./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 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/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_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/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 a92f0f2e799b323440c6f0b05c6a9c0af057fa0c ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/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_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/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 a92f0f2e799b323440c6f0b05c6a9c0af057fa0c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.2.0-7b2dab5 [2020-12-09 04:53:07,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 04:53:07,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 04:53:07,611 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 04:53:07,611 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 04:53:07,613 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 04:53:07,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 04:53:07,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 04:53:07,627 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 04:53:07,628 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 04:53:07,629 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 04:53:07,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 04:53:07,631 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 04:53:07,632 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 04:53:07,633 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 04:53:07,634 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 04:53:07,635 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 04:53:07,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 04:53:07,638 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 04:53:07,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 04:53:07,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 04:53:07,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 04:53:07,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 04:53:07,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 04:53:07,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 04:53:07,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 04:53:07,649 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 04:53:07,650 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 04:53:07,651 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 04:53:07,652 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 04:53:07,652 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 04:53:07,653 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 04:53:07,654 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 04:53:07,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 04:53:07,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 04:53:07,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 04:53:07,657 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 04:53:07,657 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 04:53:07,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 04:53:07,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 04:53:07,658 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 04:53:07,659 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 04:53:07,676 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 04:53:07,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 04:53:07,677 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 04:53:07,677 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 04:53:07,677 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 04:53:07,677 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 04:53:07,677 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 04:53:07,678 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 04:53:07,678 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 04:53:07,678 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 04:53:07,678 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 04:53:07,678 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 04:53:07,678 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 04:53:07,678 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 04:53:07,678 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 04:53:07,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 04:53:07,679 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 04:53:07,679 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 04:53:07,679 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 04:53:07,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 04:53:07,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 04:53:07,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 04:53:07,680 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 04:53:07,680 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 04:53:07,680 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 04:53:07,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 04:53:07,680 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 04:53:07,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 04:53:07,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 04:53:07,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 04:53:07,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:53:07,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 04:53:07,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 04:53:07,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 04:53:07,681 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 04:53:07,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 04:53:07,681 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 04:53:07,681 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 04:53:07,681 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 04:53:07,681 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_94aef366-3a5f-4a13-a6b0-818f164220f0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a92f0f2e799b323440c6f0b05c6a9c0af057fa0c [2020-12-09 04:53:07,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 04:53:07,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 04:53:07,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 04:53:07,870 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 04:53:07,870 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 04:53:07,871 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c [2020-12-09 04:53:07,914 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/data/9dd2507dd/1f676a062cb448f9bf960e447c04074f/FLAG361cb7565 [2020-12-09 04:53:08,292 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 04:53:08,293 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c [2020-12-09 04:53:08,301 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/data/9dd2507dd/1f676a062cb448f9bf960e447c04074f/FLAG361cb7565 [2020-12-09 04:53:08,311 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/data/9dd2507dd/1f676a062cb448f9bf960e447c04074f [2020-12-09 04:53:08,313 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 04:53:08,314 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 04:53:08,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 04:53:08,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 04:53:08,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 04:53:08,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:53:08" (1/1) ... [2020-12-09 04:53:08,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57b76724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:53:08, skipping insertion in model container [2020-12-09 04:53:08,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:53:08" (1/1) ... [2020-12-09 04:53:08,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 04:53:08,364 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 04:53:08,519 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c[37311,37324] [2020-12-09 04:53:08,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:53:08,535 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 04:53:08,579 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c[37311,37324] [2020-12-09 04:53:08,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:53:08,595 INFO L208 MainTranslator]: Completed translation [2020-12-09 04:53:08,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:53:08 WrapperNode [2020-12-09 04:53:08,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 04:53:08,597 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 04:53:08,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 04:53:08,597 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 04:53:08,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:53:08" (1/1) ... [2020-12-09 04:53:08,610 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:53:08" (1/1) ... [2020-12-09 04:53:08,636 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 04:53:08,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 04:53:08,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 04:53:08,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 04:53:08,642 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:53:08" (1/1) ... [2020-12-09 04:53:08,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:53:08" (1/1) ... [2020-12-09 04:53:08,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:53:08" (1/1) ... [2020-12-09 04:53:08,646 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:53:08" (1/1) ... [2020-12-09 04:53:08,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:53:08" (1/1) ... [2020-12-09 04:53:08,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:53:08" (1/1) ... [2020-12-09 04:53:08,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:53:08" (1/1) ... [2020-12-09 04:53:08,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 04:53:08,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 04:53:08,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 04:53:08,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 04:53:08,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:53:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:53:08,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 04:53:08,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 04:53:08,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 04:53:08,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 04:53:08,799 WARN L800 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-12-09 04:53:09,109 INFO L752 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2020-12-09 04:53:09,109 INFO L752 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2020-12-09 04:53:09,411 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 04:53:09,411 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 04:53:09,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:53:09 BoogieIcfgContainer [2020-12-09 04:53:09,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 04:53:09,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 04:53:09,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 04:53:09,416 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 04:53:09,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:53:08" (1/3) ... [2020-12-09 04:53:09,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73a23648 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:53:09, skipping insertion in model container [2020-12-09 04:53:09,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:53:08" (2/3) ... [2020-12-09 04:53:09,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73a23648 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:53:09, skipping insertion in model container [2020-12-09 04:53:09,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:53:09" (3/3) ... [2020-12-09 04:53:09,419 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_2.BV.c.cil-2a.c [2020-12-09 04:53:09,428 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 04:53:09,431 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 04:53:09,438 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 04:53:09,455 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 04:53:09,455 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 04:53:09,455 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 04:53:09,455 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 04:53:09,455 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 04:53:09,455 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 04:53:09,455 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 04:53:09,455 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 04:53:09,466 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2020-12-09 04:53:09,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 04:53:09,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:53:09,470 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:53:09,471 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:53:09,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:53:09,475 INFO L82 PathProgramCache]: Analyzing trace with hash 353358731, now seen corresponding path program 1 times [2020-12-09 04:53:09,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:53:09,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119884358] [2020-12-09 04:53:09,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:53:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:53:09,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:53:09,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119884358] [2020-12-09 04:53:09,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:53:09,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 04:53:09,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506047224] [2020-12-09 04:53:09,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:53:09,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:53:09,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:53:09,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:09,614 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 3 states. [2020-12-09 04:53:09,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:53:09,718 INFO L93 Difference]: Finished difference Result 169 states and 293 transitions. [2020-12-09 04:53:09,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:53:09,719 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-09 04:53:09,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:53:09,727 INFO L225 Difference]: With dead ends: 169 [2020-12-09 04:53:09,727 INFO L226 Difference]: Without dead ends: 83 [2020-12-09 04:53:09,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:09,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-09 04:53:09,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-12-09 04:53:09,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-09 04:53:09,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 120 transitions. [2020-12-09 04:53:09,756 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 120 transitions. Word has length 19 [2020-12-09 04:53:09,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:53:09,756 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 120 transitions. [2020-12-09 04:53:09,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:53:09,757 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 120 transitions. [2020-12-09 04:53:09,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-09 04:53:09,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:53:09,757 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] [2020-12-09 04:53:09,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 04:53:09,758 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:53:09,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:53:09,758 INFO L82 PathProgramCache]: Analyzing trace with hash 982323864, now seen corresponding path program 1 times [2020-12-09 04:53:09,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:53:09,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889716996] [2020-12-09 04:53:09,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:53:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:53:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:53:09,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889716996] [2020-12-09 04:53:09,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:53:09,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:53:09,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949793474] [2020-12-09 04:53:09,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:53:09,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:53:09,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:53:09,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:09,810 INFO L87 Difference]: Start difference. First operand 83 states and 120 transitions. Second operand 3 states. [2020-12-09 04:53:09,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:53:09,905 INFO L93 Difference]: Finished difference Result 178 states and 261 transitions. [2020-12-09 04:53:09,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:53:09,905 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-12-09 04:53:09,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:53:09,906 INFO L225 Difference]: With dead ends: 178 [2020-12-09 04:53:09,907 INFO L226 Difference]: Without dead ends: 98 [2020-12-09 04:53:09,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:09,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-09 04:53:09,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2020-12-09 04:53:09,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-09 04:53:09,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 136 transitions. [2020-12-09 04:53:09,914 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 136 transitions. Word has length 28 [2020-12-09 04:53:09,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:53:09,914 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 136 transitions. [2020-12-09 04:53:09,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:53:09,915 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 136 transitions. [2020-12-09 04:53:09,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-09 04:53:09,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:53:09,916 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] [2020-12-09 04:53:09,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 04:53:09,916 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:53:09,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:53:09,916 INFO L82 PathProgramCache]: Analyzing trace with hash 766773566, now seen corresponding path program 1 times [2020-12-09 04:53:09,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:53:09,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120915200] [2020-12-09 04:53:09,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:53:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:53:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 04:53:09,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120915200] [2020-12-09 04:53:09,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:53:09,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:53:09,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153947960] [2020-12-09 04:53:09,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:53:09,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:53:09,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:53:09,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:09,963 INFO L87 Difference]: Start difference. First operand 96 states and 136 transitions. Second operand 3 states. [2020-12-09 04:53:10,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:53:10,048 INFO L93 Difference]: Finished difference Result 206 states and 297 transitions. [2020-12-09 04:53:10,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:53:10,049 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-12-09 04:53:10,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:53:10,050 INFO L225 Difference]: With dead ends: 206 [2020-12-09 04:53:10,050 INFO L226 Difference]: Without dead ends: 113 [2020-12-09 04:53:10,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:10,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-09 04:53:10,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2020-12-09 04:53:10,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-09 04:53:10,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 154 transitions. [2020-12-09 04:53:10,057 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 154 transitions. Word has length 39 [2020-12-09 04:53:10,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:53:10,057 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 154 transitions. [2020-12-09 04:53:10,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:53:10,057 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 154 transitions. [2020-12-09 04:53:10,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-09 04:53:10,058 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:53:10,059 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] [2020-12-09 04:53:10,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 04:53:10,059 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:53:10,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:53:10,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1014421384, now seen corresponding path program 1 times [2020-12-09 04:53:10,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:53:10,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15409845] [2020-12-09 04:53:10,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:53:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:53:10,128 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 04:53:10,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15409845] [2020-12-09 04:53:10,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139039092] [2020-12-09 04:53:10,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:53:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:53:10,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 04:53:10,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:53:10,291 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-09 04:53:10,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:53:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-09 04:53:10,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 04:53:10,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 9 [2020-12-09 04:53:10,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603924389] [2020-12-09 04:53:10,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 04:53:10,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:53:10,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 04:53:10,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-09 04:53:10,357 INFO L87 Difference]: Start difference. First operand 111 states and 154 transitions. Second operand 6 states. [2020-12-09 04:53:10,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:53:10,620 INFO L93 Difference]: Finished difference Result 312 states and 467 transitions. [2020-12-09 04:53:10,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 04:53:10,620 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-09 04:53:10,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:53:10,622 INFO L225 Difference]: With dead ends: 312 [2020-12-09 04:53:10,622 INFO L226 Difference]: Without dead ends: 203 [2020-12-09 04:53:10,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-09 04:53:10,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-12-09 04:53:10,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 186. [2020-12-09 04:53:10,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-09 04:53:10,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 255 transitions. [2020-12-09 04:53:10,633 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 255 transitions. Word has length 52 [2020-12-09 04:53:10,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:53:10,633 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 255 transitions. [2020-12-09 04:53:10,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 04:53:10,633 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 255 transitions. [2020-12-09 04:53:10,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-09 04:53:10,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:53:10,635 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] [2020-12-09 04:53:10,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:53:10,836 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:53:10,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:53:10,837 INFO L82 PathProgramCache]: Analyzing trace with hash -675369057, now seen corresponding path program 1 times [2020-12-09 04:53:10,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:53:10,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779847248] [2020-12-09 04:53:10,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:53:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:53:10,881 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-09 04:53:10,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779847248] [2020-12-09 04:53:10,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:53:10,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:53:10,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014353881] [2020-12-09 04:53:10,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:53:10,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:53:10,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:53:10,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:10,883 INFO L87 Difference]: Start difference. First operand 186 states and 255 transitions. Second operand 3 states. [2020-12-09 04:53:10,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:53:10,959 INFO L93 Difference]: Finished difference Result 390 states and 543 transitions. [2020-12-09 04:53:10,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:53:10,959 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-09 04:53:10,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:53:10,961 INFO L225 Difference]: With dead ends: 390 [2020-12-09 04:53:10,961 INFO L226 Difference]: Without dead ends: 207 [2020-12-09 04:53:10,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:10,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-12-09 04:53:10,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2020-12-09 04:53:10,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-12-09 04:53:10,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 277 transitions. [2020-12-09 04:53:10,970 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 277 transitions. Word has length 67 [2020-12-09 04:53:10,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:53:10,971 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 277 transitions. [2020-12-09 04:53:10,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:53:10,971 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 277 transitions. [2020-12-09 04:53:10,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-09 04:53:10,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:53:10,973 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] [2020-12-09 04:53:10,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 04:53:10,973 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:53:10,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:53:10,974 INFO L82 PathProgramCache]: Analyzing trace with hash -861273517, now seen corresponding path program 1 times [2020-12-09 04:53:10,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:53:10,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294886995] [2020-12-09 04:53:10,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:53:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:53:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-09 04:53:11,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294886995] [2020-12-09 04:53:11,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396834803] [2020-12-09 04:53:11,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:53:11,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:53:11,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 04:53:11,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:53:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-12-09 04:53:11,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:53:11,269 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 04:53:11,269 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 04:53:11,312 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-12-09 04:53:11,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2001349311] [2020-12-09 04:53:11,329 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2020-12-09 04:53:11,330 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:53:11,333 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 04:53:11,337 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 04:53:11,338 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 04:53:12,051 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-12-09 04:53:13,027 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:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 04:53:13,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 04:53:13,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 3] total 7 [2020-12-09 04:53:13,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803061159] [2020-12-09 04:53:13,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 04:53:13,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:53:13,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 04:53:13,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-09 04:53:13,030 INFO L87 Difference]: Start difference. First operand 205 states and 277 transitions. Second operand 8 states. [2020-12-09 04:53:13,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:53:13,084 INFO L93 Difference]: Finished difference Result 650 states and 874 transitions. [2020-12-09 04:53:13,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 04:53:13,084 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 85 [2020-12-09 04:53:13,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:53:13,088 INFO L225 Difference]: With dead ends: 650 [2020-12-09 04:53:13,089 INFO L226 Difference]: Without dead ends: 648 [2020-12-09 04:53:13,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-09 04:53:13,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2020-12-09 04:53:13,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 567. [2020-12-09 04:53:13,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2020-12-09 04:53:13,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 776 transitions. [2020-12-09 04:53:13,112 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 776 transitions. Word has length 85 [2020-12-09 04:53:13,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:53:13,112 INFO L481 AbstractCegarLoop]: Abstraction has 567 states and 776 transitions. [2020-12-09 04:53:13,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 04:53:13,113 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 776 transitions. [2020-12-09 04:53:13,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-09 04:53:13,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:53:13,117 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] [2020-12-09 04:53:13,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:53:13,319 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:53:13,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:53:13,320 INFO L82 PathProgramCache]: Analyzing trace with hash 181424121, now seen corresponding path program 1 times [2020-12-09 04:53:13,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:53:13,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135753005] [2020-12-09 04:53:13,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:53:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:53:13,484 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 275 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-09 04:53:13,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135753005] [2020-12-09 04:53:13,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:53:13,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:53:13,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655351025] [2020-12-09 04:53:13,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:53:13,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:53:13,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:53:13,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:13,486 INFO L87 Difference]: Start difference. First operand 567 states and 776 transitions. Second operand 3 states. [2020-12-09 04:53:13,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:53:13,607 INFO L93 Difference]: Finished difference Result 1262 states and 1784 transitions. [2020-12-09 04:53:13,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:53:13,608 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 143 [2020-12-09 04:53:13,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:53:13,611 INFO L225 Difference]: With dead ends: 1262 [2020-12-09 04:53:13,611 INFO L226 Difference]: Without dead ends: 695 [2020-12-09 04:53:13,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:13,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2020-12-09 04:53:13,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 630. [2020-12-09 04:53:13,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 630 states. [2020-12-09 04:53:13,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 860 transitions. [2020-12-09 04:53:13,633 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 860 transitions. Word has length 143 [2020-12-09 04:53:13,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:53:13,634 INFO L481 AbstractCegarLoop]: Abstraction has 630 states and 860 transitions. [2020-12-09 04:53:13,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:53:13,634 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 860 transitions. [2020-12-09 04:53:13,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-09 04:53:13,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:53:13,637 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] [2020-12-09 04:53:13,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-12-09 04:53:13,637 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:53:13,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:53:13,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1334937798, now seen corresponding path program 2 times [2020-12-09 04:53:13,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:53:13,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752167675] [2020-12-09 04:53:13,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:53:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:53:13,697 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 282 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-12-09 04:53:13,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752167675] [2020-12-09 04:53:13,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:53:13,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:53:13,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828115059] [2020-12-09 04:53:13,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:53:13,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:53:13,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:53:13,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:13,699 INFO L87 Difference]: Start difference. First operand 630 states and 860 transitions. Second operand 3 states. [2020-12-09 04:53:13,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:53:13,828 INFO L93 Difference]: Finished difference Result 1450 states and 2062 transitions. [2020-12-09 04:53:13,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:53:13,829 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 152 [2020-12-09 04:53:13,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:53:13,833 INFO L225 Difference]: With dead ends: 1450 [2020-12-09 04:53:13,833 INFO L226 Difference]: Without dead ends: 772 [2020-12-09 04:53:13,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:13,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2020-12-09 04:53:13,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 744. [2020-12-09 04:53:13,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2020-12-09 04:53:13,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1004 transitions. [2020-12-09 04:53:13,857 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1004 transitions. Word has length 152 [2020-12-09 04:53:13,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:53:13,857 INFO L481 AbstractCegarLoop]: Abstraction has 744 states and 1004 transitions. [2020-12-09 04:53:13,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:53:13,857 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1004 transitions. [2020-12-09 04:53:13,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-09 04:53:13,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:53:13,859 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] [2020-12-09 04:53:13,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-12-09 04:53:13,859 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:53:13,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:53:13,860 INFO L82 PathProgramCache]: Analyzing trace with hash -328772088, now seen corresponding path program 1 times [2020-12-09 04:53:13,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:53:13,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30342669] [2020-12-09 04:53:13,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:53:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:53:13,944 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 376 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-12-09 04:53:13,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30342669] [2020-12-09 04:53:13,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:53:13,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:53:13,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797710437] [2020-12-09 04:53:13,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:53:13,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:53:13,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:53:13,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:13,945 INFO L87 Difference]: Start difference. First operand 744 states and 1004 transitions. Second operand 3 states. [2020-12-09 04:53:13,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:53:13,968 INFO L93 Difference]: Finished difference Result 1227 states and 1658 transitions. [2020-12-09 04:53:13,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:53:13,969 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 163 [2020-12-09 04:53:13,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:53:13,972 INFO L225 Difference]: With dead ends: 1227 [2020-12-09 04:53:13,972 INFO L226 Difference]: Without dead ends: 744 [2020-12-09 04:53:13,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:13,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2020-12-09 04:53:13,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2020-12-09 04:53:13,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2020-12-09 04:53:13,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1002 transitions. [2020-12-09 04:53:13,990 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1002 transitions. Word has length 163 [2020-12-09 04:53:13,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:53:13,990 INFO L481 AbstractCegarLoop]: Abstraction has 744 states and 1002 transitions. [2020-12-09 04:53:13,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:53:13,990 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1002 transitions. [2020-12-09 04:53:13,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-09 04:53:13,992 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:53:13,992 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] [2020-12-09 04:53:13,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-12-09 04:53:13,992 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:53:13,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:53:13,993 INFO L82 PathProgramCache]: Analyzing trace with hash -62901987, now seen corresponding path program 1 times [2020-12-09 04:53:13,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:53:13,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303639971] [2020-12-09 04:53:13,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:53:14,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 04:53:14,021 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 04:53:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 04:53:14,055 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 04:53:14,110 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 04:53:14,110 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 04:53:14,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-12-09 04:53:14,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:53:14 BoogieIcfgContainer [2020-12-09 04:53:14,197 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 04:53:14,197 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 04:53:14,197 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 04:53:14,197 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 04:53:14,197 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:53:09" (3/4) ... [2020-12-09 04:53:14,200 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 04:53:14,200 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 04:53:14,200 INFO L168 Benchmark]: Toolchain (without parser) took 5886.15 ms. Allocated memory was 100.7 MB in the beginning and 211.8 MB in the end (delta: 111.1 MB). Free memory was 63.9 MB in the beginning and 112.5 MB in the end (delta: -48.6 MB). Peak memory consumption was 63.3 MB. Max. memory is 16.1 GB. [2020-12-09 04:53:14,201 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 100.7 MB. Free memory is still 80.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:53:14,201 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.83 ms. Allocated memory is still 100.7 MB. Free memory was 63.7 MB in the beginning and 73.3 MB in the end (delta: -9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 04:53:14,202 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.96 ms. Allocated memory is still 100.7 MB. Free memory was 73.3 MB in the beginning and 70.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:53:14,202 INFO L168 Benchmark]: Boogie Preprocessor took 26.50 ms. Allocated memory is still 100.7 MB. Free memory was 70.8 MB in the beginning and 68.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:53:14,202 INFO L168 Benchmark]: RCFGBuilder took 750.05 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 68.7 MB in the beginning and 86.5 MB in the end (delta: -17.8 MB). Peak memory consumption was 50.7 MB. Max. memory is 16.1 GB. [2020-12-09 04:53:14,203 INFO L168 Benchmark]: TraceAbstraction took 4782.45 ms. Allocated memory was 121.6 MB in the beginning and 211.8 MB in the end (delta: 90.2 MB). Free memory was 85.6 MB in the beginning and 113.5 MB in the end (delta: -27.9 MB). Peak memory consumption was 63.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:53:14,203 INFO L168 Benchmark]: Witness Printer took 2.77 ms. Allocated memory is still 211.8 MB. Free memory was 113.5 MB in the beginning and 112.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:53:14,205 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 100.7 MB. Free memory is still 80.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 280.83 ms. Allocated memory is still 100.7 MB. Free memory was 63.7 MB in the beginning and 73.3 MB in the end (delta: -9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.96 ms. Allocated memory is still 100.7 MB. Free memory was 73.3 MB in the beginning and 70.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.50 ms. Allocated memory is still 100.7 MB. Free memory was 70.8 MB in the beginning and 68.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 750.05 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 68.7 MB in the beginning and 86.5 MB in the end (delta: -17.8 MB). Peak memory consumption was 50.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4782.45 ms. Allocated memory was 121.6 MB in the beginning and 211.8 MB in the end (delta: 90.2 MB). Free memory was 85.6 MB in the beginning and 113.5 MB in the end (delta: -27.9 MB). Peak memory consumption was 63.1 MB. Max. memory is 16.1 GB. * Witness Printer took 2.77 ms. Allocated memory is still 211.8 MB. Free memory was 113.5 MB in the beginning and 112.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 609]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is 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 = __VERIFIER_nondet_int(); [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 = __VERIFIER_nondet_uint(); [L28] unsigned int s__ctx__stats__sess_connect = __VERIFIER_nondet_uint(); [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 = __VERIFIER_nondet_int(); [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 = __VERIFIER_nondet_int(); [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 [L609] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 84 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.6s, OverallIterations: 10, TraceHistogramMax: 11, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1223 SDtfs, 754 SDslu, 1098 SDs, 0 SdLazy, 895 SolverSat, 211 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 299 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=744occurred 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, 197 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 1049 NumberOfCodeBlocks, 1049 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 1009 ConstructedInterpolants, 0 QuantifiedInterpolants, 309017 SizeOfPredicates, 2 NumberOfNonLiveVariables, 432 ConjunctsInSsa, 9 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 0.2.0-7b2dab5 [2020-12-09 04:53:15,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 04:53:15,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 04:53:15,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 04:53:15,846 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 04:53:15,847 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 04:53:15,849 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 04:53:15,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 04:53:15,852 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 04:53:15,853 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 04:53:15,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 04:53:15,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 04:53:15,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 04:53:15,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 04:53:15,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 04:53:15,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 04:53:15,859 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 04:53:15,860 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 04:53:15,861 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 04:53:15,863 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 04:53:15,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 04:53:15,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 04:53:15,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 04:53:15,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 04:53:15,870 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 04:53:15,870 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 04:53:15,871 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 04:53:15,871 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 04:53:15,872 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 04:53:15,873 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 04:53:15,873 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 04:53:15,874 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 04:53:15,874 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 04:53:15,875 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 04:53:15,876 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 04:53:15,876 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 04:53:15,877 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 04:53:15,877 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 04:53:15,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 04:53:15,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 04:53:15,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 04:53:15,880 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 04:53:15,897 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 04:53:15,897 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 04:53:15,897 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 04:53:15,897 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 04:53:15,898 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 04:53:15,898 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 04:53:15,898 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 04:53:15,898 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 04:53:15,898 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 04:53:15,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 04:53:15,899 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 04:53:15,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 04:53:15,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 04:53:15,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 04:53:15,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 04:53:15,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 04:53:15,899 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 04:53:15,899 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 04:53:15,900 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 04:53:15,900 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 04:53:15,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 04:53:15,900 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 04:53:15,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 04:53:15,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 04:53:15,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 04:53:15,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 04:53:15,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:53:15,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 04:53:15,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 04:53:15,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 04:53:15,901 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 04:53:15,901 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 04:53:15,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 04:53:15,901 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 04:53:15,901 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 04:53:15,901 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_94aef366-3a5f-4a13-a6b0-818f164220f0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a92f0f2e799b323440c6f0b05c6a9c0af057fa0c [2020-12-09 04:53:16,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 04:53:16,161 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 04:53:16,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 04:53:16,164 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 04:53:16,164 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 04:53:16,165 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c [2020-12-09 04:53:16,206 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/data/fcc7923a5/c5efe9e4e1904ef683687234d2238b0c/FLAG1c6bdff6f [2020-12-09 04:53:16,675 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 04:53:16,675 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c [2020-12-09 04:53:16,686 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/data/fcc7923a5/c5efe9e4e1904ef683687234d2238b0c/FLAG1c6bdff6f [2020-12-09 04:53:17,209 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/data/fcc7923a5/c5efe9e4e1904ef683687234d2238b0c [2020-12-09 04:53:17,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 04:53:17,220 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 04:53:17,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 04:53:17,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 04:53:17,231 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 04:53:17,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:53:17" (1/1) ... [2020-12-09 04:53:17,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@246ac7e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:53:17, skipping insertion in model container [2020-12-09 04:53:17,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:53:17" (1/1) ... [2020-12-09 04:53:17,237 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 04:53:17,261 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 04:53:17,387 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c[37311,37324] [2020-12-09 04:53:17,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:53:17,400 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 04:53:17,447 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c[37311,37324] [2020-12-09 04:53:17,449 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:53:17,459 INFO L208 MainTranslator]: Completed translation [2020-12-09 04:53:17,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:53:17 WrapperNode [2020-12-09 04:53:17,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 04:53:17,460 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 04:53:17,460 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 04:53:17,460 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 04:53:17,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:53:17" (1/1) ... [2020-12-09 04:53:17,473 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:53:17" (1/1) ... [2020-12-09 04:53:17,494 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 04:53:17,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 04:53:17,494 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 04:53:17,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 04:53:17,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:53:17" (1/1) ... [2020-12-09 04:53:17,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:53:17" (1/1) ... [2020-12-09 04:53:17,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:53:17" (1/1) ... [2020-12-09 04:53:17,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:53:17" (1/1) ... [2020-12-09 04:53:17,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:53:17" (1/1) ... [2020-12-09 04:53:17,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:53:17" (1/1) ... [2020-12-09 04:53:17,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:53:17" (1/1) ... [2020-12-09 04:53:17,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 04:53:17,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 04:53:17,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 04:53:17,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 04:53:17,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:53:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:53:17,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 04:53:17,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 04:53:17,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 04:53:17,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 04:53:17,652 WARN L800 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-12-09 04:53:17,973 INFO L752 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2020-12-09 04:53:17,974 INFO L752 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2020-12-09 04:53:17,982 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 04:53:17,982 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 04:53:17,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:53:17 BoogieIcfgContainer [2020-12-09 04:53:17,984 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 04:53:17,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 04:53:17,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 04:53:17,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 04:53:17,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:53:17" (1/3) ... [2020-12-09 04:53:17,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a27d2ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:53:17, skipping insertion in model container [2020-12-09 04:53:17,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:53:17" (2/3) ... [2020-12-09 04:53:17,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a27d2ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:53:17, skipping insertion in model container [2020-12-09 04:53:17,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:53:17" (3/3) ... [2020-12-09 04:53:17,991 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_2.BV.c.cil-2a.c [2020-12-09 04:53:18,004 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 04:53:18,007 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 04:53:18,023 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 04:53:18,047 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 04:53:18,048 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 04:53:18,048 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 04:53:18,048 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 04:53:18,048 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 04:53:18,048 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 04:53:18,048 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 04:53:18,048 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 04:53:18,061 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states. [2020-12-09 04:53:18,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-09 04:53:18,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:53:18,067 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] [2020-12-09 04:53:18,067 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:53:18,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:53:18,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1457697026, now seen corresponding path program 1 times [2020-12-09 04:53:18,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:53:18,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554514728] [2020-12-09 04:53:18,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 04:53:18,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:53:18,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 04:53:18,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:53:18,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:53:18,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:53:18,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554514728] [2020-12-09 04:53:18,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:53:18,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:53:18,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293351999] [2020-12-09 04:53:18,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:53:18,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:53:18,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:53:18,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:18,243 INFO L87 Difference]: Start difference. First operand 125 states. Second operand 3 states. [2020-12-09 04:53:18,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:53:18,382 INFO L93 Difference]: Finished difference Result 246 states and 421 transitions. [2020-12-09 04:53:18,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:53:18,383 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-12-09 04:53:18,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:53:18,392 INFO L225 Difference]: With dead ends: 246 [2020-12-09 04:53:18,392 INFO L226 Difference]: Without dead ends: 112 [2020-12-09 04:53:18,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:18,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-09 04:53:18,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-12-09 04:53:18,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-09 04:53:18,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 169 transitions. [2020-12-09 04:53:18,429 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 169 transitions. Word has length 24 [2020-12-09 04:53:18,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:53:18,430 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 169 transitions. [2020-12-09 04:53:18,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:53:18,430 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 169 transitions. [2020-12-09 04:53:18,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-09 04:53:18,431 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:53:18,431 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] [2020-12-09 04:53:18,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 04:53:18,633 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:53:18,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:53:18,634 INFO L82 PathProgramCache]: Analyzing trace with hash -611475394, now seen corresponding path program 1 times [2020-12-09 04:53:18,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:53:18,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [861779483] [2020-12-09 04:53:18,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 04:53:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:53:18,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 04:53:18,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:53:18,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:53:18,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:53:18,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [861779483] [2020-12-09 04:53:18,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:53:18,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:53:18,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043631189] [2020-12-09 04:53:18,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:53:18,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:53:18,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:53:18,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:18,807 INFO L87 Difference]: Start difference. First operand 112 states and 169 transitions. Second operand 3 states. [2020-12-09 04:53:18,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:53:18,920 INFO L93 Difference]: Finished difference Result 233 states and 356 transitions. [2020-12-09 04:53:18,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:53:18,921 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-12-09 04:53:18,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:53:18,923 INFO L225 Difference]: With dead ends: 233 [2020-12-09 04:53:18,923 INFO L226 Difference]: Without dead ends: 131 [2020-12-09 04:53:18,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:18,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-09 04:53:18,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2020-12-09 04:53:18,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-09 04:53:18,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 189 transitions. [2020-12-09 04:53:18,935 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 189 transitions. Word has length 36 [2020-12-09 04:53:18,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:53:18,936 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 189 transitions. [2020-12-09 04:53:18,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:53:18,936 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 189 transitions. [2020-12-09 04:53:18,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-09 04:53:18,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:53:18,937 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] [2020-12-09 04:53:19,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 04:53:19,139 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:53:19,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:53:19,141 INFO L82 PathProgramCache]: Analyzing trace with hash 213639527, now seen corresponding path program 1 times [2020-12-09 04:53:19,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:53:19,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1118155388] [2020-12-09 04:53:19,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 04:53:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:53:19,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 04:53:19,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:53:19,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 04:53:19,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:53:19,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1118155388] [2020-12-09 04:53:19,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:53:19,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:53:19,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624003091] [2020-12-09 04:53:19,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:53:19,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:53:19,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:53:19,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:19,373 INFO L87 Difference]: Start difference. First operand 127 states and 189 transitions. Second operand 3 states. [2020-12-09 04:53:19,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:53:19,478 INFO L93 Difference]: Finished difference Result 265 states and 400 transitions. [2020-12-09 04:53:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:53:19,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-12-09 04:53:19,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:53:19,480 INFO L225 Difference]: With dead ends: 265 [2020-12-09 04:53:19,480 INFO L226 Difference]: Without dead ends: 148 [2020-12-09 04:53:19,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:19,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-12-09 04:53:19,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2020-12-09 04:53:19,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-09 04:53:19,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 211 transitions. [2020-12-09 04:53:19,488 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 211 transitions. Word has length 50 [2020-12-09 04:53:19,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:53:19,488 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 211 transitions. [2020-12-09 04:53:19,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:53:19,488 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 211 transitions. [2020-12-09 04:53:19,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-09 04:53:19,490 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:53:19,490 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] [2020-12-09 04:53:19,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 04:53:19,692 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:53:19,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:53:19,693 INFO L82 PathProgramCache]: Analyzing trace with hash 370823208, now seen corresponding path program 1 times [2020-12-09 04:53:19,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:53:19,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930567610] [2020-12-09 04:53:19,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-09 04:53:19,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:53:19,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 04:53:19,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:53:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-09 04:53:19,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:53:19,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930567610] [2020-12-09 04:53:19,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:53:19,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:53:19,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387625383] [2020-12-09 04:53:19,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:53:19,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:53:19,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:53:19,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:19,845 INFO L87 Difference]: Start difference. First operand 144 states and 211 transitions. Second operand 3 states. [2020-12-09 04:53:19,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:53:19,974 INFO L93 Difference]: Finished difference Result 321 states and 487 transitions. [2020-12-09 04:53:19,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:53:19,974 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-09 04:53:19,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:53:19,975 INFO L225 Difference]: With dead ends: 321 [2020-12-09 04:53:19,976 INFO L226 Difference]: Without dead ends: 187 [2020-12-09 04:53:19,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:19,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-09 04:53:19,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2020-12-09 04:53:19,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-09 04:53:19,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 256 transitions. [2020-12-09 04:53:19,984 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 256 transitions. Word has length 67 [2020-12-09 04:53:19,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:53:19,984 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 256 transitions. [2020-12-09 04:53:19,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:53:19,985 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 256 transitions. [2020-12-09 04:53:19,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-09 04:53:19,986 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:53:19,986 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] [2020-12-09 04:53:20,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-09 04:53:20,188 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:53:20,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:53:20,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1434615126, now seen corresponding path program 1 times [2020-12-09 04:53:20,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:53:20,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [922242653] [2020-12-09 04:53:20,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-09 04:53:20,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:53:20,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 04:53:20,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:53:20,354 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-09 04:53:20,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:53:20,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [922242653] [2020-12-09 04:53:20,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:53:20,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:53:20,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184530969] [2020-12-09 04:53:20,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:53:20,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:53:20,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:53:20,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:20,355 INFO L87 Difference]: Start difference. First operand 184 states and 256 transitions. Second operand 3 states. [2020-12-09 04:53:20,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:53:20,453 INFO L93 Difference]: Finished difference Result 381 states and 538 transitions. [2020-12-09 04:53:20,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:53:20,454 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-09 04:53:20,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:53:20,455 INFO L225 Difference]: With dead ends: 381 [2020-12-09 04:53:20,455 INFO L226 Difference]: Without dead ends: 207 [2020-12-09 04:53:20,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:20,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-12-09 04:53:20,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 203. [2020-12-09 04:53:20,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-12-09 04:53:20,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 280 transitions. [2020-12-09 04:53:20,466 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 280 transitions. Word has length 67 [2020-12-09 04:53:20,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:53:20,466 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 280 transitions. [2020-12-09 04:53:20,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:53:20,466 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 280 transitions. [2020-12-09 04:53:20,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-09 04:53:20,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:53:20,469 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] [2020-12-09 04:53:20,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-09 04:53:20,670 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:53:20,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:53:20,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1023824768, now seen corresponding path program 1 times [2020-12-09 04:53:20,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:53:20,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [634666234] [2020-12-09 04:53:20,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-09 04:53:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:53:20,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 04:53:20,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:53:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-09 04:53:20,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:53:20,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [634666234] [2020-12-09 04:53:20,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:53:20,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:53:20,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113749836] [2020-12-09 04:53:20,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:53:20,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:53:20,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:53:20,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:20,844 INFO L87 Difference]: Start difference. First operand 203 states and 280 transitions. Second operand 3 states. [2020-12-09 04:53:20,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:53:20,930 INFO L93 Difference]: Finished difference Result 420 states and 588 transitions. [2020-12-09 04:53:20,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:53:20,930 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-09 04:53:20,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:53:20,932 INFO L225 Difference]: With dead ends: 420 [2020-12-09 04:53:20,932 INFO L226 Difference]: Without dead ends: 227 [2020-12-09 04:53:20,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:20,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-12-09 04:53:20,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2020-12-09 04:53:20,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-12-09 04:53:20,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 306 transitions. [2020-12-09 04:53:20,937 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 306 transitions. Word has length 83 [2020-12-09 04:53:20,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:53:20,938 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 306 transitions. [2020-12-09 04:53:20,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:53:20,938 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 306 transitions. [2020-12-09 04:53:20,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-09 04:53:20,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:53:20,940 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] [2020-12-09 04:53:21,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-09 04:53:21,142 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:53:21,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:53:21,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1619803512, now seen corresponding path program 1 times [2020-12-09 04:53:21,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:53:21,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935401768] [2020-12-09 04:53:21,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-12-09 04:53:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:53:21,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 04:53:21,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:53:21,286 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-09 04:53:21,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:53:21,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935401768] [2020-12-09 04:53:21,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:53:21,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:53:21,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678795190] [2020-12-09 04:53:21,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:53:21,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:53:21,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:53:21,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:21,288 INFO L87 Difference]: Start difference. First operand 224 states and 306 transitions. Second operand 3 states. [2020-12-09 04:53:21,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:53:21,316 INFO L93 Difference]: Finished difference Result 649 states and 888 transitions. [2020-12-09 04:53:21,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:53:21,316 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 103 [2020-12-09 04:53:21,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:53:21,319 INFO L225 Difference]: With dead ends: 649 [2020-12-09 04:53:21,319 INFO L226 Difference]: Without dead ends: 435 [2020-12-09 04:53:21,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:21,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2020-12-09 04:53:21,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 435. [2020-12-09 04:53:21,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-12-09 04:53:21,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 590 transitions. [2020-12-09 04:53:21,329 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 590 transitions. Word has length 103 [2020-12-09 04:53:21,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:53:21,329 INFO L481 AbstractCegarLoop]: Abstraction has 435 states and 590 transitions. [2020-12-09 04:53:21,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:53:21,329 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 590 transitions. [2020-12-09 04:53:21,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-09 04:53:21,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:53:21,331 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] [2020-12-09 04:53:21,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-12-09 04:53:21,532 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:53:21,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:53:21,534 INFO L82 PathProgramCache]: Analyzing trace with hash -713589126, now seen corresponding path program 1 times [2020-12-09 04:53:21,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:53:21,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [804386889] [2020-12-09 04:53:21,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/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 [2020-12-09 04:53:21,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:53:21,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 04:53:21,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:53:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-09 04:53:21,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:53:21,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [804386889] [2020-12-09 04:53:21,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:53:21,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:53:21,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837185406] [2020-12-09 04:53:21,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:53:21,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:53:21,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:53:21,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:21,715 INFO L87 Difference]: Start difference. First operand 435 states and 590 transitions. Second operand 3 states. [2020-12-09 04:53:21,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:53:21,739 INFO L93 Difference]: Finished difference Result 881 states and 1194 transitions. [2020-12-09 04:53:21,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:53:21,739 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 103 [2020-12-09 04:53:21,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:53:21,741 INFO L225 Difference]: With dead ends: 881 [2020-12-09 04:53:21,741 INFO L226 Difference]: Without dead ends: 456 [2020-12-09 04:53:21,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:21,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-12-09 04:53:21,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 456. [2020-12-09 04:53:21,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-12-09 04:53:21,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 617 transitions. [2020-12-09 04:53:21,752 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 617 transitions. Word has length 103 [2020-12-09 04:53:21,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:53:21,752 INFO L481 AbstractCegarLoop]: Abstraction has 456 states and 617 transitions. [2020-12-09 04:53:21,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:53:21,752 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 617 transitions. [2020-12-09 04:53:21,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-09 04:53:21,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:53:21,753 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] [2020-12-09 04:53:21,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-12-09 04:53:21,955 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:53:21,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:53:21,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1034569449, now seen corresponding path program 1 times [2020-12-09 04:53:21,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:53:21,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72998295] [2020-12-09 04:53:21,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/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 [2020-12-09 04:53:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:53:22,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 04:53:22,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:53:22,143 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-12-09 04:53:22,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:53:22,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72998295] [2020-12-09 04:53:22,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:53:22,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:53:22,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167912471] [2020-12-09 04:53:22,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:53:22,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:53:22,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:53:22,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:22,144 INFO L87 Difference]: Start difference. First operand 456 states and 617 transitions. Second operand 3 states. [2020-12-09 04:53:22,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:53:22,162 INFO L93 Difference]: Finished difference Result 928 states and 1254 transitions. [2020-12-09 04:53:22,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:53:22,163 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 104 [2020-12-09 04:53:22,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:53:22,165 INFO L225 Difference]: With dead ends: 928 [2020-12-09 04:53:22,165 INFO L226 Difference]: Without dead ends: 482 [2020-12-09 04:53:22,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:22,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2020-12-09 04:53:22,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 482. [2020-12-09 04:53:22,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 482 states. [2020-12-09 04:53:22,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 650 transitions. [2020-12-09 04:53:22,176 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 650 transitions. Word has length 104 [2020-12-09 04:53:22,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:53:22,176 INFO L481 AbstractCegarLoop]: Abstraction has 482 states and 650 transitions. [2020-12-09 04:53:22,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:53:22,176 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 650 transitions. [2020-12-09 04:53:22,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-09 04:53:22,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:53:22,177 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] [2020-12-09 04:53:22,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2020-12-09 04:53:22,379 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:53:22,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:53:22,380 INFO L82 PathProgramCache]: Analyzing trace with hash -53319870, now seen corresponding path program 1 times [2020-12-09 04:53:22,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:53:22,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [878297142] [2020-12-09 04:53:22,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2020-12-09 04:53:22,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:53:22,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 04:53:22,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:53:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-12-09 04:53:22,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:53:22,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [878297142] [2020-12-09 04:53:22,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:53:22,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:53:22,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307881127] [2020-12-09 04:53:22,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:53:22,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:53:22,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:53:22,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:22,623 INFO L87 Difference]: Start difference. First operand 482 states and 650 transitions. Second operand 3 states. [2020-12-09 04:53:22,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:53:22,658 INFO L93 Difference]: Finished difference Result 1121 states and 1519 transitions. [2020-12-09 04:53:22,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:53:22,658 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2020-12-09 04:53:22,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:53:22,661 INFO L225 Difference]: With dead ends: 1121 [2020-12-09 04:53:22,661 INFO L226 Difference]: Without dead ends: 675 [2020-12-09 04:53:22,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:22,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2020-12-09 04:53:22,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 675. [2020-12-09 04:53:22,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 675 states. [2020-12-09 04:53:22,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 910 transitions. [2020-12-09 04:53:22,677 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 910 transitions. Word has length 105 [2020-12-09 04:53:22,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:53:22,677 INFO L481 AbstractCegarLoop]: Abstraction has 675 states and 910 transitions. [2020-12-09 04:53:22,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:53:22,677 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 910 transitions. [2020-12-09 04:53:22,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-09 04:53:22,678 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:53:22,679 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] [2020-12-09 04:53:22,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2020-12-09 04:53:22,880 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:53:22,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:53:22,880 INFO L82 PathProgramCache]: Analyzing trace with hash -187333376, now seen corresponding path program 1 times [2020-12-09 04:53:22,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:53:22,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135167691] [2020-12-09 04:53:22,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/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 [2020-12-09 04:53:22,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:53:22,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 04:53:22,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:53:23,013 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-09 04:53:23,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:53:23,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135167691] [2020-12-09 04:53:23,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:53:23,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:53:23,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554779663] [2020-12-09 04:53:23,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:53:23,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:53:23,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:53:23,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:23,014 INFO L87 Difference]: Start difference. First operand 675 states and 910 transitions. Second operand 3 states. [2020-12-09 04:53:23,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:53:23,045 INFO L93 Difference]: Finished difference Result 1339 states and 1804 transitions. [2020-12-09 04:53:23,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:53:23,046 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2020-12-09 04:53:23,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:53:23,050 INFO L225 Difference]: With dead ends: 1339 [2020-12-09 04:53:23,050 INFO L226 Difference]: Without dead ends: 700 [2020-12-09 04:53:23,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:23,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2020-12-09 04:53:23,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 700. [2020-12-09 04:53:23,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2020-12-09 04:53:23,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 940 transitions. [2020-12-09 04:53:23,068 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 940 transitions. Word has length 105 [2020-12-09 04:53:23,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:53:23,068 INFO L481 AbstractCegarLoop]: Abstraction has 700 states and 940 transitions. [2020-12-09 04:53:23,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:53:23,068 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 940 transitions. [2020-12-09 04:53:23,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-09 04:53:23,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:53:23,070 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] [2020-12-09 04:53:23,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 mathsat -unsat_core_generation=3 [2020-12-09 04:53:23,271 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:53:23,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:53:23,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1519363111, now seen corresponding path program 1 times [2020-12-09 04:53:23,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:53:23,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360278922] [2020-12-09 04:53:23,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/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 [2020-12-09 04:53:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:53:23,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 04:53:23,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:53:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-12-09 04:53:23,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:53:23,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360278922] [2020-12-09 04:53:23,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:53:23,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:53:23,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904072884] [2020-12-09 04:53:23,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:53:23,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:53:23,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:53:23,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:23,438 INFO L87 Difference]: Start difference. First operand 700 states and 940 transitions. Second operand 3 states. [2020-12-09 04:53:23,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:53:23,567 INFO L93 Difference]: Finished difference Result 1444 states and 1970 transitions. [2020-12-09 04:53:23,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:53:23,568 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 173 [2020-12-09 04:53:23,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:53:23,571 INFO L225 Difference]: With dead ends: 1444 [2020-12-09 04:53:23,571 INFO L226 Difference]: Without dead ends: 780 [2020-12-09 04:53:23,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:23,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2020-12-09 04:53:23,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 769. [2020-12-09 04:53:23,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 769 states. [2020-12-09 04:53:23,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1024 transitions. [2020-12-09 04:53:23,586 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1024 transitions. Word has length 173 [2020-12-09 04:53:23,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:53:23,586 INFO L481 AbstractCegarLoop]: Abstraction has 769 states and 1024 transitions. [2020-12-09 04:53:23,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:53:23,586 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1024 transitions. [2020-12-09 04:53:23,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-12-09 04:53:23,588 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:53:23,588 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] [2020-12-09 04:53:23,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3 [2020-12-09 04:53:23,789 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:53:23,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:53:23,790 INFO L82 PathProgramCache]: Analyzing trace with hash -759567935, now seen corresponding path program 1 times [2020-12-09 04:53:23,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:53:23,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1353897716] [2020-12-09 04:53:23,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2020-12-09 04:53:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:53:23,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 04:53:23,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:53:24,022 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-12-09 04:53:24,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:53:24,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1353897716] [2020-12-09 04:53:24,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:53:24,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:53:24,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094420514] [2020-12-09 04:53:24,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:53:24,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:53:24,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:53:24,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:24,024 INFO L87 Difference]: Start difference. First operand 769 states and 1024 transitions. Second operand 3 states. [2020-12-09 04:53:24,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:53:24,051 INFO L93 Difference]: Finished difference Result 1734 states and 2312 transitions. [2020-12-09 04:53:24,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:53:24,051 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 194 [2020-12-09 04:53:24,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:53:24,057 INFO L225 Difference]: With dead ends: 1734 [2020-12-09 04:53:24,057 INFO L226 Difference]: Without dead ends: 1001 [2020-12-09 04:53:24,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:24,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2020-12-09 04:53:24,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 1001. [2020-12-09 04:53:24,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1001 states. [2020-12-09 04:53:24,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1332 transitions. [2020-12-09 04:53:24,092 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1332 transitions. Word has length 194 [2020-12-09 04:53:24,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:53:24,092 INFO L481 AbstractCegarLoop]: Abstraction has 1001 states and 1332 transitions. [2020-12-09 04:53:24,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:53:24,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1332 transitions. [2020-12-09 04:53:24,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-12-09 04:53:24,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:53:24,096 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 7, 7, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:53:24,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 mathsat -unsat_core_generation=3 [2020-12-09 04:53:24,297 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:53:24,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:53:24,297 INFO L82 PathProgramCache]: Analyzing trace with hash -915330113, now seen corresponding path program 1 times [2020-12-09 04:53:24,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:53:24,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1753627649] [2020-12-09 04:53:24,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2020-12-09 04:53:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:53:24,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 04:53:24,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:53:24,499 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2020-12-09 04:53:24,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:53:24,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1753627649] [2020-12-09 04:53:24,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:53:24,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:53:24,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481027979] [2020-12-09 04:53:24,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:53:24,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:53:24,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:53:24,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:24,500 INFO L87 Difference]: Start difference. First operand 1001 states and 1332 transitions. Second operand 3 states. [2020-12-09 04:53:24,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:53:24,529 INFO L93 Difference]: Finished difference Result 2498 states and 3353 transitions. [2020-12-09 04:53:24,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:53:24,530 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 196 [2020-12-09 04:53:24,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:53:24,536 INFO L225 Difference]: With dead ends: 2498 [2020-12-09 04:53:24,536 INFO L226 Difference]: Without dead ends: 1554 [2020-12-09 04:53:24,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:24,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2020-12-09 04:53:24,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1552. [2020-12-09 04:53:24,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1552 states. [2020-12-09 04:53:24,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 2082 transitions. [2020-12-09 04:53:24,564 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 2082 transitions. Word has length 196 [2020-12-09 04:53:24,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:53:24,564 INFO L481 AbstractCegarLoop]: Abstraction has 1552 states and 2082 transitions. [2020-12-09 04:53:24,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:53:24,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 2082 transitions. [2020-12-09 04:53:24,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-12-09 04:53:24,567 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:53:24,567 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 7, 7, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:53:24,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 mathsat -unsat_core_generation=3 [2020-12-09 04:53:24,768 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:53:24,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:53:24,769 INFO L82 PathProgramCache]: Analyzing trace with hash 890108221, now seen corresponding path program 1 times [2020-12-09 04:53:24,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:53:24,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [922667720] [2020-12-09 04:53:24,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2020-12-09 04:53:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:53:24,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 04:53:24,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:53:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2020-12-09 04:53:25,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:53:25,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [922667720] [2020-12-09 04:53:25,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:53:25,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:53:25,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030002864] [2020-12-09 04:53:25,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:53:25,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:53:25,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:53:25,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:25,088 INFO L87 Difference]: Start difference. First operand 1552 states and 2082 transitions. Second operand 3 states. [2020-12-09 04:53:25,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:53:25,114 INFO L93 Difference]: Finished difference Result 2420 states and 3232 transitions. [2020-12-09 04:53:25,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:53:25,115 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 196 [2020-12-09 04:53:25,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:53:25,120 INFO L225 Difference]: With dead ends: 2420 [2020-12-09 04:53:25,120 INFO L226 Difference]: Without dead ends: 1556 [2020-12-09 04:53:25,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:53:25,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2020-12-09 04:53:25,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1554. [2020-12-09 04:53:25,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1554 states. [2020-12-09 04:53:25,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 2075 transitions. [2020-12-09 04:53:25,148 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 2075 transitions. Word has length 196 [2020-12-09 04:53:25,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:53:25,148 INFO L481 AbstractCegarLoop]: Abstraction has 1554 states and 2075 transitions. [2020-12-09 04:53:25,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:53:25,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 2075 transitions. [2020-12-09 04:53:25,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-12-09 04:53:25,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:53:25,151 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] [2020-12-09 04:53:25,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 mathsat -unsat_core_generation=3 [2020-12-09 04:53:25,352 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:53:25,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:53:25,353 INFO L82 PathProgramCache]: Analyzing trace with hash 342847369, now seen corresponding path program 1 times [2020-12-09 04:53:25,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:53:25,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1417923962] [2020-12-09 04:53:25,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/mathsat Starting monitored process 17 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with mathsat -unsat_core_generation=3 [2020-12-09 04:53:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 04:53:25,465 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 04:53:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 04:53:25,535 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 04:53:25,707 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 04:53:25,707 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 04:53:25,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 mathsat -unsat_core_generation=3 [2020-12-09 04:53:26,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:53:26 BoogieIcfgContainer [2020-12-09 04:53:26,019 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 04:53:26,020 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 04:53:26,020 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 04:53:26,020 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 04:53:26,020 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:53:17" (3/4) ... [2020-12-09 04:53:26,021 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 04:53:26,113 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_94aef366-3a5f-4a13-a6b0-818f164220f0/bin/utaipan/witness.graphml [2020-12-09 04:53:26,114 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 04:53:26,115 INFO L168 Benchmark]: Toolchain (without parser) took 8894.33 ms. Allocated memory was 71.3 MB in the beginning and 130.0 MB in the end (delta: 58.7 MB). Free memory was 54.4 MB in the beginning and 44.2 MB in the end (delta: 10.2 MB). Peak memory consumption was 67.7 MB. Max. memory is 16.1 GB. [2020-12-09 04:53:26,115 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 71.3 MB. Free memory is still 54.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:53:26,115 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.11 ms. Allocated memory is still 71.3 MB. Free memory was 54.4 MB in the beginning and 52.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 04:53:26,116 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.72 ms. Allocated memory is still 71.3 MB. Free memory was 52.6 MB in the beginning and 50.3 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:53:26,116 INFO L168 Benchmark]: Boogie Preprocessor took 26.77 ms. Allocated memory is still 71.3 MB. Free memory was 49.9 MB in the beginning and 48.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:53:26,116 INFO L168 Benchmark]: RCFGBuilder took 462.75 ms. Allocated memory was 71.3 MB in the beginning and 88.1 MB in the end (delta: 16.8 MB). Free memory was 47.9 MB in the beginning and 43.3 MB in the end (delta: 4.6 MB). Peak memory consumption was 23.3 MB. Max. memory is 16.1 GB. [2020-12-09 04:53:26,116 INFO L168 Benchmark]: TraceAbstraction took 8033.39 ms. Allocated memory was 88.1 MB in the beginning and 130.0 MB in the end (delta: 41.9 MB). Free memory was 42.8 MB in the beginning and 65.1 MB in the end (delta: -22.3 MB). Peak memory consumption was 18.0 MB. Max. memory is 16.1 GB. [2020-12-09 04:53:26,117 INFO L168 Benchmark]: Witness Printer took 94.19 ms. Allocated memory is still 130.0 MB. Free memory was 65.1 MB in the beginning and 44.2 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-09 04:53:26,118 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 71.3 MB. Free memory is still 54.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 236.11 ms. Allocated memory is still 71.3 MB. Free memory was 54.4 MB in the beginning and 52.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.72 ms. Allocated memory is still 71.3 MB. Free memory was 52.6 MB in the beginning and 50.3 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.77 ms. Allocated memory is still 71.3 MB. Free memory was 49.9 MB in the beginning and 48.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 462.75 ms. Allocated memory was 71.3 MB in the beginning and 88.1 MB in the end (delta: 16.8 MB). Free memory was 47.9 MB in the beginning and 43.3 MB in the end (delta: 4.6 MB). Peak memory consumption was 23.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8033.39 ms. Allocated memory was 88.1 MB in the beginning and 130.0 MB in the end (delta: 41.9 MB). Free memory was 42.8 MB in the beginning and 65.1 MB in the end (delta: -22.3 MB). Peak memory consumption was 18.0 MB. Max. memory is 16.1 GB. * Witness Printer took 94.19 ms. Allocated memory is still 130.0 MB. Free memory was 65.1 MB in the beginning and 44.2 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: 609]: a call to reach_error is reachable a call to reach_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 = __VERIFIER_nondet_int(); [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 = __VERIFIER_nondet_uint(); [L28] unsigned int s__ctx__stats__sess_connect = __VERIFIER_nondet_uint(); [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 = __VERIFIER_nondet_int(); [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 = __VERIFIER_nondet_int(); [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 [L609] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 125 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.8s, OverallIterations: 16, TraceHistogramMax: 11, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3099 SDtfs, 715 SDslu, 1809 SDs, 0 SdLazy, 792 SolverSat, 103 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1591 GetRequests, 1576 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1554occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 33 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 1802 NumberOfCodeBlocks, 1802 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 1591 ConstructedInterpolants, 0 QuantifiedInterpolants, 374179 SizeOfPredicates, 0 NumberOfNonLiveVariables, 2733 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 15 InterpolantComputations, 15 PerfectInterpolantSequences, 2879/2879 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...