./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-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_c0ad23a1-033f-4f84-ac93-fffbe51c7334/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/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 39bcfd9082233c69fe35086fe400d50c1cc05bc1 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 15:54:23,173 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 15:54:23,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 15:54:23,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 15:54:23,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 15:54:23,251 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 15:54:23,253 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 15:54:23,255 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 15:54:23,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 15:54:23,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 15:54:23,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 15:54:23,261 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 15:54:23,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 15:54:23,263 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 15:54:23,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 15:54:23,266 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 15:54:23,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 15:54:23,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 15:54:23,271 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 15:54:23,273 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 15:54:23,275 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 15:54:23,279 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 15:54:23,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 15:54:23,281 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 15:54:23,285 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 15:54:23,285 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 15:54:23,286 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 15:54:23,287 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 15:54:23,287 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 15:54:23,289 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 15:54:23,289 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 15:54:23,290 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 15:54:23,291 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 15:54:23,292 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 15:54:23,293 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 15:54:23,294 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 15:54:23,295 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 15:54:23,295 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 15:54:23,295 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 15:54:23,296 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 15:54:23,297 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 15:54:23,298 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-01 15:54:23,327 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 15:54:23,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 15:54:23,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 15:54:23,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 15:54:23,329 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 15:54:23,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 15:54:23,330 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 15:54:23,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 15:54:23,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 15:54:23,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 15:54:23,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 15:54:23,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 15:54:23,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 15:54:23,331 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 15:54:23,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 15:54:23,332 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 15:54:23,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 15:54:23,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 15:54:23,332 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 15:54:23,332 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 15:54:23,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 15:54:23,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 15:54:23,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 15:54:23,333 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 15:54:23,333 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 15:54:23,334 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 15:54:23,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 15:54:23,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 15:54:23,334 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 15:54:23,334 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_c0ad23a1-033f-4f84-ac93-fffbe51c7334/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39bcfd9082233c69fe35086fe400d50c1cc05bc1 [2020-12-01 15:54:23,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 15:54:23,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 15:54:23,595 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 15:54:23,596 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 15:54:23,599 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 15:54:23,600 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound5.c [2020-12-01 15:54:23,668 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/bin/uautomizer/data/bf81ed22c/bc6f6014d7b94282a431c9f3f1b88ecc/FLAGf0d709a61 [2020-12-01 15:54:24,190 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 15:54:24,190 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound5.c [2020-12-01 15:54:24,199 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/bin/uautomizer/data/bf81ed22c/bc6f6014d7b94282a431c9f3f1b88ecc/FLAGf0d709a61 [2020-12-01 15:54:24,557 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/bin/uautomizer/data/bf81ed22c/bc6f6014d7b94282a431c9f3f1b88ecc [2020-12-01 15:54:24,559 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 15:54:24,561 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 15:54:24,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 15:54:24,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 15:54:24,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 15:54:24,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:54:24" (1/1) ... [2020-12-01 15:54:24,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f003d4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:54:24, skipping insertion in model container [2020-12-01 15:54:24,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:54:24" (1/1) ... [2020-12-01 15:54:24,592 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 15:54:24,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 15:54:24,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:54:24,903 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 15:54:24,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:54:24,940 INFO L208 MainTranslator]: Completed translation [2020-12-01 15:54:24,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:54:24 WrapperNode [2020-12-01 15:54:24,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 15:54:24,942 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 15:54:24,942 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 15:54:24,942 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 15:54:24,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:54:24" (1/1) ... [2020-12-01 15:54:24,959 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:54:24" (1/1) ... [2020-12-01 15:54:24,983 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 15:54:24,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 15:54:24,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 15:54:24,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 15:54:24,994 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:54:24" (1/1) ... [2020-12-01 15:54:24,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:54:24" (1/1) ... [2020-12-01 15:54:24,996 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:54:24" (1/1) ... [2020-12-01 15:54:24,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:54:24" (1/1) ... [2020-12-01 15:54:25,002 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:54:24" (1/1) ... [2020-12-01 15:54:25,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:54:24" (1/1) ... [2020-12-01 15:54:25,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:54:24" (1/1) ... [2020-12-01 15:54:25,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 15:54:25,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 15:54:25,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 15:54:25,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 15:54:25,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:54:24" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/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 15:54:25,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 15:54:25,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 15:54:25,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 15:54:25,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 15:54:25,450 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 15:54:25,451 INFO L298 CfgBuilder]: Removed 38 assume(true) statements. [2020-12-01 15:54:25,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:54:25 BoogieIcfgContainer [2020-12-01 15:54:25,467 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 15:54:25,469 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 15:54:25,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 15:54:25,473 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 15:54:25,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 03:54:24" (1/3) ... [2020-12-01 15:54:25,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c3cdbed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:54:25, skipping insertion in model container [2020-12-01 15:54:25,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:54:24" (2/3) ... [2020-12-01 15:54:25,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c3cdbed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:54:25, skipping insertion in model container [2020-12-01 15:54:25,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:54:25" (3/3) ... [2020-12-01 15:54:25,477 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound5.c [2020-12-01 15:54:25,500 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 15:54:25,506 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-01 15:54:25,518 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-01 15:54:25,550 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 15:54:25,551 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-01 15:54:25,551 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 15:54:25,551 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 15:54:25,551 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 15:54:25,551 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 15:54:25,551 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 15:54:25,551 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 15:54:25,565 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-12-01 15:54:25,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-01 15:54:25,570 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:54:25,584 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:54:25,585 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:54:25,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:54:25,592 INFO L82 PathProgramCache]: Analyzing trace with hash -141659761, now seen corresponding path program 1 times [2020-12-01 15:54:25,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:54:25,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323363839] [2020-12-01 15:54:25,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:54:25,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:54:25,752 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 15:54:25,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323363839] [2020-12-01 15:54:25,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:54:25,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-01 15:54:25,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113348305] [2020-12-01 15:54:25,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-01 15:54:25,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:54:25,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-01 15:54:25,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-01 15:54:25,776 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2020-12-01 15:54:25,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:54:25,794 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2020-12-01 15:54:25,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-01 15:54:25,795 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-12-01 15:54:25,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:54:25,804 INFO L225 Difference]: With dead ends: 83 [2020-12-01 15:54:25,804 INFO L226 Difference]: Without dead ends: 39 [2020-12-01 15:54:25,807 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 15:54:25,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-01 15:54:25,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-01 15:54:25,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-01 15:54:25,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-12-01 15:54:25,844 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 13 [2020-12-01 15:54:25,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:54:25,844 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-12-01 15:54:25,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-01 15:54:25,845 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-12-01 15:54:25,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-01 15:54:25,845 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:54:25,845 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:54:25,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-01 15:54:25,846 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:54:25,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:54:25,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1057766562, now seen corresponding path program 1 times [2020-12-01 15:54:25,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:54:25,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94186141] [2020-12-01 15:54:25,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:54:25,869 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:54:25,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849475636] [2020-12-01 15:54:25,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/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 15:54:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:54:25,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-01 15:54:26,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:54:26,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:54:26,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94186141] [2020-12-01 15:54:26,101 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:54:26,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849475636] [2020-12-01 15:54:26,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:54:26,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:54:26,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255676198] [2020-12-01 15:54:26,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 15:54:26,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:54:26,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 15:54:26,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 15:54:26,105 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 4 states. [2020-12-01 15:54:26,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:54:26,125 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-12-01 15:54:26,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 15:54:26,126 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-01 15:54:26,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:54:26,127 INFO L225 Difference]: With dead ends: 49 [2020-12-01 15:54:26,127 INFO L226 Difference]: Without dead ends: 41 [2020-12-01 15:54:26,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 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 15:54:26,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-01 15:54:26,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-01 15:54:26,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-01 15:54:26,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-12-01 15:54:26,135 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 14 [2020-12-01 15:54:26,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:54:26,136 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-12-01 15:54:26,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 15:54:26,136 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-12-01 15:54:26,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-01 15:54:26,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:54:26,137 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:54:26,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-01 15:54:26,362 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:54:26,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:54:26,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1568674210, now seen corresponding path program 1 times [2020-12-01 15:54:26,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:54:26,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069310565] [2020-12-01 15:54:26,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:54:26,389 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:54:26,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491072190] [2020-12-01 15:54:26,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/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 15:54:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:54:26,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-01 15:54:26,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:54:26,569 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 15:54:26,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069310565] [2020-12-01 15:54:26,569 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:54:26,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491072190] [2020-12-01 15:54:26,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:54:26,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-01 15:54:26,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592390016] [2020-12-01 15:54:26,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-01 15:54:26,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:54:26,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-01 15:54:26,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-01 15:54:26,572 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 5 states. [2020-12-01 15:54:26,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:54:26,660 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2020-12-01 15:54:26,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-01 15:54:26,661 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-01 15:54:26,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:54:26,662 INFO L225 Difference]: With dead ends: 69 [2020-12-01 15:54:26,662 INFO L226 Difference]: Without dead ends: 61 [2020-12-01 15:54:26,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-01 15:54:26,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-01 15:54:26,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2020-12-01 15:54:26,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-01 15:54:26,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-12-01 15:54:26,670 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 15 [2020-12-01 15:54:26,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:54:26,670 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-12-01 15:54:26,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-01 15:54:26,671 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-12-01 15:54:26,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-01 15:54:26,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:54:26,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:54:26,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:54:26,898 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:54:26,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:54:26,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1384108475, now seen corresponding path program 1 times [2020-12-01 15:54:26,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:54:26,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256721650] [2020-12-01 15:54:26,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:54:26,913 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:54:26,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008337170] [2020-12-01 15:54:26,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/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 15:54:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:54:26,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-01 15:54:26,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:54:27,102 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 15:54:27,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256721650] [2020-12-01 15:54:27,103 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:54:27,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008337170] [2020-12-01 15:54:27,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:54:27,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-01 15:54:27,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135174027] [2020-12-01 15:54:27,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-01 15:54:27,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:54:27,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-01 15:54:27,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-01 15:54:27,105 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 8 states. [2020-12-01 15:54:27,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:54:27,373 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2020-12-01 15:54:27,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-01 15:54:27,374 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-12-01 15:54:27,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:54:27,376 INFO L225 Difference]: With dead ends: 80 [2020-12-01 15:54:27,376 INFO L226 Difference]: Without dead ends: 78 [2020-12-01 15:54:27,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-01 15:54:27,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-01 15:54:27,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 45. [2020-12-01 15:54:27,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-01 15:54:27,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-12-01 15:54:27,398 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 16 [2020-12-01 15:54:27,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:54:27,398 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-12-01 15:54:27,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-01 15:54:27,398 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-12-01 15:54:27,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-01 15:54:27,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:54:27,400 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 15:54:27,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:54:27,630 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:54:27,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:54:27,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1311429602, now seen corresponding path program 1 times [2020-12-01 15:54:27,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:54:27,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876748388] [2020-12-01 15:54:27,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:54:27,642 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:54:27,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101494076] [2020-12-01 15:54:27,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/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 15:54:27,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:54:27,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-01 15:54:27,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:54:27,899 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 15:54:27,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876748388] [2020-12-01 15:54:27,900 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:54:27,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101494076] [2020-12-01 15:54:27,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:54:27,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-01 15:54:27,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386596417] [2020-12-01 15:54:27,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-01 15:54:27,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:54:27,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-01 15:54:27,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-01 15:54:27,904 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 8 states. [2020-12-01 15:54:28,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:54:28,079 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-12-01 15:54:28,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-01 15:54:28,079 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-12-01 15:54:28,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:54:28,080 INFO L225 Difference]: With dead ends: 64 [2020-12-01 15:54:28,081 INFO L226 Difference]: Without dead ends: 62 [2020-12-01 15:54:28,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-01 15:54:28,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-01 15:54:28,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2020-12-01 15:54:28,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-01 15:54:28,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-12-01 15:54:28,089 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 18 [2020-12-01 15:54:28,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:54:28,093 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-12-01 15:54:28,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-01 15:54:28,094 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-12-01 15:54:28,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-01 15:54:28,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:54:28,095 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:54:28,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:54:28,314 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:54:28,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:54:28,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1976639322, now seen corresponding path program 1 times [2020-12-01 15:54:28,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:54:28,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117607864] [2020-12-01 15:54:28,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:54:28,328 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:54:28,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147117368] [2020-12-01 15:54:28,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/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 15:54:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:54:28,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-01 15:54:28,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:54:28,456 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 15:54:28,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117607864] [2020-12-01 15:54:28,456 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:54:28,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147117368] [2020-12-01 15:54:28,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:54:28,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 15:54:28,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184877768] [2020-12-01 15:54:28,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-01 15:54:28,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:54:28,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-01 15:54:28,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-01 15:54:28,469 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 5 states. [2020-12-01 15:54:28,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:54:28,502 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2020-12-01 15:54:28,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-01 15:54:28,502 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-12-01 15:54:28,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:54:28,505 INFO L225 Difference]: With dead ends: 85 [2020-12-01 15:54:28,505 INFO L226 Difference]: Without dead ends: 55 [2020-12-01 15:54:28,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 15:54:28,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-01 15:54:28,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-12-01 15:54:28,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-01 15:54:28,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-12-01 15:54:28,529 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 20 [2020-12-01 15:54:28,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:54:28,530 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-12-01 15:54:28,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-01 15:54:28,530 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-12-01 15:54:28,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-01 15:54:28,531 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:54:28,531 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 15:54:28,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-01 15:54:28,746 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:54:28,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:54:28,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1858241727, now seen corresponding path program 1 times [2020-12-01 15:54:28,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:54:28,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579570075] [2020-12-01 15:54:28,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:54:28,767 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:54:28,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [504674267] [2020-12-01 15:54:28,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/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 15:54:28,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:54:28,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-01 15:54:28,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:54:28,933 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 15:54:28,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579570075] [2020-12-01 15:54:28,933 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:54:28,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504674267] [2020-12-01 15:54:28,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:54:28,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-01 15:54:28,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787916894] [2020-12-01 15:54:28,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-01 15:54:28,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:54:28,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-01 15:54:28,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-01 15:54:28,935 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 6 states. [2020-12-01 15:54:29,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:54:29,076 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2020-12-01 15:54:29,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-01 15:54:29,077 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-12-01 15:54:29,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:54:29,079 INFO L225 Difference]: With dead ends: 62 [2020-12-01 15:54:29,079 INFO L226 Difference]: Without dead ends: 60 [2020-12-01 15:54:29,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-01 15:54:29,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-01 15:54:29,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2020-12-01 15:54:29,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-01 15:54:29,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-12-01 15:54:29,093 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 20 [2020-12-01 15:54:29,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:54:29,094 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-12-01 15:54:29,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-01 15:54:29,094 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-12-01 15:54:29,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-01 15:54:29,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:54:29,095 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 15:54:29,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:54:29,322 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:54:29,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:54:29,322 INFO L82 PathProgramCache]: Analyzing trace with hash 936283940, now seen corresponding path program 1 times [2020-12-01 15:54:29,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:54:29,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373142339] [2020-12-01 15:54:29,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:54:29,337 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:54:29,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721161225] [2020-12-01 15:54:29,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/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 15:54:29,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:54:29,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-01 15:54:29,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:54:29,576 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 15:54:29,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373142339] [2020-12-01 15:54:29,577 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:54:29,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721161225] [2020-12-01 15:54:29,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:54:29,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-01 15:54:29,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419065964] [2020-12-01 15:54:29,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-01 15:54:29,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:54:29,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-01 15:54:29,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-01 15:54:29,582 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 7 states. [2020-12-01 15:54:31,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:54:31,792 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-12-01 15:54:31,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-01 15:54:31,793 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-12-01 15:54:31,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:54:31,793 INFO L225 Difference]: With dead ends: 67 [2020-12-01 15:54:31,794 INFO L226 Difference]: Without dead ends: 65 [2020-12-01 15:54:31,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-01 15:54:31,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-01 15:54:31,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2020-12-01 15:54:31,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-01 15:54:31,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-12-01 15:54:31,800 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 22 [2020-12-01 15:54:31,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:54:31,800 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-12-01 15:54:31,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-01 15:54:31,800 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-12-01 15:54:31,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-01 15:54:31,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:54:31,802 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, 1, 1, 1] [2020-12-01 15:54:32,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:54:32,002 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:54:32,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:54:32,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1931900048, now seen corresponding path program 1 times [2020-12-01 15:54:32,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:54:32,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724117695] [2020-12-01 15:54:32,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:54:32,014 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:54:32,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333957209] [2020-12-01 15:54:32,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/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 15:54:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:54:32,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-01 15:54:32,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:54:32,188 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 15:54:32,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724117695] [2020-12-01 15:54:32,188 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:54:32,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333957209] [2020-12-01 15:54:32,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:54:32,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-01 15:54:32,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196884778] [2020-12-01 15:54:32,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-01 15:54:32,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:54:32,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-01 15:54:32,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-01 15:54:32,197 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 6 states. [2020-12-01 15:54:32,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:54:32,384 INFO L93 Difference]: Finished difference Result 108 states and 123 transitions. [2020-12-01 15:54:32,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-01 15:54:32,385 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-12-01 15:54:32,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:54:32,388 INFO L225 Difference]: With dead ends: 108 [2020-12-01 15:54:32,388 INFO L226 Difference]: Without dead ends: 106 [2020-12-01 15:54:32,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:54:32,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-01 15:54:32,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2020-12-01 15:54:32,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-01 15:54:32,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2020-12-01 15:54:32,410 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 26 [2020-12-01 15:54:32,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:54:32,412 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2020-12-01 15:54:32,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-01 15:54:32,412 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2020-12-01 15:54:32,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-01 15:54:32,417 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:54:32,418 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-12-01 15:54:32,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-01 15:54:32,642 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:54:32,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:54:32,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1177713046, now seen corresponding path program 1 times [2020-12-01 15:54:32,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:54:32,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91729749] [2020-12-01 15:54:32,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:54:32,652 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:54:32,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910928952] [2020-12-01 15:54:32,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/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 15:54:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:54:32,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-01 15:54:32,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:54:32,801 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 15:54:32,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91729749] [2020-12-01 15:54:32,802 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:54:32,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910928952] [2020-12-01 15:54:32,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:54:32,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-01 15:54:32,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83170147] [2020-12-01 15:54:32,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-01 15:54:32,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:54:32,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-01 15:54:32,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-01 15:54:32,803 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand 6 states. [2020-12-01 15:54:32,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:54:32,853 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2020-12-01 15:54:32,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-01 15:54:32,854 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-12-01 15:54:32,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:54:32,855 INFO L225 Difference]: With dead ends: 89 [2020-12-01 15:54:32,855 INFO L226 Difference]: Without dead ends: 81 [2020-12-01 15:54:32,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 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 15:54:32,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-01 15:54:32,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-12-01 15:54:32,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-01 15:54:32,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2020-12-01 15:54:32,882 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 28 [2020-12-01 15:54:32,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:54:32,882 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2020-12-01 15:54:32,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-01 15:54:32,883 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2020-12-01 15:54:32,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-01 15:54:32,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:54:32,888 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, 1, 1, 1, 1, 1, 1] [2020-12-01 15:54:33,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:54:33,104 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:54:33,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:54:33,104 INFO L82 PathProgramCache]: Analyzing trace with hash 2145300502, now seen corresponding path program 1 times [2020-12-01 15:54:33,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:54:33,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132905380] [2020-12-01 15:54:33,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:54:33,114 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:54:33,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [421606614] [2020-12-01 15:54:33,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/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 15:54:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:54:33,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-01 15:54:33,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:54:33,275 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 15:54:33,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132905380] [2020-12-01 15:54:33,276 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:54:33,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421606614] [2020-12-01 15:54:33,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:54:33,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-01 15:54:33,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141012730] [2020-12-01 15:54:33,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-01 15:54:33,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:54:33,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-01 15:54:33,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-01 15:54:33,278 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand 7 states. [2020-12-01 15:54:33,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:54:33,538 INFO L93 Difference]: Finished difference Result 232 states and 266 transitions. [2020-12-01 15:54:33,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-01 15:54:33,539 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-12-01 15:54:33,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:54:33,541 INFO L225 Difference]: With dead ends: 232 [2020-12-01 15:54:33,541 INFO L226 Difference]: Without dead ends: 224 [2020-12-01 15:54:33,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 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 15:54:33,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-12-01 15:54:33,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 136. [2020-12-01 15:54:33,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-01 15:54:33,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 176 transitions. [2020-12-01 15:54:33,562 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 176 transitions. Word has length 29 [2020-12-01 15:54:33,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:54:33,564 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 176 transitions. [2020-12-01 15:54:33,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-01 15:54:33,564 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 176 transitions. [2020-12-01 15:54:33,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-01 15:54:33,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:54:33,566 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, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:54:33,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:54:33,794 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:54:33,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:54:33,794 INFO L82 PathProgramCache]: Analyzing trace with hash 345831055, now seen corresponding path program 1 times [2020-12-01 15:54:33,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:54:33,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274397461] [2020-12-01 15:54:33,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:54:33,809 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:54:33,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508305735] [2020-12-01 15:54:33,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/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 15:54:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:54:33,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-01 15:54:33,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:54:33,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:54:33,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274397461] [2020-12-01 15:54:33,966 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:54:33,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508305735] [2020-12-01 15:54:33,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:54:33,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-01 15:54:33,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440220614] [2020-12-01 15:54:33,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-01 15:54:33,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:54:33,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-01 15:54:33,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-01 15:54:33,968 INFO L87 Difference]: Start difference. First operand 136 states and 176 transitions. Second operand 6 states. [2020-12-01 15:54:34,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:54:34,014 INFO L93 Difference]: Finished difference Result 179 states and 228 transitions. [2020-12-01 15:54:34,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-01 15:54:34,015 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-12-01 15:54:34,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:54:34,016 INFO L225 Difference]: With dead ends: 179 [2020-12-01 15:54:34,016 INFO L226 Difference]: Without dead ends: 136 [2020-12-01 15:54:34,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-01 15:54:34,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-01 15:54:34,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-12-01 15:54:34,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-01 15:54:34,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 175 transitions. [2020-12-01 15:54:34,036 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 175 transitions. Word has length 30 [2020-12-01 15:54:34,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:54:34,037 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 175 transitions. [2020-12-01 15:54:34,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-01 15:54:34,037 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 175 transitions. [2020-12-01 15:54:34,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-01 15:54:34,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:54:34,040 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:54:34,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-01 15:54:34,262 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:54:34,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:54:34,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1388218666, now seen corresponding path program 1 times [2020-12-01 15:54:34,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:54:34,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589315690] [2020-12-01 15:54:34,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:54:34,272 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:54:34,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148905339] [2020-12-01 15:54:34,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/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 15:54:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:54:34,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-01 15:54:34,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:54:34,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:54:34,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589315690] [2020-12-01 15:54:34,584 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:54:34,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148905339] [2020-12-01 15:54:34,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:54:34,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-01 15:54:34,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235742406] [2020-12-01 15:54:34,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-01 15:54:34,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:54:34,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-01 15:54:34,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:54:34,587 INFO L87 Difference]: Start difference. First operand 136 states and 175 transitions. Second operand 10 states. [2020-12-01 15:54:34,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:54:34,859 INFO L93 Difference]: Finished difference Result 208 states and 267 transitions. [2020-12-01 15:54:34,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-01 15:54:34,859 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-12-01 15:54:34,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:54:34,861 INFO L225 Difference]: With dead ends: 208 [2020-12-01 15:54:34,861 INFO L226 Difference]: Without dead ends: 202 [2020-12-01 15:54:34,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-12-01 15:54:34,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-01 15:54:34,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 189. [2020-12-01 15:54:34,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-01 15:54:34,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 250 transitions. [2020-12-01 15:54:34,884 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 250 transitions. Word has length 32 [2020-12-01 15:54:34,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:54:34,884 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 250 transitions. [2020-12-01 15:54:34,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-01 15:54:34,885 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 250 transitions. [2020-12-01 15:54:34,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-01 15:54:34,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:54:34,885 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-01 15:54:35,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-01 15:54:35,106 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:54:35,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:54:35,106 INFO L82 PathProgramCache]: Analyzing trace with hash -2116589210, now seen corresponding path program 1 times [2020-12-01 15:54:35,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:54:35,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166768655] [2020-12-01 15:54:35,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:54:35,115 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:54:35,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1441285150] [2020-12-01 15:54:35,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/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 15:54:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:54:35,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-01 15:54:35,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:54:35,267 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 15:54:35,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166768655] [2020-12-01 15:54:35,268 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:54:35,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441285150] [2020-12-01 15:54:35,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:54:35,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-01 15:54:35,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453668854] [2020-12-01 15:54:35,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-01 15:54:35,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:54:35,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-01 15:54:35,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-01 15:54:35,269 INFO L87 Difference]: Start difference. First operand 189 states and 250 transitions. Second operand 7 states. [2020-12-01 15:54:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:54:35,338 INFO L93 Difference]: Finished difference Result 327 states and 437 transitions. [2020-12-01 15:54:35,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-01 15:54:35,338 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-12-01 15:54:35,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:54:35,340 INFO L225 Difference]: With dead ends: 327 [2020-12-01 15:54:35,340 INFO L226 Difference]: Without dead ends: 200 [2020-12-01 15:54:35,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-01 15:54:35,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-01 15:54:35,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2020-12-01 15:54:35,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-01 15:54:35,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 259 transitions. [2020-12-01 15:54:35,362 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 259 transitions. Word has length 34 [2020-12-01 15:54:35,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:54:35,362 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 259 transitions. [2020-12-01 15:54:35,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-01 15:54:35,362 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 259 transitions. [2020-12-01 15:54:35,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-01 15:54:35,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:54:35,362 INFO L422 BasicCegarLoop]: trace histogram [2, 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 15:54:35,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-01 15:54:35,586 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:54:35,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:54:35,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1656502963, now seen corresponding path program 1 times [2020-12-01 15:54:35,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:54:35,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16970476] [2020-12-01 15:54:35,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:54:35,594 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:54:35,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [950159263] [2020-12-01 15:54:35,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/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 15:54:35,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:54:35,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-01 15:54:35,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:54:35,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:54:35,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16970476] [2020-12-01 15:54:35,893 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:54:35,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950159263] [2020-12-01 15:54:35,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:54:35,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-01 15:54:35,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451407846] [2020-12-01 15:54:35,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-01 15:54:35,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:54:35,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-01 15:54:35,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:54:35,895 INFO L87 Difference]: Start difference. First operand 198 states and 259 transitions. Second operand 10 states. [2020-12-01 15:54:36,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:54:36,270 INFO L93 Difference]: Finished difference Result 208 states and 265 transitions. [2020-12-01 15:54:36,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-01 15:54:36,270 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-12-01 15:54:36,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:54:36,272 INFO L225 Difference]: With dead ends: 208 [2020-12-01 15:54:36,272 INFO L226 Difference]: Without dead ends: 206 [2020-12-01 15:54:36,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-12-01 15:54:36,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-12-01 15:54:36,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 198. [2020-12-01 15:54:36,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-01 15:54:36,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 257 transitions. [2020-12-01 15:54:36,301 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 257 transitions. Word has length 34 [2020-12-01 15:54:36,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:54:36,301 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 257 transitions. [2020-12-01 15:54:36,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-01 15:54:36,302 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 257 transitions. [2020-12-01 15:54:36,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-01 15:54:36,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:54:36,302 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:54:36,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:54:36,518 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:54:36,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:54:36,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1533707824, now seen corresponding path program 1 times [2020-12-01 15:54:36,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:54:36,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407340425] [2020-12-01 15:54:36,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:54:36,526 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:54:36,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781244606] [2020-12-01 15:54:36,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/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 15:54:36,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:54:36,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-01 15:54:36,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:54:37,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:54:37,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407340425] [2020-12-01 15:54:37,080 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:54:37,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781244606] [2020-12-01 15:54:37,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:54:37,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-01 15:54:37,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078747033] [2020-12-01 15:54:37,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-01 15:54:37,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:54:37,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-01 15:54:37,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-12-01 15:54:37,082 INFO L87 Difference]: Start difference. First operand 198 states and 257 transitions. Second operand 13 states. [2020-12-01 15:54:37,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:54:37,644 INFO L93 Difference]: Finished difference Result 225 states and 288 transitions. [2020-12-01 15:54:37,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-01 15:54:37,644 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-12-01 15:54:37,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:54:37,646 INFO L225 Difference]: With dead ends: 225 [2020-12-01 15:54:37,646 INFO L226 Difference]: Without dead ends: 223 [2020-12-01 15:54:37,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-12-01 15:54:37,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-12-01 15:54:37,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 198. [2020-12-01 15:54:37,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-01 15:54:37,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 255 transitions. [2020-12-01 15:54:37,668 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 255 transitions. Word has length 36 [2020-12-01 15:54:37,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:54:37,668 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 255 transitions. [2020-12-01 15:54:37,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-01 15:54:37,668 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 255 transitions. [2020-12-01 15:54:37,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-01 15:54:37,668 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:54:37,669 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:54:37,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-01 15:54:37,890 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:54:37,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:54:37,890 INFO L82 PathProgramCache]: Analyzing trace with hash -153983259, now seen corresponding path program 2 times [2020-12-01 15:54:37,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:54:37,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246934630] [2020-12-01 15:54:37,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:54:37,898 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:54:37,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1214273979] [2020-12-01 15:54:37,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/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 15:54:37,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:54:37,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:54:37,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-01 15:54:37,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:54:38,261 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:54:38,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246934630] [2020-12-01 15:54:38,261 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:54:38,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214273979] [2020-12-01 15:54:38,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:54:38,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-01 15:54:38,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038015697] [2020-12-01 15:54:38,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-01 15:54:38,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:54:38,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-01 15:54:38,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-12-01 15:54:38,266 INFO L87 Difference]: Start difference. First operand 198 states and 255 transitions. Second operand 12 states. [2020-12-01 15:54:38,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:54:38,702 INFO L93 Difference]: Finished difference Result 212 states and 269 transitions. [2020-12-01 15:54:38,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-01 15:54:38,703 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-12-01 15:54:38,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:54:38,704 INFO L225 Difference]: With dead ends: 212 [2020-12-01 15:54:38,704 INFO L226 Difference]: Without dead ends: 210 [2020-12-01 15:54:38,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2020-12-01 15:54:38,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-12-01 15:54:38,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 199. [2020-12-01 15:54:38,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-01 15:54:38,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 256 transitions. [2020-12-01 15:54:38,726 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 256 transitions. Word has length 36 [2020-12-01 15:54:38,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:54:38,726 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 256 transitions. [2020-12-01 15:54:38,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-01 15:54:38,726 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 256 transitions. [2020-12-01 15:54:38,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-01 15:54:38,727 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:54:38,727 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:54:38,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-01 15:54:38,946 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:54:38,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:54:38,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1996662625, now seen corresponding path program 1 times [2020-12-01 15:54:38,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:54:38,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601996972] [2020-12-01 15:54:38,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:54:38,954 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:54:38,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937818051] [2020-12-01 15:54:38,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/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 15:54:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:54:39,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-01 15:54:39,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:54:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:54:39,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601996972] [2020-12-01 15:54:39,070 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:54:39,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937818051] [2020-12-01 15:54:39,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:54:39,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-01 15:54:39,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847096839] [2020-12-01 15:54:39,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-01 15:54:39,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:54:39,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-01 15:54:39,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-01 15:54:39,074 INFO L87 Difference]: Start difference. First operand 199 states and 256 transitions. Second operand 7 states. [2020-12-01 15:54:39,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:54:39,135 INFO L93 Difference]: Finished difference Result 206 states and 263 transitions. [2020-12-01 15:54:39,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-01 15:54:39,136 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-12-01 15:54:39,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:54:39,138 INFO L225 Difference]: With dead ends: 206 [2020-12-01 15:54:39,138 INFO L226 Difference]: Without dead ends: 202 [2020-12-01 15:54:39,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-01 15:54:39,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-01 15:54:39,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2020-12-01 15:54:39,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-12-01 15:54:39,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 259 transitions. [2020-12-01 15:54:39,160 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 259 transitions. Word has length 38 [2020-12-01 15:54:39,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:54:39,160 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 259 transitions. [2020-12-01 15:54:39,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-01 15:54:39,161 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 259 transitions. [2020-12-01 15:54:39,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-01 15:54:39,161 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:54:39,161 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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 15:54:39,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-01 15:54:39,366 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:54:39,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:54:39,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1767299967, now seen corresponding path program 1 times [2020-12-01 15:54:39,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:54:39,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64497787] [2020-12-01 15:54:39,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:54:39,372 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:54:39,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423886943] [2020-12-01 15:54:39,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/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 15:54:39,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:54:39,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-01 15:54:39,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:54:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:54:39,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64497787] [2020-12-01 15:54:39,797 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:54:39,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423886943] [2020-12-01 15:54:39,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:54:39,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-01 15:54:39,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030045600] [2020-12-01 15:54:39,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-01 15:54:39,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:54:39,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-01 15:54:39,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-12-01 15:54:39,799 INFO L87 Difference]: Start difference. First operand 202 states and 259 transitions. Second operand 12 states. [2020-12-01 15:54:40,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:54:40,404 INFO L93 Difference]: Finished difference Result 239 states and 302 transitions. [2020-12-01 15:54:40,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-01 15:54:40,405 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-12-01 15:54:40,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:54:40,407 INFO L225 Difference]: With dead ends: 239 [2020-12-01 15:54:40,407 INFO L226 Difference]: Without dead ends: 233 [2020-12-01 15:54:40,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2020-12-01 15:54:40,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-12-01 15:54:40,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2020-12-01 15:54:40,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-12-01 15:54:40,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 291 transitions. [2020-12-01 15:54:40,429 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 291 transitions. Word has length 39 [2020-12-01 15:54:40,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:54:40,429 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 291 transitions. [2020-12-01 15:54:40,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-01 15:54:40,429 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 291 transitions. [2020-12-01 15:54:40,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-01 15:54:40,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:54:40,430 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:54:40,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:54:40,658 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:54:40,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:54:40,658 INFO L82 PathProgramCache]: Analyzing trace with hash 455017590, now seen corresponding path program 2 times [2020-12-01 15:54:40,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:54:40,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915660144] [2020-12-01 15:54:40,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:54:40,665 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:54:40,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197919023] [2020-12-01 15:54:40,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/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 15:54:40,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:54:40,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:54:40,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-01 15:54:40,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:54:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:54:40,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915660144] [2020-12-01 15:54:40,823 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:54:40,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197919023] [2020-12-01 15:54:40,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:54:40,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-01 15:54:40,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963810244] [2020-12-01 15:54:40,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-01 15:54:40,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:54:40,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-01 15:54:40,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-01 15:54:40,825 INFO L87 Difference]: Start difference. First operand 226 states and 291 transitions. Second operand 8 states. [2020-12-01 15:54:40,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:54:40,919 INFO L93 Difference]: Finished difference Result 250 states and 317 transitions. [2020-12-01 15:54:40,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-01 15:54:40,920 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-12-01 15:54:40,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:54:40,922 INFO L225 Difference]: With dead ends: 250 [2020-12-01 15:54:40,922 INFO L226 Difference]: Without dead ends: 240 [2020-12-01 15:54:40,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-12-01 15:54:40,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-12-01 15:54:40,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2020-12-01 15:54:40,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-12-01 15:54:40,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 305 transitions. [2020-12-01 15:54:40,945 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 305 transitions. Word has length 42 [2020-12-01 15:54:40,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:54:40,945 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 305 transitions. [2020-12-01 15:54:40,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-01 15:54:40,945 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 305 transitions. [2020-12-01 15:54:40,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-01 15:54:40,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:54:40,946 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 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 15:54:41,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:54:41,174 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:54:41,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:54:41,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1736909211, now seen corresponding path program 1 times [2020-12-01 15:54:41,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:54:41,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097919554] [2020-12-01 15:54:41,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:54:41,180 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:54:41,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [549302556] [2020-12-01 15:54:41,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/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 15:54:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:54:41,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-01 15:54:41,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:54:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:54:41,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097919554] [2020-12-01 15:54:41,328 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:54:41,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549302556] [2020-12-01 15:54:41,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:54:41,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-01 15:54:41,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956325516] [2020-12-01 15:54:41,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-01 15:54:41,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:54:41,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-01 15:54:41,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-01 15:54:41,330 INFO L87 Difference]: Start difference. First operand 239 states and 305 transitions. Second operand 8 states. [2020-12-01 15:54:41,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:54:41,412 INFO L93 Difference]: Finished difference Result 368 states and 482 transitions. [2020-12-01 15:54:41,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-01 15:54:41,413 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-12-01 15:54:41,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:54:41,414 INFO L225 Difference]: With dead ends: 368 [2020-12-01 15:54:41,415 INFO L226 Difference]: Without dead ends: 241 [2020-12-01 15:54:41,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-12-01 15:54:41,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-12-01 15:54:41,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2020-12-01 15:54:41,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-12-01 15:54:41,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 305 transitions. [2020-12-01 15:54:41,440 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 305 transitions. Word has length 44 [2020-12-01 15:54:41,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:54:41,441 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 305 transitions. [2020-12-01 15:54:41,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-01 15:54:41,441 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 305 transitions. [2020-12-01 15:54:41,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-01 15:54:41,441 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:54:41,442 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:54:41,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-01 15:54:41,658 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:54:41,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:54:41,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1815469770, now seen corresponding path program 2 times [2020-12-01 15:54:41,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:54:41,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495147393] [2020-12-01 15:54:41,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:54:41,664 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:54:41,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772968545] [2020-12-01 15:54:41,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/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 15:54:41,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:54:41,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:54:41,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-01 15:54:41,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:54:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:54:41,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495147393] [2020-12-01 15:54:41,867 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:54:41,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772968545] [2020-12-01 15:54:41,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:54:41,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-01 15:54:41,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59462279] [2020-12-01 15:54:41,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-01 15:54:41,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:54:41,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-01 15:54:41,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-01 15:54:41,868 INFO L87 Difference]: Start difference. First operand 241 states and 305 transitions. Second operand 9 states. [2020-12-01 15:54:41,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:54:41,937 INFO L93 Difference]: Finished difference Result 304 states and 383 transitions. [2020-12-01 15:54:41,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-01 15:54:41,938 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-12-01 15:54:41,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:54:41,939 INFO L225 Difference]: With dead ends: 304 [2020-12-01 15:54:41,939 INFO L226 Difference]: Without dead ends: 146 [2020-12-01 15:54:41,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:54:41,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-01 15:54:41,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2020-12-01 15:54:41,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-12-01 15:54:41,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2020-12-01 15:54:41,957 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 46 [2020-12-01 15:54:41,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:54:41,957 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2020-12-01 15:54:41,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-01 15:54:41,958 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2020-12-01 15:54:41,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-01 15:54:41,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:54:41,959 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:54:42,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-01 15:54:42,170 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:54:42,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:54:42,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1624462181, now seen corresponding path program 1 times [2020-12-01 15:54:42,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:54:42,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487867162] [2020-12-01 15:54:42,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:54:42,177 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:54:42,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2017820039] [2020-12-01 15:54:42,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:54:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:54:42,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-01 15:54:42,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:54:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:54:42,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487867162] [2020-12-01 15:54:42,903 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:54:42,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017820039] [2020-12-01 15:54:42,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:54:42,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-01 15:54:42,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310612878] [2020-12-01 15:54:42,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-01 15:54:42,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:54:42,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-01 15:54:42,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-12-01 15:54:42,905 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand 13 states. [2020-12-01 15:54:55,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:54:55,766 INFO L93 Difference]: Finished difference Result 144 states and 158 transitions. [2020-12-01 15:54:55,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-01 15:54:55,767 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-12-01 15:54:55,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:54:55,768 INFO L225 Difference]: With dead ends: 144 [2020-12-01 15:54:55,768 INFO L226 Difference]: Without dead ends: 142 [2020-12-01 15:54:55,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-12-01 15:54:55,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-01 15:54:55,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2020-12-01 15:54:55,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-01 15:54:55,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 152 transitions. [2020-12-01 15:54:55,784 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 152 transitions. Word has length 46 [2020-12-01 15:54:55,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:54:55,784 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 152 transitions. [2020-12-01 15:54:55,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-01 15:54:55,784 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 152 transitions. [2020-12-01 15:54:55,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-01 15:54:55,785 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:54:55,785 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:54:55,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:54:55,986 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:54:55,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:54:55,986 INFO L82 PathProgramCache]: Analyzing trace with hash -63228902, now seen corresponding path program 3 times [2020-12-01 15:54:55,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:54:55,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823495460] [2020-12-01 15:54:55,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:54:56,001 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:54:56,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825410196] [2020-12-01 15:54:56,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:54:56,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-01 15:54:56,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:54:56,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-01 15:54:56,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:54:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-01 15:54:56,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823495460] [2020-12-01 15:54:56,369 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:54:56,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825410196] [2020-12-01 15:54:56,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:54:56,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-01 15:54:56,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782995178] [2020-12-01 15:54:56,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-01 15:54:56,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:54:56,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-01 15:54:56,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-01 15:54:56,371 INFO L87 Difference]: Start difference. First operand 138 states and 152 transitions. Second operand 11 states. [2020-12-01 15:54:58,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:54:58,625 INFO L93 Difference]: Finished difference Result 150 states and 168 transitions. [2020-12-01 15:54:58,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-01 15:54:58,626 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-12-01 15:54:58,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:54:58,627 INFO L225 Difference]: With dead ends: 150 [2020-12-01 15:54:58,627 INFO L226 Difference]: Without dead ends: 148 [2020-12-01 15:54:58,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-01 15:54:58,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-12-01 15:54:58,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 136. [2020-12-01 15:54:58,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-01 15:54:58,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 150 transitions. [2020-12-01 15:54:58,643 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 150 transitions. Word has length 46 [2020-12-01 15:54:58,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:54:58,643 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 150 transitions. [2020-12-01 15:54:58,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-01 15:54:58,643 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 150 transitions. [2020-12-01 15:54:58,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-01 15:54:58,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:54:58,644 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:54:58,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-01 15:54:58,866 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:54:58,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:54:58,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1369624974, now seen corresponding path program 2 times [2020-12-01 15:54:58,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:54:58,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107201429] [2020-12-01 15:54:58,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:54:58,873 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:54:58,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [261329238] [2020-12-01 15:54:58,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:54:58,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:54:58,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:54:58,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-01 15:54:58,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:54:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-01 15:54:59,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107201429] [2020-12-01 15:54:59,023 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:54:59,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261329238] [2020-12-01 15:54:59,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:54:59,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-01 15:54:59,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11302] [2020-12-01 15:54:59,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-01 15:54:59,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:54:59,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-01 15:54:59,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-01 15:54:59,025 INFO L87 Difference]: Start difference. First operand 136 states and 150 transitions. Second operand 5 states. [2020-12-01 15:54:59,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:54:59,147 INFO L93 Difference]: Finished difference Result 180 states and 198 transitions. [2020-12-01 15:54:59,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-01 15:54:59,148 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-12-01 15:54:59,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:54:59,149 INFO L225 Difference]: With dead ends: 180 [2020-12-01 15:54:59,149 INFO L226 Difference]: Without dead ends: 157 [2020-12-01 15:54:59,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 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 15:54:59,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-01 15:54:59,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 127. [2020-12-01 15:54:59,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-01 15:54:59,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 138 transitions. [2020-12-01 15:54:59,165 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 138 transitions. Word has length 48 [2020-12-01 15:54:59,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:54:59,166 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 138 transitions. [2020-12-01 15:54:59,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-01 15:54:59,166 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 138 transitions. [2020-12-01 15:54:59,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-01 15:54:59,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:54:59,167 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:54:59,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:54:59,394 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:54:59,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:54:59,394 INFO L82 PathProgramCache]: Analyzing trace with hash 361320236, now seen corresponding path program 2 times [2020-12-01 15:54:59,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:54:59,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975897962] [2020-12-01 15:54:59,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:54:59,400 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:54:59,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915932822] [2020-12-01 15:54:59,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/bin/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:54:59,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:54:59,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:54:59,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-01 15:54:59,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:54:59,802 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:54:59,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975897962] [2020-12-01 15:54:59,803 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 15:54:59,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915932822] [2020-12-01 15:54:59,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:54:59,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-01 15:54:59,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142044192] [2020-12-01 15:54:59,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-01 15:54:59,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:54:59,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-01 15:54:59,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-12-01 15:54:59,805 INFO L87 Difference]: Start difference. First operand 127 states and 138 transitions. Second operand 13 states. [2020-12-01 15:55:00,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:55:00,673 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2020-12-01 15:55:00,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-01 15:55:00,673 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-12-01 15:55:00,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:55:00,674 INFO L225 Difference]: With dead ends: 135 [2020-12-01 15:55:00,675 INFO L226 Difference]: Without dead ends: 131 [2020-12-01 15:55:00,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-12-01 15:55:00,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-01 15:55:00,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2020-12-01 15:55:00,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-01 15:55:00,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 139 transitions. [2020-12-01 15:55:00,690 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 139 transitions. Word has length 49 [2020-12-01 15:55:00,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:55:00,690 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 139 transitions. [2020-12-01 15:55:00,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-01 15:55:00,690 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 139 transitions. [2020-12-01 15:55:00,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-01 15:55:00,691 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:55:00,691 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:55:00,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-01 15:55:00,918 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:55:00,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:55:00,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1010714709, now seen corresponding path program 2 times [2020-12-01 15:55:00,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:55:00,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001886164] [2020-12-01 15:55:00,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:55:00,925 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:55:00,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388214467] [2020-12-01 15:55:00,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/bin/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:55:01,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:55:01,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-12-01 15:55:01,016 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:55:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:55:01,054 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:55:01,160 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:55:01,160 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-01 15:55:01,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-01 15:55:01,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 03:55:01 BoogieIcfgContainer [2020-12-01 15:55:01,448 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 15:55:01,448 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 15:55:01,448 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 15:55:01,449 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 15:55:01,449 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:54:25" (3/4) ... [2020-12-01 15:55:01,451 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-01 15:55:01,517 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c0ad23a1-033f-4f84-ac93-fffbe51c7334/bin/uautomizer/witness.graphml [2020-12-01 15:55:01,517 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 15:55:01,519 INFO L168 Benchmark]: Toolchain (without parser) took 36957.37 ms. Allocated memory was 102.8 MB in the beginning and 186.6 MB in the end (delta: 83.9 MB). Free memory was 74.3 MB in the beginning and 81.1 MB in the end (delta: -6.8 MB). Peak memory consumption was 75.6 MB. Max. memory is 16.1 GB. [2020-12-01 15:55:01,527 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 81.8 MB. Free memory is still 48.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:55:01,527 INFO L168 Benchmark]: CACSL2BoogieTranslator took 369.68 ms. Allocated memory is still 102.8 MB. Free memory was 74.1 MB in the beginning and 79.0 MB in the end (delta: -4.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-01 15:55:01,528 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.65 ms. Allocated memory is still 102.8 MB. Free memory was 79.0 MB in the beginning and 77.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:55:01,528 INFO L168 Benchmark]: Boogie Preprocessor took 38.14 ms. Allocated memory is still 102.8 MB. Free memory was 77.2 MB in the beginning and 75.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:55:01,529 INFO L168 Benchmark]: RCFGBuilder took 444.07 ms. Allocated memory is still 102.8 MB. Free memory was 75.9 MB in the beginning and 58.3 MB in the end (delta: 17.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-12-01 15:55:01,529 INFO L168 Benchmark]: TraceAbstraction took 35979.00 ms. Allocated memory was 102.8 MB in the beginning and 186.6 MB in the end (delta: 83.9 MB). Free memory was 57.7 MB in the beginning and 85.2 MB in the end (delta: -27.5 MB). Peak memory consumption was 58.3 MB. Max. memory is 16.1 GB. [2020-12-01 15:55:01,529 INFO L168 Benchmark]: Witness Printer took 69.28 ms. Allocated memory is still 186.6 MB. Free memory was 85.2 MB in the beginning and 81.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-01 15:55:01,532 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 81.8 MB. Free memory is still 48.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 369.68 ms. Allocated memory is still 102.8 MB. Free memory was 74.1 MB in the beginning and 79.0 MB in the end (delta: -4.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.65 ms. Allocated memory is still 102.8 MB. Free memory was 79.0 MB in the beginning and 77.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.14 ms. Allocated memory is still 102.8 MB. Free memory was 77.2 MB in the beginning and 75.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 444.07 ms. Allocated memory is still 102.8 MB. Free memory was 75.9 MB in the beginning and 58.3 MB in the end (delta: 17.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 35979.00 ms. Allocated memory was 102.8 MB in the beginning and 186.6 MB in the end (delta: 83.9 MB). Free memory was 57.7 MB in the beginning and 85.2 MB in the end (delta: -27.5 MB). Peak memory consumption was 58.3 MB. Max. memory is 16.1 GB. * Witness Printer took 69.28 ms. Allocated memory is still 186.6 MB. Free memory was 85.2 MB in the beginning and 81.1 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, c, k, xy, yy; [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 [L33] c = 0 [L34] k = 0 [L35] xy = (long long) x * y [L36] yy = (long long) y * y [L8] COND FALSE !(!cond) VAL [counter=0] [L8] COND FALSE !(!cond) VAL [counter=0] [L40] EXPR counter++ VAL [counter=1] [L40] COND TRUE counter++<5 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [counter=1] [L46] EXPR counter++ VAL [counter=2] [L46] COND TRUE counter++<5 [L11] COND FALSE !(!(cond)) VAL [counter=2] [L11] COND FALSE !(!(cond)) VAL [counter=2] [L11] COND FALSE !(!(cond)) VAL [counter=2] [L11] COND FALSE !(!(cond)) VAL [counter=2] [L51] COND TRUE !(c >= b) VAL [counter=2] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [counter=2] [L40] EXPR counter++ VAL [counter=3] [L40] COND TRUE counter++<5 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [counter=3] [L46] EXPR counter++ VAL [counter=4] [L46] COND TRUE counter++<5 [L11] COND FALSE !(!(cond)) VAL [counter=4] [L11] COND FALSE !(!(cond)) VAL [counter=4] [L11] COND FALSE !(!(cond)) VAL [counter=4] [L11] COND FALSE !(!(cond)) VAL [counter=4] [L51] COND FALSE !(!(c >= b)) [L53] c = c - b [L54] k = k + 1 VAL [counter=4] [L46] EXPR counter++ VAL [counter=5] [L46] 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] [L51] COND TRUE !(c >= b) VAL [counter=5] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [counter=5] [L40] EXPR counter++ VAL [counter=6] [L40] COND FALSE !(counter++<5) [L11] COND TRUE !(cond) VAL [counter=6] [L4] __assert_fail("0", "egcd2-ll.c", 4, "reach_error") VAL [counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 43 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 35.8s, OverallIterations: 27, TraceHistogramMax: 4, AutomataDifference: 22.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 996 SDtfs, 2026 SDslu, 3074 SDs, 0 SdLazy, 2464 SolverSat, 306 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 18.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 878 GetRequests, 631 SyntacticMatches, 1 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 4.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=241occurred in iteration=21, 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, 26 MinimizatonAttempts, 312 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 873 NumberOfCodeBlocks, 853 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 795 ConstructedInterpolants, 0 QuantifiedInterpolants, 297782 SizeOfPredicates, 214 NumberOfNonLiveVariables, 3858 ConjunctsInSsa, 575 ConjunctsInUnsatCore, 26 InterpolantComputations, 9 PerfectInterpolantSequences, 100/300 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...