./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound20.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_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound20.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/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 b14d668b284f90af25e6424be49573cda3740c43 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 23:39:34,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 23:39:34,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 23:39:34,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 23:39:34,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 23:39:34,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 23:39:34,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 23:39:34,869 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 23:39:34,871 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 23:39:34,873 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 23:39:34,874 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 23:39:34,876 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 23:39:34,877 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 23:39:34,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 23:39:34,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 23:39:34,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 23:39:34,883 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 23:39:34,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 23:39:34,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 23:39:34,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 23:39:34,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 23:39:34,895 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 23:39:34,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 23:39:34,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 23:39:34,901 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 23:39:34,902 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 23:39:34,902 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 23:39:34,904 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 23:39:34,905 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 23:39:34,906 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 23:39:34,907 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 23:39:34,908 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 23:39:34,909 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 23:39:34,910 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 23:39:34,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 23:39:34,912 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 23:39:34,913 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 23:39:34,913 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 23:39:34,914 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 23:39:34,915 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 23:39:34,916 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 23:39:34,917 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 23:39:34,944 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 23:39:34,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 23:39:34,945 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 23:39:34,946 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 23:39:34,946 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 23:39:34,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 23:39:34,946 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 23:39:34,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 23:39:34,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 23:39:34,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 23:39:34,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 23:39:34,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 23:39:34,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 23:39:34,948 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 23:39:34,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 23:39:34,948 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 23:39:34,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 23:39:34,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 23:39:34,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 23:39:34,949 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 23:39:34,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 23:39:34,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:39:34,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 23:39:34,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 23:39:34,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 23:39:34,951 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 23:39:34,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 23:39:34,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 23:39:34,951 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 23:39:34,951 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_2f7a10c7-ef77-42fb-879c-6b07136f2135/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b14d668b284f90af25e6424be49573cda3740c43 [2020-11-29 23:39:35,250 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 23:39:35,295 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 23:39:35,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 23:39:35,301 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 23:39:35,303 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 23:39:35,304 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound20.c [2020-11-29 23:39:35,414 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/data/0d1ec69ab/916183e711704211b522dae5e238f3ec/FLAG44eaec78c [2020-11-29 23:39:35,904 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 23:39:35,904 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound20.c [2020-11-29 23:39:35,915 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/data/0d1ec69ab/916183e711704211b522dae5e238f3ec/FLAG44eaec78c [2020-11-29 23:39:36,293 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/data/0d1ec69ab/916183e711704211b522dae5e238f3ec [2020-11-29 23:39:36,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 23:39:36,299 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 23:39:36,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 23:39:36,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 23:39:36,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 23:39:36,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:39:36" (1/1) ... [2020-11-29 23:39:36,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c16050b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:39:36, skipping insertion in model container [2020-11-29 23:39:36,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:39:36" (1/1) ... [2020-11-29 23:39:36,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 23:39:36,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 23:39:36,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:39:36,546 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 23:39:36,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:39:36,582 INFO L208 MainTranslator]: Completed translation [2020-11-29 23:39:36,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:39:36 WrapperNode [2020-11-29 23:39:36,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 23:39:36,585 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 23:39:36,585 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 23:39:36,585 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 23:39:36,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:39:36" (1/1) ... [2020-11-29 23:39:36,601 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:39:36" (1/1) ... [2020-11-29 23:39:36,625 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 23:39:36,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 23:39:36,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 23:39:36,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 23:39:36,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:39:36" (1/1) ... [2020-11-29 23:39:36,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:39:36" (1/1) ... [2020-11-29 23:39:36,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:39:36" (1/1) ... [2020-11-29 23:39:36,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:39:36" (1/1) ... [2020-11-29 23:39:36,643 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:39:36" (1/1) ... [2020-11-29 23:39:36,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:39:36" (1/1) ... [2020-11-29 23:39:36,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:39:36" (1/1) ... [2020-11-29 23:39:36,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 23:39:36,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 23:39:36,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 23:39:36,654 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 23:39:36,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:39:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:39:36,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 23:39:36,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 23:39:36,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 23:39:36,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 23:39:37,015 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 23:39:37,016 INFO L298 CfgBuilder]: Removed 17 assume(true) statements. [2020-11-29 23:39:37,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:39:37 BoogieIcfgContainer [2020-11-29 23:39:37,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 23:39:37,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 23:39:37,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 23:39:37,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 23:39:37,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 11:39:36" (1/3) ... [2020-11-29 23:39:37,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5629ba7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:39:37, skipping insertion in model container [2020-11-29 23:39:37,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:39:36" (2/3) ... [2020-11-29 23:39:37,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5629ba7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:39:37, skipping insertion in model container [2020-11-29 23:39:37,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:39:37" (3/3) ... [2020-11-29 23:39:37,049 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound20.c [2020-11-29 23:39:37,061 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 23:39:37,073 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-29 23:39:37,088 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-29 23:39:37,118 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 23:39:37,119 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 23:39:37,119 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 23:39:37,119 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 23:39:37,119 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 23:39:37,119 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 23:39:37,120 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 23:39:37,120 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 23:39:37,136 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-11-29 23:39:37,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 23:39:37,143 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:39:37,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:39:37,144 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:39:37,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:39:37,151 INFO L82 PathProgramCache]: Analyzing trace with hash -594062832, now seen corresponding path program 1 times [2020-11-29 23:39:37,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:39:37,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792551445] [2020-11-29 23:39:37,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:39:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:39:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:39:37,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792551445] [2020-11-29 23:39:37,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:39:37,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 23:39:37,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409931506] [2020-11-29 23:39:37,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 23:39:37,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:39:37,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 23:39:37,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 23:39:37,359 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-11-29 23:39:37,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:39:37,378 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2020-11-29 23:39:37,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 23:39:37,380 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-11-29 23:39:37,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:39:37,390 INFO L225 Difference]: With dead ends: 39 [2020-11-29 23:39:37,390 INFO L226 Difference]: Without dead ends: 17 [2020-11-29 23:39:37,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 23:39:37,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-29 23:39:37,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-29 23:39:37,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-29 23:39:37,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-11-29 23:39:37,433 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2020-11-29 23:39:37,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:39:37,434 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-11-29 23:39:37,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 23:39:37,434 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-11-29 23:39:37,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 23:39:37,435 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:39:37,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:39:37,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 23:39:37,436 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:39:37,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:39:37,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1182791572, now seen corresponding path program 1 times [2020-11-29 23:39:37,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:39:37,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391966799] [2020-11-29 23:39:37,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:39:37,466 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:39:37,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929514763] [2020-11-29 23:39:37,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:39:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:39:37,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 23:39:37,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:39:37,680 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 23:39:37,681 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:39:37,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:39:37,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391966799] [2020-11-29 23:39:37,795 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:39:37,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929514763] [2020-11-29 23:39:37,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:39:37,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 23:39:37,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336880036] [2020-11-29 23:39:37,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 23:39:37,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:39:37,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 23:39:37,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:39:37,800 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 6 states. [2020-11-29 23:39:38,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:39:38,044 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-11-29 23:39:38,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 23:39:38,046 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-11-29 23:39:38,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:39:38,047 INFO L225 Difference]: With dead ends: 29 [2020-11-29 23:39:38,047 INFO L226 Difference]: Without dead ends: 23 [2020-11-29 23:39:38,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:39:38,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-29 23:39:38,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-11-29 23:39:38,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-29 23:39:38,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-11-29 23:39:38,061 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 9 [2020-11-29 23:39:38,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:39:38,061 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-11-29 23:39:38,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 23:39:38,062 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-11-29 23:39:38,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 23:39:38,063 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:39:38,064 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:39:38,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-29 23:39:38,290 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:39:38,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:39:38,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1122200418, now seen corresponding path program 1 times [2020-11-29 23:39:38,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:39:38,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389349427] [2020-11-29 23:39:38,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:39:38,316 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:39:38,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [540219202] [2020-11-29 23:39:38,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:39:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:39:38,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-29 23:39:38,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:39:38,410 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 23:39:38,411 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:39:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:39:38,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389349427] [2020-11-29 23:39:38,637 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:39:38,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540219202] [2020-11-29 23:39:38,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:39:38,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-29 23:39:38,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47825022] [2020-11-29 23:39:38,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 23:39:38,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:39:38,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 23:39:38,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-29 23:39:38,642 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-11-29 23:39:39,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:39:39,259 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-11-29 23:39:39,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 23:39:39,262 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-11-29 23:39:39,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:39:39,263 INFO L225 Difference]: With dead ends: 34 [2020-11-29 23:39:39,263 INFO L226 Difference]: Without dead ends: 28 [2020-11-29 23:39:39,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-11-29 23:39:39,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-29 23:39:39,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-11-29 23:39:39,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-29 23:39:39,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-11-29 23:39:39,280 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2020-11-29 23:39:39,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:39:39,281 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-11-29 23:39:39,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 23:39:39,282 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-11-29 23:39:39,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 23:39:39,284 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:39:39,284 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:39:39,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:39:39,511 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:39:39,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:39:39,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1120353376, now seen corresponding path program 1 times [2020-11-29 23:39:39,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:39:39,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380086490] [2020-11-29 23:39:39,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:39:39,534 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:39:39,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930727451] [2020-11-29 23:39:39,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:39:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:39:39,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 23:39:39,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:39:39,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:39:39,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380086490] [2020-11-29 23:39:39,779 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:39:39,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930727451] [2020-11-29 23:39:39,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:39:39,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-29 23:39:39,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55313763] [2020-11-29 23:39:39,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 23:39:39,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:39:39,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 23:39:39,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:39:39,782 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2020-11-29 23:39:40,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:39:40,017 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-11-29 23:39:40,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 23:39:40,018 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-11-29 23:39:40,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:39:40,020 INFO L225 Difference]: With dead ends: 38 [2020-11-29 23:39:40,020 INFO L226 Difference]: Without dead ends: 36 [2020-11-29 23:39:40,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-11-29 23:39:40,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-29 23:39:40,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2020-11-29 23:39:40,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 23:39:40,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-11-29 23:39:40,029 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2020-11-29 23:39:40,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:39:40,030 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-11-29 23:39:40,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 23:39:40,030 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-11-29 23:39:40,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 23:39:40,031 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:39:40,032 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:39:40,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:39:40,251 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:39:40,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:39:40,252 INFO L82 PathProgramCache]: Analyzing trace with hash -250706221, now seen corresponding path program 1 times [2020-11-29 23:39:40,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:39:40,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138353377] [2020-11-29 23:39:40,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:39:40,272 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:39:40,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633425780] [2020-11-29 23:39:40,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:39:40,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:39:40,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-29 23:39:40,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:39:40,616 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:39:40,628 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 23:39:40,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:39:40,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138353377] [2020-11-29 23:39:40,656 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:39:40,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633425780] [2020-11-29 23:39:40,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:39:40,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-29 23:39:40,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171611104] [2020-11-29 23:39:40,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 23:39:40,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:39:40,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 23:39:40,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:39:40,659 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-11-29 23:39:40,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:39:40,942 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-11-29 23:39:40,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 23:39:40,943 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-11-29 23:39:40,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:39:40,944 INFO L225 Difference]: With dead ends: 36 [2020-11-29 23:39:40,944 INFO L226 Difference]: Without dead ends: 32 [2020-11-29 23:39:40,945 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 [2020-11-29 23:39:40,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-29 23:39:40,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2020-11-29 23:39:40,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-29 23:39:40,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-11-29 23:39:40,951 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2020-11-29 23:39:40,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:39:40,951 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-11-29 23:39:40,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 23:39:40,952 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-11-29 23:39:40,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 23:39:40,952 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:39:40,953 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:39:41,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:39:41,179 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:39:41,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:39:41,180 INFO L82 PathProgramCache]: Analyzing trace with hash 32148948, now seen corresponding path program 2 times [2020-11-29 23:39:41,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:39:41,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598587981] [2020-11-29 23:39:41,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:39:41,197 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:39:41,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342816128] [2020-11-29 23:39:41,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:39:41,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 23:39:41,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:39:41,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-29 23:39:41,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:39:41,291 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 23:39:41,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:39:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:39:41,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598587981] [2020-11-29 23:39:41,506 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:39:41,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342816128] [2020-11-29 23:39:41,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:39:41,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-29 23:39:41,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125752402] [2020-11-29 23:39:41,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 23:39:41,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:39:41,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 23:39:41,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-29 23:39:41,509 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2020-11-29 23:39:42,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:39:42,174 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-11-29 23:39:42,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 23:39:42,174 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-11-29 23:39:42,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:39:42,175 INFO L225 Difference]: With dead ends: 43 [2020-11-29 23:39:42,175 INFO L226 Difference]: Without dead ends: 37 [2020-11-29 23:39:42,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-11-29 23:39:42,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-29 23:39:42,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-11-29 23:39:42,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-29 23:39:42,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-11-29 23:39:42,184 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 19 [2020-11-29 23:39:42,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:39:42,184 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-11-29 23:39:42,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 23:39:42,185 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-11-29 23:39:42,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 23:39:42,185 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:39:42,186 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:39:42,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-29 23:39:42,402 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:39:42,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:39:42,403 INFO L82 PathProgramCache]: Analyzing trace with hash 33995990, now seen corresponding path program 1 times [2020-11-29 23:39:42,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:39:42,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222204469] [2020-11-29 23:39:42,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:39:42,416 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:39:42,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [357252781] [2020-11-29 23:39:42,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/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 [2020-11-29 23:39:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:39:42,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-29 23:39:42,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:39:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:39:42,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222204469] [2020-11-29 23:39:42,636 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:39:42,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357252781] [2020-11-29 23:39:42,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:39:42,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-29 23:39:42,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259347206] [2020-11-29 23:39:42,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 23:39:42,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:39:42,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 23:39:42,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-29 23:39:42,638 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2020-11-29 23:39:42,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:39:42,887 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-11-29 23:39:42,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 23:39:42,888 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-11-29 23:39:42,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:39:42,889 INFO L225 Difference]: With dead ends: 48 [2020-11-29 23:39:42,891 INFO L226 Difference]: Without dead ends: 37 [2020-11-29 23:39:42,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-11-29 23:39:42,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-29 23:39:42,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-11-29 23:39:42,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-29 23:39:42,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-11-29 23:39:42,900 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 19 [2020-11-29 23:39:42,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:39:42,901 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-11-29 23:39:42,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 23:39:42,901 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-11-29 23:39:42,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 23:39:42,902 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:39:42,902 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:39:43,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:39:43,104 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:39:43,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:39:43,104 INFO L82 PathProgramCache]: Analyzing trace with hash -360878062, now seen corresponding path program 2 times [2020-11-29 23:39:43,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:39:43,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231989220] [2020-11-29 23:39:43,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:39:43,119 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:39:43,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054140695] [2020-11-29 23:39:43,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/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 [2020-11-29 23:39:43,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 23:39:43,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:39:43,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-29 23:39:43,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:39:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:39:43,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231989220] [2020-11-29 23:39:43,377 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:39:43,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054140695] [2020-11-29 23:39:43,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:39:43,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-29 23:39:43,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371720554] [2020-11-29 23:39:43,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 23:39:43,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:39:43,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 23:39:43,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:39:43,380 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 9 states. [2020-11-29 23:39:43,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:39:43,670 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-11-29 23:39:43,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 23:39:43,670 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-11-29 23:39:43,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:39:43,671 INFO L225 Difference]: With dead ends: 53 [2020-11-29 23:39:43,671 INFO L226 Difference]: Without dead ends: 51 [2020-11-29 23:39:43,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-11-29 23:39:43,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-29 23:39:43,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-11-29 23:39:43,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-29 23:39:43,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-11-29 23:39:43,684 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 19 [2020-11-29 23:39:43,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:39:43,684 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-11-29 23:39:43,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 23:39:43,684 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-11-29 23:39:43,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 23:39:43,685 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:39:43,686 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:39:43,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:39:43,896 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:39:43,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:39:43,896 INFO L82 PathProgramCache]: Analyzing trace with hash -359031020, now seen corresponding path program 2 times [2020-11-29 23:39:43,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:39:43,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028752313] [2020-11-29 23:39:43,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:39:43,916 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:39:43,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [261339382] [2020-11-29 23:39:43,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:39:43,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 23:39:43,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:39:43,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-29 23:39:43,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:39:44,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:39:44,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028752313] [2020-11-29 23:39:44,123 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:39:44,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261339382] [2020-11-29 23:39:44,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:39:44,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-29 23:39:44,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314688686] [2020-11-29 23:39:44,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 23:39:44,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:39:44,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 23:39:44,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:39:44,127 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 9 states. [2020-11-29 23:39:44,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:39:44,524 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2020-11-29 23:39:44,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 23:39:44,525 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-11-29 23:39:44,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:39:44,527 INFO L225 Difference]: With dead ends: 56 [2020-11-29 23:39:44,527 INFO L226 Difference]: Without dead ends: 54 [2020-11-29 23:39:44,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-11-29 23:39:44,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-29 23:39:44,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-11-29 23:39:44,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-29 23:39:44,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-11-29 23:39:44,545 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 19 [2020-11-29 23:39:44,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:39:44,547 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-11-29 23:39:44,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 23:39:44,548 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-11-29 23:39:44,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 23:39:44,551 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:39:44,551 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:39:44,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-29 23:39:44,767 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:39:44,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:39:44,768 INFO L82 PathProgramCache]: Analyzing trace with hash -609342175, now seen corresponding path program 1 times [2020-11-29 23:39:44,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:39:44,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589815379] [2020-11-29 23:39:44,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:39:44,787 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:39:44,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779932889] [2020-11-29 23:39:44,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:39:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:39:44,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 23:39:44,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:39:45,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:39:45,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589815379] [2020-11-29 23:39:45,042 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:39:45,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779932889] [2020-11-29 23:39:45,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:39:45,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-29 23:39:45,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752391267] [2020-11-29 23:39:45,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 23:39:45,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:39:45,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 23:39:45,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:39:45,044 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 7 states. [2020-11-29 23:39:45,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:39:45,237 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-11-29 23:39:45,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 23:39:45,238 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-11-29 23:39:45,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:39:45,239 INFO L225 Difference]: With dead ends: 53 [2020-11-29 23:39:45,239 INFO L226 Difference]: Without dead ends: 49 [2020-11-29 23:39:45,240 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 [2020-11-29 23:39:45,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-29 23:39:45,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-11-29 23:39:45,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-29 23:39:45,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-11-29 23:39:45,254 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 22 [2020-11-29 23:39:45,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:39:45,255 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-11-29 23:39:45,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 23:39:45,255 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-11-29 23:39:45,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 23:39:45,260 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:39:45,260 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:39:45,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:39:45,485 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:39:45,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:39:45,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1418688801, now seen corresponding path program 2 times [2020-11-29 23:39:45,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:39:45,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856912317] [2020-11-29 23:39:45,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:39:45,498 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:39:45,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582735882] [2020-11-29 23:39:45,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:39:45,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 23:39:45,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:39:45,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-29 23:39:45,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:39:45,797 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:39:45,797 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:39:45,888 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:39:45,890 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 23:39:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:39:45,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856912317] [2020-11-29 23:39:45,927 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:39:45,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582735882] [2020-11-29 23:39:45,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:39:45,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-29 23:39:45,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538034743] [2020-11-29 23:39:45,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 23:39:45,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:39:45,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 23:39:45,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-11-29 23:39:45,929 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 12 states. [2020-11-29 23:39:46,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:39:46,310 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-11-29 23:39:46,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 23:39:46,311 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-11-29 23:39:46,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:39:46,312 INFO L225 Difference]: With dead ends: 53 [2020-11-29 23:39:46,312 INFO L226 Difference]: Without dead ends: 49 [2020-11-29 23:39:46,312 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 [2020-11-29 23:39:46,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-29 23:39:46,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2020-11-29 23:39:46,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-29 23:39:46,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-11-29 23:39:46,319 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 22 [2020-11-29 23:39:46,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:39:46,320 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-11-29 23:39:46,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 23:39:46,320 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-11-29 23:39:46,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 23:39:46,320 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:39:46,321 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:39:46,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:39:46,522 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:39:46,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:39:46,522 INFO L82 PathProgramCache]: Analyzing trace with hash -132782498, now seen corresponding path program 3 times [2020-11-29 23:39:46,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:39:46,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762192157] [2020-11-29 23:39:46,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:39:46,536 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:39:46,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983128384] [2020-11-29 23:39:46,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:39:47,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-29 23:39:47,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:39:47,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 46 conjunts are in the unsatisfiable core [2020-11-29 23:39:47,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:39:47,095 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 23:39:47,096 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:39:47,129 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 23:39:47,129 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:39:47,263 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:39:47,264 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:39:47,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:39:47,472 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 23:39:47,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762192157] [2020-11-29 23:39:47,473 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:39:47,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983128384] [2020-11-29 23:39:47,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:39:47,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-29 23:39:47,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520600526] [2020-11-29 23:39:47,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 23:39:47,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:39:47,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 23:39:47,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-11-29 23:39:47,474 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 13 states. [2020-11-29 23:39:48,108 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2020-11-29 23:39:48,298 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2020-11-29 23:39:49,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:39:49,286 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-11-29 23:39:49,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 23:39:49,286 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-11-29 23:39:49,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:39:49,287 INFO L225 Difference]: With dead ends: 57 [2020-11-29 23:39:49,287 INFO L226 Difference]: Without dead ends: 51 [2020-11-29 23:39:49,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-11-29 23:39:49,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-29 23:39:49,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-11-29 23:39:49,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-29 23:39:49,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-11-29 23:39:49,299 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 24 [2020-11-29 23:39:49,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:39:49,300 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-11-29 23:39:49,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 23:39:49,300 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-11-29 23:39:49,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 23:39:49,301 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:39:49,301 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:39:49,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-29 23:39:49,527 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:39:49,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:39:49,528 INFO L82 PathProgramCache]: Analyzing trace with hash -130935456, now seen corresponding path program 3 times [2020-11-29 23:39:49,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:39:49,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205573020] [2020-11-29 23:39:49,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:39:49,538 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:39:49,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424218897] [2020-11-29 23:39:49,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:39:49,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-29 23:39:49,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:39:49,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-29 23:39:49,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:39:49,649 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 23:39:49,649 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:39:49,746 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:39:49,747 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:39:49,899 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:39:49,902 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 23:39:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 23:39:49,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205573020] [2020-11-29 23:39:49,983 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:39:49,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424218897] [2020-11-29 23:39:49,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:39:49,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-11-29 23:39:49,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552532675] [2020-11-29 23:39:49,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 23:39:49,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:39:49,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 23:39:49,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-11-29 23:39:49,988 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 11 states. [2020-11-29 23:39:50,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:39:50,553 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-11-29 23:39:50,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 23:39:50,554 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-11-29 23:39:50,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:39:50,555 INFO L225 Difference]: With dead ends: 58 [2020-11-29 23:39:50,555 INFO L226 Difference]: Without dead ends: 52 [2020-11-29 23:39:50,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-11-29 23:39:50,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-29 23:39:50,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2020-11-29 23:39:50,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-29 23:39:50,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-11-29 23:39:50,567 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 24 [2020-11-29 23:39:50,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:39:50,568 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-11-29 23:39:50,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 23:39:50,568 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-11-29 23:39:50,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 23:39:50,569 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:39:50,569 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:39:50,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-29 23:39:50,780 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:39:50,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:39:50,781 INFO L82 PathProgramCache]: Analyzing trace with hash -525809508, now seen corresponding path program 4 times [2020-11-29 23:39:50,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:39:50,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791249776] [2020-11-29 23:39:50,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:39:50,790 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:39:50,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380521470] [2020-11-29 23:39:50,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:39:50,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 23:39:50,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:39:50,843 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 56 conjunts are in the unsatisfiable core [2020-11-29 23:39:50,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:39:51,241 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:39:51,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791249776] [2020-11-29 23:39:51,242 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:39:51,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380521470] [2020-11-29 23:39:51,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:39:51,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-29 23:39:51,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487267137] [2020-11-29 23:39:51,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 23:39:51,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:39:51,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 23:39:51,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-11-29 23:39:51,245 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 13 states. [2020-11-29 23:39:51,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:39:51,751 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-11-29 23:39:51,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 23:39:51,752 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-11-29 23:39:51,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:39:51,753 INFO L225 Difference]: With dead ends: 60 [2020-11-29 23:39:51,753 INFO L226 Difference]: Without dead ends: 54 [2020-11-29 23:39:51,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-11-29 23:39:51,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-29 23:39:51,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2020-11-29 23:39:51,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-29 23:39:51,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-11-29 23:39:51,771 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 24 [2020-11-29 23:39:51,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:39:51,771 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-11-29 23:39:51,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 23:39:51,772 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-11-29 23:39:51,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 23:39:51,776 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:39:51,776 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:39:51,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-29 23:39:51,999 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:39:52,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:39:52,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1412646176, now seen corresponding path program 5 times [2020-11-29 23:39:52,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:39:52,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565633384] [2020-11-29 23:39:52,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:39:52,014 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:39:52,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868304748] [2020-11-29 23:39:52,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:39:52,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-29 23:39:52,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:39:52,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 23:39:52,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:39:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:39:52,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565633384] [2020-11-29 23:39:52,243 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:39:52,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868304748] [2020-11-29 23:39:52,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:39:52,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-29 23:39:52,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634824098] [2020-11-29 23:39:52,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:39:52,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:39:52,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:39:52,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:39:52,245 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 5 states. [2020-11-29 23:39:52,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:39:52,475 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-11-29 23:39:52,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 23:39:52,477 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-11-29 23:39:52,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:39:52,477 INFO L225 Difference]: With dead ends: 61 [2020-11-29 23:39:52,477 INFO L226 Difference]: Without dead ends: 50 [2020-11-29 23:39:52,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:39:52,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-29 23:39:52,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-11-29 23:39:52,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-29 23:39:52,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2020-11-29 23:39:52,496 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 24 [2020-11-29 23:39:52,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:39:52,497 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2020-11-29 23:39:52,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:39:52,497 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2020-11-29 23:39:52,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 23:39:52,498 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:39:52,498 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:39:52,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:39:52,723 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:39:52,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:39:52,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1410799134, now seen corresponding path program 6 times [2020-11-29 23:39:52,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:39:52,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061662915] [2020-11-29 23:39:52,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:39:52,734 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:39:52,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813405922] [2020-11-29 23:39:52,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:39:52,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-29 23:39:52,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:39:52,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-29 23:39:52,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:39:53,091 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:39:53,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061662915] [2020-11-29 23:39:53,092 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:39:53,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813405922] [2020-11-29 23:39:53,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:39:53,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-11-29 23:39:53,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844266362] [2020-11-29 23:39:53,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 23:39:53,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:39:53,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 23:39:53,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-11-29 23:39:53,093 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 11 states. [2020-11-29 23:39:53,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:39:53,509 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2020-11-29 23:39:53,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 23:39:53,510 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-11-29 23:39:53,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:39:53,511 INFO L225 Difference]: With dead ends: 65 [2020-11-29 23:39:53,511 INFO L226 Difference]: Without dead ends: 63 [2020-11-29 23:39:53,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2020-11-29 23:39:53,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-29 23:39:53,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2020-11-29 23:39:53,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-29 23:39:53,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-11-29 23:39:53,524 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 24 [2020-11-29 23:39:53,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:39:53,525 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-11-29 23:39:53,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 23:39:53,525 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-11-29 23:39:53,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 23:39:53,526 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:39:53,526 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:39:53,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-29 23:39:53,739 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:39:53,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:39:53,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1805673186, now seen corresponding path program 7 times [2020-11-29 23:39:53,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:39:53,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637650783] [2020-11-29 23:39:53,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:39:53,747 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:39:53,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687312556] [2020-11-29 23:39:53,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:39:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:39:53,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-29 23:39:53,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:39:54,037 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:39:54,037 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:39:54,312 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:39:54,316 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:39:54,432 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:39:54,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637650783] [2020-11-29 23:39:54,433 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:39:54,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687312556] [2020-11-29 23:39:54,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:39:54,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-29 23:39:54,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205353829] [2020-11-29 23:39:54,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 23:39:54,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:39:54,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 23:39:54,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-11-29 23:39:54,436 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 13 states. [2020-11-29 23:39:54,974 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-11-29 23:39:55,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:39:55,376 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2020-11-29 23:39:55,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 23:39:55,377 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-11-29 23:39:55,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:39:55,378 INFO L225 Difference]: With dead ends: 80 [2020-11-29 23:39:55,378 INFO L226 Difference]: Without dead ends: 69 [2020-11-29 23:39:55,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-11-29 23:39:55,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-29 23:39:55,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2020-11-29 23:39:55,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-29 23:39:55,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2020-11-29 23:39:55,394 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 24 [2020-11-29 23:39:55,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:39:55,394 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2020-11-29 23:39:55,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 23:39:55,395 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2020-11-29 23:39:55,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 23:39:55,396 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:39:55,396 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:39:55,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 23:39:55,623 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:39:55,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:39:55,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1803826144, now seen corresponding path program 3 times [2020-11-29 23:39:55,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:39:55,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427947154] [2020-11-29 23:39:55,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:39:55,633 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:39:55,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771639957] [2020-11-29 23:39:55,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:43:04,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-29 23:43:04,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:43:09,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 43 conjunts are in the unsatisfiable core [2020-11-29 23:43:09,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:43:09,978 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 23:43:09,978 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:43:10,014 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 23:43:10,014 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:43:10,163 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:43:10,164 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:43:10,489 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-11-29 23:43:10,594 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:43:10,598 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 23:43:10,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 23:43:10,609 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 23:43:10,614 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 23:43:10,620 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 23:43:10,625 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 23:43:10,630 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 23:43:10,635 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 23:43:10,827 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2020-11-29 23:43:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 23:43:10,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427947154] [2020-11-29 23:43:10,847 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:43:10,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771639957] [2020-11-29 23:43:10,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:43:10,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-29 23:43:10,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193065059] [2020-11-29 23:43:10,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 23:43:10,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:43:10,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 23:43:10,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-11-29 23:43:10,849 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 13 states. [2020-11-29 23:43:11,137 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2020-11-29 23:43:11,455 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2020-11-29 23:43:11,789 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2020-11-29 23:43:12,965 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2020-11-29 23:43:13,436 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2020-11-29 23:43:13,823 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 35 [2020-11-29 23:43:15,135 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2020-11-29 23:43:15,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:43:15,138 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2020-11-29 23:43:15,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 23:43:15,139 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-11-29 23:43:15,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:43:15,141 INFO L225 Difference]: With dead ends: 63 [2020-11-29 23:43:15,141 INFO L226 Difference]: Without dead ends: 61 [2020-11-29 23:43:15,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-11-29 23:43:15,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-29 23:43:15,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-11-29 23:43:15,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-29 23:43:15,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2020-11-29 23:43:15,156 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 24 [2020-11-29 23:43:15,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:43:15,156 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2020-11-29 23:43:15,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 23:43:15,156 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2020-11-29 23:43:15,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 23:43:15,157 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:43:15,157 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:43:15,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-29 23:43:15,367 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:43:15,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:43:15,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1438818641, now seen corresponding path program 2 times [2020-11-29 23:43:15,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:43:15,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312629801] [2020-11-29 23:43:15,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:43:15,381 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:43:15,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591572245] [2020-11-29 23:43:15,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:43:15,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 23:43:15,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:43:15,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-29 23:43:15,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:43:16,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 23:43:16,057 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:43:16,059 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:43:16,060 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:43:16,154 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:43:16,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312629801] [2020-11-29 23:43:16,154 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:43:16,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591572245] [2020-11-29 23:43:16,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:43:16,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-11-29 23:43:16,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298264173] [2020-11-29 23:43:16,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 23:43:16,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:43:16,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 23:43:16,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-11-29 23:43:16,156 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 11 states. [2020-11-29 23:43:16,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:43:16,712 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-11-29 23:43:16,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 23:43:16,713 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-11-29 23:43:16,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:43:16,714 INFO L225 Difference]: With dead ends: 67 [2020-11-29 23:43:16,714 INFO L226 Difference]: Without dead ends: 63 [2020-11-29 23:43:16,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-11-29 23:43:16,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-29 23:43:16,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 58. [2020-11-29 23:43:16,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-29 23:43:16,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2020-11-29 23:43:16,737 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 27 [2020-11-29 23:43:16,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:43:16,738 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2020-11-29 23:43:16,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 23:43:16,738 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2020-11-29 23:43:16,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 23:43:16,739 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:43:16,739 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:43:16,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:43:16,949 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:43:16,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:43:16,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1661359253, now seen corresponding path program 3 times [2020-11-29 23:43:16,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:43:16,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560119494] [2020-11-29 23:43:16,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:43:16,972 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:43:16,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443664147] [2020-11-29 23:43:16,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:43:17,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-29 23:43:17,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:43:17,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-29 23:43:17,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:43:17,870 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 23:43:17,870 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:43:17,899 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 23:43:17,899 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:43:18,116 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-11-29 23:43:18,117 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:43:18,117 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:43:18,434 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-11-29 23:43:18,449 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:43:18,453 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:43:18,457 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:43:18,461 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:43:18,464 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:43:18,469 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:43:18,472 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:43:18,476 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:43:18,479 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:43:19,328 WARN L193 SmtUtils]: Spent 843.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 1 [2020-11-29 23:43:20,156 WARN L193 SmtUtils]: Spent 820.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2020-11-29 23:43:20,214 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-29 23:43:20,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560119494] [2020-11-29 23:43:20,215 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:43:20,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443664147] [2020-11-29 23:43:20,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:43:20,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-11-29 23:43:20,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557833531] [2020-11-29 23:43:20,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 23:43:20,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:43:20,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 23:43:20,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-11-29 23:43:20,217 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 13 states. [2020-11-29 23:43:20,767 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2020-11-29 23:43:21,510 WARN L193 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2020-11-29 23:43:22,154 WARN L193 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 29 [2020-11-29 23:43:25,795 WARN L193 SmtUtils]: Spent 3.12 s on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2020-11-29 23:43:27,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:43:27,441 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2020-11-29 23:43:27,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-29 23:43:27,442 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-11-29 23:43:27,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:43:27,443 INFO L225 Difference]: With dead ends: 75 [2020-11-29 23:43:27,443 INFO L226 Difference]: Without dead ends: 71 [2020-11-29 23:43:27,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-11-29 23:43:27,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-29 23:43:27,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-11-29 23:43:27,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-29 23:43:27,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2020-11-29 23:43:27,459 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 27 [2020-11-29 23:43:27,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:43:27,459 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2020-11-29 23:43:27,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 23:43:27,460 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2020-11-29 23:43:27,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 23:43:27,460 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:43:27,460 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:43:27,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:43:27,679 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:43:27,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:43:27,680 INFO L82 PathProgramCache]: Analyzing trace with hash 852012627, now seen corresponding path program 3 times [2020-11-29 23:43:27,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:43:27,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065203589] [2020-11-29 23:43:27,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:43:27,687 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:43:27,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820765043] [2020-11-29 23:43:27,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:43:28,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-29 23:43:28,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:43:28,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-29 23:43:28,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:43:28,747 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 23:43:28,747 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:43:28,983 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:43:28,983 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:43:29,108 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:43:29,113 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 23:43:30,120 WARN L193 SmtUtils]: Spent 998.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 13 [2020-11-29 23:43:31,488 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 30 DAG size of output: 1 [2020-11-29 23:43:31,529 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-29 23:43:31,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065203589] [2020-11-29 23:43:31,529 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:43:31,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820765043] [2020-11-29 23:43:31,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:43:31,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-29 23:43:31,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592707576] [2020-11-29 23:43:31,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 23:43:31,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:43:31,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 23:43:31,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-11-29 23:43:31,531 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 10 states. [2020-11-29 23:43:31,922 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-11-29 23:43:32,297 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2020-11-29 23:43:32,460 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2020-11-29 23:43:35,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:43:35,669 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-11-29 23:43:35,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 23:43:35,670 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-11-29 23:43:35,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:43:35,670 INFO L225 Difference]: With dead ends: 58 [2020-11-29 23:43:35,670 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 23:43:35,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2020-11-29 23:43:35,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 23:43:35,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 23:43:35,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 23:43:35,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 23:43:35,672 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-11-29 23:43:35,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:43:35,672 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 23:43:35,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 23:43:35,672 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 23:43:35,672 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 23:43:35,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-29 23:43:35,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 23:43:36,011 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 105 [2020-11-29 23:43:36,208 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 121 [2020-11-29 23:43:42,712 WARN L193 SmtUtils]: Spent 6.49 s on a formula simplification. DAG size of input: 108 DAG size of output: 41 [2020-11-29 23:43:44,768 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 113 DAG size of output: 41 [2020-11-29 23:43:44,770 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-11-29 23:43:44,771 INFO L277 CegarLoopResult]: At program point L52(lines 21 53) the Hoare annotation is: true [2020-11-29 23:43:44,771 INFO L274 CegarLoopResult]: For program point L15(lines 15 16) no Hoare annotation was computed. [2020-11-29 23:43:44,771 INFO L274 CegarLoopResult]: For program point L15-1(lines 15 16) no Hoare annotation was computed. [2020-11-29 23:43:44,771 INFO L274 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-11-29 23:43:44,771 INFO L274 CegarLoopResult]: For program point L11-2(line 11) no Hoare annotation was computed. [2020-11-29 23:43:44,771 INFO L274 CegarLoopResult]: For program point L40(lines 40 45) no Hoare annotation was computed. [2020-11-29 23:43:44,771 INFO L274 CegarLoopResult]: For program point L40-2(lines 40 45) no Hoare annotation was computed. [2020-11-29 23:43:44,771 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-29 23:43:44,772 INFO L270 CegarLoopResult]: At program point L32-2(lines 32 47) the Hoare annotation is: (let ((.cse0 (<= ULTIMATE.start_main_~Y~0 20)) (.cse1 (<= (* 2 ULTIMATE.start_main_~Y~0) (+ ULTIMATE.start_main_~v~0 (* 2 ULTIMATE.start_main_~X~0)))) (.cse2 (= (+ (* (* 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))) (.cse3 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse4 (<= 0 ULTIMATE.start_main_~Y~0)) (.cse5 (<= ULTIMATE.start_main_~X~0 20))) (or (and .cse0 (= ULTIMATE.start_main_~x~0 0) .cse1 .cse2 (= ULTIMATE.start_main_~y~0 0) .cse3 .cse4 .cse5) (and .cse0 (<= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~X~0 1)) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= 0 ULTIMATE.start_main_~X~0) .cse1 .cse2 (<= (* 4 ULTIMATE.start_main_~Y~0) (+ ULTIMATE.start_main_~v~0 (* 4 ULTIMATE.start_main_~X~0))) .cse3 .cse4 .cse5))) [2020-11-29 23:43:44,772 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 23:43:44,772 INFO L274 CegarLoopResult]: For program point L32-3(lines 32 47) no Hoare annotation was computed. [2020-11-29 23:43:44,772 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 23:43:44,772 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-11-29 23:43:44,772 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 23:43:44,772 INFO L274 CegarLoopResult]: For program point L14(lines 14 17) no Hoare annotation was computed. [2020-11-29 23:43:44,773 INFO L270 CegarLoopResult]: At program point L14-1(lines 36 37) the Hoare annotation is: (let ((.cse0 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse1 (<= ULTIMATE.start_main_~Y~0 20)) (.cse2 (<= (* 2 ULTIMATE.start_main_~Y~0) (+ ULTIMATE.start_main_~v~0 (* 2 ULTIMATE.start_main_~X~0)))) (.cse3 (= (+ (* (* 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))) (.cse4 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse5 (<= 0 ULTIMATE.start_main_~Y~0)) (.cse6 (<= ULTIMATE.start_main_~X~0 20))) (or (and .cse0 .cse1 (= ULTIMATE.start_main_~x~0 0) .cse2 .cse3 (= ULTIMATE.start_main_~y~0 0) .cse4 .cse5 .cse6) (and .cse0 (<= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~X~0 1)) .cse1 (<= 0 ULTIMATE.start_main_~X~0) .cse2 .cse3 (<= (* 4 ULTIMATE.start_main_~Y~0) (+ ULTIMATE.start_main_~v~0 (* 4 ULTIMATE.start_main_~X~0))) .cse4 .cse5 .cse6))) [2020-11-29 23:43:44,773 INFO L274 CegarLoopResult]: For program point L14-2(lines 14 17) no Hoare annotation was computed. [2020-11-29 23:43:44,773 INFO L277 CegarLoopResult]: At program point L14-3(lines 13 19) the Hoare annotation is: true [2020-11-29 23:43:44,773 INFO L274 CegarLoopResult]: For program point L10(lines 10 12) no Hoare annotation was computed. [2020-11-29 23:43:44,773 INFO L274 CegarLoopResult]: For program point L10-1(lines 10 12) no Hoare annotation was computed. [2020-11-29 23:43:44,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 11:43:44 BoogieIcfgContainer [2020-11-29 23:43:44,794 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 23:43:44,795 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 23:43:44,795 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 23:43:44,795 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 23:43:44,796 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:39:37" (3/4) ... [2020-11-29 23:43:44,799 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 23:43:44,810 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-11-29 23:43:44,810 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-29 23:43:44,811 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 23:43:44,811 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 23:43:44,844 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2f7a10c7-ef77-42fb-879c-6b07136f2135/bin/uautomizer/witness.graphml [2020-11-29 23:43:44,845 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 23:43:44,846 INFO L168 Benchmark]: Toolchain (without parser) took 248546.35 ms. Allocated memory was 100.7 MB in the beginning and 182.5 MB in the end (delta: 81.8 MB). Free memory was 66.6 MB in the beginning and 151.4 MB in the end (delta: -84.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:43:44,846 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 100.7 MB. Free memory was 74.1 MB in the beginning and 74.0 MB in the end (delta: 26.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:43:44,847 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.84 ms. Allocated memory is still 100.7 MB. Free memory was 66.3 MB in the beginning and 77.4 MB in the end (delta: -11.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 23:43:44,847 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.21 ms. Allocated memory is still 100.7 MB. Free memory was 77.4 MB in the beginning and 76.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:43:44,847 INFO L168 Benchmark]: Boogie Preprocessor took 26.69 ms. Allocated memory is still 100.7 MB. Free memory was 76.2 MB in the beginning and 74.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:43:44,848 INFO L168 Benchmark]: RCFGBuilder took 364.30 ms. Allocated memory is still 100.7 MB. Free memory was 74.8 MB in the beginning and 61.6 MB in the end (delta: 13.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-29 23:43:44,848 INFO L168 Benchmark]: TraceAbstraction took 247774.73 ms. Allocated memory was 100.7 MB in the beginning and 182.5 MB in the end (delta: 81.8 MB). Free memory was 61.1 MB in the beginning and 154.5 MB in the end (delta: -93.4 MB). Peak memory consumption was 93.8 MB. Max. memory is 16.1 GB. [2020-11-29 23:43:44,849 INFO L168 Benchmark]: Witness Printer took 50.26 ms. Allocated memory is still 182.5 MB. Free memory was 154.5 MB in the beginning and 151.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:43:44,851 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 100.7 MB. Free memory was 74.1 MB in the beginning and 74.0 MB in the end (delta: 26.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 279.84 ms. Allocated memory is still 100.7 MB. Free memory was 66.3 MB in the beginning and 77.4 MB in the end (delta: -11.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.21 ms. Allocated memory is still 100.7 MB. Free memory was 77.4 MB in the beginning and 76.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.69 ms. Allocated memory is still 100.7 MB. Free memory was 76.2 MB in the beginning and 74.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 364.30 ms. Allocated memory is still 100.7 MB. Free memory was 74.8 MB in the beginning and 61.6 MB in the end (delta: 13.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 247774.73 ms. Allocated memory was 100.7 MB in the beginning and 182.5 MB in the end (delta: 81.8 MB). Free memory was 61.1 MB in the beginning and 154.5 MB in the end (delta: -93.4 MB). Peak memory consumption was 93.8 MB. Max. memory is 16.1 GB. * Witness Printer took 50.26 ms. Allocated memory is still 182.5 MB. Free memory was 154.5 MB in the beginning and 151.4 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: 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: ((((((((1 == cond && Y <= 20) && x == 0) && 2 * Y <= v + 2 * X) && x * Y * 2 + Y * 2 == v + y * X * 2 + X) && y == 0) && cond == 1) && 0 <= Y) && X <= 20) || (((((((((1 == cond && x <= X + 1) && Y <= 20) && 0 <= X) && 2 * Y <= v + 2 * X) && x * Y * 2 + Y * 2 == v + y * X * 2 + X) && 4 * Y <= v + 4 * X) && cond == 1) && 0 <= Y) && X <= 20) - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: (((((((Y <= 20 && x == 0) && 2 * Y <= v + 2 * X) && x * Y * 2 + Y * 2 == v + y * X * 2 + X) && y == 0) && cond == 1) && 0 <= Y) && X <= 20) || (((((((((Y <= 20 && x <= X + 1) && 1 <= cond) && 0 <= X) && 2 * Y <= v + 2 * X) && x * Y * 2 + Y * 2 == v + y * X * 2 + X) && 4 * Y <= v + 4 * X) && cond == 1) && 0 <= Y) && X <= 20) - 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: 238.7s, OverallIterations: 21, TraceHistogramMax: 4, AutomataDifference: 24.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 8.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 251 SDtfs, 484 SDslu, 941 SDs, 0 SdLazy, 2592 SolverSat, 269 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 11.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 519 GetRequests, 242 SyntacticMatches, 5 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 17.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 124 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 26 NumberOfFragments, 219 HoareAnnotationTreeSize, 4 FomulaSimplifications, 2621992 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 4 FomulaSimplificationsInter, 1739 FormulaSimplificationTreeSizeReductionInter, 8.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 192.1s SatisfiabilityAnalysisTime, 16.2s InterpolantComputationTime, 432 NumberOfCodeBlocks, 394 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 411 ConstructedInterpolants, 5 QuantifiedInterpolants, 126961 SizeOfPredicates, 242 NumberOfNonLiveVariables, 1947 ConjunctsInSsa, 591 ConjunctsInUnsatCore, 21 InterpolantComputations, 4 PerfectInterpolantSequences, 102/284 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...