./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_a11523cc-349c-4c61-929f-015621ec9f6a/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/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 [2020-11-28 03:13:39,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:13:39,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:13:40,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:13:40,019 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:13:40,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:13:40,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:13:40,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:13:40,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:13:40,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:13:40,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:13:40,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:13:40,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:13:40,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:13:40,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:13:40,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:13:40,053 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:13:40,054 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:13:40,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:13:40,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:13:40,061 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:13:40,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:13:40,064 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:13:40,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:13:40,068 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:13:40,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:13:40,069 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:13:40,070 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:13:40,071 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:13:40,072 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:13:40,073 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:13:40,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:13:40,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:13:40,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:13:40,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:13:40,078 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:13:40,079 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:13:40,079 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:13:40,080 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:13:40,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:13:40,082 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:13:40,084 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:13:40,107 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:13:40,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:13:40,109 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:13:40,109 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:13:40,109 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:13:40,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:13:40,110 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:13:40,110 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:13:40,110 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:13:40,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:13:40,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:13:40,111 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:13:40,111 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:13:40,111 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:13:40,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:13:40,111 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:13:40,112 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:13:40,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:13:40,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:13:40,112 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:13:40,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:13:40,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:13:40,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:13:40,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:13:40,113 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:13:40,114 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:13:40,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:13:40,114 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:13:40,114 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:13:40,114 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_a11523cc-349c-4c61-929f-015621ec9f6a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39bcfd9082233c69fe35086fe400d50c1cc05bc1 [2020-11-28 03:13:40,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:13:40,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:13:40,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:13:40,462 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:13:40,464 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:13:40,465 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound5.c [2020-11-28 03:13:40,529 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/bin/uautomizer/data/cfc27ec8b/3a7299071aa54d28bb6410c8d9bf658b/FLAGed0bd4557 [2020-11-28 03:13:41,026 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:13:41,026 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound5.c [2020-11-28 03:13:41,040 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/bin/uautomizer/data/cfc27ec8b/3a7299071aa54d28bb6410c8d9bf658b/FLAGed0bd4557 [2020-11-28 03:13:41,375 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/bin/uautomizer/data/cfc27ec8b/3a7299071aa54d28bb6410c8d9bf658b [2020-11-28 03:13:41,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:13:41,379 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:13:41,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:13:41,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:13:41,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:13:41,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:13:41" (1/1) ... [2020-11-28 03:13:41,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c4668c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:13:41, skipping insertion in model container [2020-11-28 03:13:41,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:13:41" (1/1) ... [2020-11-28 03:13:41,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:13:41,412 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:13:41,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:13:41,616 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:13:41,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:13:41,648 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:13:41,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:13:41 WrapperNode [2020-11-28 03:13:41,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:13:41,650 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:13:41,650 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:13:41,650 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:13:41,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:13:41" (1/1) ... [2020-11-28 03:13:41,665 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:13:41" (1/1) ... [2020-11-28 03:13:41,689 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:13:41,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:13:41,690 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:13:41,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:13:41,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:13:41" (1/1) ... [2020-11-28 03:13:41,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:13:41" (1/1) ... [2020-11-28 03:13:41,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:13:41" (1/1) ... [2020-11-28 03:13:41,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:13:41" (1/1) ... [2020-11-28 03:13:41,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:13:41" (1/1) ... [2020-11-28 03:13:41,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:13:41" (1/1) ... [2020-11-28 03:13:41,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:13:41" (1/1) ... [2020-11-28 03:13:41,716 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:13:41,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:13:41,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:13:41,717 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:13:41,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:13:41" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:13:41,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:13:41,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:13:41,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:13:41,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:13:42,278 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:13:42,278 INFO L298 CfgBuilder]: Removed 38 assume(true) statements. [2020-11-28 03:13:42,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:13:42 BoogieIcfgContainer [2020-11-28 03:13:42,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:13:42,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:13:42,281 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:13:42,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:13:42,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:13:41" (1/3) ... [2020-11-28 03:13:42,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c65a98e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:13:42, skipping insertion in model container [2020-11-28 03:13:42,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:13:41" (2/3) ... [2020-11-28 03:13:42,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c65a98e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:13:42, skipping insertion in model container [2020-11-28 03:13:42,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:13:42" (3/3) ... [2020-11-28 03:13:42,293 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound5.c [2020-11-28 03:13:42,303 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:13:42,306 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-11-28 03:13:42,319 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-11-28 03:13:42,343 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:13:42,343 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:13:42,343 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:13:42,343 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:13:42,343 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:13:42,343 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:13:42,343 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:13:42,344 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:13:42,358 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-11-28 03:13:42,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 03:13:42,363 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:13:42,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:13:42,365 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]=== [2020-11-28 03:13:42,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:42,370 INFO L82 PathProgramCache]: Analyzing trace with hash -141659761, now seen corresponding path program 1 times [2020-11-28 03:13:42,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:42,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936557365] [2020-11-28 03:13:42,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:42,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:42,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936557365] [2020-11-28 03:13:42,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:13:42,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 03:13:42,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441612965] [2020-11-28 03:13:42,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 03:13:42,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:42,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 03:13:42,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 03:13:42,532 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2020-11-28 03:13:42,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:42,558 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2020-11-28 03:13:42,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 03:13:42,560 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-11-28 03:13:42,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:13:42,578 INFO L225 Difference]: With dead ends: 83 [2020-11-28 03:13:42,578 INFO L226 Difference]: Without dead ends: 39 [2020-11-28 03:13:42,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 03:13:42,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-28 03:13:42,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-11-28 03:13:42,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-28 03:13:42,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-11-28 03:13:42,611 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 13 [2020-11-28 03:13:42,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:13:42,612 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-11-28 03:13:42,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 03:13:42,612 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-11-28 03:13:42,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 03:13:42,613 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:13:42,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:13:42,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:13:42,614 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]=== [2020-11-28 03:13:42,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:42,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1057766562, now seen corresponding path program 1 times [2020-11-28 03:13:42,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:42,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814585335] [2020-11-28 03:13:42,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:42,643 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:13:42,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [607599086] [2020-11-28 03:13:42,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:13:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:42,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 03:13:42,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:42,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:42,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814585335] [2020-11-28 03:13:42,902 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:13:42,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607599086] [2020-11-28 03:13:42,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:13:42,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:13:42,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141507647] [2020-11-28 03:13:42,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:13:42,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:42,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:13:42,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:13:42,906 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 4 states. [2020-11-28 03:13:42,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:42,942 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-11-28 03:13:42,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:13:42,946 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-28 03:13:42,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:13:42,947 INFO L225 Difference]: With dead ends: 49 [2020-11-28 03:13:42,947 INFO L226 Difference]: Without dead ends: 41 [2020-11-28 03:13:42,948 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 [2020-11-28 03:13:42,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-28 03:13:42,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-11-28 03:13:42,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-28 03:13:42,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-11-28 03:13:42,959 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 14 [2020-11-28 03:13:42,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:13:42,961 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-11-28 03:13:42,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:13:42,961 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-11-28 03:13:42,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 03:13:42,963 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:13:42,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:13:43,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-28 03:13:43,177 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]=== [2020-11-28 03:13:43,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:43,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1568674210, now seen corresponding path program 1 times [2020-11-28 03:13:43,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:43,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029819925] [2020-11-28 03:13:43,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:43,201 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:13:43,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686546650] [2020-11-28 03:13:43,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:13:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:43,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:13:43,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:43,350 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 03:13:43,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:43,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:43,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029819925] [2020-11-28 03:13:43,387 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:13:43,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686546650] [2020-11-28 03:13:43,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:13:43,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:13:43,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859441856] [2020-11-28 03:13:43,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:13:43,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:43,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:13:43,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:13:43,389 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 5 states. [2020-11-28 03:13:43,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:43,591 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2020-11-28 03:13:43,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:13:43,592 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-11-28 03:13:43,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:13:43,594 INFO L225 Difference]: With dead ends: 69 [2020-11-28 03:13:43,594 INFO L226 Difference]: Without dead ends: 61 [2020-11-28 03:13:43,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:13:43,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-28 03:13:43,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2020-11-28 03:13:43,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-28 03:13:43,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-11-28 03:13:43,602 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 15 [2020-11-28 03:13:43,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:13:43,602 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-11-28 03:13:43,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:13:43,602 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-11-28 03:13:43,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 03:13:43,603 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:13:43,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:13:43,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:13:43,817 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]=== [2020-11-28 03:13:43,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:43,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1384108475, now seen corresponding path program 1 times [2020-11-28 03:13:43,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:43,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231557715] [2020-11-28 03:13:43,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:43,835 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:13:43,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274941701] [2020-11-28 03:13:43,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:13:43,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:43,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 03:13:43,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:43,940 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 03:13:43,940 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:44,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:44,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231557715] [2020-11-28 03:13:44,029 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:13:44,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274941701] [2020-11-28 03:13:44,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:13:44,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-28 03:13:44,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886538092] [2020-11-28 03:13:44,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:13:44,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:44,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:13:44,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:13:44,031 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 7 states. [2020-11-28 03:13:44,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:44,344 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2020-11-28 03:13:44,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 03:13:44,345 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-11-28 03:13:44,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:13:44,345 INFO L225 Difference]: With dead ends: 80 [2020-11-28 03:13:44,346 INFO L226 Difference]: Without dead ends: 78 [2020-11-28 03:13:44,346 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 [2020-11-28 03:13:44,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-28 03:13:44,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 45. [2020-11-28 03:13:44,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-28 03:13:44,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-11-28 03:13:44,354 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 16 [2020-11-28 03:13:44,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:13:44,354 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-11-28 03:13:44,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:13:44,354 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-11-28 03:13:44,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 03:13:44,355 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:13:44,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:13:44,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:13:44,570 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]=== [2020-11-28 03:13:44,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:44,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1311429602, now seen corresponding path program 1 times [2020-11-28 03:13:44,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:44,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332821841] [2020-11-28 03:13:44,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:44,601 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:13:44,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195456192] [2020-11-28 03:13:44,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:13:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:44,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 03:13:44,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:44,678 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 03:13:44,678 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:44,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:44,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332821841] [2020-11-28 03:13:44,731 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:13:44,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195456192] [2020-11-28 03:13:44,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:13:44,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-28 03:13:44,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168199122] [2020-11-28 03:13:44,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:13:44,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:44,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:13:44,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:13:44,734 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 6 states. [2020-11-28 03:13:44,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:44,945 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-11-28 03:13:44,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:13:44,947 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-11-28 03:13:44,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:13:44,948 INFO L225 Difference]: With dead ends: 64 [2020-11-28 03:13:44,948 INFO L226 Difference]: Without dead ends: 62 [2020-11-28 03:13:44,949 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 [2020-11-28 03:13:44,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-28 03:13:44,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2020-11-28 03:13:44,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-28 03:13:44,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-11-28 03:13:44,962 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 18 [2020-11-28 03:13:44,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:13:44,962 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-11-28 03:13:44,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:13:44,962 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-11-28 03:13:44,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 03:13:44,964 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:13:44,964 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:13:45,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:13:45,188 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]=== [2020-11-28 03:13:45,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:45,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1976639322, now seen corresponding path program 1 times [2020-11-28 03:13:45,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:45,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082548625] [2020-11-28 03:13:45,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:45,201 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:13:45,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1162379223] [2020-11-28 03:13:45,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:13:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:45,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 03:13:45,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:45,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082548625] [2020-11-28 03:13:45,321 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:13:45,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162379223] [2020-11-28 03:13:45,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:13:45,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:13:45,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341334285] [2020-11-28 03:13:45,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:13:45,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:45,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:13:45,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:13:45,323 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 5 states. [2020-11-28 03:13:45,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:45,359 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2020-11-28 03:13:45,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:13:45,363 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-11-28 03:13:45,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:13:45,365 INFO L225 Difference]: With dead ends: 85 [2020-11-28 03:13:45,365 INFO L226 Difference]: Without dead ends: 55 [2020-11-28 03:13:45,366 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 [2020-11-28 03:13:45,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-28 03:13:45,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-11-28 03:13:45,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-28 03:13:45,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-11-28 03:13:45,385 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 20 [2020-11-28 03:13:45,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:13:45,388 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-11-28 03:13:45,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:13:45,388 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-11-28 03:13:45,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 03:13:45,389 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:13:45,389 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] [2020-11-28 03:13:45,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-28 03:13:45,590 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]=== [2020-11-28 03:13:45,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:45,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1858241727, now seen corresponding path program 1 times [2020-11-28 03:13:45,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:45,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887840315] [2020-11-28 03:13:45,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:45,601 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:13:45,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827510072] [2020-11-28 03:13:45,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:13:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:45,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 03:13:45,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:45,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:45,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887840315] [2020-11-28 03:13:45,731 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:13:45,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827510072] [2020-11-28 03:13:45,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:13:45,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:13:45,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673920927] [2020-11-28 03:13:45,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:13:45,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:45,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:13:45,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:13:45,733 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 4 states. [2020-11-28 03:13:45,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:45,830 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2020-11-28 03:13:45,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:13:45,830 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-28 03:13:45,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:13:45,832 INFO L225 Difference]: With dead ends: 62 [2020-11-28 03:13:45,832 INFO L226 Difference]: Without dead ends: 60 [2020-11-28 03:13:45,832 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 [2020-11-28 03:13:45,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-28 03:13:45,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2020-11-28 03:13:45,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-28 03:13:45,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-11-28 03:13:45,840 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 20 [2020-11-28 03:13:45,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:13:45,841 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-11-28 03:13:45,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:13:45,841 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-11-28 03:13:45,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 03:13:45,841 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:13:45,842 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] [2020-11-28 03:13:46,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:13:46,056 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]=== [2020-11-28 03:13:46,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:46,057 INFO L82 PathProgramCache]: Analyzing trace with hash 936283940, now seen corresponding path program 1 times [2020-11-28 03:13:46,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:46,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099200567] [2020-11-28 03:13:46,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:46,068 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:13:46,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667012192] [2020-11-28 03:13:46,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:13:46,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:46,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-28 03:13:46,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:46,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:46,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099200567] [2020-11-28 03:13:46,220 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:13:46,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667012192] [2020-11-28 03:13:46,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:13:46,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:13:46,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025395056] [2020-11-28 03:13:46,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:13:46,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:46,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:13:46,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:13:46,222 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 5 states. [2020-11-28 03:13:46,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:46,334 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-11-28 03:13:46,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:13:46,335 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-11-28 03:13:46,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:13:46,335 INFO L225 Difference]: With dead ends: 67 [2020-11-28 03:13:46,335 INFO L226 Difference]: Without dead ends: 65 [2020-11-28 03:13:46,336 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 [2020-11-28 03:13:46,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-28 03:13:46,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2020-11-28 03:13:46,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-28 03:13:46,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-11-28 03:13:46,346 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 22 [2020-11-28 03:13:46,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:13:46,346 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-11-28 03:13:46,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:13:46,346 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-11-28 03:13:46,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-28 03:13:46,347 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:13:46,347 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] [2020-11-28 03:13:46,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:13:46,560 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]=== [2020-11-28 03:13:46,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:46,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1931900048, now seen corresponding path program 1 times [2020-11-28 03:13:46,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:46,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642107280] [2020-11-28 03:13:46,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:46,573 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:13:46,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2054222944] [2020-11-28 03:13:46,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/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 [2020-11-28 03:13:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:46,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-28 03:13:46,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:46,679 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 03:13:46,679 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:46,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:46,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642107280] [2020-11-28 03:13:46,769 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:13:46,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054222944] [2020-11-28 03:13:46,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:13:46,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-28 03:13:46,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476590293] [2020-11-28 03:13:46,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:13:46,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:46,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:13:46,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:13:46,770 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 8 states. [2020-11-28 03:13:47,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:47,085 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2020-11-28 03:13:47,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 03:13:47,086 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-11-28 03:13:47,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:13:47,087 INFO L225 Difference]: With dead ends: 79 [2020-11-28 03:13:47,087 INFO L226 Difference]: Without dead ends: 77 [2020-11-28 03:13:47,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:13:47,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-28 03:13:47,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 65. [2020-11-28 03:13:47,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-28 03:13:47,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2020-11-28 03:13:47,102 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 26 [2020-11-28 03:13:47,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:13:47,104 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2020-11-28 03:13:47,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:13:47,104 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2020-11-28 03:13:47,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-28 03:13:47,105 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:13:47,106 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] [2020-11-28 03:13:47,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-28 03:13:47,307 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]=== [2020-11-28 03:13:47,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:47,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1177713046, now seen corresponding path program 1 times [2020-11-28 03:13:47,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:47,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710887320] [2020-11-28 03:13:47,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:47,317 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:13:47,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352896109] [2020-11-28 03:13:47,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/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 [2020-11-28 03:13:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:47,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:13:47,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:47,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710887320] [2020-11-28 03:13:47,436 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:13:47,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352896109] [2020-11-28 03:13:47,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:13:47,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-28 03:13:47,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412743484] [2020-11-28 03:13:47,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:13:47,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:47,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:13:47,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:13:47,438 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 6 states. [2020-11-28 03:13:47,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:47,474 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2020-11-28 03:13:47,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:13:47,474 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-11-28 03:13:47,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:13:47,475 INFO L225 Difference]: With dead ends: 76 [2020-11-28 03:13:47,475 INFO L226 Difference]: Without dead ends: 68 [2020-11-28 03:13:47,476 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 [2020-11-28 03:13:47,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-28 03:13:47,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-11-28 03:13:47,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-28 03:13:47,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2020-11-28 03:13:47,485 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 28 [2020-11-28 03:13:47,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:13:47,485 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2020-11-28 03:13:47,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:13:47,486 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2020-11-28 03:13:47,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-28 03:13:47,487 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:13:47,487 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] [2020-11-28 03:13:47,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:13:47,712 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]=== [2020-11-28 03:13:47,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:47,713 INFO L82 PathProgramCache]: Analyzing trace with hash 2145300502, now seen corresponding path program 1 times [2020-11-28 03:13:47,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:47,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426424210] [2020-11-28 03:13:47,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:47,722 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:13:47,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1507810976] [2020-11-28 03:13:47,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/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 [2020-11-28 03:13:47,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:47,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 03:13:47,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:47,834 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 03:13:47,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:47,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:47,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426424210] [2020-11-28 03:13:47,877 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:13:47,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507810976] [2020-11-28 03:13:47,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:13:47,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-28 03:13:47,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515433797] [2020-11-28 03:13:47,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:13:47,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:47,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:13:47,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:13:47,879 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand 7 states. [2020-11-28 03:13:48,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:48,233 INFO L93 Difference]: Finished difference Result 204 states and 224 transitions. [2020-11-28 03:13:48,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 03:13:48,234 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-11-28 03:13:48,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:13:48,235 INFO L225 Difference]: With dead ends: 204 [2020-11-28 03:13:48,235 INFO L226 Difference]: Without dead ends: 196 [2020-11-28 03:13:48,236 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 [2020-11-28 03:13:48,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-11-28 03:13:48,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 110. [2020-11-28 03:13:48,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-11-28 03:13:48,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 140 transitions. [2020-11-28 03:13:48,266 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 140 transitions. Word has length 29 [2020-11-28 03:13:48,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:13:48,266 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 140 transitions. [2020-11-28 03:13:48,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:13:48,266 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 140 transitions. [2020-11-28 03:13:48,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-28 03:13:48,267 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:13:48,268 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] [2020-11-28 03:13:48,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:13:48,492 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]=== [2020-11-28 03:13:48,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:48,493 INFO L82 PathProgramCache]: Analyzing trace with hash 2079654343, now seen corresponding path program 1 times [2020-11-28 03:13:48,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:48,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940120410] [2020-11-28 03:13:48,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:48,502 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:13:48,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113382582] [2020-11-28 03:13:48,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/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 [2020-11-28 03:13:48,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:48,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-28 03:13:48,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:48,587 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 03:13:48,587 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:48,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:48,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940120410] [2020-11-28 03:13:48,675 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:13:48,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113382582] [2020-11-28 03:13:48,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:13:48,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-28 03:13:48,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239336005] [2020-11-28 03:13:48,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 03:13:48,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:48,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 03:13:48,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:13:48,676 INFO L87 Difference]: Start difference. First operand 110 states and 140 transitions. Second operand 9 states. [2020-11-28 03:13:49,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:49,283 INFO L93 Difference]: Finished difference Result 195 states and 215 transitions. [2020-11-28 03:13:49,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-28 03:13:49,284 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-11-28 03:13:49,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:13:49,286 INFO L225 Difference]: With dead ends: 195 [2020-11-28 03:13:49,286 INFO L226 Difference]: Without dead ends: 193 [2020-11-28 03:13:49,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-11-28 03:13:49,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-11-28 03:13:49,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 113. [2020-11-28 03:13:49,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-11-28 03:13:49,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 143 transitions. [2020-11-28 03:13:49,311 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 143 transitions. Word has length 30 [2020-11-28 03:13:49,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:13:49,312 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 143 transitions. [2020-11-28 03:13:49,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 03:13:49,312 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 143 transitions. [2020-11-28 03:13:49,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-28 03:13:49,313 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:13:49,313 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] [2020-11-28 03:13:49,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-28 03:13:49,531 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]=== [2020-11-28 03:13:49,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:49,532 INFO L82 PathProgramCache]: Analyzing trace with hash 345831055, now seen corresponding path program 1 times [2020-11-28 03:13:49,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:49,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975603429] [2020-11-28 03:13:49,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:49,552 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:13:49,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154912219] [2020-11-28 03:13:49,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/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 [2020-11-28 03:13:49,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:49,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:13:49,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:49,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975603429] [2020-11-28 03:13:49,649 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:13:49,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154912219] [2020-11-28 03:13:49,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:13:49,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-28 03:13:49,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299996084] [2020-11-28 03:13:49,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:13:49,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:49,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:13:49,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:13:49,651 INFO L87 Difference]: Start difference. First operand 113 states and 143 transitions. Second operand 6 states. [2020-11-28 03:13:49,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:49,687 INFO L93 Difference]: Finished difference Result 143 states and 176 transitions. [2020-11-28 03:13:49,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:13:49,688 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-11-28 03:13:49,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:13:49,689 INFO L225 Difference]: With dead ends: 143 [2020-11-28 03:13:49,689 INFO L226 Difference]: Without dead ends: 113 [2020-11-28 03:13:49,690 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 [2020-11-28 03:13:49,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-11-28 03:13:49,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-11-28 03:13:49,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-11-28 03:13:49,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 142 transitions. [2020-11-28 03:13:49,701 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 142 transitions. Word has length 30 [2020-11-28 03:13:49,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:13:49,702 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 142 transitions. [2020-11-28 03:13:49,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:13:49,702 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 142 transitions. [2020-11-28 03:13:49,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-28 03:13:49,703 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:13:49,703 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] [2020-11-28 03:13:49,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-28 03:13:49,928 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]=== [2020-11-28 03:13:49,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:49,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1388218666, now seen corresponding path program 1 times [2020-11-28 03:13:49,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:49,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855437966] [2020-11-28 03:13:49,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:49,938 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:13:49,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034315331] [2020-11-28 03:13:49,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/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 [2020-11-28 03:13:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:50,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-28 03:13:50,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:50,074 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 03:13:50,075 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:50,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855437966] [2020-11-28 03:13:50,154 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:13:50,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034315331] [2020-11-28 03:13:50,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:13:50,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-28 03:13:50,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641489867] [2020-11-28 03:13:50,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:13:50,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:50,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:13:50,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:13:50,156 INFO L87 Difference]: Start difference. First operand 113 states and 142 transitions. Second operand 7 states. [2020-11-28 03:13:50,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:50,376 INFO L93 Difference]: Finished difference Result 169 states and 211 transitions. [2020-11-28 03:13:50,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:13:50,376 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-11-28 03:13:50,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:13:50,379 INFO L225 Difference]: With dead ends: 169 [2020-11-28 03:13:50,379 INFO L226 Difference]: Without dead ends: 163 [2020-11-28 03:13:50,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:13:50,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-11-28 03:13:50,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 150. [2020-11-28 03:13:50,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-11-28 03:13:50,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 195 transitions. [2020-11-28 03:13:50,397 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 195 transitions. Word has length 32 [2020-11-28 03:13:50,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:13:50,398 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 195 transitions. [2020-11-28 03:13:50,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:13:50,398 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 195 transitions. [2020-11-28 03:13:50,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-28 03:13:50,402 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:13:50,402 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] [2020-11-28 03:13:50,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-28 03:13:50,628 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]=== [2020-11-28 03:13:50,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:50,628 INFO L82 PathProgramCache]: Analyzing trace with hash -2116589210, now seen corresponding path program 1 times [2020-11-28 03:13:50,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:50,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218305475] [2020-11-28 03:13:50,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:50,636 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:13:50,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [18698716] [2020-11-28 03:13:50,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/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 [2020-11-28 03:13:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:50,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 03:13:50,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:50,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218305475] [2020-11-28 03:13:50,803 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:13:50,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18698716] [2020-11-28 03:13:50,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:13:50,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-28 03:13:50,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345608258] [2020-11-28 03:13:50,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:13:50,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:50,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:13:50,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:13:50,804 INFO L87 Difference]: Start difference. First operand 150 states and 195 transitions. Second operand 7 states. [2020-11-28 03:13:50,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:50,879 INFO L93 Difference]: Finished difference Result 252 states and 331 transitions. [2020-11-28 03:13:50,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 03:13:50,880 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-11-28 03:13:50,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:13:50,881 INFO L225 Difference]: With dead ends: 252 [2020-11-28 03:13:50,881 INFO L226 Difference]: Without dead ends: 161 [2020-11-28 03:13:50,885 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 [2020-11-28 03:13:50,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-11-28 03:13:50,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2020-11-28 03:13:50,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-11-28 03:13:50,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 204 transitions. [2020-11-28 03:13:50,903 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 204 transitions. Word has length 34 [2020-11-28 03:13:50,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:13:50,903 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 204 transitions. [2020-11-28 03:13:50,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:13:50,903 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 204 transitions. [2020-11-28 03:13:50,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-28 03:13:50,904 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:13:50,904 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] [2020-11-28 03:13:51,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:13:51,118 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]=== [2020-11-28 03:13:51,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:51,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1656502963, now seen corresponding path program 1 times [2020-11-28 03:13:51,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:51,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259162702] [2020-11-28 03:13:51,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:51,126 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:13:51,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [562819308] [2020-11-28 03:13:51,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/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 [2020-11-28 03:13:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:51,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-28 03:13:51,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:51,198 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 03:13:51,198 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:51,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259162702] [2020-11-28 03:13:51,342 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:13:51,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562819308] [2020-11-28 03:13:51,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:13:51,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-28 03:13:51,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408895519] [2020-11-28 03:13:51,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 03:13:51,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:51,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 03:13:51,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:13:51,344 INFO L87 Difference]: Start difference. First operand 159 states and 204 transitions. Second operand 9 states. [2020-11-28 03:13:51,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:51,846 INFO L93 Difference]: Finished difference Result 169 states and 210 transitions. [2020-11-28 03:13:51,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 03:13:51,847 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-11-28 03:13:51,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:13:51,848 INFO L225 Difference]: With dead ends: 169 [2020-11-28 03:13:51,848 INFO L226 Difference]: Without dead ends: 167 [2020-11-28 03:13:51,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-11-28 03:13:51,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-11-28 03:13:51,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 159. [2020-11-28 03:13:51,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-11-28 03:13:51,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 202 transitions. [2020-11-28 03:13:51,867 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 202 transitions. Word has length 34 [2020-11-28 03:13:51,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:13:51,868 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 202 transitions. [2020-11-28 03:13:51,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 03:13:51,868 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 202 transitions. [2020-11-28 03:13:51,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-28 03:13:51,868 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:13:51,869 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] [2020-11-28 03:13:52,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-28 03:13:52,076 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]=== [2020-11-28 03:13:52,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:52,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1533707824, now seen corresponding path program 1 times [2020-11-28 03:13:52,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:52,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829805383] [2020-11-28 03:13:52,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:52,084 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:13:52,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1075212337] [2020-11-28 03:13:52,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/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 [2020-11-28 03:13:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:52,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 55 conjunts are in the unsatisfiable core [2020-11-28 03:13:52,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:52,160 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 03:13:52,161 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:52,337 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 03:13:52,337 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:52,918 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2020-11-28 03:13:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:52,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829805383] [2020-11-28 03:13:52,978 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:13:52,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075212337] [2020-11-28 03:13:52,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:13:52,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-28 03:13:52,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415351725] [2020-11-28 03:13:52,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 03:13:52,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:52,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 03:13:52,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:13:52,980 INFO L87 Difference]: Start difference. First operand 159 states and 202 transitions. Second operand 13 states. [2020-11-28 03:13:53,461 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-11-28 03:13:53,872 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-11-28 03:13:54,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:54,487 INFO L93 Difference]: Finished difference Result 186 states and 233 transitions. [2020-11-28 03:13:54,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-28 03:13:54,488 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-11-28 03:13:54,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:13:54,489 INFO L225 Difference]: With dead ends: 186 [2020-11-28 03:13:54,489 INFO L226 Difference]: Without dead ends: 184 [2020-11-28 03:13:54,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2020-11-28 03:13:54,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-11-28 03:13:54,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 159. [2020-11-28 03:13:54,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-11-28 03:13:54,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 200 transitions. [2020-11-28 03:13:54,506 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 200 transitions. Word has length 36 [2020-11-28 03:13:54,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:13:54,506 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 200 transitions. [2020-11-28 03:13:54,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 03:13:54,506 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 200 transitions. [2020-11-28 03:13:54,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-28 03:13:54,507 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:13:54,507 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] [2020-11-28 03:13:54,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-28 03:13:54,720 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]=== [2020-11-28 03:13:54,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:54,721 INFO L82 PathProgramCache]: Analyzing trace with hash -153983259, now seen corresponding path program 2 times [2020-11-28 03:13:54,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:54,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915044892] [2020-11-28 03:13:54,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:54,735 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:13:54,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88973288] [2020-11-28 03:13:54,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/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 [2020-11-28 03:13:54,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:13:54,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:13:54,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-28 03:13:54,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:54,872 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 03:13:54,873 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:54,965 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:13:55,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:55,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915044892] [2020-11-28 03:13:55,028 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:13:55,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88973288] [2020-11-28 03:13:55,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:13:55,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-28 03:13:55,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600421640] [2020-11-28 03:13:55,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:13:55,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:55,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:13:55,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:13:55,030 INFO L87 Difference]: Start difference. First operand 159 states and 200 transitions. Second operand 8 states. [2020-11-28 03:13:55,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:55,480 INFO L93 Difference]: Finished difference Result 308 states and 394 transitions. [2020-11-28 03:13:55,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 03:13:55,481 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-11-28 03:13:55,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:13:55,483 INFO L225 Difference]: With dead ends: 308 [2020-11-28 03:13:55,483 INFO L226 Difference]: Without dead ends: 306 [2020-11-28 03:13:55,484 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 [2020-11-28 03:13:55,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-11-28 03:13:55,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 239. [2020-11-28 03:13:55,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-11-28 03:13:55,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 319 transitions. [2020-11-28 03:13:55,515 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 319 transitions. Word has length 36 [2020-11-28 03:13:55,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:13:55,515 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 319 transitions. [2020-11-28 03:13:55,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:13:55,516 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 319 transitions. [2020-11-28 03:13:55,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-28 03:13:55,517 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:13:55,517 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] [2020-11-28 03:13:55,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-28 03:13:55,732 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]=== [2020-11-28 03:13:55,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:55,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1996662625, now seen corresponding path program 1 times [2020-11-28 03:13:55,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:55,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134096290] [2020-11-28 03:13:55,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:55,742 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:13:55,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584322199] [2020-11-28 03:13:55,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/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 [2020-11-28 03:13:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:55,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 03:13:55,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:55,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:55,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134096290] [2020-11-28 03:13:55,873 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:13:55,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584322199] [2020-11-28 03:13:55,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:13:55,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-28 03:13:55,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270648670] [2020-11-28 03:13:55,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:13:55,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:55,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:13:55,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:13:55,875 INFO L87 Difference]: Start difference. First operand 239 states and 319 transitions. Second operand 7 states. [2020-11-28 03:13:55,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:55,971 INFO L93 Difference]: Finished difference Result 246 states and 326 transitions. [2020-11-28 03:13:55,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 03:13:55,972 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-11-28 03:13:55,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:13:55,974 INFO L225 Difference]: With dead ends: 246 [2020-11-28 03:13:55,975 INFO L226 Difference]: Without dead ends: 242 [2020-11-28 03:13:55,975 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 [2020-11-28 03:13:55,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-11-28 03:13:56,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2020-11-28 03:13:56,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-11-28 03:13:56,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 322 transitions. [2020-11-28 03:13:56,005 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 322 transitions. Word has length 38 [2020-11-28 03:13:56,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:13:56,005 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 322 transitions. [2020-11-28 03:13:56,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:13:56,006 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 322 transitions. [2020-11-28 03:13:56,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-28 03:13:56,006 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:13:56,007 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] [2020-11-28 03:13:56,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:13:56,220 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]=== [2020-11-28 03:13:56,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:56,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1767299967, now seen corresponding path program 1 times [2020-11-28 03:13:56,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:56,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143553132] [2020-11-28 03:13:56,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:56,229 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:13:56,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1699249908] [2020-11-28 03:13:56,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/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 [2020-11-28 03:13:56,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:56,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 47 conjunts are in the unsatisfiable core [2020-11-28 03:13:56,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:56,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143553132] [2020-11-28 03:13:56,741 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:13:56,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699249908] [2020-11-28 03:13:56,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:13:56,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-28 03:13:56,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607464775] [2020-11-28 03:13:56,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 03:13:56,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:56,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 03:13:56,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:13:56,744 INFO L87 Difference]: Start difference. First operand 242 states and 322 transitions. Second operand 12 states. [2020-11-28 03:13:57,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:57,506 INFO L93 Difference]: Finished difference Result 289 states and 381 transitions. [2020-11-28 03:13:57,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-28 03:13:57,506 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-11-28 03:13:57,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:13:57,508 INFO L225 Difference]: With dead ends: 289 [2020-11-28 03:13:57,508 INFO L226 Difference]: Without dead ends: 283 [2020-11-28 03:13:57,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-11-28 03:13:57,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-11-28 03:13:57,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 276. [2020-11-28 03:13:57,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-11-28 03:13:57,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 369 transitions. [2020-11-28 03:13:57,539 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 369 transitions. Word has length 39 [2020-11-28 03:13:57,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:13:57,539 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 369 transitions. [2020-11-28 03:13:57,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 03:13:57,539 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 369 transitions. [2020-11-28 03:13:57,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-28 03:13:57,540 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:13:57,540 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] [2020-11-28 03:13:57,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:13:57,744 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]=== [2020-11-28 03:13:57,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:57,744 INFO L82 PathProgramCache]: Analyzing trace with hash 72031356, now seen corresponding path program 1 times [2020-11-28 03:13:57,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:57,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366785433] [2020-11-28 03:13:57,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:57,751 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:13:57,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [329878202] [2020-11-28 03:13:57,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/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 [2020-11-28 03:13:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:57,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-28 03:13:57,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-28 03:13:57,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366785433] [2020-11-28 03:13:57,832 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:13:57,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329878202] [2020-11-28 03:13:57,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:13:57,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-28 03:13:57,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774553981] [2020-11-28 03:13:57,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:13:57,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:57,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:13:57,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:13:57,834 INFO L87 Difference]: Start difference. First operand 276 states and 369 transitions. Second operand 5 states. [2020-11-28 03:13:58,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:58,103 INFO L93 Difference]: Finished difference Result 294 states and 380 transitions. [2020-11-28 03:13:58,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:13:58,103 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-11-28 03:13:58,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:13:58,105 INFO L225 Difference]: With dead ends: 294 [2020-11-28 03:13:58,105 INFO L226 Difference]: Without dead ends: 292 [2020-11-28 03:13:58,106 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 [2020-11-28 03:13:58,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-11-28 03:13:58,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 276. [2020-11-28 03:13:58,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-11-28 03:13:58,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 360 transitions. [2020-11-28 03:13:58,136 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 360 transitions. Word has length 40 [2020-11-28 03:13:58,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:13:58,136 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 360 transitions. [2020-11-28 03:13:58,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:13:58,137 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 360 transitions. [2020-11-28 03:13:58,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-28 03:13:58,137 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:13:58,138 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] [2020-11-28 03:13:58,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-28 03:13:58,352 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]=== [2020-11-28 03:13:58,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:58,353 INFO L82 PathProgramCache]: Analyzing trace with hash 455017590, now seen corresponding path program 2 times [2020-11-28 03:13:58,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:58,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820105893] [2020-11-28 03:13:58,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:58,364 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:13:58,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552962582] [2020-11-28 03:13:58,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/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 [2020-11-28 03:13:58,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:13:58,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:13:58,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:13:58,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:58,548 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:58,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820105893] [2020-11-28 03:13:58,549 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:13:58,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552962582] [2020-11-28 03:13:58,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:13:58,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-28 03:13:58,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248671400] [2020-11-28 03:13:58,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:13:58,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:58,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:13:58,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:13:58,551 INFO L87 Difference]: Start difference. First operand 276 states and 360 transitions. Second operand 8 states. [2020-11-28 03:13:58,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:58,676 INFO L93 Difference]: Finished difference Result 300 states and 386 transitions. [2020-11-28 03:13:58,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 03:13:58,678 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-11-28 03:13:58,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:13:58,682 INFO L225 Difference]: With dead ends: 300 [2020-11-28 03:13:58,682 INFO L226 Difference]: Without dead ends: 290 [2020-11-28 03:13:58,684 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 [2020-11-28 03:13:58,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-11-28 03:13:58,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 289. [2020-11-28 03:13:58,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-11-28 03:13:58,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 374 transitions. [2020-11-28 03:13:58,720 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 374 transitions. Word has length 42 [2020-11-28 03:13:58,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:13:58,721 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 374 transitions. [2020-11-28 03:13:58,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:13:58,721 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 374 transitions. [2020-11-28 03:13:58,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-28 03:13:58,722 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:13:58,723 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] [2020-11-28 03:13:58,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-28 03:13:58,948 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]=== [2020-11-28 03:13:58,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:58,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1736909211, now seen corresponding path program 1 times [2020-11-28 03:13:58,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:58,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022848175] [2020-11-28 03:13:58,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:58,957 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:13:58,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265935491] [2020-11-28 03:13:58,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/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 [2020-11-28 03:13:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:13:59,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:13:59,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:59,081 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:59,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022848175] [2020-11-28 03:13:59,082 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:13:59,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265935491] [2020-11-28 03:13:59,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:13:59,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-28 03:13:59,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539878085] [2020-11-28 03:13:59,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:13:59,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:59,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:13:59,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:13:59,083 INFO L87 Difference]: Start difference. First operand 289 states and 374 transitions. Second operand 8 states. [2020-11-28 03:13:59,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:59,200 INFO L93 Difference]: Finished difference Result 448 states and 595 transitions. [2020-11-28 03:13:59,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 03:13:59,201 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-11-28 03:13:59,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:13:59,204 INFO L225 Difference]: With dead ends: 448 [2020-11-28 03:13:59,204 INFO L226 Difference]: Without dead ends: 291 [2020-11-28 03:13:59,206 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 [2020-11-28 03:13:59,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-11-28 03:13:59,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2020-11-28 03:13:59,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-11-28 03:13:59,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 374 transitions. [2020-11-28 03:13:59,241 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 374 transitions. Word has length 44 [2020-11-28 03:13:59,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:13:59,242 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 374 transitions. [2020-11-28 03:13:59,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:13:59,242 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 374 transitions. [2020-11-28 03:13:59,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-28 03:13:59,243 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:13:59,243 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] [2020-11-28 03:13:59,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:13:59,468 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]=== [2020-11-28 03:13:59,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:13:59,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1815469770, now seen corresponding path program 2 times [2020-11-28 03:13:59,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:13:59,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966118186] [2020-11-28 03:13:59,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:13:59,475 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:13:59,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934515984] [2020-11-28 03:13:59,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/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 [2020-11-28 03:13:59,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:13:59,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:13:59,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-28 03:13:59,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:13:59,670 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:13:59,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966118186] [2020-11-28 03:13:59,671 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:13:59,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934515984] [2020-11-28 03:13:59,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:13:59,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-28 03:13:59,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674016855] [2020-11-28 03:13:59,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 03:13:59,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:13:59,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 03:13:59,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:13:59,675 INFO L87 Difference]: Start difference. First operand 291 states and 374 transitions. Second operand 9 states. [2020-11-28 03:13:59,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:13:59,776 INFO L93 Difference]: Finished difference Result 345 states and 441 transitions. [2020-11-28 03:13:59,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 03:13:59,777 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-11-28 03:13:59,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:13:59,779 INFO L225 Difference]: With dead ends: 345 [2020-11-28 03:13:59,779 INFO L226 Difference]: Without dead ends: 146 [2020-11-28 03:13:59,780 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 [2020-11-28 03:13:59,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-11-28 03:13:59,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2020-11-28 03:13:59,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-11-28 03:13:59,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2020-11-28 03:13:59,798 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 46 [2020-11-28 03:13:59,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:13:59,799 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2020-11-28 03:13:59,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 03:13:59,799 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2020-11-28 03:13:59,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-28 03:13:59,800 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:13:59,800 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] [2020-11-28 03:14:00,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-28 03:14:00,024 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]=== [2020-11-28 03:14:00,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:14:00,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1624462181, now seen corresponding path program 1 times [2020-11-28 03:14:00,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:14:00,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318139559] [2020-11-28 03:14:00,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:14:00,038 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:14:00,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713154042] [2020-11-28 03:14:00,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/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 [2020-11-28 03:14:00,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:00,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 62 conjunts are in the unsatisfiable core [2020-11-28 03:14:00,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:14:00,413 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-11-28 03:14:00,415 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 03:14:00,415 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:14:00,628 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2020-11-28 03:14:00,872 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2020-11-28 03:14:01,235 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2020-11-28 03:14:01,323 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:14:01,439 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:14:01,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318139559] [2020-11-28 03:14:01,440 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:14:01,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713154042] [2020-11-28 03:14:01,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:14:01,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-11-28 03:14:01,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007890634] [2020-11-28 03:14:01,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-28 03:14:01,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:14:01,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-28 03:14:01,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:14:01,443 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand 14 states. [2020-11-28 03:14:02,573 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2020-11-28 03:14:10,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:14:10,096 INFO L93 Difference]: Finished difference Result 144 states and 158 transitions. [2020-11-28 03:14:10,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-28 03:14:10,097 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-11-28 03:14:10,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:14:10,098 INFO L225 Difference]: With dead ends: 144 [2020-11-28 03:14:10,098 INFO L226 Difference]: Without dead ends: 142 [2020-11-28 03:14:10,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-11-28 03:14:10,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-11-28 03:14:10,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2020-11-28 03:14:10,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-11-28 03:14:10,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 152 transitions. [2020-11-28 03:14:10,117 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 152 transitions. Word has length 46 [2020-11-28 03:14:10,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:14:10,118 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 152 transitions. [2020-11-28 03:14:10,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-28 03:14:10,118 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 152 transitions. [2020-11-28 03:14:10,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-28 03:14:10,119 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:14:10,119 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] [2020-11-28 03:14:10,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:14:10,332 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]=== [2020-11-28 03:14:10,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:14:10,333 INFO L82 PathProgramCache]: Analyzing trace with hash -63228902, now seen corresponding path program 3 times [2020-11-28 03:14:10,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:14:10,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551195405] [2020-11-28 03:14:10,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:14:10,340 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:14:10,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479453055] [2020-11-28 03:14:10,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/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 [2020-11-28 03:14:10,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-28 03:14:10,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:14:10,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-28 03:14:10,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:14:10,632 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-11-28 03:14:10,634 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 03:14:10,634 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:14:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-28 03:14:10,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551195405] [2020-11-28 03:14:10,701 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:14:10,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479453055] [2020-11-28 03:14:10,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:14:10,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-28 03:14:10,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703690594] [2020-11-28 03:14:10,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:14:10,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:14:10,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:14:10,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:14:10,706 INFO L87 Difference]: Start difference. First operand 138 states and 152 transitions. Second operand 5 states. [2020-11-28 03:14:11,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:14:11,018 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2020-11-28 03:14:11,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:14:11,019 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-11-28 03:14:11,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:14:11,020 INFO L225 Difference]: With dead ends: 138 [2020-11-28 03:14:11,020 INFO L226 Difference]: Without dead ends: 136 [2020-11-28 03:14:11,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:14:11,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-11-28 03:14:11,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-11-28 03:14:11,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-11-28 03:14:11,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 150 transitions. [2020-11-28 03:14:11,055 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 150 transitions. Word has length 46 [2020-11-28 03:14:11,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:14:11,055 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 150 transitions. [2020-11-28 03:14:11,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:14:11,055 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 150 transitions. [2020-11-28 03:14:11,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-28 03:14:11,056 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:14:11,056 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] [2020-11-28 03:14:11,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-28 03:14:11,257 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]=== [2020-11-28 03:14:11,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:14:11,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1369624974, now seen corresponding path program 2 times [2020-11-28 03:14:11,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:14:11,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137135687] [2020-11-28 03:14:11,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:14:11,275 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:14:11,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009053424] [2020-11-28 03:14:11,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/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 [2020-11-28 03:14:11,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:14:11,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:14:11,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 03:14:11,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:14:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-28 03:14:11,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137135687] [2020-11-28 03:14:11,430 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:14:11,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009053424] [2020-11-28 03:14:11,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:14:11,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:14:11,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556121720] [2020-11-28 03:14:11,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:14:11,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:14:11,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:14:11,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:14:11,434 INFO L87 Difference]: Start difference. First operand 136 states and 150 transitions. Second operand 5 states. [2020-11-28 03:14:12,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:14:12,291 INFO L93 Difference]: Finished difference Result 180 states and 198 transitions. [2020-11-28 03:14:12,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:14:12,292 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-11-28 03:14:12,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:14:12,294 INFO L225 Difference]: With dead ends: 180 [2020-11-28 03:14:12,294 INFO L226 Difference]: Without dead ends: 157 [2020-11-28 03:14:12,295 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 [2020-11-28 03:14:12,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-11-28 03:14:12,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 127. [2020-11-28 03:14:12,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-11-28 03:14:12,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 138 transitions. [2020-11-28 03:14:12,316 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 138 transitions. Word has length 48 [2020-11-28 03:14:12,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:14:12,316 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 138 transitions. [2020-11-28 03:14:12,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:14:12,316 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 138 transitions. [2020-11-28 03:14:12,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-28 03:14:12,317 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:14:12,317 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] [2020-11-28 03:14:12,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-28 03:14:12,532 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]=== [2020-11-28 03:14:12,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:14:12,533 INFO L82 PathProgramCache]: Analyzing trace with hash 361320236, now seen corresponding path program 2 times [2020-11-28 03:14:12,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:14:12,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774983473] [2020-11-28 03:14:12,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:14:12,543 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:14:12,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187748719] [2020-11-28 03:14:12,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/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 [2020-11-28 03:14:12,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:14:12,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:14:12,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 47 conjunts are in the unsatisfiable core [2020-11-28 03:14:12,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:14:13,126 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-11-28 03:14:13,129 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 03:14:13,129 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:14:13,437 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-11-28 03:14:13,631 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:14:13,767 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:14:13,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774983473] [2020-11-28 03:14:13,768 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:14:13,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187748719] [2020-11-28 03:14:13,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:14:13,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-28 03:14:13,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321211580] [2020-11-28 03:14:13,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 03:14:13,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:14:13,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 03:14:13,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:14:13,770 INFO L87 Difference]: Start difference. First operand 127 states and 138 transitions. Second operand 13 states. [2020-11-28 03:14:16,402 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-11-28 03:14:17,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:14:17,358 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2020-11-28 03:14:17,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-28 03:14:17,359 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-11-28 03:14:17,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:14:17,361 INFO L225 Difference]: With dead ends: 135 [2020-11-28 03:14:17,361 INFO L226 Difference]: Without dead ends: 131 [2020-11-28 03:14:17,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2020-11-28 03:14:17,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-11-28 03:14:17,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2020-11-28 03:14:17,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-11-28 03:14:17,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 139 transitions. [2020-11-28 03:14:17,381 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 139 transitions. Word has length 49 [2020-11-28 03:14:17,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:14:17,382 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 139 transitions. [2020-11-28 03:14:17,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 03:14:17,382 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 139 transitions. [2020-11-28 03:14:17,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-28 03:14:17,383 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:14:17,383 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] [2020-11-28 03:14:17,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-28 03:14:17,596 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]=== [2020-11-28 03:14:17,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:14:17,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1010714709, now seen corresponding path program 2 times [2020-11-28 03:14:17,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:14:17,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356424209] [2020-11-28 03:14:17,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:14:17,608 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:14:17,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112848296] [2020-11-28 03:14:17,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/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 [2020-11-28 03:14:17,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:14:17,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-11-28 03:14:17,730 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:14:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:14:17,775 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:14:17,881 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:14:17,881 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 03:14:18,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-28 03:14:18,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:14:18 BoogieIcfgContainer [2020-11-28 03:14:18,177 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:14:18,178 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:14:18,178 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:14:18,192 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:14:18,192 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:13:42" (3/4) ... [2020-11-28 03:14:18,194 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 03:14:18,266 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a11523cc-349c-4c61-929f-015621ec9f6a/bin/uautomizer/witness.graphml [2020-11-28 03:14:18,267 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:14:18,268 INFO L168 Benchmark]: Toolchain (without parser) took 36888.65 ms. Allocated memory was 113.2 MB in the beginning and 226.5 MB in the end (delta: 113.2 MB). Free memory was 88.6 MB in the beginning and 85.0 MB in the end (delta: 3.6 MB). Peak memory consumption was 115.6 MB. Max. memory is 16.1 GB. [2020-11-28 03:14:18,269 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 113.2 MB. Free memory is still 70.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:14:18,269 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.82 ms. Allocated memory is still 113.2 MB. Free memory was 88.6 MB in the beginning and 89.3 MB in the end (delta: -681.8 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:14:18,270 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.60 ms. Allocated memory is still 113.2 MB. Free memory was 89.3 MB in the beginning and 87.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:14:18,270 INFO L168 Benchmark]: Boogie Preprocessor took 25.53 ms. Allocated memory is still 113.2 MB. Free memory was 87.4 MB in the beginning and 86.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:14:18,271 INFO L168 Benchmark]: RCFGBuilder took 563.16 ms. Allocated memory is still 113.2 MB. Free memory was 86.0 MB in the beginning and 68.2 MB in the end (delta: 17.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-28 03:14:18,271 INFO L168 Benchmark]: TraceAbstraction took 35895.70 ms. Allocated memory was 113.2 MB in the beginning and 226.5 MB in the end (delta: 113.2 MB). Free memory was 67.7 MB in the beginning and 90.2 MB in the end (delta: -22.6 MB). Peak memory consumption was 92.0 MB. Max. memory is 16.1 GB. [2020-11-28 03:14:18,272 INFO L168 Benchmark]: Witness Printer took 89.39 ms. Allocated memory is still 226.5 MB. Free memory was 90.2 MB in the beginning and 85.0 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 03:14:18,274 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 is still 70.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 268.82 ms. Allocated memory is still 113.2 MB. Free memory was 88.6 MB in the beginning and 89.3 MB in the end (delta: -681.8 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.60 ms. Allocated memory is still 113.2 MB. Free memory was 89.3 MB in the beginning and 87.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.53 ms. Allocated memory is still 113.2 MB. Free memory was 87.4 MB in the beginning and 86.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 563.16 ms. Allocated memory is still 113.2 MB. Free memory was 86.0 MB in the beginning and 68.2 MB in the end (delta: 17.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 35895.70 ms. Allocated memory was 113.2 MB in the beginning and 226.5 MB in the end (delta: 113.2 MB). Free memory was 67.7 MB in the beginning and 90.2 MB in the end (delta: -22.6 MB). Peak memory consumption was 92.0 MB. Max. memory is 16.1 GB. * Witness Printer took 89.39 ms. Allocated memory is still 226.5 MB. Free memory was 90.2 MB in the beginning and 85.0 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L18] int counter = 0; VAL [counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s, c, k, xy, yy; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) VAL [counter=0] [L8] COND FALSE !(!cond) VAL [counter=0] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L33] c = 0 [L34] k = 0 [L35] xy = (long long) x * y [L36] yy = (long long) y * y [L8] COND FALSE !(!cond) VAL [counter=0] [L8] COND FALSE !(!cond) VAL [counter=0] [L40] EXPR counter++ VAL [counter=1] [L40] COND TRUE counter++<5 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [counter=1] [L46] EXPR counter++ VAL [counter=2] [L46] COND TRUE counter++<5 [L11] COND FALSE !(!(cond)) VAL [counter=2] [L11] COND FALSE !(!(cond)) VAL [counter=2] [L11] COND FALSE !(!(cond)) VAL [counter=2] [L11] COND FALSE !(!(cond)) VAL [counter=2] [L51] COND TRUE !(c >= b) VAL [counter=2] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [counter=2] [L40] EXPR counter++ VAL [counter=3] [L40] COND TRUE counter++<5 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [counter=3] [L46] EXPR counter++ VAL [counter=4] [L46] COND TRUE counter++<5 [L11] COND FALSE !(!(cond)) VAL [counter=4] [L11] COND FALSE !(!(cond)) VAL [counter=4] [L11] COND FALSE !(!(cond)) VAL [counter=4] [L11] COND FALSE !(!(cond)) VAL [counter=4] [L51] COND FALSE !(!(c >= b)) [L53] c = c - b [L54] k = k + 1 VAL [counter=4] [L46] EXPR counter++ VAL [counter=5] [L46] COND TRUE counter++<5 [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L51] COND TRUE !(c >= b) VAL [counter=5] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [counter=5] [L40] EXPR counter++ VAL [counter=6] [L40] COND FALSE !(counter++<5) [L11] COND TRUE !(cond) VAL [counter=6] [L4] __assert_fail("0", "egcd2-ll.c", 4, "reach_error") VAL [counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 43 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 35.7s, OverallIterations: 29, TraceHistogramMax: 4, AutomataDifference: 20.1s, 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, 14.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 941 GetRequests, 701 SyntacticMatches, 5 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 8.4s 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: 0.4s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 5.9s 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...