 07:40:19,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862581533] [2020-11-28 07:40:19,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:19,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:40:19,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810171989] [2020-11-28 07:40:19,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:40:19,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:40:19,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:40:19,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:40:19,500 INFO L87 Difference]: Start difference. First operand 629 states and 859 transitions. Second operand 3 states. [2020-11-28 07:40:19,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:19,747 INFO L93 Difference]: Finished difference Result 1447 states and 2059 transitions. [2020-11-28 07:40:19,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:40:19,747 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 152 [2020-11-28 07:40:19,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:19,752 INFO L225 Difference]: With dead ends: 1447 [2020-11-28 07:40:19,752 INFO L226 Difference]: Without dead ends: 770 [2020-11-28 07:40:19,754 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 [2020-11-28 07:40:19,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2020-11-28 07:40:19,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 743. [2020-11-28 07:40:19,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-11-28 07:40:19,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1003 transitions. [2020-11-28 07:40:19,779 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1003 transitions. Word has length 152 [2020-11-28 07:40:19,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:19,779 INFO L481 AbstractCegarLoop]: Abstraction has 743 states and 1003 transitions. [2020-11-28 07:40:19,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:40:19,779 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1003 transitions. [2020-11-28 07:40:19,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-11-28 07:40:19,782 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:19,782 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 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] [2020-11-28 07:40:19,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-11-28 07:40:19,782 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:19,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:19,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1578002794, now seen corresponding path program 1 times [2020-11-28 07:40:19,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:40:19,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291397283] [2020-11-28 07:40:19,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:40:19,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 376 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-11-28 07:40:19,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291397283] [2020-11-28 07:40:19,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:19,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:40:19,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861912079] [2020-11-28 07:40:19,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:40:19,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:40:19,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:40:19,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:40:19,898 INFO L87 Difference]: Start difference. First operand 743 states and 1003 transitions. Second operand 3 states. [2020-11-28 07:40:19,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:19,934 INFO L93 Difference]: Finished difference Result 1225 states and 1656 transitions. [2020-11-28 07:40:19,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:40:19,934 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 163 [2020-11-28 07:40:19,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:19,939 INFO L225 Difference]: With dead ends: 1225 [2020-11-28 07:40:19,940 INFO L226 Difference]: Without dead ends: 743 [2020-11-28 07:40:19,941 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 [2020-11-28 07:40:19,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2020-11-28 07:40:19,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 743. [2020-11-28 07:40:19,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-11-28 07:40:19,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1001 transitions. [2020-11-28 07:40:19,967 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1001 transitions. Word has length 163 [2020-11-28 07:40:19,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:19,967 INFO L481 AbstractCegarLoop]: Abstraction has 743 states and 1001 transitions. [2020-11-28 07:40:19,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:40:19,968 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1001 transitions. [2020-11-28 07:40:19,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-11-28 07:40:19,970 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:19,970 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 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] [2020-11-28 07:40:19,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-11-28 07:40:19,971 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:19,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:19,971 INFO L82 PathProgramCache]: Analyzing trace with hash -18221924, now seen corresponding path program 1 times [2020-11-28 07:40:19,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:40:19,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830944362] [2020-11-28 07:40:19,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:40:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:40:20,016 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:40:20,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:40:20,061 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:40:20,174 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:40:20,174 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:40:20,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-11-28 07:40:20,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:40:20 BoogieIcfgContainer [2020-11-28 07:40:20,296 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:40:20,296 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:40:20,296 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:40:20,297 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:40:20,297 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:40:12" (3/4) ... [2020-11-28 07:40:20,300 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-28 07:40:20,300 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:40:20,301 INFO L168 Benchmark]: Toolchain (without parser) took 9346.11 ms. Allocated memory was 86.0 MB in the beginning and 201.3 MB in the end (delta: 115.3 MB). Free memory was 51.4 MB in the beginning and 153.2 MB in the end (delta: -101.9 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:20,302 INFO L168 Benchmark]: CDTParser took 5.60 ms. Allocated memory is still 86.0 MB. Free memory was 56.3 MB in the beginning and 68.6 MB in the end (delta: -12.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:20,303 INFO L168 Benchmark]: CACSL2BoogieTranslator took 471.15 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 51.2 MB in the beginning and 79.3 MB in the end (delta: -28.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:20,303 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.18 ms. Allocated memory is still 104.9 MB. Free memory was 79.3 MB in the beginning and 76.4 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:20,304 INFO L168 Benchmark]: Boogie Preprocessor took 39.41 ms. Allocated memory is still 104.9 MB. Free memory was 76.4 MB in the beginning and 74.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:20,304 INFO L168 Benchmark]: RCFGBuilder took 1360.58 ms. Allocated memory is still 104.9 MB. Free memory was 74.3 MB in the beginning and 67.3 MB in the end (delta: 7.0 MB). Peak memory consumption was 43.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:20,305 INFO L168 Benchmark]: TraceAbstraction took 7395.42 ms. Allocated memory was 104.9 MB in the beginning and 201.3 MB in the end (delta: 96.5 MB). Free memory was 66.5 MB in the beginning and 153.2 MB in the end (delta: -86.7 MB). Peak memory consumption was 104.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:20,305 INFO L168 Benchmark]: Witness Printer took 3.92 ms. Allocated memory is still 201.3 MB. Free memory is still 153.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:40:20,308 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 5.60 ms. Allocated memory is still 86.0 MB. Free memory was 56.3 MB in the beginning and 68.6 MB in the end (delta: -12.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 471.15 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 51.2 MB in the beginning and 79.3 MB in the end (delta: -28.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 61.18 ms. Allocated memory is still 104.9 MB. Free memory was 79.3 MB in the beginning and 76.4 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.41 ms. Allocated memory is still 104.9 MB. Free memory was 76.4 MB in the beginning and 74.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1360.58 ms. Allocated memory is still 104.9 MB. Free memory was 74.3 MB in the beginning and 67.3 MB in the end (delta: 7.0 MB). Peak memory consumption was 43.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7395.42 ms. Allocated memory was 104.9 MB in the beginning and 201.3 MB in the end (delta: 96.5 MB). Free memory was 66.5 MB in the beginning and 153.2 MB in the end (delta: -86.7 MB). Peak memory consumption was 104.8 MB. Max. memory is 16.1 GB. * Witness Printer took 3.92 ms. Allocated memory is still 201.3 MB. Free memory is still 153.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseXor at line 357. Possible FailurePath: [L618] int __retres1 ; [L11] int s__info_callback = __VERIFIER_nondet_int(); [L12] unsigned int s__in_handshake = __VERIFIER_nondet_uint(); [L13] int s__state ; [L14] int s__new_session ; [L15] int s__server ; [L16] unsigned int s__version = __VERIFIER_nondet_uint(); [L17] int s__type ; [L18] int s__init_num ; [L19] int s__bbio = __VERIFIER_nondet_int(); [L20] int s__wbio = __VERIFIER_nondet_int(); [L21] int s__hit = __VERIFIER_nondet_int(); [L22] int s__rwstate ; [L23] int s__init_buf___0 ; [L24] int s__debug = __VERIFIER_nondet_int(); [L25] int s__shutdown ; [L26] int s__ctx__info_callback = __VERIFIER_nondet_int(); [L27] unsigned int s__ctx__stats__sess_connect_renegotiate ; [L28] unsigned int s__ctx__stats__sess_connect ; [L29] unsigned int s__ctx__stats__sess_hit = __VERIFIER_nondet_uint(); [L30] unsigned int s__ctx__stats__sess_connect_good = __VERIFIER_nondet_uint(); [L31] int s__s3__change_cipher_spec ; [L32] int s__s3__flags ; [L33] int s__s3__delay_buf_pop_ret ; [L34] int s__s3__tmp__cert_req = __VERIFIER_nondet_int(); [L35] int s__s3__tmp__new_compression = __VERIFIER_nondet_int(); [L36] int s__s3__tmp__reuse_message = __VERIFIER_nondet_int(); [L37] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int(); [L38] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int(); [L39] int s__s3__tmp__next_state___0 ; [L40] int s__s3__tmp__new_compression__id = __VERIFIER_nondet_int(); [L41] int s__session__cipher ; [L42] int s__session__compress_meth ; [L43] int buf ; [L44] unsigned long tmp ; [L45] unsigned long l ; [L46] int num1 ; [L47] int cb ; [L48] int ret ; [L49] int new_state ; [L50] int state ; [L51] int skip ; [L52] int tmp___0 ; [L53] unsigned int tmp___1 = __VERIFIER_nondet_uint(); [L54] unsigned int tmp___2 = __VERIFIER_nondet_uint(); [L55] int tmp___3 = __VERIFIER_nondet_int(); [L56] int tmp___4 = __VERIFIER_nondet_int(); [L57] int tmp___5 = __VERIFIER_nondet_int(); [L58] int tmp___6 = __VERIFIER_nondet_int(); [L59] int tmp___7 = __VERIFIER_nondet_int(); [L60] int tmp___8 = __VERIFIER_nondet_int(); [L61] int tmp___9 = __VERIFIER_nondet_int(); [L62] int blastFlag ; [L63] int ag_X ; [L64] int ag_Y = __VERIFIER_nondet_int(); [L65] int __retres59 ; [L68] s__state = 12292 [L69] blastFlag = 0 [L70] tmp = __VERIFIER_nondet_int() [L71] cb = 0 [L72] ret = -1 [L73] skip = 0 [L74] tmp___0 = 0 [L75] COND TRUE s__info_callback != 0 [L76] cb = s__info_callback [L84] s__in_handshake = s__in_handshake + 1 [L85] COND TRUE tmp___1 - 12288 [L86] COND FALSE !(tmp___2 - 16384) [L95] COND TRUE 1 [L97] state = s__state [L98] COND TRUE s__state == 12292 [L201] s__new_session = 1 [L202] s__state = 4096 [L203] s__ctx__stats__sess_connect_renegotiate = s__ctx__stats__sess_connect_renegotiate + 1 [L208] s__server = 0 [L209] COND TRUE cb != 0 [L214] COND FALSE !(s__version - 65280 != 768) [L220] s__type = 4096 [L221] COND FALSE !(s__init_buf___0 == 0) [L239] COND FALSE !(! tmp___4) [L245] COND FALSE !(! tmp___5) [L251] s__state = 4368 [L252] s__ctx__stats__sess_connect = s__ctx__stats__sess_connect + 1 [L253] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND TRUE s__state == 4368 [L257] s__shutdown = 0 [L258] ret = __VERIFIER_nondet_int() [L259] COND TRUE blastFlag == 0 [L260] blastFlag = 1 [L268] COND FALSE !(ret <= 0) [L273] s__state = 4384 [L274] s__init_num = 0 [L275] COND FALSE !(s__bbio != s__wbio) [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND TRUE s__state == 4384 [L283] ret = __VERIFIER_nondet_int() [L284] COND TRUE blastFlag == 1 [L285] blastFlag = 2 [L289] COND FALSE !(ret <= 0) [L294] COND FALSE !(\read(s__hit)) [L297] s__state = 4400 [L299] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND TRUE s__state == 4400 [L303] COND FALSE !((unsigned long )s__s3__tmp__new_cipher__algorithms - 256UL) [L306] ret = __VERIFIER_nondet_int() [L307] COND TRUE blastFlag == 2 [L308] blastFlag = 3 [L312] COND FALSE !(ret <= 0) [L318] s__state = 4416 [L319] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND TRUE s__state == 4416 [L323] ret = __VERIFIER_nondet_int() [L324] COND TRUE blastFlag == 3 [L325] blastFlag = 4 [L329] COND FALSE !(ret <= 0) [L334] s__state = 4432 [L335] ag_X = (unsigned short)65535 [L336] s__init_num = 0 [L337] COND FALSE !(! tmp___6) [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND FALSE !(s__state == 4416) [L134] COND FALSE !(s__state == 4417) [L137] COND TRUE s__state == 4432 [L346] ret = __VERIFIER_nondet_int() [L347] COND FALSE !(blastFlag == 5) [L352] COND FALSE !(ret <= 0) [L357] s__state = ag_X ^ ag_Y [L358] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND TRUE s__state == 4368 [L257] s__shutdown = 0 [L258] ret = __VERIFIER_nondet_int() [L259] COND FALSE !(blastFlag == 0) [L262] COND TRUE blastFlag == 4 [L263] blastFlag = 5 [L268] COND FALSE !(ret <= 0) [L273] s__state = 4384 [L274] s__init_num = 0 [L275] COND FALSE !(s__bbio != s__wbio) [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND TRUE s__state == 4384 [L283] ret = __VERIFIER_nondet_int() [L284] COND FALSE !(blastFlag == 1) [L289] COND FALSE !(ret <= 0) [L294] COND FALSE !(\read(s__hit)) [L297] s__state = 4400 [L299] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND TRUE s__state == 4400 [L303] COND FALSE !((unsigned long )s__s3__tmp__new_cipher__algorithms - 256UL) [L306] ret = __VERIFIER_nondet_int() [L307] COND FALSE !(blastFlag == 2) [L312] COND FALSE !(ret <= 0) [L318] s__state = 4416 [L319] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND TRUE s__state == 4416 [L323] ret = __VERIFIER_nondet_int() [L324] COND FALSE !(blastFlag == 3) [L329] COND FALSE !(ret <= 0) [L334] s__state = 4432 [L335] ag_X = (unsigned short)65535 [L336] s__init_num = 0 [L337] COND FALSE !(! tmp___6) [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND FALSE !(s__state == 4416) [L134] COND FALSE !(s__state == 4417) [L137] COND TRUE s__state == 4432 [L346] ret = __VERIFIER_nondet_int() [L347] COND TRUE blastFlag == 5 [L3] __assert_fail("0", "s3_clnt_2.BV.c.cil-2a.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 84 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.1s, OverallIterations: 10, TraceHistogramMax: 11, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1223 SDtfs, 754 SDslu, 1097 SDs, 0 SdLazy, 894 SolverSat, 212 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 299 GetRequests, 277 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=743occurred in iteration=8, 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, 9 MinimizatonAttempts, 196 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 1049 NumberOfCodeBlocks, 1049 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 1009 ConstructedInterpolants, 0 QuantifiedInterpolants, 315989 SizeOfPredicates, 4 NumberOfNonLiveVariables, 420 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 13 InterpolantComputations, 9 PerfectInterpolantSequences, 1708/1967 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:40:22,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:40:22,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:40:22,915 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:40:22,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:40:22,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:40:22,919 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:40:22,922 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:40:22,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:40:22,925 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:40:22,927 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:40:22,928 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:40:22,929 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:40:22,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:40:22,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:40:22,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:40:22,935 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:40:22,936 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:40:22,939 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:40:22,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:40:22,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:40:22,946 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:40:22,947 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:40:22,949 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:40:22,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:40:22,953 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:40:22,953 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:40:22,955 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:40:22,955 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:40:22,957 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:40:22,957 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:40:22,958 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:40:22,959 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:40:22,960 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:40:22,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:40:22,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:40:22,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:40:22,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:40:22,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:40:22,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:40:22,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:40:22,968 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-11-28 07:40:23,015 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:40:23,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:40:23,017 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:40:23,017 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:40:23,018 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:40:23,018 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:40:23,018 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:40:23,018 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:40:23,018 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:40:23,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:40:23,021 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:40:23,022 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:40:23,022 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:40:23,022 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:40:23,022 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:40:23,023 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:40:23,023 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:40:23,023 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-28 07:40:23,023 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-28 07:40:23,023 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:40:23,024 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:40:23,024 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:40:23,024 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:40:23,024 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:40:23,025 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 07:40:23,025 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:40:23,025 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:40:23,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:40:23,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:40:23,026 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:40:23,026 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:40:23,026 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-11-28 07:40:23,027 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-28 07:40:23,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:40:23,027 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:40:23,027 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:40:23,028 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_29f475f6-d961-4750-835c-8c7312498a03/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6995ed6ba91d7bb4325b7b2cb6cc1ca7ba7d3a61 [2020-11-28 07:40:23,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:40:23,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:40:23,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:40:23,511 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:40:23,512 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:40:23,514 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan/../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c [2020-11-28 07:40:23,602 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan/data/5bbb72dd2/c7511a02e03142ca9c3c02e96a054530/FLAG6fa3ed393 [2020-11-28 07:40:24,294 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:40:24,297 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c [2020-11-28 07:40:24,312 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan/data/5bbb72dd2/c7511a02e03142ca9c3c02e96a054530/FLAG6fa3ed393 [2020-11-28 07:40:24,575 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan/data/5bbb72dd2/c7511a02e03142ca9c3c02e96a054530 [2020-11-28 07:40:24,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:40:24,579 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:40:24,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:40:24,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:40:24,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:40:24,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:40:24" (1/1) ... [2020-11-28 07:40:24,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fd29798 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:24, skipping insertion in model container [2020-11-28 07:40:24,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:40:24" (1/1) ... [2020-11-28 07:40:24,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:40:24,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:40:24,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:40:24,897 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:40:25,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:40:25,044 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:40:25,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:25 WrapperNode [2020-11-28 07:40:25,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:40:25,046 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:40:25,046 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:40:25,046 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:40:25,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:25" (1/1) ... [2020-11-28 07:40:25,070 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:25" (1/1) ... [2020-11-28 07:40:25,107 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:40:25,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:40:25,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:40:25,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:40:25,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:25" (1/1) ... [2020-11-28 07:40:25,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:25" (1/1) ... [2020-11-28 07:40:25,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:25" (1/1) ... [2020-11-28 07:40:25,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:25" (1/1) ... [2020-11-28 07:40:25,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:25" (1/1) ... [2020-11-28 07:40:25,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:25" (1/1) ... [2020-11-28 07:40:25,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:25" (1/1) ... [2020-11-28 07:40:25,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:40:25,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:40:25,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:40:25,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:40:25,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:25" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/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 [2020-11-28 07:40:25,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-28 07:40:25,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:40:25,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:40:25,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:40:25,461 WARN L798 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-11-28 07:40:26,328 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2020-11-28 07:40:26,328 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2020-11-28 07:40:26,338 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:40:26,338 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 07:40:26,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:40:26 BoogieIcfgContainer [2020-11-28 07:40:26,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:40:26,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:40:26,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:40:26,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:40:26,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:40:24" (1/3) ... [2020-11-28 07:40:26,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41747d7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:40:26, skipping insertion in model container [2020-11-28 07:40:26,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:25" (2/3) ... [2020-11-28 07:40:26,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41747d7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:40:26, skipping insertion in model container [2020-11-28 07:40:26,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:40:26" (3/3) ... [2020-11-28 07:40:26,361 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_2.BV.c.cil-2a.c [2020-11-28 07:40:26,373 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:40:26,378 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:40:26,390 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:40:26,418 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:40:26,418 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:40:26,419 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:40:26,419 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:40:26,419 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:40:26,419 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:40:26,419 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:40:26,420 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:40:26,436 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states. [2020-11-28 07:40:26,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-28 07:40:26,452 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:26,452 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] [2020-11-28 07:40:26,453 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:26,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:26,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1457697026, now seen corresponding path program 1 times [2020-11-28 07:40:26,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:40:26,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410443684] [2020-11-28 07:40:26,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/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 [2020-11-28 07:40:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:26,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:40:26,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:40:26,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:40:26,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:40:26,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:40:26,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410443684] [2020-11-28 07:40:26,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:26,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-28 07:40:26,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485290496] [2020-11-28 07:40:26,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:40:26,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:40:26,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:40:26,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:40:26,698 INFO L87 Difference]: Start difference. First operand 126 states. Second operand 3 states. [2020-11-28 07:40:27,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:27,036 INFO L93 Difference]: Finished difference Result 247 states and 422 transitions. [2020-11-28 07:40:27,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:40:27,038 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-11-28 07:40:27,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:27,064 INFO L225 Difference]: With dead ends: 247 [2020-11-28 07:40:27,064 INFO L226 Difference]: Without dead ends: 112 [2020-11-28 07:40:27,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:40:27,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-28 07:40:27,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-11-28 07:40:27,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-11-28 07:40:27,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 169 transitions. [2020-11-28 07:40:27,132 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 169 transitions. Word has length 24 [2020-11-28 07:40:27,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:27,133 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 169 transitions. [2020-11-28 07:40:27,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:40:27,133 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 169 transitions. [2020-11-28 07:40:27,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-28 07:40:27,135 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:27,135 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] [2020-11-28 07:40:27,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-28 07:40:27,357 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:27,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:27,357 INFO L82 PathProgramCache]: Analyzing trace with hash -611475394, now seen corresponding path program 1 times [2020-11-28 07:40:27,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:40:27,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932989731] [2020-11-28 07:40:27,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/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 [2020-11-28 07:40:27,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:27,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:40:27,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:40:27,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:40:27,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:40:27,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:40:27,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932989731] [2020-11-28 07:40:27,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:27,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-28 07:40:27,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505392665] [2020-11-28 07:40:27,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:40:27,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:40:27,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:40:27,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:40:27,515 INFO L87 Difference]: Start difference. First operand 112 states and 169 transitions. Second operand 3 states. [2020-11-28 07:40:27,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:27,736 INFO L93 Difference]: Finished difference Result 233 states and 356 transitions. [2020-11-28 07:40:27,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:40:27,737 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-11-28 07:40:27,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:27,739 INFO L225 Difference]: With dead ends: 233 [2020-11-28 07:40:27,740 INFO L226 Difference]: Without dead ends: 131 [2020-11-28 07:40:27,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:40:27,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-11-28 07:40:27,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2020-11-28 07:40:27,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-11-28 07:40:27,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 189 transitions. [2020-11-28 07:40:27,775 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 189 transitions. Word has length 36 [2020-11-28 07:40:27,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:27,777 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 189 transitions. [2020-11-28 07:40:27,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:40:27,777 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 189 transitions. [2020-11-28 07:40:27,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-28 07:40:27,780 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:27,781 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-11-28 07:40:28,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-28 07:40:28,006 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:28,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:28,006 INFO L82 PathProgramCache]: Analyzing trace with hash 213639527, now seen corresponding path program 1 times [2020-11-28 07:40:28,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:40:28,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383044284] [2020-11-28 07:40:28,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/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 [2020-11-28 07:40:28,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:28,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:40:28,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:40:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-28 07:40:28,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:40:28,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-28 07:40:28,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383044284] [2020-11-28 07:40:28,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:28,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-28 07:40:28,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089808393] [2020-11-28 07:40:28,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:40:28,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:40:28,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:40:28,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:40:28,162 INFO L87 Difference]: Start difference. First operand 127 states and 189 transitions. Second operand 3 states. [2020-11-28 07:40:28,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:28,449 INFO L93 Difference]: Finished difference Result 265 states and 400 transitions. [2020-11-28 07:40:28,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:40:28,450 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-11-28 07:40:28,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:28,452 INFO L225 Difference]: With dead ends: 265 [2020-11-28 07:40:28,452 INFO L226 Difference]: Without dead ends: 148 [2020-11-28 07:40:28,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:40:28,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-11-28 07:40:28,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2020-11-28 07:40:28,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-11-28 07:40:28,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 211 transitions. [2020-11-28 07:40:28,472 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 211 transitions. Word has length 50 [2020-11-28 07:40:28,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:28,473 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 211 transitions. [2020-11-28 07:40:28,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:40:28,473 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 211 transitions. [2020-11-28 07:40:28,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-28 07:40:28,476 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:28,477 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2020-11-28 07:40:28,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-28 07:40:28,692 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:28,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:28,693 INFO L82 PathProgramCache]: Analyzing trace with hash 370823208, now seen corresponding path program 1 times [2020-11-28 07:40:28,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:40:28,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363506024] [2020-11-28 07:40:28,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/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 [2020-11-28 07:40:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:28,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:40:28,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:40:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-28 07:40:28,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:40:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-28 07:40:28,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363506024] [2020-11-28 07:40:28,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:28,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-28 07:40:28,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59068944] [2020-11-28 07:40:28,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:40:28,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:40:28,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:40:28,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:40:28,893 INFO L87 Difference]: Start difference. First operand 144 states and 211 transitions. Second operand 4 states. [2020-11-28 07:40:29,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:29,367 INFO L93 Difference]: Finished difference Result 349 states and 534 transitions. [2020-11-28 07:40:29,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:40:29,368 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-11-28 07:40:29,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:29,371 INFO L225 Difference]: With dead ends: 349 [2020-11-28 07:40:29,371 INFO L226 Difference]: Without dead ends: 215 [2020-11-28 07:40:29,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:40:29,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-11-28 07:40:29,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 207. [2020-11-28 07:40:29,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-11-28 07:40:29,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 297 transitions. [2020-11-28 07:40:29,410 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 297 transitions. Word has length 67 [2020-11-28 07:40:29,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:29,411 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 297 transitions. [2020-11-28 07:40:29,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:40:29,411 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 297 transitions. [2020-11-28 07:40:29,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-28 07:40:29,414 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:29,414 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2020-11-28 07:40:29,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-11-28 07:40:29,615 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:29,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:29,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1528022105, now seen corresponding path program 1 times [2020-11-28 07:40:29,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:40:29,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414974193] [2020-11-28 07:40:29,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/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 [2020-11-28 07:40:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:29,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:40:29,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:40:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-28 07:40:29,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:40:29,760 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-28 07:40:29,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414974193] [2020-11-28 07:40:29,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:29,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-28 07:40:29,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241118504] [2020-11-28 07:40:29,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:40:29,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:40:29,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:40:29,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:40:29,764 INFO L87 Difference]: Start difference. First operand 207 states and 297 transitions. Second operand 3 states. [2020-11-28 07:40:30,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:30,008 INFO L93 Difference]: Finished difference Result 427 states and 620 transitions. [2020-11-28 07:40:30,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:40:30,009 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-11-28 07:40:30,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:30,012 INFO L225 Difference]: With dead ends: 427 [2020-11-28 07:40:30,012 INFO L226 Difference]: Without dead ends: 230 [2020-11-28 07:40:30,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:40:30,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-11-28 07:40:30,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 226. [2020-11-28 07:40:30,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-11-28 07:40:30,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 321 transitions. [2020-11-28 07:40:30,039 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 321 transitions. Word has length 68 [2020-11-28 07:40:30,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:30,039 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 321 transitions. [2020-11-28 07:40:30,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:40:30,040 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 321 transitions. [2020-11-28 07:40:30,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-11-28 07:40:30,044 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:30,044 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2020-11-28 07:40:30,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-11-28 07:40:30,245 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:30,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:30,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1678422895, now seen corresponding path program 1 times [2020-11-28 07:40:30,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:40:30,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1168313262] [2020-11-28 07:40:30,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/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 [2020-11-28 07:40:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:30,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:40:30,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:40:30,419 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-11-28 07:40:30,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:40:30,446 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-11-28 07:40:30,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1168313262] [2020-11-28 07:40:30,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:30,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-28 07:40:30,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414443052] [2020-11-28 07:40:30,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:40:30,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:40:30,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:40:30,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:40:30,463 INFO L87 Difference]: Start difference. First operand 226 states and 321 transitions. Second operand 3 states. [2020-11-28 07:40:30,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:30,713 INFO L93 Difference]: Finished difference Result 466 states and 670 transitions. [2020-11-28 07:40:30,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:40:30,714 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-11-28 07:40:30,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:30,717 INFO L225 Difference]: With dead ends: 466 [2020-11-28 07:40:30,717 INFO L226 Difference]: Without dead ends: 250 [2020-11-28 07:40:30,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:40:30,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-11-28 07:40:30,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 247. [2020-11-28 07:40:30,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-11-28 07:40:30,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 347 transitions. [2020-11-28 07:40:30,741 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 347 transitions. Word has length 84 [2020-11-28 07:40:30,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:30,743 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 347 transitions. [2020-11-28 07:40:30,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:40:30,744 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 347 transitions. [2020-11-28 07:40:30,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-11-28 07:40:30,758 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:30,759 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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] [2020-11-28 07:40:30,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-11-28 07:40:30,964 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:30,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:30,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1619803512, now seen corresponding path program 1 times [2020-11-28 07:40:30,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:40:30,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523801287] [2020-11-28 07:40:30,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/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 [2020-11-28 07:40:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:31,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:40:31,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:40:31,104 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-28 07:40:31,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:40:31,138 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-28 07:40:31,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523801287] [2020-11-28 07:40:31,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:31,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-28 07:40:31,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367015123] [2020-11-28 07:40:31,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:40:31,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:40:31,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:40:31,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:40:31,141 INFO L87 Difference]: Start difference. First operand 247 states and 347 transitions. Second operand 4 states. [2020-11-28 07:40:31,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:31,234 INFO L93 Difference]: Finished difference Result 743 states and 1042 transitions. [2020-11-28 07:40:31,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:40:31,235 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2020-11-28 07:40:31,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:31,242 INFO L225 Difference]: With dead ends: 743 [2020-11-28 07:40:31,242 INFO L226 Difference]: Without dead ends: 506 [2020-11-28 07:40:31,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:40:31,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-11-28 07:40:31,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 506. [2020-11-28 07:40:31,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2020-11-28 07:40:31,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 702 transitions. [2020-11-28 07:40:31,294 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 702 transitions. Word has length 103 [2020-11-28 07:40:31,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:31,295 INFO L481 AbstractCegarLoop]: Abstraction has 506 states and 702 transitions. [2020-11-28 07:40:31,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:40:31,295 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 702 transitions. [2020-11-28 07:40:31,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-11-28 07:40:31,298 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:31,299 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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] [2020-11-28 07:40:31,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-11-28 07:40:31,515 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:31,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:31,515 INFO L82 PathProgramCache]: Analyzing trace with hash -847602632, now seen corresponding path program 1 times [2020-11-28 07:40:31,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:40:31,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [770770736] [2020-11-28 07:40:31,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-11-28 07:40:31,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:31,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:40:31,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:40:31,651 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-11-28 07:40:31,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:40:31,692 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-11-28 07:40:31,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [770770736] [2020-11-28 07:40:31,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:31,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-28 07:40:31,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388268139] [2020-11-28 07:40:31,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:40:31,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:40:31,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:40:31,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:40:31,695 INFO L87 Difference]: Start difference. First operand 506 states and 702 transitions. Second operand 3 states. [2020-11-28 07:40:31,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:31,749 INFO L93 Difference]: Finished difference Result 1023 states and 1418 transitions. [2020-11-28 07:40:31,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:40:31,750 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 103 [2020-11-28 07:40:31,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:31,755 INFO L225 Difference]: With dead ends: 1023 [2020-11-28 07:40:31,755 INFO L226 Difference]: Without dead ends: 527 [2020-11-28 07:40:31,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:40:31,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2020-11-28 07:40:31,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 527. [2020-11-28 07:40:31,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2020-11-28 07:40:31,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 729 transitions. [2020-11-28 07:40:31,786 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 729 transitions. Word has length 103 [2020-11-28 07:40:31,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:31,786 INFO L481 AbstractCegarLoop]: Abstraction has 527 states and 729 transitions. [2020-11-28 07:40:31,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:40:31,786 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 729 transitions. [2020-11-28 07:40:31,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-11-28 07:40:31,789 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:31,790 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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] [2020-11-28 07:40:32,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-11-28 07:40:32,004 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:32,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:32,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1168582955, now seen corresponding path program 1 times [2020-11-28 07:40:32,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:40:32,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895402072] [2020-11-28 07:40:32,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-11-28 07:40:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:32,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:40:32,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:40:32,146 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-11-28 07:40:32,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:40:32,184 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-11-28 07:40:32,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895402072] [2020-11-28 07:40:32,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:32,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-28 07:40:32,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242915521] [2020-11-28 07:40:32,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:40:32,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:40:32,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:40:32,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:40:32,191 INFO L87 Difference]: Start difference. First operand 527 states and 729 transitions. Second operand 3 states. [2020-11-28 07:40:32,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:32,246 INFO L93 Difference]: Finished difference Result 1070 states and 1478 transitions. [2020-11-28 07:40:32,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:40:32,247 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 104 [2020-11-28 07:40:32,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:32,252 INFO L225 Difference]: With dead ends: 1070 [2020-11-28 07:40:32,252 INFO L226 Difference]: Without dead ends: 553 [2020-11-28 07:40:32,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:40:32,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2020-11-28 07:40:32,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2020-11-28 07:40:32,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2020-11-28 07:40:32,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 762 transitions. [2020-11-28 07:40:32,275 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 762 transitions. Word has length 104 [2020-11-28 07:40:32,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:32,276 INFO L481 AbstractCegarLoop]: Abstraction has 553 states and 762 transitions. [2020-11-28 07:40:32,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:40:32,276 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 762 transitions. [2020-11-28 07:40:32,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-28 07:40:32,278 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:32,278 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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] [2020-11-28 07:40:32,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2020-11-28 07:40:32,498 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:32,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:32,499 INFO L82 PathProgramCache]: Analyzing trace with hash -53319870, now seen corresponding path program 1 times [2020-11-28 07:40:32,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:40:32,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380151156] [2020-11-28 07:40:32,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/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 [2020-11-28 07:40:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:32,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:40:32,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:40:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-11-28 07:40:32,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:40:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-11-28 07:40:32,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380151156] [2020-11-28 07:40:32,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:32,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-28 07:40:32,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502376562] [2020-11-28 07:40:32,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:40:32,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:40:32,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:40:32,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:40:32,696 INFO L87 Difference]: Start difference. First operand 553 states and 762 transitions. Second operand 4 states. [2020-11-28 07:40:32,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:32,830 INFO L93 Difference]: Finished difference Result 1520 states and 2113 transitions. [2020-11-28 07:40:32,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:40:32,830 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-11-28 07:40:32,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:32,837 INFO L225 Difference]: With dead ends: 1520 [2020-11-28 07:40:32,837 INFO L226 Difference]: Without dead ends: 1003 [2020-11-28 07:40:32,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:40:32,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2020-11-28 07:40:32,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 1003. [2020-11-28 07:40:32,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2020-11-28 07:40:32,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1392 transitions. [2020-11-28 07:40:32,887 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1392 transitions. Word has length 105 [2020-11-28 07:40:32,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:32,887 INFO L481 AbstractCegarLoop]: Abstraction has 1003 states and 1392 transitions. [2020-11-28 07:40:32,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:40:32,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1392 transitions. [2020-11-28 07:40:32,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-11-28 07:40:32,891 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:32,891 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 7, 7, 5, 5, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:40:33,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2020-11-28 07:40:33,106 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:33,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:33,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1519363111, now seen corresponding path program 1 times [2020-11-28 07:40:33,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:40:33,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51717194] [2020-11-28 07:40:33,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2020-11-28 07:40:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:33,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:40:33,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:40:33,282 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-11-28 07:40:33,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:40:33,325 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-11-28 07:40:33,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51717194] [2020-11-28 07:40:33,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:33,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-28 07:40:33,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58578225] [2020-11-28 07:40:33,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:40:33,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:40:33,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:40:33,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:40:33,327 INFO L87 Difference]: Start difference. First operand 1003 states and 1392 transitions. Second operand 4 states. [2020-11-28 07:40:33,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:33,682 INFO L93 Difference]: Finished difference Result 2091 states and 2938 transitions. [2020-11-28 07:40:33,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:40:33,684 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 173 [2020-11-28 07:40:33,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:33,691 INFO L225 Difference]: With dead ends: 2091 [2020-11-28 07:40:33,691 INFO L226 Difference]: Without dead ends: 1124 [2020-11-28 07:40:33,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:40:33,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2020-11-28 07:40:33,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1095. [2020-11-28 07:40:33,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1095 states. [2020-11-28 07:40:33,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1500 transitions. [2020-11-28 07:40:33,736 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1500 transitions. Word has length 173 [2020-11-28 07:40:33,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:33,737 INFO L481 AbstractCegarLoop]: Abstraction has 1095 states and 1500 transitions. [2020-11-28 07:40:33,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:40:33,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1500 transitions. [2020-11-28 07:40:33,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-11-28 07:40:33,741 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:33,741 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2020-11-28 07:40:33,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 mathsat -unsat_core_generation=3 [2020-11-28 07:40:33,953 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:33,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:33,953 INFO L82 PathProgramCache]: Analyzing trace with hash -759567935, now seen corresponding path program 1 times [2020-11-28 07:40:33,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:40:33,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440757871] [2020-11-28 07:40:33,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2020-11-28 07:40:34,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:34,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:40:34,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:40:34,147 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-11-28 07:40:34,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:40:34,229 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-11-28 07:40:34,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440757871] [2020-11-28 07:40:34,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:34,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-28 07:40:34,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174260003] [2020-11-28 07:40:34,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:40:34,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:40:34,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:40:34,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:40:34,233 INFO L87 Difference]: Start difference. First operand 1095 states and 1500 transitions. Second operand 3 states. [2020-11-28 07:40:34,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:34,298 INFO L93 Difference]: Finished difference Result 2409 states and 3304 transitions. [2020-11-28 07:40:34,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:40:34,298 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 194 [2020-11-28 07:40:34,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:34,306 INFO L225 Difference]: With dead ends: 2409 [2020-11-28 07:40:34,306 INFO L226 Difference]: Without dead ends: 1350 [2020-11-28 07:40:34,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:40:34,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2020-11-28 07:40:34,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1350. [2020-11-28 07:40:34,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1350 states. [2020-11-28 07:40:34,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 1847 transitions. [2020-11-28 07:40:34,360 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 1847 transitions. Word has length 194 [2020-11-28 07:40:34,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:34,360 INFO L481 AbstractCegarLoop]: Abstraction has 1350 states and 1847 transitions. [2020-11-28 07:40:34,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:40:34,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 1847 transitions. [2020-11-28 07:40:34,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-11-28 07:40:34,365 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:34,365 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2020-11-28 07:40:34,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3 [2020-11-28 07:40:34,578 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:34,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:34,578 INFO L82 PathProgramCache]: Analyzing trace with hash 342847369, now seen corresponding path program 1 times [2020-11-28 07:40:34,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:40:34,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465640215] [2020-11-28 07:40:34,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2020-11-28 07:40:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:40:34,728 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:40:34,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:40:34,836 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:40:35,237 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-11-28 07:40:35,237 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:40:35,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 mathsat -unsat_core_generation=3 [2020-11-28 07:40:35,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:40:35 BoogieIcfgContainer [2020-11-28 07:40:35,626 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:40:35,626 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:40:35,627 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:40:35,627 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:40:35,627 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:40:26" (3/4) ... [2020-11-28 07:40:35,629 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:40:35,803 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_29f475f6-d961-4750-835c-8c7312498a03/bin/utaipan/witness.graphml [2020-11-28 07:40:35,804 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:40:35,806 INFO L168 Benchmark]: Toolchain (without parser) took 11225.36 ms. Allocated memory was 65.0 MB in the beginning and 163.6 MB in the end (delta: 98.6 MB). Free memory was 44.6 MB in the beginning and 92.1 MB in the end (delta: -47.5 MB). Peak memory consumption was 49.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:35,807 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 65.0 MB. Free memory was 45.9 MB in the beginning and 45.9 MB in the end (delta: 31.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:40:35,807 INFO L168 Benchmark]: CACSL2BoogieTranslator took 461.26 ms. Allocated memory is still 65.0 MB. Free memory was 44.4 MB in the beginning and 44.7 MB in the end (delta: -302.8 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:35,807 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.91 ms. Allocated memory is still 65.0 MB. Free memory was 44.5 MB in the beginning and 42.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:35,808 INFO L168 Benchmark]: Boogie Preprocessor took 47.70 ms. Allocated memory is still 65.0 MB. Free memory was 42.1 MB in the beginning and 40.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:35,808 INFO L168 Benchmark]: RCFGBuilder took 1184.85 ms. Allocated memory was 65.0 MB in the beginning and 92.3 MB in the end (delta: 27.3 MB). Free memory was 40.1 MB in the beginning and 56.8 MB in the end (delta: -16.7 MB). Peak memory consumption was 19.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:35,809 INFO L168 Benchmark]: TraceAbstraction took 9279.05 ms. Allocated memory was 92.3 MB in the beginning and 163.6 MB in the end (delta: 71.3 MB). Free memory was 56.3 MB in the beginning and 113.1 MB in the end (delta: -56.8 MB). Peak memory consumption was 83.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:35,809 INFO L168 Benchmark]: Witness Printer took 177.44 ms. Allocated memory is still 163.6 MB. Free memory was 113.1 MB in the beginning and 92.1 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:35,812 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 65.0 MB. Free memory was 45.9 MB in the beginning and 45.9 MB in the end (delta: 31.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 461.26 ms. Allocated memory is still 65.0 MB. Free memory was 44.4 MB in the beginning and 44.7 MB in the end (delta: -302.8 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 60.91 ms. Allocated memory is still 65.0 MB. Free memory was 44.5 MB in the beginning and 42.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.70 ms. Allocated memory is still 65.0 MB. Free memory was 42.1 MB in the beginning and 40.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1184.85 ms. Allocated memory was 65.0 MB in the beginning and 92.3 MB in the end (delta: 27.3 MB). Free memory was 40.1 MB in the beginning and 56.8 MB in the end (delta: -16.7 MB). Peak memory consumption was 19.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9279.05 ms. Allocated memory was 92.3 MB in the beginning and 163.6 MB in the end (delta: 71.3 MB). Free memory was 56.3 MB in the beginning and 113.1 MB in the end (delta: -56.8 MB). Peak memory consumption was 83.5 MB. Max. memory is 16.1 GB. * Witness Printer took 177.44 ms. Allocated memory is still 163.6 MB. Free memory was 113.1 MB in the beginning and 92.1 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L618] int __retres1 ; [L11] int s__info_callback = __VERIFIER_nondet_int(); [L12] unsigned int s__in_handshake = __VERIFIER_nondet_uint(); [L13] int s__state ; [L14] int s__new_session ; [L15] int s__server ; [L16] unsigned int s__version = __VERIFIER_nondet_uint(); [L17] int s__type ; [L18] int s__init_num ; [L19] int s__bbio = __VERIFIER_nondet_int(); [L20] int s__wbio = __VERIFIER_nondet_int(); [L21] int s__hit = __VERIFIER_nondet_int(); [L22] int s__rwstate ; [L23] int s__init_buf___0 ; [L24] int s__debug = __VERIFIER_nondet_int(); [L25] int s__shutdown ; [L26] int s__ctx__info_callback = __VERIFIER_nondet_int(); [L27] unsigned int s__ctx__stats__sess_connect_renegotiate ; [L28] unsigned int s__ctx__stats__sess_connect ; [L29] unsigned int s__ctx__stats__sess_hit = __VERIFIER_nondet_uint(); [L30] unsigned int s__ctx__stats__sess_connect_good = __VERIFIER_nondet_uint(); [L31] int s__s3__change_cipher_spec ; [L32] int s__s3__flags ; [L33] int s__s3__delay_buf_pop_ret ; [L34] int s__s3__tmp__cert_req = __VERIFIER_nondet_int(); [L35] int s__s3__tmp__new_compression = __VERIFIER_nondet_int(); [L36] int s__s3__tmp__reuse_message = __VERIFIER_nondet_int(); [L37] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int(); [L38] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int(); [L39] int s__s3__tmp__next_state___0 ; [L40] int s__s3__tmp__new_compression__id = __VERIFIER_nondet_int(); [L41] int s__session__cipher ; [L42] int s__session__compress_meth ; [L43] int buf ; [L44] unsigned long tmp ; [L45] unsigned long l ; [L46] int num1 ; [L47] int cb ; [L48] int ret ; [L49] int new_state ; [L50] int state ; [L51] int skip ; [L52] int tmp___0 ; [L53] unsigned int tmp___1 = __VERIFIER_nondet_uint(); [L54] unsigned int tmp___2 = __VERIFIER_nondet_uint(); [L55] int tmp___3 = __VERIFIER_nondet_int(); [L56] int tmp___4 = __VERIFIER_nondet_int(); [L57] int tmp___5 = __VERIFIER_nondet_int(); [L58] int tmp___6 = __VERIFIER_nondet_int(); [L59] int tmp___7 = __VERIFIER_nondet_int(); [L60] int tmp___8 = __VERIFIER_nondet_int(); [L61] int tmp___9 = __VERIFIER_nondet_int(); [L62] int blastFlag ; [L63] int ag_X ; [L64] int ag_Y = __VERIFIER_nondet_int(); [L65] int __retres59 ; [L68] s__state = 12292 [L69] blastFlag = 0 [L70] tmp = __VERIFIER_nondet_int() [L71] cb = 0 [L72] ret = -1 [L73] skip = 0 [L74] tmp___0 = 0 [L75] COND TRUE s__info_callback != 0 [L76] cb = s__info_callback [L84] s__in_handshake = s__in_handshake + 1 [L85] COND FALSE !(tmp___1 - 12288) [L95] COND TRUE 1 [L97] state = s__state [L98] COND TRUE s__state == 12292 [L201] s__new_session = 1 [L202] s__state = 4096 [L203] s__ctx__stats__sess_connect_renegotiate = s__ctx__stats__sess_connect_renegotiate + 1 [L208] s__server = 0 [L209] COND TRUE cb != 0 [L214] COND FALSE !(s__version - 65280 != 768) [L220] s__type = 4096 [L221] COND FALSE !(s__init_buf___0 == 0) [L239] COND FALSE !(! tmp___4) [L245] COND FALSE !(! tmp___5) [L251] s__state = 4368 [L252] s__ctx__stats__sess_connect = s__ctx__stats__sess_connect + 1 [L253] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND TRUE s__state == 4368 [L257] s__shutdown = 0 [L258] ret = __VERIFIER_nondet_int() [L259] COND TRUE blastFlag == 0 [L260] blastFlag = 1 [L268] COND FALSE !(ret <= 0) [L273] s__state = 4384 [L274] s__init_num = 0 [L275] COND TRUE s__bbio != s__wbio [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND TRUE s__state == 4384 [L283] ret = __VERIFIER_nondet_int() [L284] COND TRUE blastFlag == 1 [L285] blastFlag = 2 [L289] COND FALSE !(ret <= 0) [L294] COND FALSE !(\read(s__hit)) [L297] s__state = 4400 [L299] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND TRUE s__state == 4400 [L303] COND FALSE !((unsigned long )s__s3__tmp__new_cipher__algorithms - 256UL) [L306] ret = __VERIFIER_nondet_int() [L307] COND TRUE blastFlag == 2 [L308] blastFlag = 3 [L312] COND FALSE !(ret <= 0) [L318] s__state = 4416 [L319] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND TRUE s__state == 4416 [L323] ret = __VERIFIER_nondet_int() [L324] COND TRUE blastFlag == 3 [L325] blastFlag = 4 [L329] COND FALSE !(ret <= 0) [L334] s__state = 4432 [L335] ag_X = (unsigned short)65535 [L336] s__init_num = 0 [L337] COND FALSE !(! tmp___6) [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND FALSE !(s__state == 4416) [L134] COND FALSE !(s__state == 4417) [L137] COND TRUE s__state == 4432 [L346] ret = __VERIFIER_nondet_int() [L347] COND FALSE !(blastFlag == 5) [L352] COND FALSE !(ret <= 0) [L357] s__state = ag_X ^ ag_Y [L358] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND TRUE s__state == 4368 [L257] s__shutdown = 0 [L258] ret = __VERIFIER_nondet_int() [L259] COND FALSE !(blastFlag == 0) [L262] COND TRUE blastFlag == 4 [L263] blastFlag = 5 [L268] COND FALSE !(ret <= 0) [L273] s__state = 4384 [L274] s__init_num = 0 [L275] COND TRUE s__bbio != s__wbio [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND TRUE s__state == 4384 [L283] ret = __VERIFIER_nondet_int() [L284] COND FALSE !(blastFlag == 1) [L289] COND FALSE !(ret <= 0) [L294] COND FALSE !(\read(s__hit)) [L297] s__state = 4400 [L299] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND TRUE s__state == 4400 [L303] COND FALSE !((unsigned long )s__s3__tmp__new_cipher__algorithms - 256UL) [L306] ret = __VERIFIER_nondet_int() [L307] COND FALSE !(blastFlag == 2) [L312] COND FALSE !(ret <= 0) [L318] s__state = 4416 [L319] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND TRUE s__state == 4416 [L323] ret = __VERIFIER_nondet_int() [L324] COND FALSE !(blastFlag == 3) [L329] COND FALSE !(ret <= 0) [L334] s__state = 4432 [L335] ag_X = (unsigned short)65535 [L336] s__init_num = 0 [L337] COND FALSE !(! tmp___6) [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND FALSE !(s__state == 4416) [L134] COND FALSE !(s__state == 4417) [L137] COND TRUE s__state == 4432 [L346] ret = __VERIFIER_nondet_int() [L347] COND TRUE blastFlag == 5 [L3] __assert_fail("0", "s3_clnt_2.BV.c.cil-2a.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 126 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.0s, OverallIterations: 13, TraceHistogramMax: 11, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2289 SDtfs, 1139 SDslu, 1557 SDs, 0 SdLazy, 931 SolverSat, 167 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2198 GetRequests, 2182 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1350occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 12 MinimizatonAttempts, 52 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 1307 NumberOfCodeBlocks, 1307 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 2198 ConstructedInterpolants, 0 QuantifiedInterpolants, 431278 SizeOfPredicates, 10 NumberOfNonLiveVariables, 1930 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 24 InterpolantComputations, 24 PerfectInterpolantSequences, 3576/3576 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...