./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test27-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_e9e8b90c-5308-4e0e-b771-2a3f8f44d1e9/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_e9e8b90c-5308-4e0e-b771-2a3f8f44d1e9/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e9e8b90c-5308-4e0e-b771-2a3f8f44d1e9/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e9e8b90c-5308-4e0e-b771-2a3f8f44d1e9/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test27-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e9e8b90c-5308-4e0e-b771-2a3f8f44d1e9/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e9e8b90c-5308-4e0e-b771-2a3f8f44d1e9/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8d15e59fd1b84d7219285b33cc166f567d0bcf3e ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.1.24-cad4683 [2019-11-15 21:11:05,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 21:11:05,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 21:11:05,460 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 21:11:05,461 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 21:11:05,463 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 21:11:05,465 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 21:11:05,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 21:11:05,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 21:11:05,484 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 21:11:05,485 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 21:11:05,486 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 21:11:05,486 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 21:11:05,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 21:11:05,488 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 21:11:05,489 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 21:11:05,490 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 21:11:05,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 21:11:05,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 21:11:05,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 21:11:05,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 21:11:05,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 21:11:05,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 21:11:05,512 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 21:11:05,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 21:11:05,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 21:11:05,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 21:11:05,518 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 21:11:05,518 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 21:11:05,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 21:11:05,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 21:11:05,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 21:11:05,521 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 21:11:05,522 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 21:11:05,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 21:11:05,524 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 21:11:05,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 21:11:05,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 21:11:05,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 21:11:05,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 21:11:05,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 21:11:05,528 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e9e8b90c-5308-4e0e-b771-2a3f8f44d1e9/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 21:11:05,559 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 21:11:05,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 21:11:05,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 21:11:05,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 21:11:05,561 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 21:11:05,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 21:11:05,562 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 21:11:05,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 21:11:05,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 21:11:05,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 21:11:05,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 21:11:05,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 21:11:05,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 21:11:05,564 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 21:11:05,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 21:11:05,564 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 21:11:05,564 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 21:11:05,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 21:11:05,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 21:11:05,565 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 21:11:05,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 21:11:05,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 21:11:05,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 21:11:05,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 21:11:05,566 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 21:11:05,566 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 21:11:05,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 21:11:05,567 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 21:11:05,567 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_e9e8b90c-5308-4e0e-b771-2a3f8f44d1e9/bin/uautomizer 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(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer 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 -> 8d15e59fd1b84d7219285b33cc166f567d0bcf3e [2019-11-15 21:11:05,607 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 21:11:05,620 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 21:11:05,624 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 21:11:05,626 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 21:11:05,626 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 21:11:05,627 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e9e8b90c-5308-4e0e-b771-2a3f8f44d1e9/bin/uautomizer/../../sv-benchmarks/c/ldv-regression/test27-2.c [2019-11-15 21:11:05,705 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e9e8b90c-5308-4e0e-b771-2a3f8f44d1e9/bin/uautomizer/data/cc2183220/e6c0181ae06c452e8a9b82280c0fec88/FLAG54b54f50d [2019-11-15 21:11:06,138 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 21:11:06,142 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e9e8b90c-5308-4e0e-b771-2a3f8f44d1e9/sv-benchmarks/c/ldv-regression/test27-2.c [2019-11-15 21:11:06,148 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e9e8b90c-5308-4e0e-b771-2a3f8f44d1e9/bin/uautomizer/data/cc2183220/e6c0181ae06c452e8a9b82280c0fec88/FLAG54b54f50d [2019-11-15 21:11:06,563 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e9e8b90c-5308-4e0e-b771-2a3f8f44d1e9/bin/uautomizer/data/cc2183220/e6c0181ae06c452e8a9b82280c0fec88 [2019-11-15 21:11:06,565 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 21:11:06,567 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 21:11:06,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 21:11:06,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 21:11:06,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 21:11:06,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 09:11:06" (1/1) ... [2019-11-15 21:11:06,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@110994a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:11:06, skipping insertion in model container [2019-11-15 21:11:06,576 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 09:11:06" (1/1) ... [2019-11-15 21:11:06,585 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 21:11:06,604 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 21:11:07,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 21:11:07,015 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 21:11:07,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 21:11:07,081 INFO L192 MainTranslator]: Completed translation [2019-11-15 21:11:07,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:11:07 WrapperNode [2019-11-15 21:11:07,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 21:11:07,083 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 21:11:07,083 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 21:11:07,083 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 21:11:07,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:11:07" (1/1) ... [2019-11-15 21:11:07,106 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:11:07" (1/1) ... [2019-11-15 21:11:07,141 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 21:11:07,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 21:11:07,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 21:11:07,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 21:11:07,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:11:07" (1/1) ... [2019-11-15 21:11:07,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:11:07" (1/1) ... [2019-11-15 21:11:07,154 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:11:07" (1/1) ... [2019-11-15 21:11:07,154 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:11:07" (1/1) ... [2019-11-15 21:11:07,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:11:07" (1/1) ... [2019-11-15 21:11:07,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:11:07" (1/1) ... [2019-11-15 21:11:07,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:11:07" (1/1) ... [2019-11-15 21:11:07,174 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 21:11:07,175 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 21:11:07,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 21:11:07,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 21:11:07,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:11:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e9e8b90c-5308-4e0e-b771-2a3f8f44d1e9/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 21:11:07,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-15 21:11:07,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-15 21:11:07,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-15 21:11:07,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-15 21:11:07,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 21:11:07,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 21:11:07,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-15 21:11:07,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-15 21:11:07,662 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 21:11:07,662 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-15 21:11:07,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:11:07 BoogieIcfgContainer [2019-11-15 21:11:07,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 21:11:07,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 21:11:07,665 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 21:11:07,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 21:11:07,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 09:11:06" (1/3) ... [2019-11-15 21:11:07,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf914bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 09:11:07, skipping insertion in model container [2019-11-15 21:11:07,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:11:07" (2/3) ... [2019-11-15 21:11:07,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf914bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 09:11:07, skipping insertion in model container [2019-11-15 21:11:07,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:11:07" (3/3) ... [2019-11-15 21:11:07,679 INFO L109 eAbstractionObserver]: Analyzing ICFG test27-2.c [2019-11-15 21:11:07,690 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 21:11:07,704 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 21:11:07,716 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 21:11:07,747 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 21:11:07,748 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 21:11:07,748 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 21:11:07,748 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 21:11:07,749 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 21:11:07,749 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 21:11:07,749 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 21:11:07,749 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 21:11:07,768 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-15 21:11:07,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-15 21:11:07,776 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:11:07,777 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:11:07,779 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:11:07,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:11:07,785 INFO L82 PathProgramCache]: Analyzing trace with hash -631347226, now seen corresponding path program 1 times [2019-11-15 21:11:07,795 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:11:07,795 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426222339] [2019-11-15 21:11:07,796 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:11:07,796 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:11:07,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:11:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:11:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:11:08,025 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426222339] [2019-11-15 21:11:08,026 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 21:11:08,026 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-15 21:11:08,026 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757107254] [2019-11-15 21:11:08,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-15 21:11:08,030 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:11:08,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-15 21:11:08,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 21:11:08,049 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-11-15 21:11:08,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:11:08,065 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2019-11-15 21:11:08,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-15 21:11:08,067 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-15 21:11:08,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:11:08,075 INFO L225 Difference]: With dead ends: 30 [2019-11-15 21:11:08,076 INFO L226 Difference]: Without dead ends: 13 [2019-11-15 21:11:08,078 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 21:11:08,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-15 21:11:08,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-15 21:11:08,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-15 21:11:08,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-15 21:11:08,112 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-11-15 21:11:08,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:11:08,113 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-15 21:11:08,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-15 21:11:08,113 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-15 21:11:08,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-15 21:11:08,114 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:11:08,114 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:11:08,115 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:11:08,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:11:08,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1697064536, now seen corresponding path program 1 times [2019-11-15 21:11:08,116 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:11:08,116 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079476846] [2019-11-15 21:11:08,116 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:11:08,117 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:11:08,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:11:08,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:11:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:11:08,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079476846] [2019-11-15 21:11:08,193 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 21:11:08,193 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 21:11:08,194 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924276197] [2019-11-15 21:11:08,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 21:11:08,196 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:11:08,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 21:11:08,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 21:11:08,197 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2019-11-15 21:11:08,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:11:08,229 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2019-11-15 21:11:08,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 21:11:08,231 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-15 21:11:08,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:11:08,231 INFO L225 Difference]: With dead ends: 24 [2019-11-15 21:11:08,231 INFO L226 Difference]: Without dead ends: 15 [2019-11-15 21:11:08,232 INFO L600 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 [2019-11-15 21:11:08,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-15 21:11:08,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-15 21:11:08,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-15 21:11:08,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-15 21:11:08,241 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2019-11-15 21:11:08,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:11:08,241 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-15 21:11:08,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 21:11:08,242 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-15 21:11:08,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-15 21:11:08,243 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:11:08,243 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:11:08,244 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:11:08,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:11:08,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1434190826, now seen corresponding path program 1 times [2019-11-15 21:11:08,246 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:11:08,247 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350597190] [2019-11-15 21:11:08,248 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:11:08,248 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:11:08,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:11:08,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:11:08,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:11:08,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350597190] [2019-11-15 21:11:08,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071546601] [2019-11-15 21:11:08,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e9e8b90c-5308-4e0e-b771-2a3f8f44d1e9/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:11:08,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:11:08,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 21:11:08,515 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:11:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:11:08,564 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:11:08,564 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-15 21:11:08,565 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427580674] [2019-11-15 21:11:08,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 21:11:08,567 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:11:08,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 21:11:08,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-15 21:11:08,569 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2019-11-15 21:11:08,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:11:08,624 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2019-11-15 21:11:08,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 21:11:08,626 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-11-15 21:11:08,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:11:08,626 INFO L225 Difference]: With dead ends: 26 [2019-11-15 21:11:08,627 INFO L226 Difference]: Without dead ends: 17 [2019-11-15 21:11:08,627 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-15 21:11:08,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-15 21:11:08,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-11-15 21:11:08,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-15 21:11:08,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-11-15 21:11:08,631 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2019-11-15 21:11:08,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:11:08,631 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-11-15 21:11:08,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 21:11:08,632 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-11-15 21:11:08,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-15 21:11:08,632 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:11:08,633 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:11:08,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:11:08,839 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:11:08,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:11:08,839 INFO L82 PathProgramCache]: Analyzing trace with hash 201480788, now seen corresponding path program 2 times [2019-11-15 21:11:08,839 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:11:08,840 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635169313] [2019-11-15 21:11:08,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:11:08,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:11:08,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:11:08,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:11:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:11:08,957 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635169313] [2019-11-15 21:11:08,957 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983149631] [2019-11-15 21:11:08,958 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e9e8b90c-5308-4e0e-b771-2a3f8f44d1e9/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:11:09,067 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 21:11:09,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:11:09,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 21:11:09,070 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:11:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:11:09,086 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:11:09,086 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-15 21:11:09,086 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060945275] [2019-11-15 21:11:09,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 21:11:09,088 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:11:09,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 21:11:09,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-15 21:11:09,089 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2019-11-15 21:11:09,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:11:09,125 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2019-11-15 21:11:09,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 21:11:09,126 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-15 21:11:09,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:11:09,127 INFO L225 Difference]: With dead ends: 28 [2019-11-15 21:11:09,127 INFO L226 Difference]: Without dead ends: 19 [2019-11-15 21:11:09,128 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-15 21:11:09,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-15 21:11:09,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-11-15 21:11:09,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-15 21:11:09,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-11-15 21:11:09,133 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2019-11-15 21:11:09,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:11:09,133 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-11-15 21:11:09,133 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 21:11:09,134 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-11-15 21:11:09,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-15 21:11:09,135 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:11:09,135 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:11:09,340 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:11:09,340 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:11:09,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:11:09,340 INFO L82 PathProgramCache]: Analyzing trace with hash 123871506, now seen corresponding path program 3 times [2019-11-15 21:11:09,341 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:11:09,341 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485243434] [2019-11-15 21:11:09,341 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:11:09,342 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:11:09,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:11:09,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:11:09,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:11:09,440 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485243434] [2019-11-15 21:11:09,441 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785395380] [2019-11-15 21:11:09,441 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e9e8b90c-5308-4e0e-b771-2a3f8f44d1e9/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:11:09,679 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-15 21:11:09,680 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:11:09,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 21:11:09,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:11:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:11:09,699 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:11:09,699 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-15 21:11:09,700 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144187577] [2019-11-15 21:11:09,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 21:11:09,701 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:11:09,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 21:11:09,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-15 21:11:09,704 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2019-11-15 21:11:09,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:11:09,762 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-11-15 21:11:09,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 21:11:09,764 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-11-15 21:11:09,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:11:09,765 INFO L225 Difference]: With dead ends: 30 [2019-11-15 21:11:09,765 INFO L226 Difference]: Without dead ends: 21 [2019-11-15 21:11:09,766 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-15 21:11:09,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-15 21:11:09,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-11-15 21:11:09,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-15 21:11:09,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-15 21:11:09,770 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2019-11-15 21:11:09,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:11:09,770 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-15 21:11:09,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 21:11:09,770 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-15 21:11:09,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-15 21:11:09,775 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:11:09,775 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:11:09,976 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:11:09,976 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:11:09,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:11:09,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1444204464, now seen corresponding path program 4 times [2019-11-15 21:11:09,977 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:11:09,977 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631299892] [2019-11-15 21:11:09,977 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:11:09,977 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:11:09,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:11:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:11:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:11:10,143 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631299892] [2019-11-15 21:11:10,144 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153434632] [2019-11-15 21:11:10,144 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e9e8b90c-5308-4e0e-b771-2a3f8f44d1e9/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:11:10,270 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 21:11:10,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:11:10,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 21:11:10,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:11:10,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:11:10,293 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:11:10,293 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-15 21:11:10,293 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840496091] [2019-11-15 21:11:10,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 21:11:10,294 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:11:10,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 21:11:10,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-15 21:11:10,299 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2019-11-15 21:11:10,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:11:10,368 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2019-11-15 21:11:10,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 21:11:10,372 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2019-11-15 21:11:10,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:11:10,373 INFO L225 Difference]: With dead ends: 32 [2019-11-15 21:11:10,373 INFO L226 Difference]: Without dead ends: 23 [2019-11-15 21:11:10,373 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-15 21:11:10,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-15 21:11:10,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-11-15 21:11:10,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-15 21:11:10,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-11-15 21:11:10,383 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2019-11-15 21:11:10,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:11:10,383 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-11-15 21:11:10,383 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 21:11:10,384 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-11-15 21:11:10,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-15 21:11:10,385 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:11:10,385 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:11:10,590 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:11:10,591 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:11:10,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:11:10,591 INFO L82 PathProgramCache]: Analyzing trace with hash -831690738, now seen corresponding path program 5 times [2019-11-15 21:11:10,592 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:11:10,592 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519039672] [2019-11-15 21:11:10,592 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:11:10,592 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:11:10,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:11:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:11:10,710 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:11:10,710 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519039672] [2019-11-15 21:11:10,711 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947063261] [2019-11-15 21:11:10,711 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e9e8b90c-5308-4e0e-b771-2a3f8f44d1e9/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:11:11,129 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-15 21:11:11,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:11:11,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-15 21:11:11,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:11:11,157 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:11:11,157 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:11:11,157 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-15 21:11:11,158 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412729180] [2019-11-15 21:11:11,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-15 21:11:11,159 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:11:11,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-15 21:11:11,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-15 21:11:11,165 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2019-11-15 21:11:11,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:11:11,236 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-11-15 21:11:11,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-15 21:11:11,237 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2019-11-15 21:11:11,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:11:11,238 INFO L225 Difference]: With dead ends: 34 [2019-11-15 21:11:11,239 INFO L226 Difference]: Without dead ends: 25 [2019-11-15 21:11:11,239 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-15 21:11:11,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-15 21:11:11,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-15 21:11:11,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-15 21:11:11,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-11-15 21:11:11,246 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2019-11-15 21:11:11,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:11:11,247 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-11-15 21:11:11,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-15 21:11:11,247 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-11-15 21:11:11,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-15 21:11:11,249 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:11:11,249 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:11:11,463 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:11:11,463 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:11:11,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:11:11,463 INFO L82 PathProgramCache]: Analyzing trace with hash -616519604, now seen corresponding path program 6 times [2019-11-15 21:11:11,464 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:11:11,464 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437526624] [2019-11-15 21:11:11,464 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:11:11,465 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:11:11,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:11:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:11:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:11:11,588 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437526624] [2019-11-15 21:11:11,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815368405] [2019-11-15 21:11:11,589 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e9e8b90c-5308-4e0e-b771-2a3f8f44d1e9/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:11:15,830 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-15 21:11:15,830 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:11:15,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 21:11:15,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:11:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:11:15,857 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:11:15,857 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-15 21:11:15,858 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660047609] [2019-11-15 21:11:15,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-15 21:11:15,858 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:11:15,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 21:11:15,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-15 21:11:15,870 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2019-11-15 21:11:15,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:11:15,946 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-11-15 21:11:15,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-15 21:11:15,949 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-15 21:11:15,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:11:15,950 INFO L225 Difference]: With dead ends: 36 [2019-11-15 21:11:15,950 INFO L226 Difference]: Without dead ends: 27 [2019-11-15 21:11:15,951 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-15 21:11:15,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-15 21:11:15,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-11-15 21:11:15,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-15 21:11:15,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-15 21:11:15,964 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2019-11-15 21:11:15,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:11:15,964 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-15 21:11:15,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-15 21:11:15,965 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-15 21:11:15,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-15 21:11:15,965 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:11:15,965 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:11:16,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:11:16,166 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:11:16,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:11:16,167 INFO L82 PathProgramCache]: Analyzing trace with hash 4509962, now seen corresponding path program 7 times [2019-11-15 21:11:16,167 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:11:16,167 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403984215] [2019-11-15 21:11:16,168 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:11:16,168 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:11:16,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:11:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:11:16,345 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:11:16,346 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403984215] [2019-11-15 21:11:16,346 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742475951] [2019-11-15 21:11:16,346 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e9e8b90c-5308-4e0e-b771-2a3f8f44d1e9/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:11:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:11:16,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-15 21:11:16,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:11:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:11:16,458 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:11:16,458 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-15 21:11:16,458 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037339346] [2019-11-15 21:11:16,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-15 21:11:16,463 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:11:16,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-15 21:11:16,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-15 21:11:16,464 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2019-11-15 21:11:16,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:11:16,556 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2019-11-15 21:11:16,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-15 21:11:16,558 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2019-11-15 21:11:16,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:11:16,559 INFO L225 Difference]: With dead ends: 38 [2019-11-15 21:11:16,559 INFO L226 Difference]: Without dead ends: 29 [2019-11-15 21:11:16,559 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-15 21:11:16,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-15 21:11:16,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-15 21:11:16,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-15 21:11:16,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2019-11-15 21:11:16,564 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2019-11-15 21:11:16,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:11:16,565 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2019-11-15 21:11:16,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-15 21:11:16,565 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2019-11-15 21:11:16,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-15 21:11:16,566 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:11:16,566 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:11:16,774 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:11:16,775 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:11:16,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:11:16,775 INFO L82 PathProgramCache]: Analyzing trace with hash -186531256, now seen corresponding path program 8 times [2019-11-15 21:11:16,775 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:11:16,776 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052497899] [2019-11-15 21:11:16,776 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:11:16,776 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:11:16,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:11:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:11:16,962 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:11:16,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052497899] [2019-11-15 21:11:16,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467929234] [2019-11-15 21:11:16,963 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e9e8b90c-5308-4e0e-b771-2a3f8f44d1e9/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:11:17,125 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 21:11:17,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:11:17,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-15 21:11:17,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:11:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:11:17,159 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:11:17,160 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-15 21:11:17,160 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169999802] [2019-11-15 21:11:17,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-15 21:11:17,161 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:11:17,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-15 21:11:17,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-15 21:11:17,162 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 12 states. [2019-11-15 21:11:17,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:11:17,244 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2019-11-15 21:11:17,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-15 21:11:17,245 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-11-15 21:11:17,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:11:17,246 INFO L225 Difference]: With dead ends: 40 [2019-11-15 21:11:17,246 INFO L226 Difference]: Without dead ends: 31 [2019-11-15 21:11:17,247 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-15 21:11:17,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-15 21:11:17,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-15 21:11:17,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-15 21:11:17,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-11-15 21:11:17,251 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2019-11-15 21:11:17,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:11:17,255 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-11-15 21:11:17,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-15 21:11:17,256 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-11-15 21:11:17,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-15 21:11:17,259 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:11:17,262 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:11:17,468 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:11:17,469 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:11:17,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:11:17,470 INFO L82 PathProgramCache]: Analyzing trace with hash 906451974, now seen corresponding path program 9 times [2019-11-15 21:11:17,470 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:11:17,470 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286875947] [2019-11-15 21:11:17,470 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:11:17,470 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:11:17,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:11:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:11:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:11:17,646 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286875947] [2019-11-15 21:11:17,646 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836556184] [2019-11-15 21:11:17,646 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e9e8b90c-5308-4e0e-b771-2a3f8f44d1e9/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:11:31,172 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-15 21:11:31,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:11:31,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-15 21:11:31,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:11:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:11:31,201 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:11:31,201 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-15 21:11:31,201 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278122399] [2019-11-15 21:11:31,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-15 21:11:31,202 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:11:31,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-15 21:11:31,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-15 21:11:31,203 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 13 states. [2019-11-15 21:11:31,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:11:31,294 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2019-11-15 21:11:31,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-15 21:11:31,295 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2019-11-15 21:11:31,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:11:31,296 INFO L225 Difference]: With dead ends: 41 [2019-11-15 21:11:31,296 INFO L226 Difference]: Without dead ends: 32 [2019-11-15 21:11:31,297 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-15 21:11:31,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-15 21:11:31,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-15 21:11:31,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-15 21:11:31,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-15 21:11:31,301 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2019-11-15 21:11:31,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:11:31,302 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-15 21:11:31,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-15 21:11:31,302 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-15 21:11:31,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-15 21:11:31,302 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:11:31,303 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:11:31,515 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:11:31,515 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:11:31,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:11:31,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1003651516, now seen corresponding path program 10 times [2019-11-15 21:11:31,516 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:11:31,516 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080931450] [2019-11-15 21:11:31,516 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:11:31,517 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:11:31,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:11:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:11:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:11:31,950 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 21:11:31,950 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-15 21:11:32,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 09:11:32 BoogieIcfgContainer [2019-11-15 21:11:32,024 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 21:11:32,025 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 21:11:32,025 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 21:11:32,025 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 21:11:32,026 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:11:07" (3/4) ... [2019-11-15 21:11:32,028 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-15 21:11:32,146 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e9e8b90c-5308-4e0e-b771-2a3f8f44d1e9/bin/uautomizer/witness.graphml [2019-11-15 21:11:32,147 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 21:11:32,151 INFO L168 Benchmark]: Toolchain (without parser) took 25581.92 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 227.0 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -117.0 MB). Peak memory consumption was 110.0 MB. Max. memory is 11.5 GB. [2019-11-15 21:11:32,152 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 21:11:32,152 INFO L168 Benchmark]: CACSL2BoogieTranslator took 514.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 170.4 MB). Free memory was 943.4 MB in the beginning and 1.2 GB in the end (delta: -216.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-15 21:11:32,153 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.68 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 21:11:32,154 INFO L168 Benchmark]: Boogie Preprocessor took 32.36 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-11-15 21:11:32,154 INFO L168 Benchmark]: RCFGBuilder took 489.46 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 21.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 11.5 GB. [2019-11-15 21:11:32,155 INFO L168 Benchmark]: TraceAbstraction took 24359.47 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 56.6 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 69.0 MB). Peak memory consumption was 125.6 MB. Max. memory is 11.5 GB. [2019-11-15 21:11:32,155 INFO L168 Benchmark]: Witness Printer took 122.08 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 11.5 GB. [2019-11-15 21:11:32,160 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 514.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 170.4 MB). Free memory was 943.4 MB in the beginning and 1.2 GB in the end (delta: -216.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 58.68 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 32.36 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 489.46 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 21.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 24359.47 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 56.6 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 69.0 MB). Peak memory consumption was 125.6 MB. Max. memory is 11.5 GB. * Witness Printer took 122.08 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 51]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L22] struct cont cont; [L23] struct dummy dummy; [L24] struct dummy *dummies[10]; [L25] int a[10]; [L26] int i, *pa; [L27] i = __VERIFIER_nondet_int() [L28] int j = 0; [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ [L28] COND TRUE j < 10 [L29] a[j] = __VERIFIER_nondet_int() [L30] dummies[j] = __VERIFIER_nondet_pointer() [L28] j++ [L28] COND FALSE !(j < 10) [L32] COND TRUE i >= 0 && i < 9 [L33] a[i] = i [L34] dummy.array = &a[i] [L35] dummies[i + 1] = &dummy [L36] cont.array = &dummies[0] [L37] EXPR cont.array [L37] EXPR cont.array[i] [L37] EXPR cont.array[i]->array [L37] pa = &cont.array[i]->array[i] [L38] EXPR a[i] [L38] COND TRUE a[i] > 0 [L39] EXPR dummies[i + 1] [L39] EXPR dummies[i + 1]->array [L39] EXPR dummies[i + 1]->array[i] [L39] i = dummies[i + 1]->array[i] - 10 [L40] EXPR \read(*pa) [L40] COND FALSE !(i < *pa) [L17] EXPR pc->array [L17] EXPR pc->array[i] [L17] EXPR pc->array[i]->array [L17] EXPR pc->array[i]->array[i] [L17] return pc->array[i]->array[i] == i; [L43] COND TRUE !check(&cont, i) [L51] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Result: UNSAFE, OverallTime: 24.2s, OverallIterations: 12, TraceHistogramMax: 10, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 140 SDtfs, 55 SDslu, 520 SDs, 0 SdLazy, 189 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 257 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 9 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 19.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 430 NumberOfCodeBlocks, 430 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 379 ConstructedInterpolants, 0 QuantifiedInterpolants, 16761 SizeOfPredicates, 9 NumberOfNonLiveVariables, 1188 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 0/570 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...