./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.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_c8f9a026-6fcd-4c2a-90f2-d33d59d5e6e7/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c8f9a026-6fcd-4c2a-90f2-d33d59d5e6e7/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c8f9a026-6fcd-4c2a-90f2-d33d59d5e6e7/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c8f9a026-6fcd-4c2a-90f2-d33d59d5e6e7/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c8f9a026-6fcd-4c2a-90f2-d33d59d5e6e7/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c8f9a026-6fcd-4c2a-90f2-d33d59d5e6e7/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 fbde2b4d8590a43f5f4c36a2fa025463c4b5fc0a ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:05:24,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:05:24,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:05:24,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:05:24,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:05:24,841 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:05:24,843 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:05:24,845 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:05:24,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:05:24,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:05:24,850 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:05:24,851 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:05:24,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:05:24,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:05:24,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:05:24,856 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:05:24,857 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:05:24,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:05:24,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:05:24,863 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:05:24,865 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:05:24,867 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:05:24,868 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:05:24,869 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:05:24,873 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:05:24,873 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:05:24,874 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:05:24,875 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:05:24,875 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:05:24,877 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:05:24,877 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:05:24,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:05:24,879 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:05:24,880 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:05:24,881 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:05:24,882 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:05:24,883 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:05:24,883 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:05:24,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:05:24,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:05:24,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:05:24,886 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c8f9a026-6fcd-4c2a-90f2-d33d59d5e6e7/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:05:24,908 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:05:24,909 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:05:24,910 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:05:24,910 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:05:24,911 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:05:24,911 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:05:24,911 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:05:24,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:05:24,912 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:05:24,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:05:24,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:05:24,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:05:24,913 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:05:24,913 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:05:24,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:05:24,914 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:05:24,914 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:05:24,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:05:24,915 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:05:24,915 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:05:24,916 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:05:24,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:05:24,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:05:24,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:05:24,917 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:05:24,917 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:05:24,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:05:24,918 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:05:24,918 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:05:24,918 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_c8f9a026-6fcd-4c2a-90f2-d33d59d5e6e7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c8f9a026-6fcd-4c2a-90f2-d33d59d5e6e7/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbde2b4d8590a43f5f4c36a2fa025463c4b5fc0a [2020-11-28 03:05:25,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:05:25,220 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:05:25,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:05:25,224 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:05:25,226 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:05:25,226 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c8f9a026-6fcd-4c2a-90f2-d33d59d5e6e7/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c [2020-11-28 03:05:25,303 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c8f9a026-6fcd-4c2a-90f2-d33d59d5e6e7/bin/uautomizer/data/0dc75baec/44dfd17d8bb14cf7b61ab54deb86ac9e/FLAG509d32fd6 [2020-11-28 03:05:25,777 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:05:25,777 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c8f9a026-6fcd-4c2a-90f2-d33d59d5e6e7/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c [2020-11-28 03:05:25,783 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c8f9a026-6fcd-4c2a-90f2-d33d59d5e6e7/bin/uautomizer/data/0dc75baec/44dfd17d8bb14cf7b61ab54deb86ac9e/FLAG509d32fd6 [2020-11-28 03:05:26,157 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c8f9a026-6fcd-4c2a-90f2-d33d59d5e6e7/bin/uautomizer/data/0dc75baec/44dfd17d8bb14cf7b61ab54deb86ac9e [2020-11-28 03:05:26,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:05:26,162 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:05:26,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:05:26,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:05:26,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:05:26,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:05:26" (1/1) ... [2020-11-28 03:05:26,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eeb5826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:26, skipping insertion in model container [2020-11-28 03:05:26,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:05:26" (1/1) ... [2020-11-28 03:05:26,188 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:05:26,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:05:26,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:05:26,422 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:05:26,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:05:26,455 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:05:26,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:26 WrapperNode [2020-11-28 03:05:26,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:05:26,457 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:05:26,457 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:05:26,457 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:05:26,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:26" (1/1) ... [2020-11-28 03:05:26,470 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:26" (1/1) ... [2020-11-28 03:05:26,488 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:05:26,489 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:05:26,489 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:05:26,489 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:05:26,496 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:26" (1/1) ... [2020-11-28 03:05:26,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:26" (1/1) ... [2020-11-28 03:05:26,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:26" (1/1) ... [2020-11-28 03:05:26,498 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:26" (1/1) ... [2020-11-28 03:05:26,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:26" (1/1) ... [2020-11-28 03:05:26,506 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:26" (1/1) ... [2020-11-28 03:05:26,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:26" (1/1) ... [2020-11-28 03:05:26,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:05:26,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:05:26,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:05:26,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:05:26,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8f9a026-6fcd-4c2a-90f2-d33d59d5e6e7/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 [2020-11-28 03:05:26,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:05:26,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:05:26,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:05:26,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:05:26,881 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:05:26,881 INFO L298 CfgBuilder]: Removed 17 assume(true) statements. [2020-11-28 03:05:26,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:05:26 BoogieIcfgContainer [2020-11-28 03:05:26,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:05:26,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:05:26,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:05:26,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:05:26,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:05:26" (1/3) ... [2020-11-28 03:05:26,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ae34774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:05:26, skipping insertion in model container [2020-11-28 03:05:26,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:26" (2/3) ... [2020-11-28 03:05:26,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ae34774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:05:26, skipping insertion in model container [2020-11-28 03:05:26,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:05:26" (3/3) ... [2020-11-28 03:05:26,901 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound2.c [2020-11-28 03:05:26,910 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:05:26,913 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-28 03:05:26,923 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-28 03:05:26,942 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:05:26,942 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:05:26,942 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:05:26,942 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:05:26,943 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:05:26,943 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:05:26,943 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:05:26,943 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:05:26,956 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-11-28 03:05:26,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 03:05:26,961 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:05:26,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:05:26,962 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:05:26,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:05:26,967 INFO L82 PathProgramCache]: Analyzing trace with hash -594062832, now seen corresponding path program 1 times [2020-11-28 03:05:26,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:05:26,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565229882] [2020-11-28 03:05:26,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:05:27,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:05:27,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:05:27,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565229882] [2020-11-28 03:05:27,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:05:27,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 03:05:27,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618007783] [2020-11-28 03:05:27,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 03:05:27,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:05:27,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 03:05:27,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 03:05:27,128 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-11-28 03:05:27,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:05:27,147 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2020-11-28 03:05:27,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 03:05:27,148 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-11-28 03:05:27,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:05:27,161 INFO L225 Difference]: With dead ends: 39 [2020-11-28 03:05:27,161 INFO L226 Difference]: Without dead ends: 17 [2020-11-28 03:05:27,165 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 [2020-11-28 03:05:27,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-28 03:05:27,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-28 03:05:27,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-28 03:05:27,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-11-28 03:05:27,211 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2020-11-28 03:05:27,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:05:27,212 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-11-28 03:05:27,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 03:05:27,212 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-11-28 03:05:27,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 03:05:27,213 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:05:27,213 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:05:27,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:05:27,214 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:05:27,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:05:27,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1182791572, now seen corresponding path program 1 times [2020-11-28 03:05:27,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:05:27,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322572772] [2020-11-28 03:05:27,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:05:27,273 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:05:27,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993999421] [2020-11-28 03:05:27,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8f9a026-6fcd-4c2a-90f2-d33d59d5e6e7/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 [2020-11-28 03:05:27,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:05:27,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-28 03:05:27,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:05:27,508 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-28 03:05:27,508 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:05:27,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:05:27,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322572772] [2020-11-28 03:05:27,607 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:05:27,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993999421] [2020-11-28 03:05:27,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:05:27,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-28 03:05:27,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028878949] [2020-11-28 03:05:27,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:05:27,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:05:27,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:05:27,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:05:27,611 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 6 states. [2020-11-28 03:05:27,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:05:27,846 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-11-28 03:05:27,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 03:05:27,846 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-11-28 03:05:27,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:05:27,847 INFO L225 Difference]: With dead ends: 29 [2020-11-28 03:05:27,847 INFO L226 Difference]: Without dead ends: 23 [2020-11-28 03:05:27,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:05:27,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-28 03:05:27,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-11-28 03:05:27,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-28 03:05:27,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-11-28 03:05:27,854 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 9 [2020-11-28 03:05:27,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:05:27,854 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-11-28 03:05:27,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:05:27,855 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-11-28 03:05:27,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 03:05:27,858 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:05:27,858 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:05:28,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-28 03:05:28,070 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:05:28,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:05:28,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1122200418, now seen corresponding path program 1 times [2020-11-28 03:05:28,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:05:28,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826497733] [2020-11-28 03:05:28,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:05:28,090 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:05:28,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100003263] [2020-11-28 03:05:28,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8f9a026-6fcd-4c2a-90f2-d33d59d5e6e7/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 [2020-11-28 03:05:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:05:28,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-28 03:05:28,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:05:28,187 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-28 03:05:28,187 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:05:28,291 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-28 03:05:28,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:05:28,514 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:05:28,520 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-28 03:05:28,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:05:28,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826497733] [2020-11-28 03:05:28,565 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:05:28,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100003263] [2020-11-28 03:05:28,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:05:28,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-28 03:05:28,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47592120] [2020-11-28 03:05:28,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 03:05:28,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:05:28,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 03:05:28,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:05:28,568 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 11 states. [2020-11-28 03:05:28,984 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2020-11-28 03:05:29,200 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2020-11-28 03:05:29,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:05:29,313 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-11-28 03:05:29,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 03:05:29,314 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-28 03:05:29,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:05:29,315 INFO L225 Difference]: With dead ends: 39 [2020-11-28 03:05:29,315 INFO L226 Difference]: Without dead ends: 19 [2020-11-28 03:05:29,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2020-11-28 03:05:29,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-28 03:05:29,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-28 03:05:29,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-28 03:05:29,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-11-28 03:05:29,320 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2020-11-28 03:05:29,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:05:29,321 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-11-28 03:05:29,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 03:05:29,321 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-11-28 03:05:29,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-28 03:05:29,322 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:05:29,322 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:05:29,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:05:29,523 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:05:29,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:05:29,524 INFO L82 PathProgramCache]: Analyzing trace with hash -250706221, now seen corresponding path program 1 times [2020-11-28 03:05:29,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:05:29,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129940874] [2020-11-28 03:05:29,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:05:29,549 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:05:29,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548349649] [2020-11-28 03:05:29,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8f9a026-6fcd-4c2a-90f2-d33d59d5e6e7/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 [2020-11-28 03:05:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:05:29,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-28 03:05:29,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:05:29,870 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:05:29,872 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-28 03:05:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:05:29,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129940874] [2020-11-28 03:05:29,924 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:05:29,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548349649] [2020-11-28 03:05:29,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:05:29,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-28 03:05:29,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523277536] [2020-11-28 03:05:29,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 03:05:29,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:05:29,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 03:05:29,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:05:29,926 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 9 states. [2020-11-28 03:05:30,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:05:30,122 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-11-28 03:05:30,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 03:05:30,123 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-11-28 03:05:30,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:05:30,124 INFO L225 Difference]: With dead ends: 30 [2020-11-28 03:05:30,124 INFO L226 Difference]: Without dead ends: 26 [2020-11-28 03:05:30,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:05:30,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-28 03:05:30,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-11-28 03:05:30,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-28 03:05:30,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-11-28 03:05:30,129 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 17 [2020-11-28 03:05:30,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:05:30,130 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-11-28 03:05:30,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 03:05:30,130 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-11-28 03:05:30,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 03:05:30,131 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:05:30,131 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:05:30,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:05:30,332 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:05:30,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:05:30,332 INFO L82 PathProgramCache]: Analyzing trace with hash -609342175, now seen corresponding path program 1 times [2020-11-28 03:05:30,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:05:30,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104081526] [2020-11-28 03:05:30,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:05:30,345 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:05:30,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964816658] [2020-11-28 03:05:30,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8f9a026-6fcd-4c2a-90f2-d33d59d5e6e7/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 [2020-11-28 03:05:30,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:05:30,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 03:05:30,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:05:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:05:30,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104081526] [2020-11-28 03:05:30,582 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:05:30,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964816658] [2020-11-28 03:05:30,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:05:30,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-28 03:05:30,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359375848] [2020-11-28 03:05:30,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:05:30,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:05:30,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:05:30,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:05:30,585 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2020-11-28 03:05:30,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:05:30,705 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-11-28 03:05:30,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:05:30,707 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-11-28 03:05:30,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:05:30,708 INFO L225 Difference]: With dead ends: 34 [2020-11-28 03:05:30,708 INFO L226 Difference]: Without dead ends: 30 [2020-11-28 03:05:30,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:05:30,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-28 03:05:30,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-11-28 03:05:30,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-28 03:05:30,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-11-28 03:05:30,713 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-11-28 03:05:30,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:05:30,714 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-11-28 03:05:30,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:05:30,714 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-11-28 03:05:30,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 03:05:30,715 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:05:30,715 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:05:30,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:05:30,926 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:05:30,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:05:30,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1418688801, now seen corresponding path program 2 times [2020-11-28 03:05:30,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:05:30,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599510449] [2020-11-28 03:05:30,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:05:30,943 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:05:30,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1819485744] [2020-11-28 03:05:30,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8f9a026-6fcd-4c2a-90f2-d33d59d5e6e7/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 [2020-11-28 03:05:31,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:05:31,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:05:31,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-28 03:05:31,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:05:31,158 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 03:05:31,158 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:05:31,256 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:05:31,258 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-28 03:05:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:05:31,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599510449] [2020-11-28 03:05:31,298 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:05:31,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819485744] [2020-11-28 03:05:31,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:05:31,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-28 03:05:31,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46894428] [2020-11-28 03:05:31,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 03:05:31,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:05:31,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 03:05:31,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:05:31,300 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 12 states. [2020-11-28 03:05:31,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:05:31,676 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-11-28 03:05:31,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-28 03:05:31,677 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-11-28 03:05:31,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:05:31,678 INFO L225 Difference]: With dead ends: 40 [2020-11-28 03:05:31,678 INFO L226 Difference]: Without dead ends: 36 [2020-11-28 03:05:31,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-11-28 03:05:31,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-28 03:05:31,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2020-11-28 03:05:31,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-28 03:05:31,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-11-28 03:05:31,685 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-11-28 03:05:31,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:05:31,685 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-11-28 03:05:31,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 03:05:31,685 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-11-28 03:05:31,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-28 03:05:31,689 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:05:31,689 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:05:31,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-28 03:05:31,902 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:05:31,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:05:31,902 INFO L82 PathProgramCache]: Analyzing trace with hash -2046802029, now seen corresponding path program 2 times [2020-11-28 03:05:31,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:05:31,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533155463] [2020-11-28 03:05:31,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:05:31,915 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:05:31,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197057102] [2020-11-28 03:05:31,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8f9a026-6fcd-4c2a-90f2-d33d59d5e6e7/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 [2020-11-28 03:05:31,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:05:31,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:05:31,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 03:05:31,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:05:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:05:32,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533155463] [2020-11-28 03:05:32,121 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:05:32,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197057102] [2020-11-28 03:05:32,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:05:32,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-28 03:05:32,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616243500] [2020-11-28 03:05:32,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:05:32,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:05:32,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:05:32,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:05:32,123 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 5 states. [2020-11-28 03:05:32,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:05:32,255 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-11-28 03:05:32,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:05:32,255 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-11-28 03:05:32,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:05:32,256 INFO L225 Difference]: With dead ends: 42 [2020-11-28 03:05:32,256 INFO L226 Difference]: Without dead ends: 33 [2020-11-28 03:05:32,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:05:32,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-28 03:05:32,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-11-28 03:05:32,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-28 03:05:32,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-11-28 03:05:32,264 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2020-11-28 03:05:32,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:05:32,264 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-11-28 03:05:32,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:05:32,264 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-11-28 03:05:32,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-28 03:05:32,265 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:05:32,265 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:05:32,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:05:32,486 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:05:32,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:05:32,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1438818641, now seen corresponding path program 3 times [2020-11-28 03:05:32,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:05:32,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999252199] [2020-11-28 03:05:32,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:05:32,499 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:05:32,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1860093624] [2020-11-28 03:05:32,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8f9a026-6fcd-4c2a-90f2-d33d59d5e6e7/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:05:32,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-28 03:05:32,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:05:32,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-28 03:05:32,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:05:32,650 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-28 03:05:32,650 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:05:32,755 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 03:05:32,755 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:05:32,838 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:05:32,853 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-28 03:05:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-28 03:05:32,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999252199] [2020-11-28 03:05:32,965 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:05:32,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860093624] [2020-11-28 03:05:32,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:05:32,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-28 03:05:32,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92842877] [2020-11-28 03:05:32,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 03:05:32,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:05:32,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 03:05:32,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:05:32,968 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 10 states. [2020-11-28 03:05:33,478 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2020-11-28 03:05:33,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:05:33,532 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-11-28 03:05:33,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 03:05:33,533 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-11-28 03:05:33,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:05:33,534 INFO L225 Difference]: With dead ends: 33 [2020-11-28 03:05:33,534 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 03:05:33,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-11-28 03:05:33,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 03:05:33,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 03:05:33,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 03:05:33,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 03:05:33,535 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-11-28 03:05:33,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:05:33,535 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:05:33,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 03:05:33,536 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:05:33,536 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 03:05:33,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:05:33,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 03:05:34,116 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 36 [2020-11-28 03:05:34,305 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 39 [2020-11-28 03:05:34,309 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-11-28 03:05:34,309 INFO L277 CegarLoopResult]: At program point L52(lines 21 53) the Hoare annotation is: true [2020-11-28 03:05:34,309 INFO L274 CegarLoopResult]: For program point L15(lines 15 16) no Hoare annotation was computed. [2020-11-28 03:05:34,309 INFO L274 CegarLoopResult]: For program point L15-1(lines 15 16) no Hoare annotation was computed. [2020-11-28 03:05:34,309 INFO L274 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-11-28 03:05:34,309 INFO L274 CegarLoopResult]: For program point L11-2(line 11) no Hoare annotation was computed. [2020-11-28 03:05:34,309 INFO L274 CegarLoopResult]: For program point L40(lines 40 45) no Hoare annotation was computed. [2020-11-28 03:05:34,309 INFO L274 CegarLoopResult]: For program point L40-2(lines 40 45) no Hoare annotation was computed. [2020-11-28 03:05:34,309 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-28 03:05:34,310 INFO L270 CegarLoopResult]: At program point L32-2(lines 32 47) the Hoare annotation is: (let ((.cse0 (<= ULTIMATE.start_main_~X~0 2)) (.cse4 (<= ULTIMATE.start_main_~Y~0 2)) (.cse5 (<= 0 ULTIMATE.start_main_~X~0)) (.cse1 (= ULTIMATE.start_main_~y~0 0)) (.cse2 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse3 (<= 0 ULTIMATE.start_main_~Y~0))) (or (and .cse0 (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (< ULTIMATE.start_main_~v~0 (* 2 ULTIMATE.start_main_~Y~0)) .cse1 .cse2 (= (* ULTIMATE.start_main_~Y~0 4) (+ ULTIMATE.start_main_~v~0 ULTIMATE.start_main_~X~0)) .cse3) (and .cse0 .cse4 (<= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~X~0 1)) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse5 .cse2 .cse3) (and .cse0 .cse4 (= ULTIMATE.start_main_~x~0 0) .cse5 (= (+ (* (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~Y~0) 2) (* ULTIMATE.start_main_~Y~0 2)) (+ ULTIMATE.start_main_~v~0 (* (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~X~0) 2) ULTIMATE.start_main_~X~0)) .cse1 .cse2 .cse3))) [2020-11-28 03:05:34,310 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 03:05:34,310 INFO L274 CegarLoopResult]: For program point L32-3(lines 32 47) no Hoare annotation was computed. [2020-11-28 03:05:34,310 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-28 03:05:34,310 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-11-28 03:05:34,310 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 03:05:34,310 INFO L274 CegarLoopResult]: For program point L14(lines 14 17) no Hoare annotation was computed. [2020-11-28 03:05:34,310 INFO L270 CegarLoopResult]: At program point L14-1(lines 36 37) the Hoare annotation is: (let ((.cse0 (<= ULTIMATE.start_main_~X~0 2)) (.cse1 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse2 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse3 (<= 0 ULTIMATE.start_main_~Y~0))) (or (and .cse0 .cse1 (< ULTIMATE.start_main_~v~0 (* 2 ULTIMATE.start_main_~Y~0)) (= ULTIMATE.start_main_~y~0 0) .cse2 (= (* ULTIMATE.start_main_~Y~0 4) (+ ULTIMATE.start_main_~v~0 ULTIMATE.start_main_~X~0)) .cse3) (and .cse0 (<= ULTIMATE.start_main_~Y~0 2) .cse1 (<= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~X~0 1)) (<= 0 ULTIMATE.start_main_~X~0) (= (+ (* (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~Y~0) 2) (* ULTIMATE.start_main_~Y~0 2)) (+ ULTIMATE.start_main_~v~0 (* (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~X~0) 2) ULTIMATE.start_main_~X~0)) .cse2 .cse3))) [2020-11-28 03:05:34,310 INFO L274 CegarLoopResult]: For program point L14-2(lines 14 17) no Hoare annotation was computed. [2020-11-28 03:05:34,310 INFO L277 CegarLoopResult]: At program point L14-3(lines 13 19) the Hoare annotation is: true [2020-11-28 03:05:34,310 INFO L274 CegarLoopResult]: For program point L10(lines 10 12) no Hoare annotation was computed. [2020-11-28 03:05:34,311 INFO L274 CegarLoopResult]: For program point L10-1(lines 10 12) no Hoare annotation was computed. [2020-11-28 03:05:34,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:05:34 BoogieIcfgContainer [2020-11-28 03:05:34,327 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:05:34,327 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:05:34,327 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:05:34,328 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:05:34,328 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:05:26" (3/4) ... [2020-11-28 03:05:34,331 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 03:05:34,340 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-11-28 03:05:34,341 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-28 03:05:34,341 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:05:34,341 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:05:34,384 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c8f9a026-6fcd-4c2a-90f2-d33d59d5e6e7/bin/uautomizer/witness.graphml [2020-11-28 03:05:34,384 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:05:34,385 INFO L168 Benchmark]: Toolchain (without parser) took 8223.38 ms. Allocated memory was 90.2 MB in the beginning and 146.8 MB in the end (delta: 56.6 MB). Free memory was 59.6 MB in the beginning and 65.3 MB in the end (delta: -5.7 MB). Peak memory consumption was 50.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:05:34,386 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 90.2 MB. Free memory was 49.9 MB in the beginning and 49.9 MB in the end (delta: 35.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:05:34,387 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.72 ms. Allocated memory is still 90.2 MB. Free memory was 59.3 MB in the beginning and 68.0 MB in the end (delta: -8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:05:34,387 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.30 ms. Allocated memory is still 90.2 MB. Free memory was 67.6 MB in the beginning and 66.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:05:34,388 INFO L168 Benchmark]: Boogie Preprocessor took 21.01 ms. Allocated memory is still 90.2 MB. Free memory was 66.3 MB in the beginning and 65.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:05:34,388 INFO L168 Benchmark]: RCFGBuilder took 372.66 ms. Allocated memory is still 90.2 MB. Free memory was 65.1 MB in the beginning and 52.0 MB in the end (delta: 13.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 03:05:34,389 INFO L168 Benchmark]: TraceAbstraction took 7442.36 ms. Allocated memory was 90.2 MB in the beginning and 146.8 MB in the end (delta: 56.6 MB). Free memory was 51.6 MB in the beginning and 68.4 MB in the end (delta: -16.8 MB). Peak memory consumption was 40.6 MB. Max. memory is 16.1 GB. [2020-11-28 03:05:34,389 INFO L168 Benchmark]: Witness Printer took 57.17 ms. Allocated memory is still 146.8 MB. Free memory was 68.4 MB in the beginning and 65.3 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 03:05:34,392 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 90.2 MB. Free memory was 49.9 MB in the beginning and 49.9 MB in the end (delta: 35.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 292.72 ms. Allocated memory is still 90.2 MB. Free memory was 59.3 MB in the beginning and 68.0 MB in the end (delta: -8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.30 ms. Allocated memory is still 90.2 MB. Free memory was 67.6 MB in the beginning and 66.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.01 ms. Allocated memory is still 90.2 MB. Free memory was 66.3 MB in the beginning and 65.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 372.66 ms. Allocated memory is still 90.2 MB. Free memory was 65.1 MB in the beginning and 52.0 MB in the end (delta: 13.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7442.36 ms. Allocated memory was 90.2 MB in the beginning and 146.8 MB in the end (delta: 56.6 MB). Free memory was 51.6 MB in the beginning and 68.4 MB in the end (delta: -16.8 MB). Peak memory consumption was 40.6 MB. Max. memory is 16.1 GB. * Witness Printer took 57.17 ms. Allocated memory is still 146.8 MB. Free memory was 68.4 MB in the beginning and 65.3 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((((((X <= 2 && 1 == cond) && v < 2 * Y) && y == 0) && cond == 1) && Y * 4 == v + X) && 0 <= Y) || (((((((X <= 2 && Y <= 2) && 1 == cond) && x <= X + 1) && 0 <= X) && x * Y * 2 + Y * 2 == v + y * X * 2 + X) && cond == 1) && 0 <= Y) - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: (((((((X <= 2 && 1 == cond) && v < 2 * Y) && y == 0) && cond == 1) && Y * 4 == v + X) && 0 <= Y) || ((((((X <= 2 && Y <= 2) && x <= X + 1) && 1 <= cond) && 0 <= X) && cond == 1) && 0 <= Y)) || (((((((X <= 2 && Y <= 2) && x == 0) && 0 <= X) && x * Y * 2 + Y * 2 == v + y * X * 2 + X) && y == 0) && cond == 1) && 0 <= Y) - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.7s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 90 SDtfs, 142 SDslu, 213 SDs, 0 SdLazy, 512 SolverSat, 81 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 160 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=7, 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, 16 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 18 NumberOfFragments, 166 HoareAnnotationTreeSize, 4 FomulaSimplifications, 634 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 4 FomulaSimplificationsInter, 530 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 147 NumberOfCodeBlocks, 137 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 139 ConstructedInterpolants, 5 QuantifiedInterpolants, 28421 SizeOfPredicates, 75 NumberOfNonLiveVariables, 674 ConjunctsInSsa, 153 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 35/75 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...