./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/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 da2855a3b9d79ea31d743c942a3327e8ed25edbd ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-69874e2 [2020-12-01 15:26:56,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 15:26:56,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 15:26:56,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 15:26:56,898 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 15:26:56,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 15:26:56,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 15:26:56,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 15:26:56,919 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 15:26:56,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 15:26:56,923 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 15:26:56,924 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 15:26:56,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 15:26:56,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 15:26:56,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 15:26:56,930 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 15:26:56,932 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 15:26:56,933 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 15:26:56,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 15:26:56,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 15:26:56,945 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 15:26:56,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 15:26:56,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 15:26:56,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 15:26:56,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 15:26:56,956 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 15:26:56,956 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 15:26:56,973 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 15:26:56,974 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 15:26:56,976 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 15:26:56,976 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 15:26:56,977 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 15:26:56,979 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 15:26:56,980 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 15:26:56,981 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 15:26:56,982 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 15:26:56,983 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 15:26:56,984 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 15:26:56,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 15:26:56,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 15:26:56,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 15:26:56,996 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-01 15:26:57,053 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 15:26:57,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 15:26:57,055 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 15:26:57,055 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 15:26:57,056 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 15:26:57,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 15:26:57,056 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 15:26:57,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 15:26:57,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 15:26:57,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 15:26:57,061 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 15:26:57,061 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 15:26:57,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 15:26:57,062 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 15:26:57,062 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 15:26:57,062 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 15:26:57,062 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 15:26:57,062 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 15:26:57,063 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 15:26:57,063 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 15:26:57,063 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 15:26:57,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 15:26:57,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 15:26:57,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 15:26:57,064 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 15:26:57,064 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 15:26:57,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 15:26:57,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 15:26:57,064 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 15:26:57,065 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_41d67df4-6df0-4315-a8ac-011a8b7a8924/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da2855a3b9d79ea31d743c942a3327e8ed25edbd [2020-12-01 15:26:57,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 15:26:57,459 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 15:26:57,467 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 15:26:57,469 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 15:26:57,470 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 15:26:57,472 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2020-12-01 15:26:57,563 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/bin/uautomizer/data/4fc53642c/b3a70ecb23bd48458db2656bbe27c680/FLAGbee1a9921 [2020-12-01 15:26:58,087 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 15:26:58,087 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2020-12-01 15:26:58,096 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/bin/uautomizer/data/4fc53642c/b3a70ecb23bd48458db2656bbe27c680/FLAGbee1a9921 [2020-12-01 15:26:58,455 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/bin/uautomizer/data/4fc53642c/b3a70ecb23bd48458db2656bbe27c680 [2020-12-01 15:26:58,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 15:26:58,462 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 15:26:58,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 15:26:58,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 15:26:58,471 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 15:26:58,472 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:26:58" (1/1) ... [2020-12-01 15:26:58,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2abf7f23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:58, skipping insertion in model container [2020-12-01 15:26:58,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:26:58" (1/1) ... [2020-12-01 15:26:58,493 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 15:26:58,526 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 15:26:58,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:26:58,796 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 15:26:58,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:26:58,854 INFO L208 MainTranslator]: Completed translation [2020-12-01 15:26:58,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:58 WrapperNode [2020-12-01 15:26:58,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 15:26:58,859 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 15:26:58,860 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 15:26:58,860 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 15:26:58,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:58" (1/1) ... [2020-12-01 15:26:58,898 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:58" (1/1) ... [2020-12-01 15:26:58,939 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 15:26:58,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 15:26:58,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 15:26:58,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 15:26:58,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:58" (1/1) ... [2020-12-01 15:26:58,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:58" (1/1) ... [2020-12-01 15:26:58,950 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:58" (1/1) ... [2020-12-01 15:26:58,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:58" (1/1) ... [2020-12-01 15:26:58,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:58" (1/1) ... [2020-12-01 15:26:58,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:58" (1/1) ... [2020-12-01 15:26:58,964 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:58" (1/1) ... [2020-12-01 15:26:58,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 15:26:58,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 15:26:58,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 15:26:58,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 15:26:58,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/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 [2020-12-01 15:26:59,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 15:26:59,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 15:26:59,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 15:26:59,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 15:26:59,416 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 15:26:59,424 INFO L298 CfgBuilder]: Removed 31 assume(true) statements. [2020-12-01 15:26:59,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:26:59 BoogieIcfgContainer [2020-12-01 15:26:59,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 15:26:59,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 15:26:59,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 15:26:59,443 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 15:26:59,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 03:26:58" (1/3) ... [2020-12-01 15:26:59,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64bf943c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:26:59, skipping insertion in model container [2020-12-01 15:26:59,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:58" (2/3) ... [2020-12-01 15:26:59,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64bf943c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:26:59, skipping insertion in model container [2020-12-01 15:26:59,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:26:59" (3/3) ... [2020-12-01 15:26:59,447 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound5.c [2020-12-01 15:26:59,479 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 15:26:59,483 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-01 15:26:59,497 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-01 15:26:59,528 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 15:26:59,529 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-01 15:26:59,529 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 15:26:59,529 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 15:26:59,529 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 15:26:59,530 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 15:26:59,530 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 15:26:59,530 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 15:26:59,550 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-12-01 15:26:59,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-01 15:26:59,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:26:59,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:26:59,558 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:26:59,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:26:59,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1233216625, now seen corresponding path program 1 times [2020-12-01 15:26:59,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:26:59,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829109659] [2020-12-01 15:26:59,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:26:59,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:59,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:26:59,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829109659] [2020-12-01 15:26:59,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:26:59,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-01 15:26:59,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589370211] [2020-12-01 15:26:59,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-01 15:26:59,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:26:59,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-01 15:26:59,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-01 15:26:59,790 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2020-12-01 15:26:59,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:26:59,814 INFO L93 Difference]: Finished difference Result 77 states and 106 transitions. [2020-12-01 15:26:59,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-01 15:26:59,815 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-01 15:26:59,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:26:59,826 INFO L225 Difference]: With dead ends: 77 [2020-12-01 15:26:59,826 INFO L226 Difference]: Without dead ends: 36 [2020-12-01 15:26:59,830 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 [2020-12-01 15:26:59,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-01 15:26:59,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-01 15:26:59,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-01 15:26:59,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-12-01 15:26:59,871 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 10 [2020-12-01 15:26:59,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:26:59,872 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-12-01 15:26:59,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-01 15:26:59,872 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-12-01 15:26:59,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-01 15:26:59,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:26:59,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:26:59,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-01 15:26:59,874 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:26:59,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:26:59,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1507355568, now seen corresponding path program 1 times [2020-12-01 15:26:59,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:26:59,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675885362] [2020-12-01 15:26:59,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:26:59,904 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:26:59,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287238335] [2020-12-01 15:26:59,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/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 [2020-12-01 15:27:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:00,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-01 15:27:00,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:00,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:27:00,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675885362] [2020-12-01 15:27:00,169 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:27:00,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287238335] [2020-12-01 15:27:00,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:27:00,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:27:00,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373513684] [2020-12-01 15:27:00,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 15:27:00,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:27:00,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 15:27:00,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 15:27:00,175 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 4 states. [2020-12-01 15:27:00,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:27:00,212 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-12-01 15:27:00,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 15:27:00,213 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-01 15:27:00,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:27:00,214 INFO L225 Difference]: With dead ends: 42 [2020-12-01 15:27:00,214 INFO L226 Difference]: Without dead ends: 38 [2020-12-01 15:27:00,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 15:27:00,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-01 15:27:00,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-01 15:27:00,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-01 15:27:00,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-12-01 15:27:00,223 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 11 [2020-12-01 15:27:00,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:27:00,224 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-12-01 15:27:00,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 15:27:00,224 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-12-01 15:27:00,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-01 15:27:00,225 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:27:00,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:27:00,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-01 15:27:00,448 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:27:00,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:00,449 INFO L82 PathProgramCache]: Analyzing trace with hash 515750889, now seen corresponding path program 1 times [2020-12-01 15:27:00,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:00,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891839960] [2020-12-01 15:27:00,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:00,494 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:27:00,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035685329] [2020-12-01 15:27:00,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/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 [2020-12-01 15:27:00,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:00,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-01 15:27:00,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:00,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:27:00,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891839960] [2020-12-01 15:27:00,709 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:27:00,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035685329] [2020-12-01 15:27:00,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:27:00,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-01 15:27:00,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653133808] [2020-12-01 15:27:00,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-01 15:27:00,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:27:00,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-01 15:27:00,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-01 15:27:00,713 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 5 states. [2020-12-01 15:27:00,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:27:00,866 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2020-12-01 15:27:00,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-01 15:27:00,867 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-01 15:27:00,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:27:00,868 INFO L225 Difference]: With dead ends: 66 [2020-12-01 15:27:00,868 INFO L226 Difference]: Without dead ends: 62 [2020-12-01 15:27:00,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-01 15:27:00,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-01 15:27:00,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 39. [2020-12-01 15:27:00,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-01 15:27:00,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-12-01 15:27:00,878 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 12 [2020-12-01 15:27:00,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:27:00,878 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-12-01 15:27:00,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-01 15:27:00,878 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-12-01 15:27:00,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-01 15:27:00,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:27:00,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:27:01,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:27:01,101 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:27:01,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:01,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1270616931, now seen corresponding path program 1 times [2020-12-01 15:27:01,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:01,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357144685] [2020-12-01 15:27:01,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:01,129 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:27:01,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [591563671] [2020-12-01 15:27:01,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/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 [2020-12-01 15:27:01,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:01,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-01 15:27:01,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:27:01,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357144685] [2020-12-01 15:27:01,421 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:27:01,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591563671] [2020-12-01 15:27:01,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:27:01,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-01 15:27:01,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079508412] [2020-12-01 15:27:01,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-01 15:27:01,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:27:01,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-01 15:27:01,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-01 15:27:01,439 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 8 states. [2020-12-01 15:27:01,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:27:01,790 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2020-12-01 15:27:01,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-01 15:27:01,791 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-12-01 15:27:01,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:27:01,796 INFO L225 Difference]: With dead ends: 62 [2020-12-01 15:27:01,796 INFO L226 Difference]: Without dead ends: 60 [2020-12-01 15:27:01,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-12-01 15:27:01,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-01 15:27:01,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2020-12-01 15:27:01,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-01 15:27:01,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2020-12-01 15:27:01,835 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 16 [2020-12-01 15:27:01,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:27:01,836 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2020-12-01 15:27:01,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-01 15:27:01,836 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2020-12-01 15:27:01,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-01 15:27:01,837 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:27:01,838 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:27:02,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:27:02,064 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:27:02,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:02,065 INFO L82 PathProgramCache]: Analyzing trace with hash -533984263, now seen corresponding path program 1 times [2020-12-01 15:27:02,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:02,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913675899] [2020-12-01 15:27:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:02,089 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:27:02,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062904876] [2020-12-01 15:27:02,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/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 [2020-12-01 15:27:02,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:02,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-01 15:27:02,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:02,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:27:02,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913675899] [2020-12-01 15:27:02,269 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:27:02,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062904876] [2020-12-01 15:27:02,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:27:02,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 15:27:02,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507651516] [2020-12-01 15:27:02,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-01 15:27:02,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:27:02,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-01 15:27:02,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-01 15:27:02,273 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand 5 states. [2020-12-01 15:27:02,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:27:02,310 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2020-12-01 15:27:02,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-01 15:27:02,315 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-01 15:27:02,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:27:02,317 INFO L225 Difference]: With dead ends: 85 [2020-12-01 15:27:02,318 INFO L226 Difference]: Without dead ends: 55 [2020-12-01 15:27:02,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-01 15:27:02,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-01 15:27:02,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-12-01 15:27:02,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-01 15:27:02,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2020-12-01 15:27:02,348 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 17 [2020-12-01 15:27:02,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:27:02,348 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2020-12-01 15:27:02,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-01 15:27:02,349 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2020-12-01 15:27:02,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-01 15:27:02,350 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:27:02,350 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:27:02,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:27:02,572 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:27:02,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:02,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1239576457, now seen corresponding path program 1 times [2020-12-01 15:27:02,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:02,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889994507] [2020-12-01 15:27:02,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:02,598 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:27:02,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338919442] [2020-12-01 15:27:02,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/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 [2020-12-01 15:27:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:02,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-01 15:27:02,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:02,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:27:02,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889994507] [2020-12-01 15:27:02,819 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:27:02,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338919442] [2020-12-01 15:27:02,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:27:02,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-01 15:27:02,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747364845] [2020-12-01 15:27:02,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-01 15:27:02,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:27:02,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-01 15:27:02,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-01 15:27:02,829 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand 6 states. [2020-12-01 15:27:02,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:27:02,903 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2020-12-01 15:27:02,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-01 15:27:02,904 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-12-01 15:27:02,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:27:02,905 INFO L225 Difference]: With dead ends: 64 [2020-12-01 15:27:02,906 INFO L226 Difference]: Without dead ends: 60 [2020-12-01 15:27:02,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-01 15:27:02,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-01 15:27:02,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-12-01 15:27:02,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-01 15:27:02,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-12-01 15:27:02,928 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 18 [2020-12-01 15:27:02,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:27:02,929 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-12-01 15:27:02,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-01 15:27:02,929 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-12-01 15:27:02,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-01 15:27:02,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:27:02,931 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:27:03,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-01 15:27:03,148 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:27:03,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:03,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1291970880, now seen corresponding path program 1 times [2020-12-01 15:27:03,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:03,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274194562] [2020-12-01 15:27:03,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:03,179 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:27:03,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [421464882] [2020-12-01 15:27:03,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/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 [2020-12-01 15:27:03,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:03,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-01 15:27:03,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:03,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:27:03,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274194562] [2020-12-01 15:27:03,405 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:27:03,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421464882] [2020-12-01 15:27:03,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:27:03,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-01 15:27:03,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775065587] [2020-12-01 15:27:03,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-01 15:27:03,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:27:03,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-01 15:27:03,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-01 15:27:03,408 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 8 states. [2020-12-01 15:27:03,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:27:03,733 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-12-01 15:27:03,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-01 15:27:03,734 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-12-01 15:27:03,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:27:03,741 INFO L225 Difference]: With dead ends: 66 [2020-12-01 15:27:03,742 INFO L226 Difference]: Without dead ends: 64 [2020-12-01 15:27:03,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-12-01 15:27:03,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-01 15:27:03,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-12-01 15:27:03,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-01 15:27:03,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2020-12-01 15:27:03,766 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 18 [2020-12-01 15:27:03,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:27:03,766 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2020-12-01 15:27:03,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-01 15:27:03,767 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2020-12-01 15:27:03,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-01 15:27:03,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:27:03,768 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:27:03,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:27:03,980 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:27:03,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:03,981 INFO L82 PathProgramCache]: Analyzing trace with hash 226968738, now seen corresponding path program 1 times [2020-12-01 15:27:03,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:03,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798713712] [2020-12-01 15:27:03,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:04,004 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:27:04,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1139301339] [2020-12-01 15:27:04,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/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 [2020-12-01 15:27:04,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:04,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-01 15:27:04,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:04,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:27:04,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798713712] [2020-12-01 15:27:04,211 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:27:04,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139301339] [2020-12-01 15:27:04,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:27:04,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-01 15:27:04,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549829735] [2020-12-01 15:27:04,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-01 15:27:04,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:27:04,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-01 15:27:04,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-01 15:27:04,213 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand 7 states. [2020-12-01 15:27:04,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:27:04,536 INFO L93 Difference]: Finished difference Result 191 states and 227 transitions. [2020-12-01 15:27:04,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-01 15:27:04,538 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-01 15:27:04,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:27:04,540 INFO L225 Difference]: With dead ends: 191 [2020-12-01 15:27:04,541 INFO L226 Difference]: Without dead ends: 187 [2020-12-01 15:27:04,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-12-01 15:27:04,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-01 15:27:04,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 91. [2020-12-01 15:27:04,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-01 15:27:04,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 119 transitions. [2020-12-01 15:27:04,572 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 119 transitions. Word has length 19 [2020-12-01 15:27:04,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:27:04,572 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 119 transitions. [2020-12-01 15:27:04,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-01 15:27:04,573 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 119 transitions. [2020-12-01 15:27:04,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-01 15:27:04,576 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:27:04,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:27:04,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:27:04,804 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:27:04,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:04,805 INFO L82 PathProgramCache]: Analyzing trace with hash -338279005, now seen corresponding path program 1 times [2020-12-01 15:27:04,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:04,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027139932] [2020-12-01 15:27:04,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:04,821 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:27:04,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [173082442] [2020-12-01 15:27:04,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/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 [2020-12-01 15:27:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:04,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-01 15:27:04,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:27:05,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027139932] [2020-12-01 15:27:05,045 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:27:05,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173082442] [2020-12-01 15:27:05,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:27:05,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-01 15:27:05,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807715391] [2020-12-01 15:27:05,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-01 15:27:05,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:27:05,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-01 15:27:05,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-01 15:27:05,049 INFO L87 Difference]: Start difference. First operand 91 states and 119 transitions. Second operand 8 states. [2020-12-01 15:27:05,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:27:05,319 INFO L93 Difference]: Finished difference Result 111 states and 139 transitions. [2020-12-01 15:27:05,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-01 15:27:05,320 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-12-01 15:27:05,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:27:05,322 INFO L225 Difference]: With dead ends: 111 [2020-12-01 15:27:05,322 INFO L226 Difference]: Without dead ends: 109 [2020-12-01 15:27:05,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-01 15:27:05,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-01 15:27:05,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2020-12-01 15:27:05,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-01 15:27:05,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 132 transitions. [2020-12-01 15:27:05,362 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 132 transitions. Word has length 20 [2020-12-01 15:27:05,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:27:05,363 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 132 transitions. [2020-12-01 15:27:05,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-01 15:27:05,363 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 132 transitions. [2020-12-01 15:27:05,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-01 15:27:05,368 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:27:05,368 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:27:05,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-01 15:27:05,584 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:27:05,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:05,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1331579206, now seen corresponding path program 1 times [2020-12-01 15:27:05,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:05,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318873847] [2020-12-01 15:27:05,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:05,603 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:27:05,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734950082] [2020-12-01 15:27:05,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/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 [2020-12-01 15:27:05,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:05,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-01 15:27:05,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:05,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:27:05,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318873847] [2020-12-01 15:27:05,749 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:27:05,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734950082] [2020-12-01 15:27:05,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:27:05,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-01 15:27:05,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919723306] [2020-12-01 15:27:05,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-01 15:27:05,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:27:05,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-01 15:27:05,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-01 15:27:05,751 INFO L87 Difference]: Start difference. First operand 101 states and 132 transitions. Second operand 5 states. [2020-12-01 15:27:05,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:27:05,911 INFO L93 Difference]: Finished difference Result 226 states and 307 transitions. [2020-12-01 15:27:05,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-01 15:27:05,912 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-12-01 15:27:05,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:27:05,916 INFO L225 Difference]: With dead ends: 226 [2020-12-01 15:27:05,917 INFO L226 Difference]: Without dead ends: 224 [2020-12-01 15:27:05,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-01 15:27:05,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-12-01 15:27:05,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 137. [2020-12-01 15:27:05,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-01 15:27:05,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 179 transitions. [2020-12-01 15:27:05,951 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 179 transitions. Word has length 22 [2020-12-01 15:27:05,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:27:05,952 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 179 transitions. [2020-12-01 15:27:05,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-01 15:27:05,952 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 179 transitions. [2020-12-01 15:27:05,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-01 15:27:05,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:27:05,956 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:27:06,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:27:06,172 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:27:06,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:06,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1657245482, now seen corresponding path program 1 times [2020-12-01 15:27:06,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:06,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113864333] [2020-12-01 15:27:06,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:06,196 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:27:06,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256245877] [2020-12-01 15:27:06,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/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 [2020-12-01 15:27:06,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:06,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-01 15:27:06,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:06,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:27:06,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113864333] [2020-12-01 15:27:06,392 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:27:06,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256245877] [2020-12-01 15:27:06,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:27:06,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-01 15:27:06,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148140360] [2020-12-01 15:27:06,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-01 15:27:06,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:27:06,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-01 15:27:06,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-01 15:27:06,395 INFO L87 Difference]: Start difference. First operand 137 states and 179 transitions. Second operand 7 states. [2020-12-01 15:27:06,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:27:06,609 INFO L93 Difference]: Finished difference Result 210 states and 273 transitions. [2020-12-01 15:27:06,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-01 15:27:06,610 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-12-01 15:27:06,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:27:06,612 INFO L225 Difference]: With dead ends: 210 [2020-12-01 15:27:06,613 INFO L226 Difference]: Without dead ends: 208 [2020-12-01 15:27:06,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:27:06,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-01 15:27:06,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 191. [2020-12-01 15:27:06,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-01 15:27:06,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 257 transitions. [2020-12-01 15:27:06,638 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 257 transitions. Word has length 23 [2020-12-01 15:27:06,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:27:06,639 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 257 transitions. [2020-12-01 15:27:06,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-01 15:27:06,639 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 257 transitions. [2020-12-01 15:27:06,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-01 15:27:06,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:27:06,643 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:27:06,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:27:06,868 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:27:06,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:06,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1336387389, now seen corresponding path program 1 times [2020-12-01 15:27:06,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:06,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447735088] [2020-12-01 15:27:06,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:06,906 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:27:06,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478167425] [2020-12-01 15:27:06,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/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 [2020-12-01 15:27:06,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:06,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-01 15:27:06,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:27:07,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447735088] [2020-12-01 15:27:07,087 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:27:07,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478167425] [2020-12-01 15:27:07,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:27:07,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-01 15:27:07,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730080408] [2020-12-01 15:27:07,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-01 15:27:07,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:27:07,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-01 15:27:07,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-01 15:27:07,090 INFO L87 Difference]: Start difference. First operand 191 states and 257 transitions. Second operand 6 states. [2020-12-01 15:27:07,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:27:07,144 INFO L93 Difference]: Finished difference Result 280 states and 375 transitions. [2020-12-01 15:27:07,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-01 15:27:07,145 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-12-01 15:27:07,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:27:07,147 INFO L225 Difference]: With dead ends: 280 [2020-12-01 15:27:07,147 INFO L226 Difference]: Without dead ends: 191 [2020-12-01 15:27:07,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-01 15:27:07,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-12-01 15:27:07,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2020-12-01 15:27:07,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-01 15:27:07,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 256 transitions. [2020-12-01 15:27:07,173 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 256 transitions. Word has length 23 [2020-12-01 15:27:07,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:27:07,173 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 256 transitions. [2020-12-01 15:27:07,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-01 15:27:07,173 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 256 transitions. [2020-12-01 15:27:07,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-01 15:27:07,174 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:27:07,174 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:27:07,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-01 15:27:07,395 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:27:07,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:07,395 INFO L82 PathProgramCache]: Analyzing trace with hash 365432544, now seen corresponding path program 1 times [2020-12-01 15:27:07,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:07,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599518759] [2020-12-01 15:27:07,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:07,408 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:27:07,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099097081] [2020-12-01 15:27:07,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/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 [2020-12-01 15:27:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:07,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-01 15:27:07,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:07,595 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:27:07,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599518759] [2020-12-01 15:27:07,596 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:27:07,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099097081] [2020-12-01 15:27:07,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:27:07,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-01 15:27:07,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708052373] [2020-12-01 15:27:07,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-01 15:27:07,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:27:07,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-01 15:27:07,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-01 15:27:07,599 INFO L87 Difference]: Start difference. First operand 191 states and 256 transitions. Second operand 7 states. [2020-12-01 15:27:07,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:27:07,660 INFO L93 Difference]: Finished difference Result 303 states and 411 transitions. [2020-12-01 15:27:07,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-01 15:27:07,660 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-12-01 15:27:07,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:27:07,665 INFO L225 Difference]: With dead ends: 303 [2020-12-01 15:27:07,665 INFO L226 Difference]: Without dead ends: 196 [2020-12-01 15:27:07,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-01 15:27:07,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-12-01 15:27:07,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2020-12-01 15:27:07,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-01 15:27:07,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 260 transitions. [2020-12-01 15:27:07,692 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 260 transitions. Word has length 24 [2020-12-01 15:27:07,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:27:07,692 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 260 transitions. [2020-12-01 15:27:07,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-01 15:27:07,693 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 260 transitions. [2020-12-01 15:27:07,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-01 15:27:07,694 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:27:07,694 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:27:07,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-01 15:27:07,920 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:27:07,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:07,921 INFO L82 PathProgramCache]: Analyzing trace with hash 872540784, now seen corresponding path program 2 times [2020-12-01 15:27:07,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:07,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536618309] [2020-12-01 15:27:07,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:07,930 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:27:07,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [158410084] [2020-12-01 15:27:07,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/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 [2020-12-01 15:27:08,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:27:08,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:27:08,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-01 15:27:08,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:27:08,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536618309] [2020-12-01 15:27:08,099 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:27:08,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158410084] [2020-12-01 15:27:08,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:27:08,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-01 15:27:08,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239801164] [2020-12-01 15:27:08,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-01 15:27:08,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:27:08,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-01 15:27:08,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-01 15:27:08,101 INFO L87 Difference]: Start difference. First operand 195 states and 260 transitions. Second operand 8 states. [2020-12-01 15:27:08,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:27:08,186 INFO L93 Difference]: Finished difference Result 223 states and 292 transitions. [2020-12-01 15:27:08,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-01 15:27:08,187 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-12-01 15:27:08,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:27:08,189 INFO L225 Difference]: With dead ends: 223 [2020-12-01 15:27:08,189 INFO L226 Difference]: Without dead ends: 219 [2020-12-01 15:27:08,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:27:08,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-12-01 15:27:08,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 202. [2020-12-01 15:27:08,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-12-01 15:27:08,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 268 transitions. [2020-12-01 15:27:08,214 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 268 transitions. Word has length 25 [2020-12-01 15:27:08,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:27:08,215 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 268 transitions. [2020-12-01 15:27:08,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-01 15:27:08,215 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 268 transitions. [2020-12-01 15:27:08,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-01 15:27:08,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:27:08,216 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:27:08,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-01 15:27:08,444 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:27:08,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:08,445 INFO L82 PathProgramCache]: Analyzing trace with hash 820146361, now seen corresponding path program 1 times [2020-12-01 15:27:08,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:08,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718049251] [2020-12-01 15:27:08,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:08,462 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:27:08,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [454312201] [2020-12-01 15:27:08,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/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 [2020-12-01 15:27:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:08,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-01 15:27:08,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:08,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:27:08,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718049251] [2020-12-01 15:27:08,747 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:27:08,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454312201] [2020-12-01 15:27:08,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:27:08,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-01 15:27:08,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444114371] [2020-12-01 15:27:08,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-01 15:27:08,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:27:08,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-01 15:27:08,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-01 15:27:08,753 INFO L87 Difference]: Start difference. First operand 202 states and 268 transitions. Second operand 8 states. [2020-12-01 15:27:09,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:27:09,084 INFO L93 Difference]: Finished difference Result 216 states and 276 transitions. [2020-12-01 15:27:09,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-01 15:27:09,085 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-12-01 15:27:09,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:27:09,087 INFO L225 Difference]: With dead ends: 216 [2020-12-01 15:27:09,087 INFO L226 Difference]: Without dead ends: 214 [2020-12-01 15:27:09,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-12-01 15:27:09,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-12-01 15:27:09,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 202. [2020-12-01 15:27:09,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-12-01 15:27:09,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 266 transitions. [2020-12-01 15:27:09,113 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 266 transitions. Word has length 25 [2020-12-01 15:27:09,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:27:09,113 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 266 transitions. [2020-12-01 15:27:09,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-01 15:27:09,114 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 266 transitions. [2020-12-01 15:27:09,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-01 15:27:09,114 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:27:09,115 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:27:09,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:27:09,328 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:27:09,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:09,329 INFO L82 PathProgramCache]: Analyzing trace with hash -2113141412, now seen corresponding path program 1 times [2020-12-01 15:27:09,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:09,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329630770] [2020-12-01 15:27:09,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:09,350 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:27:09,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96489883] [2020-12-01 15:27:09,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/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 [2020-12-01 15:27:09,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:09,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-01 15:27:09,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:09,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:27:09,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329630770] [2020-12-01 15:27:09,557 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:27:09,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96489883] [2020-12-01 15:27:09,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:27:09,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-01 15:27:09,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061669704] [2020-12-01 15:27:09,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-01 15:27:09,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:27:09,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-01 15:27:09,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-01 15:27:09,560 INFO L87 Difference]: Start difference. First operand 202 states and 266 transitions. Second operand 9 states. [2020-12-01 15:27:10,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:27:10,007 INFO L93 Difference]: Finished difference Result 336 states and 421 transitions. [2020-12-01 15:27:10,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-01 15:27:10,008 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-12-01 15:27:10,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:27:10,012 INFO L225 Difference]: With dead ends: 336 [2020-12-01 15:27:10,012 INFO L226 Difference]: Without dead ends: 334 [2020-12-01 15:27:10,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-12-01 15:27:10,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-12-01 15:27:10,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 243. [2020-12-01 15:27:10,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-12-01 15:27:10,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 321 transitions. [2020-12-01 15:27:10,044 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 321 transitions. Word has length 27 [2020-12-01 15:27:10,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:27:10,046 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 321 transitions. [2020-12-01 15:27:10,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-01 15:27:10,046 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 321 transitions. [2020-12-01 15:27:10,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-01 15:27:10,047 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:27:10,047 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:27:10,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-01 15:27:10,260 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:27:10,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:10,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1240831363, now seen corresponding path program 2 times [2020-12-01 15:27:10,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:10,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850610459] [2020-12-01 15:27:10,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:10,269 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:27:10,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1270849891] [2020-12-01 15:27:10,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/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 [2020-12-01 15:27:10,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:27:10,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:27:10,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-01 15:27:10,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:27:10,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850610459] [2020-12-01 15:27:10,479 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:27:10,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270849891] [2020-12-01 15:27:10,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:27:10,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-01 15:27:10,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496887921] [2020-12-01 15:27:10,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-01 15:27:10,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:27:10,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-01 15:27:10,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:27:10,482 INFO L87 Difference]: Start difference. First operand 243 states and 321 transitions. Second operand 10 states. [2020-12-01 15:27:10,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:27:10,603 INFO L93 Difference]: Finished difference Result 412 states and 541 transitions. [2020-12-01 15:27:10,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-01 15:27:10,604 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-12-01 15:27:10,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:27:10,606 INFO L225 Difference]: With dead ends: 412 [2020-12-01 15:27:10,606 INFO L226 Difference]: Without dead ends: 217 [2020-12-01 15:27:10,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2020-12-01 15:27:10,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-12-01 15:27:10,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 161. [2020-12-01 15:27:10,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-12-01 15:27:10,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 199 transitions. [2020-12-01 15:27:10,635 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 199 transitions. Word has length 30 [2020-12-01 15:27:10,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:27:10,635 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 199 transitions. [2020-12-01 15:27:10,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-01 15:27:10,635 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 199 transitions. [2020-12-01 15:27:10,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-01 15:27:10,636 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:27:10,637 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:27:10,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-01 15:27:10,864 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:27:10,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:10,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1752801508, now seen corresponding path program 1 times [2020-12-01 15:27:10,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:10,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775040000] [2020-12-01 15:27:10,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:10,875 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:27:10,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725762983] [2020-12-01 15:27:10,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/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 [2020-12-01 15:27:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:10,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-01 15:27:10,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:27:11,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775040000] [2020-12-01 15:27:11,077 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:27:11,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725762983] [2020-12-01 15:27:11,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:27:11,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-01 15:27:11,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843076614] [2020-12-01 15:27:11,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-01 15:27:11,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:27:11,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-01 15:27:11,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-01 15:27:11,082 INFO L87 Difference]: Start difference. First operand 161 states and 199 transitions. Second operand 8 states. [2020-12-01 15:27:11,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:27:11,153 INFO L93 Difference]: Finished difference Result 217 states and 271 transitions. [2020-12-01 15:27:11,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-01 15:27:11,154 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-12-01 15:27:11,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:27:11,155 INFO L225 Difference]: With dead ends: 217 [2020-12-01 15:27:11,155 INFO L226 Difference]: Without dead ends: 163 [2020-12-01 15:27:11,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:27:11,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-01 15:27:11,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2020-12-01 15:27:11,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-12-01 15:27:11,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 195 transitions. [2020-12-01 15:27:11,174 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 195 transitions. Word has length 30 [2020-12-01 15:27:11,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:27:11,174 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 195 transitions. [2020-12-01 15:27:11,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-01 15:27:11,175 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 195 transitions. [2020-12-01 15:27:11,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-01 15:27:11,175 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:27:11,175 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:27:11,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-01 15:27:11,388 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:27:11,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:11,389 INFO L82 PathProgramCache]: Analyzing trace with hash 389368345, now seen corresponding path program 2 times [2020-12-01 15:27:11,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:11,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169654902] [2020-12-01 15:27:11,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:11,408 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:27:11,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125271209] [2020-12-01 15:27:11,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/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 [2020-12-01 15:27:11,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:27:11,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:27:11,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-01 15:27:11,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-01 15:27:11,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169654902] [2020-12-01 15:27:11,531 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:27:11,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125271209] [2020-12-01 15:27:11,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:27:11,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-01 15:27:11,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93929873] [2020-12-01 15:27:11,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-01 15:27:11,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:27:11,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-01 15:27:11,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-01 15:27:11,536 INFO L87 Difference]: Start difference. First operand 161 states and 195 transitions. Second operand 5 states. [2020-12-01 15:27:11,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:27:11,649 INFO L93 Difference]: Finished difference Result 251 states and 311 transitions. [2020-12-01 15:27:11,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-01 15:27:11,650 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-12-01 15:27:11,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:27:11,651 INFO L225 Difference]: With dead ends: 251 [2020-12-01 15:27:11,651 INFO L226 Difference]: Without dead ends: 210 [2020-12-01 15:27:11,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-01 15:27:11,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-12-01 15:27:11,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 178. [2020-12-01 15:27:11,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-01 15:27:11,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 219 transitions. [2020-12-01 15:27:11,668 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 219 transitions. Word has length 31 [2020-12-01 15:27:11,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:27:11,668 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 219 transitions. [2020-12-01 15:27:11,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-01 15:27:11,669 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 219 transitions. [2020-12-01 15:27:11,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-01 15:27:11,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:27:11,669 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:27:11,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:27:11,896 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:27:11,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:11,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1035876869, now seen corresponding path program 1 times [2020-12-01 15:27:11,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:11,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329942998] [2020-12-01 15:27:11,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:11,905 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:27:11,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1906187947] [2020-12-01 15:27:11,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/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 [2020-12-01 15:27:11,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:11,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-01 15:27:11,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:12,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:27:12,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329942998] [2020-12-01 15:27:12,158 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:27:12,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906187947] [2020-12-01 15:27:12,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:27:12,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-01 15:27:12,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134330886] [2020-12-01 15:27:12,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-01 15:27:12,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:27:12,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-01 15:27:12,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-12-01 15:27:12,160 INFO L87 Difference]: Start difference. First operand 178 states and 219 transitions. Second operand 11 states. [2020-12-01 15:27:12,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:27:12,599 INFO L93 Difference]: Finished difference Result 246 states and 304 transitions. [2020-12-01 15:27:12,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-01 15:27:12,600 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-12-01 15:27:12,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:27:12,602 INFO L225 Difference]: With dead ends: 246 [2020-12-01 15:27:12,602 INFO L226 Difference]: Without dead ends: 244 [2020-12-01 15:27:12,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-12-01 15:27:12,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-12-01 15:27:12,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 171. [2020-12-01 15:27:12,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-12-01 15:27:12,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 209 transitions. [2020-12-01 15:27:12,624 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 209 transitions. Word has length 32 [2020-12-01 15:27:12,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:27:12,624 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 209 transitions. [2020-12-01 15:27:12,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-01 15:27:12,624 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 209 transitions. [2020-12-01 15:27:12,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-01 15:27:12,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:27:12,625 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:27:12,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:27:12,852 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:27:12,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:12,853 INFO L82 PathProgramCache]: Analyzing trace with hash -559947050, now seen corresponding path program 1 times [2020-12-01 15:27:12,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:12,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828228366] [2020-12-01 15:27:12,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:12,864 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:27:12,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868745251] [2020-12-01 15:27:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/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 [2020-12-01 15:27:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:12,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-01 15:27:12,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:27:13,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828228366] [2020-12-01 15:27:13,359 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:27:13,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868745251] [2020-12-01 15:27:13,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:27:13,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-01 15:27:13,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661048298] [2020-12-01 15:27:13,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-01 15:27:13,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:27:13,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-01 15:27:13,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-12-01 15:27:13,362 INFO L87 Difference]: Start difference. First operand 171 states and 209 transitions. Second operand 13 states. [2020-12-01 15:27:14,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:27:14,087 INFO L93 Difference]: Finished difference Result 250 states and 309 transitions. [2020-12-01 15:27:14,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-01 15:27:14,088 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-12-01 15:27:14,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:27:14,090 INFO L225 Difference]: With dead ends: 250 [2020-12-01 15:27:14,090 INFO L226 Difference]: Without dead ends: 205 [2020-12-01 15:27:14,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2020-12-01 15:27:14,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-12-01 15:27:14,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 162. [2020-12-01 15:27:14,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-01 15:27:14,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 197 transitions. [2020-12-01 15:27:14,109 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 197 transitions. Word has length 33 [2020-12-01 15:27:14,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:27:14,110 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 197 transitions. [2020-12-01 15:27:14,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-01 15:27:14,110 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 197 transitions. [2020-12-01 15:27:14,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-01 15:27:14,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:27:14,111 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:27:14,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-01 15:27:14,336 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:27:14,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:14,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1005324756, now seen corresponding path program 1 times [2020-12-01 15:27:14,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:14,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131069294] [2020-12-01 15:27:14,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:14,346 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:27:14,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [567466324] [2020-12-01 15:27:14,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:27:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:27:14,424 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:27:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:27:14,456 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:27:14,533 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:27:14,534 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-01 15:27:14,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-01 15:27:14,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 03:27:14 BoogieIcfgContainer [2020-12-01 15:27:14,800 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 15:27:14,800 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 15:27:14,800 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 15:27:14,800 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 15:27:14,801 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:26:59" (3/4) ... [2020-12-01 15:27:14,803 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-01 15:27:14,859 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_41d67df4-6df0-4315-a8ac-011a8b7a8924/bin/uautomizer/witness.graphml [2020-12-01 15:27:14,860 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 15:27:14,861 INFO L168 Benchmark]: Toolchain (without parser) took 16398.75 ms. Allocated memory was 107.0 MB in the beginning and 157.3 MB in the end (delta: 50.3 MB). Free memory was 71.2 MB in the beginning and 61.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 58.8 MB. Max. memory is 16.1 GB. [2020-12-01 15:27:14,862 INFO L168 Benchmark]: CDTParser took 0.40 ms. Allocated memory is still 107.0 MB. Free memory was 76.9 MB in the beginning and 76.9 MB in the end (delta: 32.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:27:14,862 INFO L168 Benchmark]: CACSL2BoogieTranslator took 391.20 ms. Allocated memory is still 107.0 MB. Free memory was 71.0 MB in the beginning and 81.6 MB in the end (delta: -10.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-01 15:27:14,863 INFO L168 Benchmark]: Boogie Procedure Inliner took 79.71 ms. Allocated memory is still 107.0 MB. Free memory was 81.6 MB in the beginning and 79.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:27:14,863 INFO L168 Benchmark]: Boogie Preprocessor took 27.36 ms. Allocated memory is still 107.0 MB. Free memory was 79.9 MB in the beginning and 78.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:27:14,864 INFO L168 Benchmark]: RCFGBuilder took 458.38 ms. Allocated memory is still 107.0 MB. Free memory was 78.8 MB in the beginning and 61.1 MB in the end (delta: 17.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-12-01 15:27:14,864 INFO L168 Benchmark]: TraceAbstraction took 15371.33 ms. Allocated memory was 107.0 MB in the beginning and 157.3 MB in the end (delta: 50.3 MB). Free memory was 60.6 MB in the beginning and 66.1 MB in the end (delta: -5.5 MB). Peak memory consumption was 46.8 MB. Max. memory is 16.1 GB. [2020-12-01 15:27:14,865 INFO L168 Benchmark]: Witness Printer took 59.67 ms. Allocated memory is still 157.3 MB. Free memory was 66.1 MB in the beginning and 61.9 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-01 15:27:14,867 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40 ms. Allocated memory is still 107.0 MB. Free memory was 76.9 MB in the beginning and 76.9 MB in the end (delta: 32.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 391.20 ms. Allocated memory is still 107.0 MB. Free memory was 71.0 MB in the beginning and 81.6 MB in the end (delta: -10.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 79.71 ms. Allocated memory is still 107.0 MB. Free memory was 81.6 MB in the beginning and 79.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.36 ms. Allocated memory is still 107.0 MB. Free memory was 79.9 MB in the beginning and 78.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 458.38 ms. Allocated memory is still 107.0 MB. Free memory was 78.8 MB in the beginning and 61.1 MB in the end (delta: 17.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15371.33 ms. Allocated memory was 107.0 MB in the beginning and 157.3 MB in the end (delta: 50.3 MB). Free memory was 60.6 MB in the beginning and 66.1 MB in the end (delta: -5.5 MB). Peak memory consumption was 46.8 MB. Max. memory is 16.1 GB. * Witness Printer took 59.67 ms. Allocated memory is still 157.3 MB. Free memory was 66.1 MB in the beginning and 61.9 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L18] int counter = 0; VAL [counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) VAL [counter=0] [L8] COND FALSE !(!cond) VAL [counter=0] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [counter=1] [L41] EXPR counter++ VAL [counter=2] [L41] COND TRUE counter++<5 [L42] COND TRUE !(c >= b) VAL [counter=2] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [counter=2] [L34] EXPR counter++ VAL [counter=3] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [counter=3] [L41] EXPR counter++ VAL [counter=4] [L41] COND TRUE counter++<5 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [counter=4] [L48] EXPR counter++ VAL [counter=5] [L48] COND TRUE counter++<5 [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L54] COND TRUE !(c >= 2 * v) VAL [counter=5] [L59] c = c - v [L60] k = k + d VAL [counter=5] [L41] EXPR counter++ VAL [counter=6] [L41] COND FALSE !(counter++<5) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [counter=6] [L34] EXPR counter++ VAL [counter=7] [L34] COND FALSE !(counter++<5) [L11] COND TRUE !(cond) VAL [counter=7] [L4] __assert_fail("0", "egcd3-ll.c", 4, "reach_error") VAL [counter=7] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 40 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 15.2s, OverallIterations: 22, TraceHistogramMax: 4, AutomataDifference: 4.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 849 SDtfs, 2580 SDslu, 2214 SDs, 0 SdLazy, 1411 SolverSat, 212 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 511 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=243occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 21 MinimizatonAttempts, 571 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 504 NumberOfCodeBlocks, 504 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 445 ConstructedInterpolants, 0 QuantifiedInterpolants, 73146 SizeOfPredicates, 132 NumberOfNonLiveVariables, 2419 ConjunctsInSsa, 340 ConjunctsInUnsatCore, 21 InterpolantComputations, 11 PerfectInterpolantSequences, 64/124 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 incorrect! Received shutdown request...