./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/ddlm2013.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a722eb36-0905-48ea-a9d4-76ecb389ec4a/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a722eb36-0905-48ea-a9d4-76ecb389ec4a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a722eb36-0905-48ea-a9d4-76ecb389ec4a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a722eb36-0905-48ea-a9d4-76ecb389ec4a/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/ddlm2013.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a722eb36-0905-48ea-a9d4-76ecb389ec4a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a722eb36-0905-48ea-a9d4-76ecb389ec4a/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 953c2c7138ded523b779da42ba3c8319bcf980e6 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 19:02:59,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:02:59,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:02:59,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:02:59,892 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:02:59,897 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:02:59,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:02:59,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:02:59,919 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:02:59,927 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:02:59,928 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:02:59,930 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:02:59,931 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:02:59,935 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:02:59,937 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:02:59,940 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:02:59,942 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:02:59,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:02:59,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:02:59,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:02:59,964 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:02:59,966 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:02:59,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:02:59,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:02:59,979 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:02:59,980 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:02:59,981 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:02:59,983 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:02:59,984 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:02:59,986 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:02:59,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:02:59,988 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:02:59,990 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:02:59,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:02:59,993 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:02:59,994 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:02:59,995 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:02:59,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:02:59,996 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:02:59,997 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:02:59,998 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:03:00,001 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a722eb36-0905-48ea-a9d4-76ecb389ec4a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 19:03:00,050 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:03:00,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:03:00,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:03:00,053 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:03:00,053 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:03:00,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:03:00,054 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:03:00,054 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:03:00,055 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:03:00,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:03:00,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 19:03:00,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:03:00,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 19:03:00,057 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:03:00,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:03:00,057 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:03:00,058 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 19:03:00,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:03:00,058 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:03:00,059 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:03:00,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:03:00,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:03:00,060 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:03:00,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:03:00,060 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 19:03:00,060 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:03:00,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 19:03:00,061 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 19:03:00,061 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:03:00,061 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_a722eb36-0905-48ea-a9d4-76ecb389ec4a/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a722eb36-0905-48ea-a9d4-76ecb389ec4a/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 953c2c7138ded523b779da42ba3c8319bcf980e6 [2020-11-29 19:03:00,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:03:00,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:03:00,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:03:00,383 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:03:00,384 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:03:00,385 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a722eb36-0905-48ea-a9d4-76ecb389ec4a/bin/uautomizer/../../sv-benchmarks/c/loop-lit/ddlm2013.i [2020-11-29 19:03:00,451 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a722eb36-0905-48ea-a9d4-76ecb389ec4a/bin/uautomizer/data/413177427/94f4202a9b9240239cd4b933fb9384f2/FLAG6b4461fc5 [2020-11-29 19:03:00,942 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:03:00,943 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a722eb36-0905-48ea-a9d4-76ecb389ec4a/sv-benchmarks/c/loop-lit/ddlm2013.i [2020-11-29 19:03:00,953 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a722eb36-0905-48ea-a9d4-76ecb389ec4a/bin/uautomizer/data/413177427/94f4202a9b9240239cd4b933fb9384f2/FLAG6b4461fc5 [2020-11-29 19:03:01,423 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a722eb36-0905-48ea-a9d4-76ecb389ec4a/bin/uautomizer/data/413177427/94f4202a9b9240239cd4b933fb9384f2 [2020-11-29 19:03:01,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:03:01,427 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:03:01,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:03:01,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:03:01,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:03:01,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:03:01" (1/1) ... [2020-11-29 19:03:01,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1360a84c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:03:01, skipping insertion in model container [2020-11-29 19:03:01,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:03:01" (1/1) ... [2020-11-29 19:03:01,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:03:01,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:03:01,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:03:01,715 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:03:01,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:03:01,767 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:03:01,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:03:01 WrapperNode [2020-11-29 19:03:01,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:03:01,770 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:03:01,770 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:03:01,771 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:03:01,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:03:01" (1/1) ... [2020-11-29 19:03:01,789 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:03:01" (1/1) ... [2020-11-29 19:03:01,805 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:03:01,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:03:01,806 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:03:01,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:03:01,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:03:01" (1/1) ... [2020-11-29 19:03:01,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:03:01" (1/1) ... [2020-11-29 19:03:01,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:03:01" (1/1) ... [2020-11-29 19:03:01,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:03:01" (1/1) ... [2020-11-29 19:03:01,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:03:01" (1/1) ... [2020-11-29 19:03:01,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:03:01" (1/1) ... [2020-11-29 19:03:01,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:03:01" (1/1) ... [2020-11-29 19:03:01,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:03:01,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:03:01,827 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:03:01,827 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:03:01,828 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:03:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a722eb36-0905-48ea-a9d4-76ecb389ec4a/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 [2020-11-29 19:03:01,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 19:03:01,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:03:01,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:03:01,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:03:02,410 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:03:02,410 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-29 19:03:02,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:03:02 BoogieIcfgContainer [2020-11-29 19:03:02,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:03:02,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:03:02,416 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:03:02,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:03:02,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:03:01" (1/3) ... [2020-11-29 19:03:02,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@514db77d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:03:02, skipping insertion in model container [2020-11-29 19:03:02,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:03:01" (2/3) ... [2020-11-29 19:03:02,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@514db77d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:03:02, skipping insertion in model container [2020-11-29 19:03:02,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:03:02" (3/3) ... [2020-11-29 19:03:02,424 INFO L111 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2020-11-29 19:03:02,442 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:03:02,447 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 19:03:02,460 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 19:03:02,499 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:03:02,500 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 19:03:02,500 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:03:02,500 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:03:02,500 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:03:02,500 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:03:02,500 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:03:02,500 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:03:02,518 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-11-29 19:03:02,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 19:03:02,524 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:03:02,525 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:03:02,525 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:03:02,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:03:02,537 INFO L82 PathProgramCache]: Analyzing trace with hash -119810903, now seen corresponding path program 1 times [2020-11-29 19:03:02,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:03:02,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351361013] [2020-11-29 19:03:02,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:03:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:03:02,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:03:02,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351361013] [2020-11-29 19:03:02,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:03:02,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 19:03:02,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660341695] [2020-11-29 19:03:02,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 19:03:02,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:03:02,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 19:03:02,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 19:03:02,709 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-11-29 19:03:02,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:03:02,724 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2020-11-29 19:03:02,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 19:03:02,726 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-11-29 19:03:02,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:03:02,735 INFO L225 Difference]: With dead ends: 27 [2020-11-29 19:03:02,735 INFO L226 Difference]: Without dead ends: 12 [2020-11-29 19:03:02,738 INFO L677 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 [2020-11-29 19:03:02,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-29 19:03:02,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-29 19:03:02,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-29 19:03:02,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-11-29 19:03:02,770 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2020-11-29 19:03:02,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:03:02,771 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-11-29 19:03:02,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 19:03:02,772 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-11-29 19:03:02,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 19:03:02,773 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:03:02,773 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:03:02,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 19:03:02,774 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:03:02,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:03:02,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1524540283, now seen corresponding path program 1 times [2020-11-29 19:03:02,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:03:02,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993985681] [2020-11-29 19:03:02,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:03:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:03:03,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:03:03,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993985681] [2020-11-29 19:03:03,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:03:03,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:03:03,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455952835] [2020-11-29 19:03:03,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:03:03,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:03:03,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:03:03,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:03:03,011 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 4 states. [2020-11-29 19:03:03,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:03:03,098 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-11-29 19:03:03,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:03:03,100 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-29 19:03:03,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:03:03,100 INFO L225 Difference]: With dead ends: 20 [2020-11-29 19:03:03,101 INFO L226 Difference]: Without dead ends: 14 [2020-11-29 19:03:03,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:03:03,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-29 19:03:03,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-11-29 19:03:03,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-29 19:03:03,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-11-29 19:03:03,117 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2020-11-29 19:03:03,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:03:03,118 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-11-29 19:03:03,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:03:03,118 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-11-29 19:03:03,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 19:03:03,119 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:03:03,119 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:03:03,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 19:03:03,119 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:03:03,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:03:03,120 INFO L82 PathProgramCache]: Analyzing trace with hash -648547728, now seen corresponding path program 1 times [2020-11-29 19:03:03,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:03:03,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34463446] [2020-11-29 19:03:03,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:03:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:03:03,460 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 16 [2020-11-29 19:03:03,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:03:03,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34463446] [2020-11-29 19:03:03,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369360310] [2020-11-29 19:03:03,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a722eb36-0905-48ea-a9d4-76ecb389ec4a/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 [2020-11-29 19:03:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:03:03,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 19:03:03,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:03:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:03:03,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:03:03,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-11-29 19:03:03,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761814087] [2020-11-29 19:03:03,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 19:03:03,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:03:03,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 19:03:03,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:03:03,652 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 8 states. [2020-11-29 19:03:03,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:03:03,725 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-11-29 19:03:03,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 19:03:03,726 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-11-29 19:03:03,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:03:03,727 INFO L225 Difference]: With dead ends: 25 [2020-11-29 19:03:03,727 INFO L226 Difference]: Without dead ends: 19 [2020-11-29 19:03:03,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:03:03,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-29 19:03:03,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-11-29 19:03:03,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-29 19:03:03,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-11-29 19:03:03,731 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2020-11-29 19:03:03,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:03:03,732 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-11-29 19:03:03,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 19:03:03,732 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-11-29 19:03:03,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 19:03:03,733 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:03:03,733 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:03:03,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-29 19:03:03,941 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:03:03,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:03:03,942 INFO L82 PathProgramCache]: Analyzing trace with hash 52516850, now seen corresponding path program 1 times [2020-11-29 19:03:03,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:03:03,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281135244] [2020-11-29 19:03:03,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:03:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:03:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 19:03:03,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281135244] [2020-11-29 19:03:03,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:03:03,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:03:03,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728430767] [2020-11-29 19:03:03,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:03:03,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:03:03,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:03:03,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:03:03,983 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 3 states. [2020-11-29 19:03:03,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:03:03,995 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-11-29 19:03:03,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:03:03,996 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-11-29 19:03:03,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:03:03,996 INFO L225 Difference]: With dead ends: 28 [2020-11-29 19:03:03,997 INFO L226 Difference]: Without dead ends: 17 [2020-11-29 19:03:03,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:03:03,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-29 19:03:03,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-29 19:03:04,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-29 19:03:04,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-11-29 19:03:04,000 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2020-11-29 19:03:04,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:03:04,001 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-11-29 19:03:04,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:03:04,001 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-11-29 19:03:04,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 19:03:04,002 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:03:04,002 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:03:04,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 19:03:04,002 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:03:04,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:03:04,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1071430821, now seen corresponding path program 2 times [2020-11-29 19:03:04,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:03:04,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563533608] [2020-11-29 19:03:04,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:03:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:03:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:03:04,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563533608] [2020-11-29 19:03:04,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758796955] [2020-11-29 19:03:04,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a722eb36-0905-48ea-a9d4-76ecb389ec4a/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 [2020-11-29 19:03:04,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:03:04,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:03:04,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-29 19:03:04,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:03:04,484 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:03:04,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:03:04,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-11-29 19:03:04,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948212221] [2020-11-29 19:03:04,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 19:03:04,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:03:04,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 19:03:04,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-11-29 19:03:04,486 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 12 states. [2020-11-29 19:03:04,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:03:04,602 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-11-29 19:03:04,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 19:03:04,604 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-11-29 19:03:04,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:03:04,605 INFO L225 Difference]: With dead ends: 33 [2020-11-29 19:03:04,605 INFO L226 Difference]: Without dead ends: 20 [2020-11-29 19:03:04,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-11-29 19:03:04,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-29 19:03:04,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-29 19:03:04,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-29 19:03:04,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-11-29 19:03:04,610 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 16 [2020-11-29 19:03:04,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:03:04,610 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-11-29 19:03:04,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 19:03:04,610 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-11-29 19:03:04,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 19:03:04,611 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:03:04,611 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:03:04,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:03:04,837 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:03:04,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:03:04,837 INFO L82 PathProgramCache]: Analyzing trace with hash -2042575216, now seen corresponding path program 3 times [2020-11-29 19:03:04,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:03:04,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587312637] [2020-11-29 19:03:04,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:03:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:03:05,087 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:03:05,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587312637] [2020-11-29 19:03:05,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88284430] [2020-11-29 19:03:05,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a722eb36-0905-48ea-a9d4-76ecb389ec4a/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 [2020-11-29 19:03:05,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-29 19:03:05,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:03:05,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-29 19:03:05,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:03:05,306 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:03:05,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:03:05,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-29 19:03:05,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372767434] [2020-11-29 19:03:05,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 19:03:05,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:03:05,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 19:03:05,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-11-29 19:03:05,309 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 16 states. [2020-11-29 19:03:05,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:03:05,656 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-11-29 19:03:05,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-29 19:03:05,657 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-11-29 19:03:05,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:03:05,658 INFO L225 Difference]: With dead ends: 50 [2020-11-29 19:03:05,658 INFO L226 Difference]: Without dead ends: 31 [2020-11-29 19:03:05,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2020-11-29 19:03:05,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-29 19:03:05,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-11-29 19:03:05,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-29 19:03:05,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-11-29 19:03:05,663 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 19 [2020-11-29 19:03:05,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:03:05,663 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-11-29 19:03:05,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 19:03:05,663 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-11-29 19:03:05,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 19:03:05,664 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:03:05,664 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:03:05,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:03:05,889 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:03:05,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:03:05,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1804476227, now seen corresponding path program 1 times [2020-11-29 19:03:05,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:03:05,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496385624] [2020-11-29 19:03:05,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:03:05,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:03:06,009 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 19:03:06,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496385624] [2020-11-29 19:03:06,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453941373] [2020-11-29 19:03:06,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a722eb36-0905-48ea-a9d4-76ecb389ec4a/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 [2020-11-29 19:03:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:03:06,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 19:03:06,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:03:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 19:03:06,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:03:06,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-29 19:03:06,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086444689] [2020-11-29 19:03:06,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 19:03:06,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:03:06,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 19:03:06,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:03:06,108 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2020-11-29 19:03:06,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:03:06,157 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-11-29 19:03:06,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 19:03:06,158 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-11-29 19:03:06,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:03:06,159 INFO L225 Difference]: With dead ends: 40 [2020-11-29 19:03:06,159 INFO L226 Difference]: Without dead ends: 29 [2020-11-29 19:03:06,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:03:06,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-29 19:03:06,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-11-29 19:03:06,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-29 19:03:06,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-11-29 19:03:06,164 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 22 [2020-11-29 19:03:06,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:03:06,164 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-11-29 19:03:06,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 19:03:06,165 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-11-29 19:03:06,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 19:03:06,166 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:03:06,166 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:03:06,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:03:06,377 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:03:06,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:03:06,378 INFO L82 PathProgramCache]: Analyzing trace with hash 496782107, now seen corresponding path program 4 times [2020-11-29 19:03:06,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:03:06,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346192451] [2020-11-29 19:03:06,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:03:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:03:06,846 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:03:06,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346192451] [2020-11-29 19:03:06,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883370910] [2020-11-29 19:03:06,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a722eb36-0905-48ea-a9d4-76ecb389ec4a/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 [2020-11-29 19:03:06,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:03:06,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:03:06,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 55 conjunts are in the unsatisfiable core [2020-11-29 19:03:06,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:03:07,309 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:03:07,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:03:07,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2020-11-29 19:03:07,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657124882] [2020-11-29 19:03:07,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-29 19:03:07,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:03:07,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-29 19:03:07,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2020-11-29 19:03:07,312 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2020-11-29 19:03:08,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:03:08,075 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-11-29 19:03:08,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 19:03:08,075 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2020-11-29 19:03:08,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:03:08,076 INFO L225 Difference]: With dead ends: 34 [2020-11-29 19:03:08,076 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 19:03:08,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2020-11-29 19:03:08,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 19:03:08,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 19:03:08,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 19:03:08,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 19:03:08,078 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2020-11-29 19:03:08,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:03:08,078 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 19:03:08,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-29 19:03:08,078 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 19:03:08,079 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 19:03:08,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:03:08,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 19:03:08,303 INFO L274 CegarLoopResult]: For program point L35-2(lines 24 49) no Hoare annotation was computed. [2020-11-29 19:03:08,304 INFO L274 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-11-29 19:03:08,304 INFO L277 CegarLoopResult]: At program point L48(lines 24 49) the Hoare annotation is: true [2020-11-29 19:03:08,304 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-29 19:03:08,304 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 19:03:08,304 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 19:03:08,304 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-29 19:03:08,304 INFO L277 CegarLoopResult]: At program point L45(lines 45 47) the Hoare annotation is: true [2020-11-29 19:03:08,305 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-11-29 19:03:08,305 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-11-29 19:03:08,305 INFO L274 CegarLoopResult]: For program point L12-3(line 12) no Hoare annotation was computed. [2020-11-29 19:03:08,305 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 19:03:08,305 INFO L274 CegarLoopResult]: For program point L30(lines 30 34) no Hoare annotation was computed. [2020-11-29 19:03:08,305 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-11-29 19:03:08,305 INFO L274 CegarLoopResult]: For program point L39(lines 39 43) no Hoare annotation was computed. [2020-11-29 19:03:08,305 INFO L274 CegarLoopResult]: For program point L39-2(lines 24 49) no Hoare annotation was computed. [2020-11-29 19:03:08,305 INFO L274 CegarLoopResult]: For program point L35(lines 35 44) no Hoare annotation was computed. [2020-11-29 19:03:08,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:03:08 BoogieIcfgContainer [2020-11-29 19:03:08,314 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:03:08,314 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:03:08,315 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:03:08,315 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:03:08,315 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:03:02" (3/4) ... [2020-11-29 19:03:08,322 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 19:03:08,331 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-29 19:03:08,332 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-29 19:03:08,332 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 19:03:08,332 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 19:03:08,373 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a722eb36-0905-48ea-a9d4-76ecb389ec4a/bin/uautomizer/witness.graphml [2020-11-29 19:03:08,373 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:03:08,374 INFO L168 Benchmark]: Toolchain (without parser) took 6946.89 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 76.9 MB in the beginning and 99.3 MB in the end (delta: -22.4 MB). Peak memory consumption was 66.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:03:08,375 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 104.9 MB. Free memory was 61.3 MB in the beginning and 61.3 MB in the end (delta: 78.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:03:08,375 INFO L168 Benchmark]: CACSL2BoogieTranslator took 338.43 ms. Allocated memory is still 104.9 MB. Free memory was 76.9 MB in the beginning and 80.8 MB in the end (delta: -3.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:03:08,376 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.27 ms. Allocated memory is still 104.9 MB. Free memory was 80.8 MB in the beginning and 79.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:03:08,376 INFO L168 Benchmark]: Boogie Preprocessor took 20.08 ms. Allocated memory is still 104.9 MB. Free memory was 79.2 MB in the beginning and 78.5 MB in the end (delta: 778.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:03:08,377 INFO L168 Benchmark]: RCFGBuilder took 586.78 ms. Allocated memory is still 104.9 MB. Free memory was 78.5 MB in the beginning and 66.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 19:03:08,378 INFO L168 Benchmark]: TraceAbstraction took 5898.99 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 66.0 MB in the beginning and 33.2 MB in the end (delta: 32.8 MB). Peak memory consumption was 55.3 MB. Max. memory is 16.1 GB. [2020-11-29 19:03:08,378 INFO L168 Benchmark]: Witness Printer took 58.82 ms. Allocated memory is still 125.8 MB. Free memory was 33.2 MB in the beginning and 99.3 MB in the end (delta: -66.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:03:08,381 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 104.9 MB. Free memory was 61.3 MB in the beginning and 61.3 MB in the end (delta: 78.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 338.43 ms. Allocated memory is still 104.9 MB. Free memory was 76.9 MB in the beginning and 80.8 MB in the end (delta: -3.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.27 ms. Allocated memory is still 104.9 MB. Free memory was 80.8 MB in the beginning and 79.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.08 ms. Allocated memory is still 104.9 MB. Free memory was 79.2 MB in the beginning and 78.5 MB in the end (delta: 778.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 586.78 ms. Allocated memory is still 104.9 MB. Free memory was 78.5 MB in the beginning and 66.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5898.99 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 66.0 MB in the beginning and 33.2 MB in the end (delta: 32.8 MB). Peak memory consumption was 55.3 MB. Max. memory is 16.1 GB. * Witness Printer took 58.82 ms. Allocated memory is still 125.8 MB. Free memory was 33.2 MB in the beginning and 99.3 MB in the end (delta: -66.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.7s, OverallIterations: 8, TraceHistogramMax: 7, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 111 SDtfs, 67 SDslu, 404 SDs, 0 SdLazy, 450 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 165 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=6, 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, 8 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 228 NumberOfCodeBlocks, 228 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 215 ConstructedInterpolants, 0 QuantifiedInterpolants, 43714 SizeOfPredicates, 21 NumberOfNonLiveVariables, 467 ConjunctsInSsa, 133 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 36/216 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...