./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c71b5d54-0bf7-46a3-9334-cce73a614e41/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c71b5d54-0bf7-46a3-9334-cce73a614e41/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c71b5d54-0bf7-46a3-9334-cce73a614e41/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c71b5d54-0bf7-46a3-9334-cce73a614e41/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c71b5d54-0bf7-46a3-9334-cce73a614e41/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c71b5d54-0bf7-46a3-9334-cce73a614e41/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 a8da7bb6495346e44a0ef3b7d50d5e0fbdae8843 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:27:52,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:27:52,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:27:52,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:27:52,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:27:52,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:27:52,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:27:52,668 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:27:52,670 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:27:52,672 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:27:52,673 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:27:52,675 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:27:52,675 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:27:52,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:27:52,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:27:52,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:27:52,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:27:52,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:27:52,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:27:52,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:27:52,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:27:52,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:27:52,699 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:27:52,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:27:52,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:27:52,708 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:27:52,709 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:27:52,713 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:27:52,714 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:27:52,715 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:27:52,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:27:52,716 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:27:52,716 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:27:52,717 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:27:52,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:27:52,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:27:52,719 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:27:52,719 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:27:52,720 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:27:52,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:27:52,721 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:27:52,727 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c71b5d54-0bf7-46a3-9334-cce73a614e41/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 01:27:52,770 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:27:52,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:27:52,773 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:27:52,773 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:27:52,773 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 01:27:52,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:27:52,774 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:27:52,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:27:52,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:27:52,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:27:52,776 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:27:52,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:27:52,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:27:52,777 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:27:52,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:27:52,777 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:27:52,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:27:52,778 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:27:52,778 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:27:52,778 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:27:52,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:27:52,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:27:52,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:27:52,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:27:52,779 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:27:52,779 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 01:27:52,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:27:52,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:27:52,780 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:27:52,780 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_c71b5d54-0bf7-46a3-9334-cce73a614e41/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c71b5d54-0bf7-46a3-9334-cce73a614e41/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8da7bb6495346e44a0ef3b7d50d5e0fbdae8843 [2020-11-30 01:27:53,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:27:53,065 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:27:53,067 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:27:53,069 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:27:53,071 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:27:53,072 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c71b5d54-0bf7-46a3-9334-cce73a614e41/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound1.c [2020-11-30 01:27:53,177 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c71b5d54-0bf7-46a3-9334-cce73a614e41/bin/uautomizer/data/abe2911d6/57bfe6fd9d024cf4a6e61214c7dde0d6/FLAGf1664bb63 [2020-11-30 01:27:53,677 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:27:53,678 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c71b5d54-0bf7-46a3-9334-cce73a614e41/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound1.c [2020-11-30 01:27:53,686 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c71b5d54-0bf7-46a3-9334-cce73a614e41/bin/uautomizer/data/abe2911d6/57bfe6fd9d024cf4a6e61214c7dde0d6/FLAGf1664bb63 [2020-11-30 01:27:54,055 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c71b5d54-0bf7-46a3-9334-cce73a614e41/bin/uautomizer/data/abe2911d6/57bfe6fd9d024cf4a6e61214c7dde0d6 [2020-11-30 01:27:54,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:27:54,060 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:27:54,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:27:54,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:27:54,071 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:27:54,072 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:27:54" (1/1) ... [2020-11-30 01:27:54,077 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@670c5ccc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:27:54, skipping insertion in model container [2020-11-30 01:27:54,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:27:54" (1/1) ... [2020-11-30 01:27:54,085 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:27:54,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:27:54,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:27:54,303 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:27:54,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:27:54,337 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:27:54,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:27:54 WrapperNode [2020-11-30 01:27:54,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:27:54,339 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:27:54,339 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:27:54,339 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:27:54,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:27:54" (1/1) ... [2020-11-30 01:27:54,353 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:27:54" (1/1) ... [2020-11-30 01:27:54,372 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:27:54,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:27:54,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:27:54,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:27:54,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:27:54" (1/1) ... [2020-11-30 01:27:54,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:27:54" (1/1) ... [2020-11-30 01:27:54,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:27:54" (1/1) ... [2020-11-30 01:27:54,383 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:27:54" (1/1) ... [2020-11-30 01:27:54,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:27:54" (1/1) ... [2020-11-30 01:27:54,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:27:54" (1/1) ... [2020-11-30 01:27:54,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:27:54" (1/1) ... [2020-11-30 01:27:54,396 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:27:54,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:27:54,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:27:54,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:27:54,399 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:27:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c71b5d54-0bf7-46a3-9334-cce73a614e41/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 [2020-11-30 01:27:54,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:27:54,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:27:54,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:27:54,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:27:54,753 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:27:54,753 INFO L298 CfgBuilder]: Removed 29 assume(true) statements. [2020-11-30 01:27:54,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:27:54 BoogieIcfgContainer [2020-11-30 01:27:54,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:27:54,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:27:54,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:27:54,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:27:54,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:27:54" (1/3) ... [2020-11-30 01:27:54,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c940306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:27:54, skipping insertion in model container [2020-11-30 01:27:54,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:27:54" (2/3) ... [2020-11-30 01:27:54,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c940306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:27:54, skipping insertion in model container [2020-11-30 01:27:54,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:27:54" (3/3) ... [2020-11-30 01:27:54,764 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound1.c [2020-11-30 01:27:54,775 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:27:54,780 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-11-30 01:27:54,792 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-11-30 01:27:54,816 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:27:54,816 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:27:54,816 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:27:54,816 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:27:54,816 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:27:54,817 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:27:54,817 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:27:54,817 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:27:54,831 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-11-30 01:27:54,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 01:27:54,835 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:54,836 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 01:27:54,837 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:54,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:54,843 INFO L82 PathProgramCache]: Analyzing trace with hash 891015143, now seen corresponding path program 1 times [2020-11-30 01:27:54,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:54,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760759456] [2020-11-30 01:27:54,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:27:54,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:27:54,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760759456] [2020-11-30 01:27:54,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:27:54,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:27:54,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693850651] [2020-11-30 01:27:55,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 01:27:55,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:55,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 01:27:55,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:27:55,017 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-11-30 01:27:55,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:55,035 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2020-11-30 01:27:55,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 01:27:55,036 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-30 01:27:55,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:55,044 INFO L225 Difference]: With dead ends: 62 [2020-11-30 01:27:55,044 INFO L226 Difference]: Without dead ends: 28 [2020-11-30 01:27:55,047 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 [2020-11-30 01:27:55,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-30 01:27:55,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-30 01:27:55,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-30 01:27:55,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-11-30 01:27:55,087 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 6 [2020-11-30 01:27:55,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:27:55,087 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-11-30 01:27:55,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 01:27:55,088 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-11-30 01:27:55,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 01:27:55,089 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:55,089 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 01:27:55,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:27:55,090 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:55,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:55,094 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-11-30 01:27:55,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:55,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56927310] [2020-11-30 01:27:55,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:27:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:27:55,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56927310] [2020-11-30 01:27:55,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:27:55,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 01:27:55,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761764469] [2020-11-30 01:27:55,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:27:55,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:55,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:27:55,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:27:55,328 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 4 states. [2020-11-30 01:27:55,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:55,490 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-11-30 01:27:55,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:27:55,491 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-30 01:27:55,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:55,493 INFO L225 Difference]: With dead ends: 55 [2020-11-30 01:27:55,493 INFO L226 Difference]: Without dead ends: 51 [2020-11-30 01:27:55,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:27:55,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-30 01:27:55,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2020-11-30 01:27:55,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-30 01:27:55,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-11-30 01:27:55,514 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 6 [2020-11-30 01:27:55,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:27:55,514 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-11-30 01:27:55,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:27:55,515 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-11-30 01:27:55,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 01:27:55,516 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:55,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:27:55,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:27:55,522 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:55,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:55,522 INFO L82 PathProgramCache]: Analyzing trace with hash 179688749, now seen corresponding path program 1 times [2020-11-30 01:27:55,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:55,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148725694] [2020-11-30 01:27:55,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:55,544 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:27:55,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519839897] [2020-11-30 01:27:55,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c71b5d54-0bf7-46a3-9334-cce73a614e41/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 [2020-11-30 01:27:55,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:27:55,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 01:27:55,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:27:55,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:27:55,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148725694] [2020-11-30 01:27:55,685 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:27:55,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519839897] [2020-11-30 01:27:55,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:27:55,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 01:27:55,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155595095] [2020-11-30 01:27:55,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:27:55,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:55,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:27:55,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:27:55,687 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 4 states. [2020-11-30 01:27:55,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:55,802 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-11-30 01:27:55,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:27:55,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-30 01:27:55,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:55,804 INFO L225 Difference]: With dead ends: 50 [2020-11-30 01:27:55,804 INFO L226 Difference]: Without dead ends: 46 [2020-11-30 01:27:55,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:27:55,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-30 01:27:55,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-11-30 01:27:55,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-30 01:27:55,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-11-30 01:27:55,821 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 8 [2020-11-30 01:27:55,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:27:55,821 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-11-30 01:27:55,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:27:55,822 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-11-30 01:27:55,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 01:27:55,824 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:55,824 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:27:56,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-30 01:27:56,050 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:56,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:56,050 INFO L82 PathProgramCache]: Analyzing trace with hash 882382672, now seen corresponding path program 1 times [2020-11-30 01:27:56,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:56,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104817957] [2020-11-30 01:27:56,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:56,063 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:27:56,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605775662] [2020-11-30 01:27:56,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c71b5d54-0bf7-46a3-9334-cce73a614e41/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 [2020-11-30 01:27:56,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:27:56,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 01:27:56,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:27:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:27:56,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104817957] [2020-11-30 01:27:56,164 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:27:56,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605775662] [2020-11-30 01:27:56,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:27:56,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 01:27:56,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766300511] [2020-11-30 01:27:56,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:27:56,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:56,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:27:56,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:27:56,166 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 4 states. [2020-11-30 01:27:56,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:56,279 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-11-30 01:27:56,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:27:56,280 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-30 01:27:56,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:56,281 INFO L225 Difference]: With dead ends: 50 [2020-11-30 01:27:56,281 INFO L226 Difference]: Without dead ends: 39 [2020-11-30 01:27:56,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:27:56,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-30 01:27:56,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-11-30 01:27:56,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-30 01:27:56,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-11-30 01:27:56,289 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 10 [2020-11-30 01:27:56,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:27:56,289 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-11-30 01:27:56,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:27:56,289 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-11-30 01:27:56,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 01:27:56,292 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:56,293 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:27:56,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:27:56,494 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:56,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:56,494 INFO L82 PathProgramCache]: Analyzing trace with hash 2079810332, now seen corresponding path program 1 times [2020-11-30 01:27:56,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:56,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115437620] [2020-11-30 01:27:56,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:56,506 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:27:56,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1989690449] [2020-11-30 01:27:56,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c71b5d54-0bf7-46a3-9334-cce73a614e41/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 [2020-11-30 01:27:56,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:27:56,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 01:27:56,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:27:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:27:56,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115437620] [2020-11-30 01:27:56,616 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:27:56,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989690449] [2020-11-30 01:27:56,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:27:56,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-11-30 01:27:56,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238537964] [2020-11-30 01:27:56,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:27:56,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:56,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:27:56,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:27:56,618 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 5 states. [2020-11-30 01:27:56,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:56,656 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2020-11-30 01:27:56,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:27:56,657 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-11-30 01:27:56,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:56,658 INFO L225 Difference]: With dead ends: 50 [2020-11-30 01:27:56,658 INFO L226 Difference]: Without dead ends: 24 [2020-11-30 01:27:56,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:27:56,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-30 01:27:56,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-30 01:27:56,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 01:27:56,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 23 transitions. [2020-11-30 01:27:56,664 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 23 transitions. Word has length 14 [2020-11-30 01:27:56,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:27:56,664 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 23 transitions. [2020-11-30 01:27:56,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:27:56,665 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 23 transitions. [2020-11-30 01:27:56,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 01:27:56,665 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:56,666 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:27:56,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:27:56,867 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:56,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:56,867 INFO L82 PathProgramCache]: Analyzing trace with hash 49592034, now seen corresponding path program 1 times [2020-11-30 01:27:56,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:56,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844149607] [2020-11-30 01:27:56,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:56,878 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:27:56,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1324937893] [2020-11-30 01:27:56,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c71b5d54-0bf7-46a3-9334-cce73a614e41/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 [2020-11-30 01:27:56,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:27:56,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 01:27:56,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:27:56,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:27:56,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844149607] [2020-11-30 01:27:56,968 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:27:56,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324937893] [2020-11-30 01:27:56,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:27:56,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-30 01:27:56,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992929642] [2020-11-30 01:27:56,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:27:56,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:56,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:27:56,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:27:56,970 INFO L87 Difference]: Start difference. First operand 24 states and 23 transitions. Second operand 5 states. [2020-11-30 01:27:57,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:57,038 INFO L93 Difference]: Finished difference Result 24 states and 23 transitions. [2020-11-30 01:27:57,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:27:57,039 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-11-30 01:27:57,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:57,039 INFO L225 Difference]: With dead ends: 24 [2020-11-30 01:27:57,040 INFO L226 Difference]: Without dead ends: 22 [2020-11-30 01:27:57,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:27:57,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-30 01:27:57,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-30 01:27:57,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-30 01:27:57,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 21 transitions. [2020-11-30 01:27:57,044 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 21 transitions. Word has length 15 [2020-11-30 01:27:57,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:27:57,044 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 21 transitions. [2020-11-30 01:27:57,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:27:57,045 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 21 transitions. [2020-11-30 01:27:57,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 01:27:57,045 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:57,045 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:27:57,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:27:57,258 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:57,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:57,258 INFO L82 PathProgramCache]: Analyzing trace with hash 413492165, now seen corresponding path program 1 times [2020-11-30 01:27:57,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:57,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420047121] [2020-11-30 01:27:57,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:57,275 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:27:57,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232250168] [2020-11-30 01:27:57,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c71b5d54-0bf7-46a3-9334-cce73a614e41/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 [2020-11-30 01:27:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:27:57,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-30 01:27:57,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:27:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:27:57,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420047121] [2020-11-30 01:27:57,400 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:27:57,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232250168] [2020-11-30 01:27:57,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:27:57,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-30 01:27:57,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533350183] [2020-11-30 01:27:57,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:27:57,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:57,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:27:57,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:27:57,402 INFO L87 Difference]: Start difference. First operand 22 states and 21 transitions. Second operand 5 states. [2020-11-30 01:27:57,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:57,458 INFO L93 Difference]: Finished difference Result 22 states and 21 transitions. [2020-11-30 01:27:57,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:27:57,458 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-11-30 01:27:57,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:57,459 INFO L225 Difference]: With dead ends: 22 [2020-11-30 01:27:57,459 INFO L226 Difference]: Without dead ends: 20 [2020-11-30 01:27:57,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:27:57,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-30 01:27:57,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-30 01:27:57,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-30 01:27:57,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 19 transitions. [2020-11-30 01:27:57,463 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 19 transitions. Word has length 17 [2020-11-30 01:27:57,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:27:57,464 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 19 transitions. [2020-11-30 01:27:57,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:27:57,464 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 19 transitions. [2020-11-30 01:27:57,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-30 01:27:57,465 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:57,465 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:27:57,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-30 01:27:57,682 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:57,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:57,682 INFO L82 PathProgramCache]: Analyzing trace with hash -2065799832, now seen corresponding path program 1 times [2020-11-30 01:27:57,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:57,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178452470] [2020-11-30 01:27:57,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:57,692 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:27:57,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1972051959] [2020-11-30 01:27:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c71b5d54-0bf7-46a3-9334-cce73a614e41/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 [2020-11-30 01:27:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:27:57,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 01:27:57,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:27:57,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:27:57,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178452470] [2020-11-30 01:27:57,791 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:27:57,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972051959] [2020-11-30 01:27:57,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:27:57,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-30 01:27:57,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557804145] [2020-11-30 01:27:57,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:27:57,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:57,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:27:57,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:27:57,793 INFO L87 Difference]: Start difference. First operand 20 states and 19 transitions. Second operand 5 states. [2020-11-30 01:27:57,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:57,854 INFO L93 Difference]: Finished difference Result 20 states and 19 transitions. [2020-11-30 01:27:57,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:27:57,854 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-11-30 01:27:57,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:57,855 INFO L225 Difference]: With dead ends: 20 [2020-11-30 01:27:57,855 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 01:27:57,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:27:57,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 01:27:57,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 01:27:57,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 01:27:57,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 01:27:57,856 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-11-30 01:27:57,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:27:57,857 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 01:27:57,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:27:57,857 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 01:27:57,857 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 01:27:58,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:27:58,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-30 01:27:58,412 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-11-30 01:27:58,413 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-11-30 01:27:58,413 INFO L277 CegarLoopResult]: At program point L48(lines 21 49) the Hoare annotation is: true [2020-11-30 01:27:58,413 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-30 01:27:58,413 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-11-30 01:27:58,413 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-30 01:27:58,413 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-30 01:27:58,414 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-11-30 01:27:58,414 INFO L274 CegarLoopResult]: For program point L12(lines 12 15) no Hoare annotation was computed. [2020-11-30 01:27:58,414 INFO L270 CegarLoopResult]: At program point L12-1(lines 11 17) the Hoare annotation is: (and (<= 1 ~counter~0) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~s~0 1) (= ULTIMATE.start_main_~a~0 0) (= ULTIMATE.start_main_~t~0 1)) [2020-11-30 01:27:58,414 INFO L274 CegarLoopResult]: For program point L12-2(lines 12 15) no Hoare annotation was computed. [2020-11-30 01:27:58,414 INFO L270 CegarLoopResult]: At program point L12-3(lines 11 17) the Hoare annotation is: (and (<= 1 ~counter~0) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~s~0 1) (= ULTIMATE.start_main_~a~0 0) (= ULTIMATE.start_main_~t~0 1)) [2020-11-30 01:27:58,414 INFO L274 CegarLoopResult]: For program point L12-4(lines 12 15) no Hoare annotation was computed. [2020-11-30 01:27:58,415 INFO L270 CegarLoopResult]: At program point L12-5(lines 36 37) the Hoare annotation is: (and (<= 1 ~counter~0) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~s~0 1) (= ULTIMATE.start_main_~a~0 0) (= ULTIMATE.start_main_~t~0 1)) [2020-11-30 01:27:58,415 INFO L274 CegarLoopResult]: For program point L12-6(lines 12 15) no Hoare annotation was computed. [2020-11-30 01:27:58,415 INFO L270 CegarLoopResult]: At program point L12-7(lines 11 17) the Hoare annotation is: (or (and (<= 1 ~counter~0) (= ULTIMATE.start_main_~a~0 1) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~t~0 3) (= ULTIMATE.start_main_~s~0 (+ ULTIMATE.start_main_~t~0 1))) (and (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (= ULTIMATE.start_main_~s~0 1) (= ULTIMATE.start_main_~a~0 0) (= ULTIMATE.start_main_~t~0 1))) [2020-11-30 01:27:58,415 INFO L274 CegarLoopResult]: For program point L12-8(lines 12 15) no Hoare annotation was computed. [2020-11-30 01:27:58,416 INFO L270 CegarLoopResult]: At program point L12-9(lines 11 17) the Hoare annotation is: (or (and (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (= ULTIMATE.start_main_~s~0 1) (= ULTIMATE.start_main_~t~0 1)) (and (<= 1 ~counter~0) (= ULTIMATE.start_main_~a~0 1) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~t~0 3) (= ULTIMATE.start_main_~s~0 (+ ULTIMATE.start_main_~t~0 1)))) [2020-11-30 01:27:58,416 INFO L274 CegarLoopResult]: For program point L12-10(lines 12 15) no Hoare annotation was computed. [2020-11-30 01:27:58,416 INFO L277 CegarLoopResult]: At program point L12-11(lines 11 17) the Hoare annotation is: true [2020-11-30 01:27:58,416 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-30 01:27:58,416 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-11-30 01:27:58,416 INFO L274 CegarLoopResult]: For program point L13(lines 13 14) no Hoare annotation was computed. [2020-11-30 01:27:58,416 INFO L274 CegarLoopResult]: For program point L13-1(lines 13 14) no Hoare annotation was computed. [2020-11-30 01:27:58,417 INFO L274 CegarLoopResult]: For program point L13-2(lines 13 14) no Hoare annotation was computed. [2020-11-30 01:27:58,417 INFO L274 CegarLoopResult]: For program point L13-3(lines 13 14) no Hoare annotation was computed. [2020-11-30 01:27:58,417 INFO L274 CegarLoopResult]: For program point L13-4(lines 13 14) no Hoare annotation was computed. [2020-11-30 01:27:58,417 INFO L274 CegarLoopResult]: For program point L13-5(lines 13 14) no Hoare annotation was computed. [2020-11-30 01:27:58,417 INFO L274 CegarLoopResult]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2020-11-30 01:27:58,417 INFO L270 CegarLoopResult]: At program point L30-3(lines 30 42) the Hoare annotation is: (or (and (= ULTIMATE.start_main_~s~0 1) (= ULTIMATE.start_main_~a~0 0) (= ULTIMATE.start_main_~t~0 1) (<= 0 ~counter~0)) (and (<= 1 ~counter~0) (= ULTIMATE.start_main_~a~0 1) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~t~0 3) (= ULTIMATE.start_main_~s~0 (+ ULTIMATE.start_main_~t~0 1)))) [2020-11-30 01:27:58,418 INFO L274 CegarLoopResult]: For program point L30-4(lines 30 42) no Hoare annotation was computed. [2020-11-30 01:27:58,418 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-11-30 01:27:58,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:27:58 BoogieIcfgContainer [2020-11-30 01:27:58,445 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:27:58,446 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:27:58,446 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:27:58,446 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:27:58,447 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:27:54" (3/4) ... [2020-11-30 01:27:58,450 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 01:27:58,460 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2020-11-30 01:27:58,461 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-30 01:27:58,461 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 01:27:58,461 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 01:27:58,504 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c71b5d54-0bf7-46a3-9334-cce73a614e41/bin/uautomizer/witness.graphml [2020-11-30 01:27:58,505 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:27:58,506 INFO L168 Benchmark]: Toolchain (without parser) took 4445.48 ms. Allocated memory was 92.3 MB in the beginning and 146.8 MB in the end (delta: 54.5 MB). Free memory was 66.1 MB in the beginning and 110.2 MB in the end (delta: -44.1 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. [2020-11-30 01:27:58,507 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 92.3 MB. Free memory was 51.8 MB in the beginning and 51.7 MB in the end (delta: 56.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:27:58,508 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.31 ms. Allocated memory was 92.3 MB in the beginning and 121.6 MB in the end (delta: 29.4 MB). Free memory was 65.9 MB in the beginning and 98.6 MB in the end (delta: -32.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:27:58,508 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.61 ms. Allocated memory is still 121.6 MB. Free memory was 98.6 MB in the beginning and 97.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:27:58,509 INFO L168 Benchmark]: Boogie Preprocessor took 23.37 ms. Allocated memory is still 121.6 MB. Free memory was 97.3 MB in the beginning and 96.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:27:58,522 INFO L168 Benchmark]: RCFGBuilder took 357.89 ms. Allocated memory is still 121.6 MB. Free memory was 96.1 MB in the beginning and 82.2 MB in the end (delta: 13.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-30 01:27:58,522 INFO L168 Benchmark]: TraceAbstraction took 3688.61 ms. Allocated memory was 121.6 MB in the beginning and 146.8 MB in the end (delta: 25.2 MB). Free memory was 81.8 MB in the beginning and 113.3 MB in the end (delta: -31.5 MB). Peak memory consumption was 42.8 MB. Max. memory is 16.1 GB. [2020-11-30 01:27:58,523 INFO L168 Benchmark]: Witness Printer took 58.82 ms. Allocated memory is still 146.8 MB. Free memory was 113.3 MB in the beginning and 110.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:27:58,526 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 92.3 MB. Free memory was 51.8 MB in the beginning and 51.7 MB in the end (delta: 56.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 271.31 ms. Allocated memory was 92.3 MB in the beginning and 121.6 MB in the end (delta: 29.4 MB). Free memory was 65.9 MB in the beginning and 98.6 MB in the end (delta: -32.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.61 ms. Allocated memory is still 121.6 MB. Free memory was 98.6 MB in the beginning and 97.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.37 ms. Allocated memory is still 121.6 MB. Free memory was 97.3 MB in the beginning and 96.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 357.89 ms. Allocated memory is still 121.6 MB. Free memory was 96.1 MB in the beginning and 82.2 MB in the end (delta: 13.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3688.61 ms. Allocated memory was 121.6 MB in the beginning and 146.8 MB in the end (delta: 25.2 MB). Free memory was 81.8 MB in the beginning and 113.3 MB in the end (delta: -31.5 MB). Peak memory consumption was 42.8 MB. Max. memory is 16.1 GB. * Witness Printer took 58.82 ms. Allocated memory is still 146.8 MB. Free memory was 113.3 MB in the beginning and 110.2 MB in the end (delta: 3.1 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: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: ((((1 <= counter && a == 1) && 1 <= cond) && t == 3) && s == t + 1) || (((!(0 == cond) && s == 1) && a == 0) && t == 1) - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: (((1 <= counter && 1 <= cond) && s == 1) && a == 0) && t == 1 - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: (((s == 1 && a == 0) && t == 1) && 0 <= counter) || ((((1 <= counter && a == 1) && 1 <= cond) && t == 3) && s == t + 1) - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((1 <= counter && 1 <= cond) && s == 1) && a == 0) && t == 1 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: ((!(0 == cond) && s == 1) && t == 1) || ((((1 <= counter && a == 1) && 1 <= cond) && t == 3) && s == t + 1) - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: (((1 <= counter && 1 <= cond) && s == 1) && a == 0) && t == 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.2s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 147 SDtfs, 94 SDslu, 155 SDs, 0 SdLazy, 192 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=3, 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, 22 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 19 NumberOfFragments, 145 HoareAnnotationTreeSize, 8 FomulaSimplifications, 145 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 81 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 95 NumberOfCodeBlocks, 95 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 87 ConstructedInterpolants, 0 QuantifiedInterpolants, 6594 SizeOfPredicates, 22 NumberOfNonLiveVariables, 468 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 2/9 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...