./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/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-a4ecdab [2020-11-29 23:55:18,147 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 23:55:18,149 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 23:55:18,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 23:55:18,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 23:55:18,235 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 23:55:18,237 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 23:55:18,249 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 23:55:18,251 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 23:55:18,252 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 23:55:18,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 23:55:18,258 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 23:55:18,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 23:55:18,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 23:55:18,268 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 23:55:18,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 23:55:18,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 23:55:18,271 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 23:55:18,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 23:55:18,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 23:55:18,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 23:55:18,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 23:55:18,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 23:55:18,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 23:55:18,301 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 23:55:18,301 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 23:55:18,302 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 23:55:18,304 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 23:55:18,305 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 23:55:18,306 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 23:55:18,307 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 23:55:18,308 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 23:55:18,310 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 23:55:18,311 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 23:55:18,312 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 23:55:18,312 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 23:55:18,313 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 23:55:18,313 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 23:55:18,314 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 23:55:18,315 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 23:55:18,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 23:55:18,318 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 23:55:18,363 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 23:55:18,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 23:55:18,365 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 23:55:18,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 23:55:18,366 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 23:55:18,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 23:55:18,366 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 23:55:18,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 23:55:18,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 23:55:18,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 23:55:18,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 23:55:18,368 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 23:55:18,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 23:55:18,369 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 23:55:18,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 23:55:18,369 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 23:55:18,369 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 23:55:18,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 23:55:18,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 23:55:18,370 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 23:55:18,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 23:55:18,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:55:18,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 23:55:18,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 23:55:18,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 23:55:18,372 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 23:55:18,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 23:55:18,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 23:55:18,372 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 23:55:18,373 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_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39bcfd9082233c69fe35086fe400d50c1cc05bc1 [2020-11-29 23:55:18,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 23:55:18,723 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 23:55:18,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 23:55:18,726 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 23:55:18,727 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 23:55:18,727 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound5.c [2020-11-29 23:55:18,798 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/data/7fc4863e4/3bb03e5df09141999c62e36e1d14260c/FLAGe011af41c [2020-11-29 23:55:19,335 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 23:55:19,338 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound5.c [2020-11-29 23:55:19,351 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/data/7fc4863e4/3bb03e5df09141999c62e36e1d14260c/FLAGe011af41c [2020-11-29 23:55:19,680 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/data/7fc4863e4/3bb03e5df09141999c62e36e1d14260c [2020-11-29 23:55:19,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 23:55:19,684 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 23:55:19,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 23:55:19,686 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 23:55:19,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 23:55:19,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:55:19" (1/1) ... [2020-11-29 23:55:19,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c52234c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:19, skipping insertion in model container [2020-11-29 23:55:19,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:55:19" (1/1) ... [2020-11-29 23:55:19,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 23:55:19,718 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 23:55:19,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:55:19,936 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 23:55:19,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:55:19,975 INFO L208 MainTranslator]: Completed translation [2020-11-29 23:55:19,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:19 WrapperNode [2020-11-29 23:55:19,976 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 23:55:19,977 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 23:55:19,977 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 23:55:19,977 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 23:55:19,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:19" (1/1) ... [2020-11-29 23:55:19,992 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:19" (1/1) ... [2020-11-29 23:55:20,016 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 23:55:20,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 23:55:20,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 23:55:20,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 23:55:20,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:19" (1/1) ... [2020-11-29 23:55:20,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:19" (1/1) ... [2020-11-29 23:55:20,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:19" (1/1) ... [2020-11-29 23:55:20,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:19" (1/1) ... [2020-11-29 23:55:20,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:19" (1/1) ... [2020-11-29 23:55:20,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:19" (1/1) ... [2020-11-29 23:55:20,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:19" (1/1) ... [2020-11-29 23:55:20,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 23:55:20,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 23:55:20,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 23:55:20,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 23:55:20,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:55:20,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 23:55:20,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 23:55:20,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 23:55:20,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 23:55:20,697 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 23:55:20,697 INFO L298 CfgBuilder]: Removed 38 assume(true) statements. [2020-11-29 23:55:20,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:55:20 BoogieIcfgContainer [2020-11-29 23:55:20,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 23:55:20,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 23:55:20,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 23:55:20,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 23:55:20,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 11:55:19" (1/3) ... [2020-11-29 23:55:20,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dea28f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:55:20, skipping insertion in model container [2020-11-29 23:55:20,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:19" (2/3) ... [2020-11-29 23:55:20,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dea28f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:55:20, skipping insertion in model container [2020-11-29 23:55:20,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:55:20" (3/3) ... [2020-11-29 23:55:20,710 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound5.c [2020-11-29 23:55:20,723 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 23:55:20,728 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-11-29 23:55:20,737 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-11-29 23:55:20,763 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 23:55:20,763 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 23:55:20,763 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 23:55:20,763 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 23:55:20,763 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 23:55:20,764 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 23:55:20,764 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 23:55:20,764 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 23:55:20,779 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-11-29 23:55:20,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 23:55:20,784 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:20,785 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:20,785 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:55:20,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:20,791 INFO L82 PathProgramCache]: Analyzing trace with hash -141659761, now seen corresponding path program 1 times [2020-11-29 23:55:20,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:20,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962601612] [2020-11-29 23:55:20,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:20,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962601612] [2020-11-29 23:55:20,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:55:20,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 23:55:20,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438141166] [2020-11-29 23:55:20,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 23:55:20,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:20,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 23:55:20,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 23:55:20,960 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2020-11-29 23:55:20,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:20,980 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2020-11-29 23:55:20,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 23:55:20,982 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-11-29 23:55:20,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:20,991 INFO L225 Difference]: With dead ends: 83 [2020-11-29 23:55:20,991 INFO L226 Difference]: Without dead ends: 39 [2020-11-29 23:55:20,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 23:55:21,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-29 23:55:21,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-11-29 23:55:21,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-29 23:55:21,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-11-29 23:55:21,028 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 13 [2020-11-29 23:55:21,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:21,029 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-11-29 23:55:21,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 23:55:21,029 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-11-29 23:55:21,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 23:55:21,030 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:21,030 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:21,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 23:55:21,030 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:55:21,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:21,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1057766562, now seen corresponding path program 1 times [2020-11-29 23:55:21,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:21,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685944047] [2020-11-29 23:55:21,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:21,050 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:21,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829394804] [2020-11-29 23:55:21,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:21,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 23:55:21,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:21,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:21,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685944047] [2020-11-29 23:55:21,206 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:21,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829394804] [2020-11-29 23:55:21,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:55:21,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:55:21,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773457369] [2020-11-29 23:55:21,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:55:21,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:21,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:55:21,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:55:21,209 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 4 states. [2020-11-29 23:55:21,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:21,244 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-11-29 23:55:21,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:55:21,245 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-29 23:55:21,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:21,246 INFO L225 Difference]: With dead ends: 49 [2020-11-29 23:55:21,246 INFO L226 Difference]: Without dead ends: 41 [2020-11-29 23:55:21,247 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 [2020-11-29 23:55:21,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-29 23:55:21,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-11-29 23:55:21,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-29 23:55:21,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-11-29 23:55:21,254 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 14 [2020-11-29 23:55:21,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:21,255 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-11-29 23:55:21,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:55:21,255 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-11-29 23:55:21,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 23:55:21,256 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:21,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:21,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-29 23:55:21,471 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:55:21,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:21,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1568674210, now seen corresponding path program 1 times [2020-11-29 23:55:21,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:21,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164860488] [2020-11-29 23:55:21,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:21,490 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:21,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432933513] [2020-11-29 23:55:21,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:21,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 23:55:21,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:21,595 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:55:21,597 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:55:21,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:21,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164860488] [2020-11-29 23:55:21,628 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:21,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432933513] [2020-11-29 23:55:21,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:55:21,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 23:55:21,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574881666] [2020-11-29 23:55:21,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:55:21,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:21,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:55:21,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:55:21,631 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 5 states. [2020-11-29 23:55:21,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:21,830 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2020-11-29 23:55:21,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 23:55:21,831 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-11-29 23:55:21,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:21,833 INFO L225 Difference]: With dead ends: 69 [2020-11-29 23:55:21,833 INFO L226 Difference]: Without dead ends: 61 [2020-11-29 23:55:21,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:55:21,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-29 23:55:21,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2020-11-29 23:55:21,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-29 23:55:21,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-11-29 23:55:21,841 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 15 [2020-11-29 23:55:21,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:21,841 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-11-29 23:55:21,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:55:21,841 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-11-29 23:55:21,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 23:55:21,842 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:21,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:22,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:22,052 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:55:22,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:22,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1384108475, now seen corresponding path program 1 times [2020-11-29 23:55:22,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:22,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093121401] [2020-11-29 23:55:22,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:22,079 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:22,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596240539] [2020-11-29 23:55:22,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:22,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:22,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 23:55:22,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:22,186 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:55:22,186 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:55:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:22,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093121401] [2020-11-29 23:55:22,255 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:22,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596240539] [2020-11-29 23:55:22,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:55:22,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-29 23:55:22,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402014340] [2020-11-29 23:55:22,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 23:55:22,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:22,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 23:55:22,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:55:22,257 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 7 states. [2020-11-29 23:55:22,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:22,567 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2020-11-29 23:55:22,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 23:55:22,568 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-11-29 23:55:22,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:22,569 INFO L225 Difference]: With dead ends: 80 [2020-11-29 23:55:22,569 INFO L226 Difference]: Without dead ends: 78 [2020-11-29 23:55:22,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-11-29 23:55:22,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-29 23:55:22,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 45. [2020-11-29 23:55:22,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-29 23:55:22,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-11-29 23:55:22,577 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 16 [2020-11-29 23:55:22,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:22,578 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-11-29 23:55:22,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 23:55:22,578 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-11-29 23:55:22,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 23:55:22,579 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:22,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:22,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:22,815 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:55:22,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:22,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1311429602, now seen corresponding path program 1 times [2020-11-29 23:55:22,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:22,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448874415] [2020-11-29 23:55:22,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:22,829 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:22,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1537514390] [2020-11-29 23:55:22,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:22,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:22,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 23:55:22,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:22,923 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:55:22,924 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:55:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:22,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448874415] [2020-11-29 23:55:22,969 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:22,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537514390] [2020-11-29 23:55:22,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:55:22,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 23:55:22,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028590322] [2020-11-29 23:55:22,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 23:55:22,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:22,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 23:55:22,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:55:22,971 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 6 states. [2020-11-29 23:55:23,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:23,169 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-11-29 23:55:23,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 23:55:23,172 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-11-29 23:55:23,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:23,173 INFO L225 Difference]: With dead ends: 64 [2020-11-29 23:55:23,173 INFO L226 Difference]: Without dead ends: 62 [2020-11-29 23:55:23,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-29 23:55:23,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-29 23:55:23,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2020-11-29 23:55:23,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-29 23:55:23,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-11-29 23:55:23,187 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 18 [2020-11-29 23:55:23,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:23,188 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-11-29 23:55:23,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 23:55:23,188 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-11-29 23:55:23,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 23:55:23,189 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:23,189 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:23,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:23,415 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:55:23,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:23,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1976639322, now seen corresponding path program 1 times [2020-11-29 23:55:23,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:23,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239099766] [2020-11-29 23:55:23,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:23,433 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:23,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1141625830] [2020-11-29 23:55:23,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:23,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 23:55:23,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:23,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239099766] [2020-11-29 23:55:23,556 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:23,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141625830] [2020-11-29 23:55:23,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:55:23,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:55:23,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678011110] [2020-11-29 23:55:23,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:55:23,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:23,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:55:23,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:55:23,558 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 5 states. [2020-11-29 23:55:23,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:23,589 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2020-11-29 23:55:23,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 23:55:23,591 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-11-29 23:55:23,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:23,593 INFO L225 Difference]: With dead ends: 85 [2020-11-29 23:55:23,593 INFO L226 Difference]: Without dead ends: 55 [2020-11-29 23:55:23,593 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 [2020-11-29 23:55:23,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-29 23:55:23,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-11-29 23:55:23,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-29 23:55:23,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-11-29 23:55:23,612 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 20 [2020-11-29 23:55:23,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:23,613 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-11-29 23:55:23,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:55:23,613 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-11-29 23:55:23,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 23:55:23,614 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:23,615 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] [2020-11-29 23:55:23,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-29 23:55:23,839 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:55:23,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:23,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1858241727, now seen corresponding path program 1 times [2020-11-29 23:55:23,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:23,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144861343] [2020-11-29 23:55:23,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:23,850 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:23,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495070489] [2020-11-29 23:55:23,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:23,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 23:55:23,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:23,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144861343] [2020-11-29 23:55:23,976 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:23,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495070489] [2020-11-29 23:55:23,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:55:23,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:55:23,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717584284] [2020-11-29 23:55:23,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:55:23,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:23,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:55:23,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:55:23,978 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 4 states. [2020-11-29 23:55:24,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:24,086 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2020-11-29 23:55:24,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:55:24,087 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-29 23:55:24,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:24,088 INFO L225 Difference]: With dead ends: 62 [2020-11-29 23:55:24,088 INFO L226 Difference]: Without dead ends: 60 [2020-11-29 23:55:24,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:55:24,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-29 23:55:24,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2020-11-29 23:55:24,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-29 23:55:24,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-11-29 23:55:24,103 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 20 [2020-11-29 23:55:24,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:24,104 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-11-29 23:55:24,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:55:24,104 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-11-29 23:55:24,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 23:55:24,104 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:24,105 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] [2020-11-29 23:55:24,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:24,330 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:55:24,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:24,331 INFO L82 PathProgramCache]: Analyzing trace with hash 936283940, now seen corresponding path program 1 times [2020-11-29 23:55:24,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:24,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055048065] [2020-11-29 23:55:24,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:24,342 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:24,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912853486] [2020-11-29 23:55:24,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:24,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:24,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 23:55:24,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:24,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:24,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055048065] [2020-11-29 23:55:24,512 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:24,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912853486] [2020-11-29 23:55:24,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:55:24,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 23:55:24,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090562067] [2020-11-29 23:55:24,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:55:24,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:24,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:55:24,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:55:24,514 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 5 states. [2020-11-29 23:55:24,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:24,653 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-11-29 23:55:24,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 23:55:24,653 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-11-29 23:55:24,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:24,654 INFO L225 Difference]: With dead ends: 67 [2020-11-29 23:55:24,654 INFO L226 Difference]: Without dead ends: 65 [2020-11-29 23:55:24,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:55:24,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-29 23:55:24,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2020-11-29 23:55:24,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-29 23:55:24,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-11-29 23:55:24,663 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 22 [2020-11-29 23:55:24,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:24,663 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-11-29 23:55:24,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:55:24,663 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-11-29 23:55:24,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 23:55:24,664 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:24,665 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] [2020-11-29 23:55:24,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:24,890 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]=== [2020-11-29 23:55:24,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:24,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1931900048, now seen corresponding path program 1 times [2020-11-29 23:55:24,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:24,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861322407] [2020-11-29 23:55:24,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:24,901 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:24,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1936474449] [2020-11-29 23:55:24,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:24,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-29 23:55:24,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:24,996 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:55:24,996 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:55:25,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:25,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861322407] [2020-11-29 23:55:25,097 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:25,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936474449] [2020-11-29 23:55:25,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:55:25,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-29 23:55:25,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062186234] [2020-11-29 23:55:25,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 23:55:25,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:25,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 23:55:25,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-29 23:55:25,098 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 8 states. [2020-11-29 23:55:25,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:25,449 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2020-11-29 23:55:25,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 23:55:25,451 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-11-29 23:55:25,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:25,452 INFO L225 Difference]: With dead ends: 79 [2020-11-29 23:55:25,452 INFO L226 Difference]: Without dead ends: 77 [2020-11-29 23:55:25,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-11-29 23:55:25,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-29 23:55:25,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 65. [2020-11-29 23:55:25,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-29 23:55:25,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2020-11-29 23:55:25,461 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 26 [2020-11-29 23:55:25,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:25,461 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2020-11-29 23:55:25,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 23:55:25,461 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2020-11-29 23:55:25,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 23:55:25,462 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:25,462 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] [2020-11-29 23:55:25,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-29 23:55:25,686 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]=== [2020-11-29 23:55:25,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:25,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1177713046, now seen corresponding path program 1 times [2020-11-29 23:55:25,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:25,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776496803] [2020-11-29 23:55:25,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:25,697 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:25,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2006156571] [2020-11-29 23:55:25,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:25,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 23:55:25,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:25,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776496803] [2020-11-29 23:55:25,813 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:25,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006156571] [2020-11-29 23:55:25,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:55:25,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-29 23:55:25,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611760889] [2020-11-29 23:55:25,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 23:55:25,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:25,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 23:55:25,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:55:25,815 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 6 states. [2020-11-29 23:55:25,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:25,858 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2020-11-29 23:55:25,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 23:55:25,858 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-11-29 23:55:25,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:25,859 INFO L225 Difference]: With dead ends: 76 [2020-11-29 23:55:25,859 INFO L226 Difference]: Without dead ends: 68 [2020-11-29 23:55:25,860 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 [2020-11-29 23:55:25,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-29 23:55:25,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-11-29 23:55:25,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-29 23:55:25,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2020-11-29 23:55:25,870 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 28 [2020-11-29 23:55:25,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:25,870 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2020-11-29 23:55:25,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 23:55:25,870 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2020-11-29 23:55:25,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-29 23:55:25,871 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:25,871 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] [2020-11-29 23:55:26,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:26,088 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]=== [2020-11-29 23:55:26,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:26,089 INFO L82 PathProgramCache]: Analyzing trace with hash 2145300502, now seen corresponding path program 1 times [2020-11-29 23:55:26,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:26,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241845980] [2020-11-29 23:55:26,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:26,096 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:26,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925819125] [2020-11-29 23:55:26,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:26,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:26,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 23:55:26,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:26,179 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:55:26,179 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:55:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:26,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241845980] [2020-11-29 23:55:26,230 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:26,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925819125] [2020-11-29 23:55:26,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:55:26,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-29 23:55:26,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258656419] [2020-11-29 23:55:26,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 23:55:26,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:26,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 23:55:26,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:55:26,232 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand 7 states. [2020-11-29 23:55:26,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:26,603 INFO L93 Difference]: Finished difference Result 204 states and 224 transitions. [2020-11-29 23:55:26,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 23:55:26,605 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-11-29 23:55:26,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:26,607 INFO L225 Difference]: With dead ends: 204 [2020-11-29 23:55:26,607 INFO L226 Difference]: Without dead ends: 196 [2020-11-29 23:55:26,607 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 [2020-11-29 23:55:26,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-11-29 23:55:26,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 110. [2020-11-29 23:55:26,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-11-29 23:55:26,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 140 transitions. [2020-11-29 23:55:26,637 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 140 transitions. Word has length 29 [2020-11-29 23:55:26,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:26,638 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 140 transitions. [2020-11-29 23:55:26,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 23:55:26,638 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 140 transitions. [2020-11-29 23:55:26,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-29 23:55:26,640 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:26,641 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:26,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:26,867 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]=== [2020-11-29 23:55:26,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:26,867 INFO L82 PathProgramCache]: Analyzing trace with hash 2079654343, now seen corresponding path program 1 times [2020-11-29 23:55:26,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:26,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365163024] [2020-11-29 23:55:26,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:26,877 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:26,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [34114235] [2020-11-29 23:55:26,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:26,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 23:55:26,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:27,011 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:55:27,012 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:55:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:27,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365163024] [2020-11-29 23:55:27,122 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:27,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34114235] [2020-11-29 23:55:27,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:55:27,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-29 23:55:27,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812270848] [2020-11-29 23:55:27,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 23:55:27,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:27,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 23:55:27,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:55:27,124 INFO L87 Difference]: Start difference. First operand 110 states and 140 transitions. Second operand 9 states. [2020-11-29 23:55:27,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:27,728 INFO L93 Difference]: Finished difference Result 195 states and 215 transitions. [2020-11-29 23:55:27,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 23:55:27,729 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-11-29 23:55:27,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:27,730 INFO L225 Difference]: With dead ends: 195 [2020-11-29 23:55:27,730 INFO L226 Difference]: Without dead ends: 193 [2020-11-29 23:55:27,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-11-29 23:55:27,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-11-29 23:55:27,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 113. [2020-11-29 23:55:27,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-11-29 23:55:27,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 143 transitions. [2020-11-29 23:55:27,755 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 143 transitions. Word has length 30 [2020-11-29 23:55:27,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:27,755 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 143 transitions. [2020-11-29 23:55:27,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 23:55:27,755 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 143 transitions. [2020-11-29 23:55:27,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-29 23:55:27,756 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:27,757 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] [2020-11-29 23:55:27,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-29 23:55:27,966 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]=== [2020-11-29 23:55:27,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:27,967 INFO L82 PathProgramCache]: Analyzing trace with hash 345831055, now seen corresponding path program 1 times [2020-11-29 23:55:27,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:27,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684822088] [2020-11-29 23:55:27,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:27,976 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:27,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1904782805] [2020-11-29 23:55:27,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:28,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:28,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 23:55:28,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:28,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684822088] [2020-11-29 23:55:28,100 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:28,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904782805] [2020-11-29 23:55:28,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:55:28,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-29 23:55:28,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547002609] [2020-11-29 23:55:28,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 23:55:28,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:28,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 23:55:28,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:55:28,102 INFO L87 Difference]: Start difference. First operand 113 states and 143 transitions. Second operand 6 states. [2020-11-29 23:55:28,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:28,152 INFO L93 Difference]: Finished difference Result 143 states and 176 transitions. [2020-11-29 23:55:28,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 23:55:28,154 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-11-29 23:55:28,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:28,155 INFO L225 Difference]: With dead ends: 143 [2020-11-29 23:55:28,155 INFO L226 Difference]: Without dead ends: 113 [2020-11-29 23:55:28,156 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 [2020-11-29 23:55:28,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-11-29 23:55:28,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-11-29 23:55:28,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-11-29 23:55:28,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 142 transitions. [2020-11-29 23:55:28,173 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 142 transitions. Word has length 30 [2020-11-29 23:55:28,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:28,173 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 142 transitions. [2020-11-29 23:55:28,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 23:55:28,173 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 142 transitions. [2020-11-29 23:55:28,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-29 23:55:28,174 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:28,174 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] [2020-11-29 23:55:28,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-29 23:55:28,375 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]=== [2020-11-29 23:55:28,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:28,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1388218666, now seen corresponding path program 1 times [2020-11-29 23:55:28,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:28,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454190901] [2020-11-29 23:55:28,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:28,383 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:28,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338397458] [2020-11-29 23:55:28,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:28,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:28,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 23:55:28,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:28,476 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:55:28,476 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:55:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:28,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454190901] [2020-11-29 23:55:28,562 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:28,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338397458] [2020-11-29 23:55:28,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:55:28,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-29 23:55:28,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166661489] [2020-11-29 23:55:28,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 23:55:28,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:28,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 23:55:28,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:55:28,564 INFO L87 Difference]: Start difference. First operand 113 states and 142 transitions. Second operand 7 states. [2020-11-29 23:55:28,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:28,795 INFO L93 Difference]: Finished difference Result 169 states and 211 transitions. [2020-11-29 23:55:28,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 23:55:28,797 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-11-29 23:55:28,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:28,800 INFO L225 Difference]: With dead ends: 169 [2020-11-29 23:55:28,800 INFO L226 Difference]: Without dead ends: 163 [2020-11-29 23:55:28,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:55:28,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-11-29 23:55:28,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 150. [2020-11-29 23:55:28,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-11-29 23:55:28,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 195 transitions. [2020-11-29 23:55:28,823 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 195 transitions. Word has length 32 [2020-11-29 23:55:28,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:28,825 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 195 transitions. [2020-11-29 23:55:28,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 23:55:28,825 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 195 transitions. [2020-11-29 23:55:28,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-29 23:55:28,831 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:28,831 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] [2020-11-29 23:55:29,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-29 23:55:29,046 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]=== [2020-11-29 23:55:29,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:29,047 INFO L82 PathProgramCache]: Analyzing trace with hash -2116589210, now seen corresponding path program 1 times [2020-11-29 23:55:29,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:29,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608871840] [2020-11-29 23:55:29,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:29,055 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:29,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1059550573] [2020-11-29 23:55:29,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:29,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 23:55:29,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:29,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:29,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608871840] [2020-11-29 23:55:29,186 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:29,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059550573] [2020-11-29 23:55:29,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:55:29,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-29 23:55:29,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858047448] [2020-11-29 23:55:29,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 23:55:29,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:29,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 23:55:29,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:55:29,187 INFO L87 Difference]: Start difference. First operand 150 states and 195 transitions. Second operand 7 states. [2020-11-29 23:55:29,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:29,292 INFO L93 Difference]: Finished difference Result 252 states and 331 transitions. [2020-11-29 23:55:29,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 23:55:29,293 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-11-29 23:55:29,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:29,295 INFO L225 Difference]: With dead ends: 252 [2020-11-29 23:55:29,295 INFO L226 Difference]: Without dead ends: 161 [2020-11-29 23:55:29,299 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 [2020-11-29 23:55:29,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-11-29 23:55:29,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2020-11-29 23:55:29,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-11-29 23:55:29,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 204 transitions. [2020-11-29 23:55:29,322 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 204 transitions. Word has length 34 [2020-11-29 23:55:29,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:29,322 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 204 transitions. [2020-11-29 23:55:29,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 23:55:29,323 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 204 transitions. [2020-11-29 23:55:29,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-29 23:55:29,327 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:29,327 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] [2020-11-29 23:55:29,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:29,542 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]=== [2020-11-29 23:55:29,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:29,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1656502963, now seen corresponding path program 1 times [2020-11-29 23:55:29,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:29,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548832470] [2020-11-29 23:55:29,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:29,552 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:29,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921302436] [2020-11-29 23:55:29,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:29,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-29 23:55:29,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:29,650 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:55:29,651 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:55:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:29,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548832470] [2020-11-29 23:55:29,819 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:29,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921302436] [2020-11-29 23:55:29,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:55:29,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-29 23:55:29,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671580128] [2020-11-29 23:55:29,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 23:55:29,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:29,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 23:55:29,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:55:29,821 INFO L87 Difference]: Start difference. First operand 159 states and 204 transitions. Second operand 9 states. [2020-11-29 23:55:30,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:30,358 INFO L93 Difference]: Finished difference Result 169 states and 210 transitions. [2020-11-29 23:55:30,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 23:55:30,359 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-11-29 23:55:30,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:30,361 INFO L225 Difference]: With dead ends: 169 [2020-11-29 23:55:30,362 INFO L226 Difference]: Without dead ends: 167 [2020-11-29 23:55:30,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-11-29 23:55:30,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-11-29 23:55:30,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 159. [2020-11-29 23:55:30,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-11-29 23:55:30,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 202 transitions. [2020-11-29 23:55:30,381 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 202 transitions. Word has length 34 [2020-11-29 23:55:30,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:30,382 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 202 transitions. [2020-11-29 23:55:30,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 23:55:30,382 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 202 transitions. [2020-11-29 23:55:30,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-29 23:55:30,384 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:30,384 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] [2020-11-29 23:55:30,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-29 23:55:30,598 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]=== [2020-11-29 23:55:30,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:30,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1533707824, now seen corresponding path program 1 times [2020-11-29 23:55:30,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:30,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070486671] [2020-11-29 23:55:30,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:30,613 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:30,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848595984] [2020-11-29 23:55:30,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:30,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:30,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 55 conjunts are in the unsatisfiable core [2020-11-29 23:55:30,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:30,756 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:55:30,756 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:55:31,017 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:55:31,017 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:55:31,732 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2020-11-29 23:55:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:31,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070486671] [2020-11-29 23:55:31,850 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:31,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848595984] [2020-11-29 23:55:31,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:55:31,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-29 23:55:31,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940372428] [2020-11-29 23:55:31,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 23:55:31,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:31,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 23:55:31,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-11-29 23:55:31,852 INFO L87 Difference]: Start difference. First operand 159 states and 202 transitions. Second operand 13 states. [2020-11-29 23:55:32,515 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-11-29 23:55:33,079 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-11-29 23:55:33,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:33,925 INFO L93 Difference]: Finished difference Result 186 states and 233 transitions. [2020-11-29 23:55:33,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 23:55:33,926 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-11-29 23:55:33,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:33,928 INFO L225 Difference]: With dead ends: 186 [2020-11-29 23:55:33,928 INFO L226 Difference]: Without dead ends: 184 [2020-11-29 23:55:33,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2020-11-29 23:55:33,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-11-29 23:55:33,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 159. [2020-11-29 23:55:33,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-11-29 23:55:33,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 200 transitions. [2020-11-29 23:55:33,948 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 200 transitions. Word has length 36 [2020-11-29 23:55:33,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:33,949 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 200 transitions. [2020-11-29 23:55:33,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 23:55:33,949 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 200 transitions. [2020-11-29 23:55:33,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-29 23:55:33,950 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:33,951 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] [2020-11-29 23:55:34,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 23:55:34,151 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]=== [2020-11-29 23:55:34,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:34,152 INFO L82 PathProgramCache]: Analyzing trace with hash -153983259, now seen corresponding path program 2 times [2020-11-29 23:55:34,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:34,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287543463] [2020-11-29 23:55:34,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:34,161 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:34,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821989120] [2020-11-29 23:55:34,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:34,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 23:55:34,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:55:34,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 23:55:34,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:34,301 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:55:34,301 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:55:34,414 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:55:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:34,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287543463] [2020-11-29 23:55:34,508 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:34,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821989120] [2020-11-29 23:55:34,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:55:34,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-29 23:55:34,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104349769] [2020-11-29 23:55:34,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 23:55:34,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:34,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 23:55:34,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-29 23:55:34,510 INFO L87 Difference]: Start difference. First operand 159 states and 200 transitions. Second operand 8 states. [2020-11-29 23:55:35,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:35,052 INFO L93 Difference]: Finished difference Result 308 states and 394 transitions. [2020-11-29 23:55:35,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 23:55:35,052 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-11-29 23:55:35,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:35,055 INFO L225 Difference]: With dead ends: 308 [2020-11-29 23:55:35,055 INFO L226 Difference]: Without dead ends: 306 [2020-11-29 23:55:35,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-29 23:55:35,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-11-29 23:55:35,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 239. [2020-11-29 23:55:35,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-11-29 23:55:35,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 319 transitions. [2020-11-29 23:55:35,085 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 319 transitions. Word has length 36 [2020-11-29 23:55:35,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:35,086 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 319 transitions. [2020-11-29 23:55:35,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 23:55:35,086 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 319 transitions. [2020-11-29 23:55:35,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-29 23:55:35,087 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:35,087 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] [2020-11-29 23:55:35,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-29 23:55:35,310 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]=== [2020-11-29 23:55:35,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:35,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1996662625, now seen corresponding path program 1 times [2020-11-29 23:55:35,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:35,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384446176] [2020-11-29 23:55:35,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:35,322 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:35,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2003309338] [2020-11-29 23:55:35,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:35,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 23:55:35,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:35,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384446176] [2020-11-29 23:55:35,463 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:35,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003309338] [2020-11-29 23:55:35,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:55:35,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-29 23:55:35,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884226471] [2020-11-29 23:55:35,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 23:55:35,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:35,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 23:55:35,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:55:35,465 INFO L87 Difference]: Start difference. First operand 239 states and 319 transitions. Second operand 7 states. [2020-11-29 23:55:35,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:35,566 INFO L93 Difference]: Finished difference Result 246 states and 326 transitions. [2020-11-29 23:55:35,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 23:55:35,566 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-11-29 23:55:35,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:35,569 INFO L225 Difference]: With dead ends: 246 [2020-11-29 23:55:35,569 INFO L226 Difference]: Without dead ends: 242 [2020-11-29 23:55:35,569 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 [2020-11-29 23:55:35,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-11-29 23:55:35,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2020-11-29 23:55:35,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-11-29 23:55:35,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 322 transitions. [2020-11-29 23:55:35,599 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 322 transitions. Word has length 38 [2020-11-29 23:55:35,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:35,599 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 322 transitions. [2020-11-29 23:55:35,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 23:55:35,599 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 322 transitions. [2020-11-29 23:55:35,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-29 23:55:35,600 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:35,600 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] [2020-11-29 23:55:35,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:35,814 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]=== [2020-11-29 23:55:35,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:35,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1767299967, now seen corresponding path program 1 times [2020-11-29 23:55:35,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:35,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473013557] [2020-11-29 23:55:35,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:35,822 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:35,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662102005] [2020-11-29 23:55:35,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:35,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:35,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 47 conjunts are in the unsatisfiable core [2020-11-29 23:55:35,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:36,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473013557] [2020-11-29 23:55:36,361 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:36,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662102005] [2020-11-29 23:55:36,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:55:36,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-29 23:55:36,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963254273] [2020-11-29 23:55:36,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 23:55:36,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:36,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 23:55:36,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-11-29 23:55:36,364 INFO L87 Difference]: Start difference. First operand 242 states and 322 transitions. Second operand 12 states. [2020-11-29 23:55:37,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:37,273 INFO L93 Difference]: Finished difference Result 289 states and 381 transitions. [2020-11-29 23:55:37,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 23:55:37,274 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-11-29 23:55:37,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:37,276 INFO L225 Difference]: With dead ends: 289 [2020-11-29 23:55:37,277 INFO L226 Difference]: Without dead ends: 283 [2020-11-29 23:55:37,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-11-29 23:55:37,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-11-29 23:55:37,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 276. [2020-11-29 23:55:37,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-11-29 23:55:37,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 369 transitions. [2020-11-29 23:55:37,311 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 369 transitions. Word has length 39 [2020-11-29 23:55:37,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:37,312 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 369 transitions. [2020-11-29 23:55:37,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 23:55:37,312 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 369 transitions. [2020-11-29 23:55:37,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-29 23:55:37,313 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:37,313 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:37,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:37,538 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]=== [2020-11-29 23:55:37,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:37,539 INFO L82 PathProgramCache]: Analyzing trace with hash 72031356, now seen corresponding path program 1 times [2020-11-29 23:55:37,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:37,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520514106] [2020-11-29 23:55:37,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:37,546 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:37,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [536078421] [2020-11-29 23:55:37,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:37,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-29 23:55:37,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-29 23:55:37,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520514106] [2020-11-29 23:55:37,649 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:37,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536078421] [2020-11-29 23:55:37,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:55:37,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-29 23:55:37,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235224676] [2020-11-29 23:55:37,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:55:37,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:37,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:55:37,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:55:37,651 INFO L87 Difference]: Start difference. First operand 276 states and 369 transitions. Second operand 5 states. [2020-11-29 23:55:37,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:37,892 INFO L93 Difference]: Finished difference Result 294 states and 380 transitions. [2020-11-29 23:55:37,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 23:55:37,892 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-11-29 23:55:37,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:37,894 INFO L225 Difference]: With dead ends: 294 [2020-11-29 23:55:37,895 INFO L226 Difference]: Without dead ends: 292 [2020-11-29 23:55:37,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:55:37,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-11-29 23:55:37,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 276. [2020-11-29 23:55:37,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-11-29 23:55:37,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 360 transitions. [2020-11-29 23:55:37,941 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 360 transitions. Word has length 40 [2020-11-29 23:55:37,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:37,941 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 360 transitions. [2020-11-29 23:55:37,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:55:37,941 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 360 transitions. [2020-11-29 23:55:37,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-29 23:55:37,942 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:37,942 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] [2020-11-29 23:55:38,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-29 23:55:38,158 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]=== [2020-11-29 23:55:38,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:38,159 INFO L82 PathProgramCache]: Analyzing trace with hash 455017590, now seen corresponding path program 2 times [2020-11-29 23:55:38,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:38,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960258705] [2020-11-29 23:55:38,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:38,175 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:38,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [419059801] [2020-11-29 23:55:38,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/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 [2020-11-29 23:55:38,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 23:55:38,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:55:38,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 23:55:38,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:38,298 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:38,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960258705] [2020-11-29 23:55:38,298 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:38,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419059801] [2020-11-29 23:55:38,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:55:38,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-29 23:55:38,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914059875] [2020-11-29 23:55:38,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 23:55:38,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:38,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 23:55:38,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-29 23:55:38,299 INFO L87 Difference]: Start difference. First operand 276 states and 360 transitions. Second operand 8 states. [2020-11-29 23:55:38,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:38,395 INFO L93 Difference]: Finished difference Result 300 states and 386 transitions. [2020-11-29 23:55:38,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 23:55:38,396 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-11-29 23:55:38,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:38,399 INFO L225 Difference]: With dead ends: 300 [2020-11-29 23:55:38,399 INFO L226 Difference]: Without dead ends: 290 [2020-11-29 23:55:38,401 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 [2020-11-29 23:55:38,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-11-29 23:55:38,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 289. [2020-11-29 23:55:38,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-11-29 23:55:38,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 374 transitions. [2020-11-29 23:55:38,430 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 374 transitions. Word has length 42 [2020-11-29 23:55:38,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:38,431 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 374 transitions. [2020-11-29 23:55:38,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 23:55:38,431 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 374 transitions. [2020-11-29 23:55:38,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-29 23:55:38,432 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:38,432 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] [2020-11-29 23:55:38,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-29 23:55:38,658 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]=== [2020-11-29 23:55:38,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:38,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1736909211, now seen corresponding path program 1 times [2020-11-29 23:55:38,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:38,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228207686] [2020-11-29 23:55:38,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:38,669 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:38,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341453600] [2020-11-29 23:55:38,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/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 [2020-11-29 23:55:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:38,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 23:55:38,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:38,814 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:38,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228207686] [2020-11-29 23:55:38,814 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:38,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341453600] [2020-11-29 23:55:38,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:55:38,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-29 23:55:38,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768166127] [2020-11-29 23:55:38,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 23:55:38,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:38,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 23:55:38,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-29 23:55:38,816 INFO L87 Difference]: Start difference. First operand 289 states and 374 transitions. Second operand 8 states. [2020-11-29 23:55:38,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:38,927 INFO L93 Difference]: Finished difference Result 448 states and 595 transitions. [2020-11-29 23:55:38,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 23:55:38,928 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-11-29 23:55:38,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:38,930 INFO L225 Difference]: With dead ends: 448 [2020-11-29 23:55:38,930 INFO L226 Difference]: Without dead ends: 291 [2020-11-29 23:55:38,932 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 [2020-11-29 23:55:38,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-11-29 23:55:38,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2020-11-29 23:55:38,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-11-29 23:55:38,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 374 transitions. [2020-11-29 23:55:38,960 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 374 transitions. Word has length 44 [2020-11-29 23:55:38,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:38,961 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 374 transitions. [2020-11-29 23:55:38,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 23:55:38,961 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 374 transitions. [2020-11-29 23:55:38,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-29 23:55:38,962 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:38,962 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] [2020-11-29 23:55:39,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:39,178 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]=== [2020-11-29 23:55:39,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:39,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1815469770, now seen corresponding path program 2 times [2020-11-29 23:55:39,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:39,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022859284] [2020-11-29 23:55:39,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:39,186 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:39,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653416003] [2020-11-29 23:55:39,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/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 [2020-11-29 23:55:39,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 23:55:39,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:55:39,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 23:55:39,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:39,376 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:39,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022859284] [2020-11-29 23:55:39,377 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:39,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653416003] [2020-11-29 23:55:39,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:55:39,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-29 23:55:39,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464184850] [2020-11-29 23:55:39,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 23:55:39,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:39,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 23:55:39,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:55:39,378 INFO L87 Difference]: Start difference. First operand 291 states and 374 transitions. Second operand 9 states. [2020-11-29 23:55:39,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:39,483 INFO L93 Difference]: Finished difference Result 345 states and 441 transitions. [2020-11-29 23:55:39,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 23:55:39,484 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-11-29 23:55:39,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:39,485 INFO L225 Difference]: With dead ends: 345 [2020-11-29 23:55:39,485 INFO L226 Difference]: Without dead ends: 146 [2020-11-29 23:55:39,486 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 [2020-11-29 23:55:39,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-11-29 23:55:39,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2020-11-29 23:55:39,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-11-29 23:55:39,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2020-11-29 23:55:39,507 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 46 [2020-11-29 23:55:39,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:39,508 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2020-11-29 23:55:39,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 23:55:39,508 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2020-11-29 23:55:39,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-29 23:55:39,509 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:39,509 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] [2020-11-29 23:55:39,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-29 23:55:39,734 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]=== [2020-11-29 23:55:39,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:39,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1624462181, now seen corresponding path program 1 times [2020-11-29 23:55:39,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:39,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491690292] [2020-11-29 23:55:39,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:39,742 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:39,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286467700] [2020-11-29 23:55:39,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/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 [2020-11-29 23:55:39,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:39,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 62 conjunts are in the unsatisfiable core [2020-11-29 23:55:39,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:40,112 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-11-29 23:55:40,114 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:55:40,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:55:40,767 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2020-11-29 23:55:40,809 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:55:40,983 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:40,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491690292] [2020-11-29 23:55:40,984 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:40,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286467700] [2020-11-29 23:55:40,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:55:40,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-11-29 23:55:40,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529619071] [2020-11-29 23:55:40,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 23:55:40,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:40,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 23:55:40,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-11-29 23:55:40,986 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand 14 states. [2020-11-29 23:55:47,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:47,572 INFO L93 Difference]: Finished difference Result 144 states and 158 transitions. [2020-11-29 23:55:47,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 23:55:47,573 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-11-29 23:55:47,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:47,574 INFO L225 Difference]: With dead ends: 144 [2020-11-29 23:55:47,574 INFO L226 Difference]: Without dead ends: 142 [2020-11-29 23:55:47,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-11-29 23:55:47,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-11-29 23:55:47,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2020-11-29 23:55:47,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-11-29 23:55:47,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 152 transitions. [2020-11-29 23:55:47,594 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 152 transitions. Word has length 46 [2020-11-29 23:55:47,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:47,594 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 152 transitions. [2020-11-29 23:55:47,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 23:55:47,594 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 152 transitions. [2020-11-29 23:55:47,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-29 23:55:47,595 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:47,595 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] [2020-11-29 23:55:47,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:47,810 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]=== [2020-11-29 23:55:47,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:47,811 INFO L82 PathProgramCache]: Analyzing trace with hash -63228902, now seen corresponding path program 3 times [2020-11-29 23:55:47,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:47,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782281053] [2020-11-29 23:55:47,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:47,818 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:47,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [962112455] [2020-11-29 23:55:47,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/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 [2020-11-29 23:55:47,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-29 23:55:47,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:55:47,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 23:55:47,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:47,906 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:55:47,906 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:55:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-29 23:55:47,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782281053] [2020-11-29 23:55:47,972 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:47,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962112455] [2020-11-29 23:55:47,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:55:47,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-29 23:55:47,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636964250] [2020-11-29 23:55:47,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:55:47,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:47,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:55:47,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:55:47,973 INFO L87 Difference]: Start difference. First operand 138 states and 152 transitions. Second operand 5 states. [2020-11-29 23:55:48,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:48,380 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2020-11-29 23:55:48,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:55:48,381 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-11-29 23:55:48,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:48,382 INFO L225 Difference]: With dead ends: 138 [2020-11-29 23:55:48,382 INFO L226 Difference]: Without dead ends: 136 [2020-11-29 23:55:48,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:55:48,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-11-29 23:55:48,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-11-29 23:55:48,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-11-29 23:55:48,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 150 transitions. [2020-11-29 23:55:48,401 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 150 transitions. Word has length 46 [2020-11-29 23:55:48,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:48,401 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 150 transitions. [2020-11-29 23:55:48,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:55:48,401 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 150 transitions. [2020-11-29 23:55:48,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-29 23:55:48,402 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:48,402 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] [2020-11-29 23:55:48,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-29 23:55:48,618 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]=== [2020-11-29 23:55:48,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:48,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1369624974, now seen corresponding path program 2 times [2020-11-29 23:55:48,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:48,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309128848] [2020-11-29 23:55:48,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:48,625 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:48,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033751895] [2020-11-29 23:55:48,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/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 [2020-11-29 23:55:48,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 23:55:48,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:55:48,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 23:55:48,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-29 23:55:48,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309128848] [2020-11-29 23:55:48,751 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:48,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033751895] [2020-11-29 23:55:48,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:55:48,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 23:55:48,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105357339] [2020-11-29 23:55:48,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:55:48,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:48,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:55:48,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:55:48,752 INFO L87 Difference]: Start difference. First operand 136 states and 150 transitions. Second operand 5 states. [2020-11-29 23:55:49,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:49,057 INFO L93 Difference]: Finished difference Result 180 states and 198 transitions. [2020-11-29 23:55:49,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 23:55:49,061 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-11-29 23:55:49,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:49,063 INFO L225 Difference]: With dead ends: 180 [2020-11-29 23:55:49,063 INFO L226 Difference]: Without dead ends: 157 [2020-11-29 23:55:49,063 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 [2020-11-29 23:55:49,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-11-29 23:55:49,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 127. [2020-11-29 23:55:49,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-11-29 23:55:49,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 138 transitions. [2020-11-29 23:55:49,078 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 138 transitions. Word has length 48 [2020-11-29 23:55:49,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:49,079 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 138 transitions. [2020-11-29 23:55:49,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:55:49,079 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 138 transitions. [2020-11-29 23:55:49,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-29 23:55:49,080 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:49,080 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] [2020-11-29 23:55:49,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-29 23:55:49,298 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:55:49,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:49,299 INFO L82 PathProgramCache]: Analyzing trace with hash 361320236, now seen corresponding path program 2 times [2020-11-29 23:55:49,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:49,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190381453] [2020-11-29 23:55:49,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:49,305 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:49,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [841387201] [2020-11-29 23:55:49,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:49,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 23:55:49,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:55:49,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 47 conjunts are in the unsatisfiable core [2020-11-29 23:55:49,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:55:49,538 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:55:49,538 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:55:49,879 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:55:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:49,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190381453] [2020-11-29 23:55:49,932 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:55:49,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841387201] [2020-11-29 23:55:49,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:55:49,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-29 23:55:49,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859039346] [2020-11-29 23:55:49,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 23:55:49,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:49,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 23:55:49,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-11-29 23:55:49,933 INFO L87 Difference]: Start difference. First operand 127 states and 138 transitions. Second operand 13 states. [2020-11-29 23:55:50,855 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-11-29 23:55:51,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:51,512 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2020-11-29 23:55:51,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 23:55:51,513 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-11-29 23:55:51,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:51,513 INFO L225 Difference]: With dead ends: 135 [2020-11-29 23:55:51,514 INFO L226 Difference]: Without dead ends: 131 [2020-11-29 23:55:51,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2020-11-29 23:55:51,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-11-29 23:55:51,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2020-11-29 23:55:51,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-11-29 23:55:51,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 139 transitions. [2020-11-29 23:55:51,529 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 139 transitions. Word has length 49 [2020-11-29 23:55:51,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:51,530 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 139 transitions. [2020-11-29 23:55:51,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 23:55:51,530 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 139 transitions. [2020-11-29 23:55:51,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-29 23:55:51,531 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:51,531 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] [2020-11-29 23:55:51,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-29 23:55:51,750 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:55:51,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:51,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1010714709, now seen corresponding path program 2 times [2020-11-29 23:55:51,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:51,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409741686] [2020-11-29 23:55:51,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:51,756 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:55:51,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [693496019] [2020-11-29 23:55:51,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:55:51,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 23:55:51,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-11-29 23:55:51,827 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:55:51,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:55:51,857 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:55:51,907 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:55:51,908 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 23:55:52,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-29 23:55:52,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 11:55:52 BoogieIcfgContainer [2020-11-29 23:55:52,201 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 23:55:52,201 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 23:55:52,201 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 23:55:52,201 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 23:55:52,202 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:55:20" (3/4) ... [2020-11-29 23:55:52,204 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 23:55:52,282 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_bdef1d28-3a1e-464c-b0ca-03e9b4ef9634/bin/uautomizer/witness.graphml [2020-11-29 23:55:52,282 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 23:55:52,283 INFO L168 Benchmark]: Toolchain (without parser) took 32599.31 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 77.4 MB in the beginning and 109.9 MB in the end (delta: -32.5 MB). Peak memory consumption was 69.3 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:52,284 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 113.2 MB. Free memory was 86.9 MB in the beginning and 86.9 MB in the end (delta: 30.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:55:52,284 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.49 ms. Allocated memory is still 113.2 MB. Free memory was 77.2 MB in the beginning and 87.4 MB in the end (delta: -10.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:52,284 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.87 ms. Allocated memory is still 113.2 MB. Free memory was 87.4 MB in the beginning and 85.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:52,285 INFO L168 Benchmark]: Boogie Preprocessor took 32.83 ms. Allocated memory is still 113.2 MB. Free memory was 85.8 MB in the beginning and 84.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:52,285 INFO L168 Benchmark]: RCFGBuilder took 648.99 ms. Allocated memory is still 113.2 MB. Free memory was 84.3 MB in the beginning and 66.4 MB in the end (delta: 17.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:52,285 INFO L168 Benchmark]: TraceAbstraction took 31499.92 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 65.9 MB in the beginning and 35.3 MB in the end (delta: 30.6 MB). Peak memory consumption was 55.2 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:52,286 INFO L168 Benchmark]: Witness Printer took 81.53 ms. Allocated memory is still 136.3 MB. Free memory was 35.3 MB in the beginning and 109.9 MB in the end (delta: -74.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:52,287 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 113.2 MB. Free memory was 86.9 MB in the beginning and 86.9 MB in the end (delta: 30.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 290.49 ms. Allocated memory is still 113.2 MB. Free memory was 77.2 MB in the beginning and 87.4 MB in the end (delta: -10.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.87 ms. Allocated memory is still 113.2 MB. Free memory was 87.4 MB in the beginning and 85.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.83 ms. Allocated memory is still 113.2 MB. Free memory was 85.8 MB in the beginning and 84.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 648.99 ms. Allocated memory is still 113.2 MB. Free memory was 84.3 MB in the beginning and 66.4 MB in the end (delta: 17.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 31499.92 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 65.9 MB in the beginning and 35.3 MB in the end (delta: 30.6 MB). Peak memory consumption was 55.2 MB. Max. memory is 16.1 GB. * Witness Printer took 81.53 ms. Allocated memory is still 136.3 MB. Free memory was 35.3 MB in the beginning and 109.9 MB in the end (delta: -74.6 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: 31.3s, OverallIterations: 29, TraceHistogramMax: 4, AutomataDifference: 16.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1131 SDtfs, 1787 SDslu, 3365 SDs, 0 SdLazy, 2671 SolverSat, 266 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 11.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 941 GetRequests, 701 SyntacticMatches, 5 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 7.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=291occurred in iteration=23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 28 MinimizatonAttempts, 434 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 5.4s InterpolantComputationTime, 943 NumberOfCodeBlocks, 923 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 863 ConstructedInterpolants, 0 QuantifiedInterpolants, 258780 SizeOfPredicates, 226 NumberOfNonLiveVariables, 4194 ConjunctsInSsa, 511 ConjunctsInUnsatCore, 28 InterpolantComputations, 9 PerfectInterpolantSequences, 128/325 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...