./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/eureka_01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/eureka_01-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/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 a0175e46c372a5de5baa3319396a86b21fa2d79f ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-69874e2 [2020-12-01 15:26:10,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 15:26:10,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 15:26:10,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 15:26:10,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 15:26:10,579 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 15:26:10,582 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 15:26:10,585 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 15:26:10,587 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 15:26:10,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 15:26:10,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 15:26:10,593 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 15:26:10,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 15:26:10,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 15:26:10,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 15:26:10,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 15:26:10,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 15:26:10,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 15:26:10,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 15:26:10,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 15:26:10,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 15:26:10,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 15:26:10,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 15:26:10,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 15:26:10,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 15:26:10,640 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 15:26:10,641 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 15:26:10,642 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 15:26:10,645 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 15:26:10,646 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 15:26:10,647 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 15:26:10,649 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 15:26:10,651 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 15:26:10,653 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 15:26:10,654 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 15:26:10,655 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 15:26:10,656 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 15:26:10,656 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 15:26:10,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 15:26:10,659 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 15:26:10,660 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 15:26:10,663 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-01 15:26:10,707 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 15:26:10,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 15:26:10,709 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 15:26:10,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 15:26:10,710 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 15:26:10,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 15:26:10,710 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 15:26:10,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 15:26:10,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 15:26:10,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 15:26:10,711 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 15:26:10,712 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 15:26:10,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 15:26:10,712 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 15:26:10,713 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 15:26:10,713 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 15:26:10,713 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 15:26:10,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 15:26:10,714 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 15:26:10,714 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 15:26:10,714 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 15:26:10,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 15:26:10,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 15:26:10,715 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 15:26:10,715 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 15:26:10,716 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 15:26:10,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 15:26:10,716 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 15:26:10,716 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 15:26:10,717 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_9617f307-6325-4d3c-a329-0d6ec257909b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0175e46c372a5de5baa3319396a86b21fa2d79f [2020-12-01 15:26:11,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 15:26:11,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 15:26:11,080 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 15:26:11,081 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 15:26:11,083 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 15:26:11,084 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/bin/uautomizer/../../sv-benchmarks/c/loops/eureka_01-1.c [2020-12-01 15:26:11,172 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/bin/uautomizer/data/a63f015bb/0740446380b34d958fccbf24975826d8/FLAG99d288474 [2020-12-01 15:26:11,783 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 15:26:11,784 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/sv-benchmarks/c/loops/eureka_01-1.c [2020-12-01 15:26:11,793 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/bin/uautomizer/data/a63f015bb/0740446380b34d958fccbf24975826d8/FLAG99d288474 [2020-12-01 15:26:12,109 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/bin/uautomizer/data/a63f015bb/0740446380b34d958fccbf24975826d8 [2020-12-01 15:26:12,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 15:26:12,113 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 15:26:12,130 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 15:26:12,131 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 15:26:12,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 15:26:12,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:26:12" (1/1) ... [2020-12-01 15:26:12,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eaa9820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:12, skipping insertion in model container [2020-12-01 15:26:12,139 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:26:12" (1/1) ... [2020-12-01 15:26:12,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 15:26:12,170 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 15:26:12,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:26:12,435 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 15:26:12,479 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:26:12,496 INFO L208 MainTranslator]: Completed translation [2020-12-01 15:26:12,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:12 WrapperNode [2020-12-01 15:26:12,497 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 15:26:12,498 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 15:26:12,498 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 15:26:12,499 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 15:26:12,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:12" (1/1) ... [2020-12-01 15:26:12,518 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:12" (1/1) ... [2020-12-01 15:26:12,549 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 15:26:12,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 15:26:12,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 15:26:12,551 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 15:26:12,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:12" (1/1) ... [2020-12-01 15:26:12,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:12" (1/1) ... [2020-12-01 15:26:12,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:12" (1/1) ... [2020-12-01 15:26:12,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:12" (1/1) ... [2020-12-01 15:26:12,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:12" (1/1) ... [2020-12-01 15:26:12,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:12" (1/1) ... [2020-12-01 15:26:12,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:12" (1/1) ... [2020-12-01 15:26:12,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 15:26:12,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 15:26:12,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 15:26:12,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 15:26:12,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 15:26:12,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 15:26:12,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 15:26:12,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-01 15:26:12,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 15:26:12,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 15:26:12,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-01 15:26:12,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-01 15:26:13,261 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 15:26:13,261 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-01 15:26:13,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:26:13 BoogieIcfgContainer [2020-12-01 15:26:13,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 15:26:13,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 15:26:13,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 15:26:13,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 15:26:13,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 03:26:12" (1/3) ... [2020-12-01 15:26:13,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b8672b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:26:13, skipping insertion in model container [2020-12-01 15:26:13,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:26:12" (2/3) ... [2020-12-01 15:26:13,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b8672b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:26:13, skipping insertion in model container [2020-12-01 15:26:13,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:26:13" (3/3) ... [2020-12-01 15:26:13,274 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_01-1.c [2020-12-01 15:26:13,291 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 15:26:13,295 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-01 15:26:13,316 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-01 15:26:13,372 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 15:26:13,373 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-01 15:26:13,373 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 15:26:13,373 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 15:26:13,373 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 15:26:13,374 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 15:26:13,374 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 15:26:13,374 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 15:26:13,390 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-12-01 15:26:13,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-01 15:26:13,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:26:13,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:26:13,398 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:26:13,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:26:13,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1963003136, now seen corresponding path program 1 times [2020-12-01 15:26:13,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:26:13,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852089937] [2020-12-01 15:26:13,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:26:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:13,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:26:13,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852089937] [2020-12-01 15:26:13,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:26:13,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-01 15:26:13,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113014438] [2020-12-01 15:26:13,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-01 15:26:13,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:26:13,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-01 15:26:13,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-01 15:26:13,842 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-12-01 15:26:14,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:26:14,051 INFO L93 Difference]: Finished difference Result 90 states and 136 transitions. [2020-12-01 15:26:14,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-01 15:26:14,053 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-01 15:26:14,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:26:14,080 INFO L225 Difference]: With dead ends: 90 [2020-12-01 15:26:14,080 INFO L226 Difference]: Without dead ends: 42 [2020-12-01 15:26:14,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-01 15:26:14,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-01 15:26:14,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 26. [2020-12-01 15:26:14,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-01 15:26:14,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-12-01 15:26:14,119 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 13 [2020-12-01 15:26:14,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:26:14,119 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-12-01 15:26:14,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-01 15:26:14,119 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-12-01 15:26:14,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-01 15:26:14,120 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:26:14,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:26:14,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-01 15:26:14,121 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:26:14,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:26:14,122 INFO L82 PathProgramCache]: Analyzing trace with hash 629591390, now seen corresponding path program 1 times [2020-12-01 15:26:14,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:26:14,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418962638] [2020-12-01 15:26:14,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:26:14,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 15:26:14,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418962638] [2020-12-01 15:26:14,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506494097] [2020-12-01 15:26:14,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:26:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:14,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-01 15:26:14,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:26:14,700 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2020-12-01 15:26:14,703 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:26:14,724 INFO L625 ElimStorePlain]: treesize reduction 7, result has 72.0 percent of original size [2020-12-01 15:26:14,729 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-01 15:26:14,730 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2020-12-01 15:26:14,835 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:26:14,847 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:26:14,855 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:26:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 15:26:14,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:26:14,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-01 15:26:14,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647064915] [2020-12-01 15:26:14,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-01 15:26:14,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:26:14,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-01 15:26:14,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-01 15:26:14,886 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 7 states. [2020-12-01 15:26:15,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:26:15,087 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2020-12-01 15:26:15,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-01 15:26:15,089 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-01 15:26:15,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:26:15,093 INFO L225 Difference]: With dead ends: 70 [2020-12-01 15:26:15,094 INFO L226 Difference]: Without dead ends: 68 [2020-12-01 15:26:15,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:26:15,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-01 15:26:15,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 43. [2020-12-01 15:26:15,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-01 15:26:15,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2020-12-01 15:26:15,118 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 19 [2020-12-01 15:26:15,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:26:15,119 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2020-12-01 15:26:15,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-01 15:26:15,120 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2020-12-01 15:26:15,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-01 15:26:15,125 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:26:15,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:26:15,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-01 15:26:15,339 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:26:15,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:26:15,340 INFO L82 PathProgramCache]: Analyzing trace with hash -381525860, now seen corresponding path program 1 times [2020-12-01 15:26:15,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:26:15,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607441239] [2020-12-01 15:26:15,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:26:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:15,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 15:26:15,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607441239] [2020-12-01 15:26:15,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:26:15,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:26:15,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345434962] [2020-12-01 15:26:15,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:26:15,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:26:15,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:26:15,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:26:15,427 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 3 states. [2020-12-01 15:26:15,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:26:15,473 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2020-12-01 15:26:15,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:26:15,474 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-01 15:26:15,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:26:15,477 INFO L225 Difference]: With dead ends: 66 [2020-12-01 15:26:15,478 INFO L226 Difference]: Without dead ends: 45 [2020-12-01 15:26:15,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:26:15,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-01 15:26:15,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-12-01 15:26:15,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-01 15:26:15,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-12-01 15:26:15,493 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 19 [2020-12-01 15:26:15,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:26:15,494 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-12-01 15:26:15,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:26:15,494 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-12-01 15:26:15,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-01 15:26:15,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:26:15,496 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:26:15,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-01 15:26:15,496 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:26:15,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:26:15,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1960843935, now seen corresponding path program 1 times [2020-12-01 15:26:15,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:26:15,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219183378] [2020-12-01 15:26:15,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:26:15,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 15:26:15,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219183378] [2020-12-01 15:26:15,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548374885] [2020-12-01 15:26:15,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:26:15,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:15,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-01 15:26:15,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:26:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 15:26:15,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:26:15,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2020-12-01 15:26:15,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017051415] [2020-12-01 15:26:15,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-01 15:26:15,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:26:15,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-01 15:26:15,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-01 15:26:15,881 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 8 states. [2020-12-01 15:26:16,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:26:16,060 INFO L93 Difference]: Finished difference Result 114 states and 146 transitions. [2020-12-01 15:26:16,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-01 15:26:16,061 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-12-01 15:26:16,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:26:16,062 INFO L225 Difference]: With dead ends: 114 [2020-12-01 15:26:16,063 INFO L226 Difference]: Without dead ends: 86 [2020-12-01 15:26:16,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:26:16,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-01 15:26:16,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2020-12-01 15:26:16,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-01 15:26:16,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-12-01 15:26:16,082 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 22 [2020-12-01 15:26:16,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:26:16,083 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-12-01 15:26:16,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-01 15:26:16,083 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-12-01 15:26:16,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-01 15:26:16,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:26:16,085 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] [2020-12-01 15:26:16,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:26:16,307 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:26:16,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:26:16,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1926841972, now seen corresponding path program 1 times [2020-12-01 15:26:16,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:26:16,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978821] [2020-12-01 15:26:16,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:26:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:26:16,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978821] [2020-12-01 15:26:16,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053003576] [2020-12-01 15:26:16,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:26:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:16,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-01 15:26:16,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:26:16,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:26:16,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:26:16,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-01 15:26:16,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78567542] [2020-12-01 15:26:16,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-01 15:26:16,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:26:16,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-01 15:26:16,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:26:16,665 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand 10 states. [2020-12-01 15:26:16,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:26:16,947 INFO L93 Difference]: Finished difference Result 181 states and 231 transitions. [2020-12-01 15:26:16,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-01 15:26:16,948 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-12-01 15:26:16,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:26:16,953 INFO L225 Difference]: With dead ends: 181 [2020-12-01 15:26:16,954 INFO L226 Difference]: Without dead ends: 159 [2020-12-01 15:26:16,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-12-01 15:26:16,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-12-01 15:26:16,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 75. [2020-12-01 15:26:16,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-01 15:26:16,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2020-12-01 15:26:16,985 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 22 [2020-12-01 15:26:16,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:26:16,990 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2020-12-01 15:26:16,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-01 15:26:16,991 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2020-12-01 15:26:16,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-01 15:26:16,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:26:16,999 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] [2020-12-01 15:26:17,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:26:17,227 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:26:17,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:26:17,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1293432562, now seen corresponding path program 1 times [2020-12-01 15:26:17,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:26:17,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432133240] [2020-12-01 15:26:17,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:26:17,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 15:26:17,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432133240] [2020-12-01 15:26:17,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428526191] [2020-12-01 15:26:17,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:26:17,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:17,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-01 15:26:17,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:26:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 15:26:17,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:26:17,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-01 15:26:17,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663094853] [2020-12-01 15:26:17,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-01 15:26:17,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:26:17,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-01 15:26:17,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:26:17,573 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand 10 states. [2020-12-01 15:26:17,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:26:17,771 INFO L93 Difference]: Finished difference Result 206 states and 263 transitions. [2020-12-01 15:26:17,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-01 15:26:17,771 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-12-01 15:26:17,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:26:17,773 INFO L225 Difference]: With dead ends: 206 [2020-12-01 15:26:17,773 INFO L226 Difference]: Without dead ends: 146 [2020-12-01 15:26:17,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-01 15:26:17,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-01 15:26:17,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 92. [2020-12-01 15:26:17,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-01 15:26:17,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 119 transitions. [2020-12-01 15:26:17,806 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 119 transitions. Word has length 23 [2020-12-01 15:26:17,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:26:17,807 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 119 transitions. [2020-12-01 15:26:17,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-01 15:26:17,807 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 119 transitions. [2020-12-01 15:26:17,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-01 15:26:17,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:26:17,808 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, 1, 1, 1] [2020-12-01 15:26:18,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:26:18,027 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:26:18,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:26:18,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1741027445, now seen corresponding path program 1 times [2020-12-01 15:26:18,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:26:18,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682447752] [2020-12-01 15:26:18,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:26:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:18,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 15:26:18,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682447752] [2020-12-01 15:26:18,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751171755] [2020-12-01 15:26:18,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:26:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:18,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-01 15:26:18,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:26:18,719 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2020-12-01 15:26:18,721 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:26:18,738 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:26:18,743 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-01 15:26:18,743 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:32 [2020-12-01 15:26:18,851 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:26:18,852 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 40 [2020-12-01 15:26:18,856 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:26:18,900 INFO L625 ElimStorePlain]: treesize reduction 24, result has 57.1 percent of original size [2020-12-01 15:26:18,903 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-01 15:26:18,904 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:32 [2020-12-01 15:26:19,181 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:26:19,181 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 121 [2020-12-01 15:26:19,190 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-01 15:26:19,191 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-01 15:26:19,196 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 15:26:19,203 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:26:19,264 INFO L625 ElimStorePlain]: treesize reduction 51, result has 50.5 percent of original size [2020-12-01 15:26:19,268 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-01 15:26:19,268 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:54, output treesize:52 [2020-12-01 15:26:19,704 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:26:19,713 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-01 15:26:19,721 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-01 15:26:19,741 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-01 15:26:19,746 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-01 15:26:19,755 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-01 15:26:19,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:26:19,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:26:19,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-12-01 15:26:19,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286940998] [2020-12-01 15:26:19,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-01 15:26:19,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:26:19,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-01 15:26:19,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-12-01 15:26:19,798 INFO L87 Difference]: Start difference. First operand 92 states and 119 transitions. Second operand 20 states. [2020-12-01 15:26:22,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:26:22,701 INFO L93 Difference]: Finished difference Result 252 states and 308 transitions. [2020-12-01 15:26:22,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-01 15:26:22,702 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 25 [2020-12-01 15:26:22,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:26:22,705 INFO L225 Difference]: With dead ends: 252 [2020-12-01 15:26:22,706 INFO L226 Difference]: Without dead ends: 230 [2020-12-01 15:26:22,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=622, Invalid=2240, Unknown=0, NotChecked=0, Total=2862 [2020-12-01 15:26:22,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-12-01 15:26:22,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 96. [2020-12-01 15:26:22,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-01 15:26:22,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 126 transitions. [2020-12-01 15:26:22,731 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 126 transitions. Word has length 25 [2020-12-01 15:26:22,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:26:22,734 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 126 transitions. [2020-12-01 15:26:22,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-01 15:26:22,734 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 126 transitions. [2020-12-01 15:26:22,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-01 15:26:22,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:26:22,737 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:26:22,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-01 15:26:22,963 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:26:22,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:26:22,964 INFO L82 PathProgramCache]: Analyzing trace with hash -858936254, now seen corresponding path program 2 times [2020-12-01 15:26:22,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:26:22,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121222800] [2020-12-01 15:26:22,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:26:22,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:23,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-01 15:26:23,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121222800] [2020-12-01 15:26:23,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507697681] [2020-12-01 15:26:23,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:26:23,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:26:23,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:26:23,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-01 15:26:23,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:26:23,249 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-01 15:26:23,249 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:26:23,256 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:26:23,257 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-01 15:26:23,257 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-12-01 15:26:23,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:23,319 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2020-12-01 15:26:23,320 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:26:23,330 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:26:23,332 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-01 15:26:23,333 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:18 [2020-12-01 15:26:23,368 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:26:23,371 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:26:23,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-01 15:26:23,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:26:23,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-12-01 15:26:23,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515625235] [2020-12-01 15:26:23,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-01 15:26:23,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:26:23,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-01 15:26:23,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:26:23,391 INFO L87 Difference]: Start difference. First operand 96 states and 126 transitions. Second operand 10 states. [2020-12-01 15:26:23,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:26:23,701 INFO L93 Difference]: Finished difference Result 159 states and 205 transitions. [2020-12-01 15:26:23,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-01 15:26:23,702 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-12-01 15:26:23,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:26:23,705 INFO L225 Difference]: With dead ends: 159 [2020-12-01 15:26:23,705 INFO L226 Difference]: Without dead ends: 157 [2020-12-01 15:26:23,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-12-01 15:26:23,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-01 15:26:23,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 106. [2020-12-01 15:26:23,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-01 15:26:23,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2020-12-01 15:26:23,732 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 141 transitions. Word has length 25 [2020-12-01 15:26:23,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:26:23,732 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 141 transitions. [2020-12-01 15:26:23,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-01 15:26:23,733 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 141 transitions. [2020-12-01 15:26:23,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-01 15:26:23,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:26:23,738 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-01 15:26:23,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:26:23,967 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:26:23,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:26:23,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1096380170, now seen corresponding path program 2 times [2020-12-01 15:26:23,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:26:23,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976825263] [2020-12-01 15:26:23,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:26:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:24,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 15:26:24,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976825263] [2020-12-01 15:26:24,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342737714] [2020-12-01 15:26:24,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:26:24,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:26:24,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:26:24,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-01 15:26:24,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:26:24,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 15:26:24,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:26:24,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-01 15:26:24,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113145009] [2020-12-01 15:26:24,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-01 15:26:24,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:26:24,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-01 15:26:24,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:26:24,259 INFO L87 Difference]: Start difference. First operand 106 states and 141 transitions. Second operand 10 states. [2020-12-01 15:26:24,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:26:24,526 INFO L93 Difference]: Finished difference Result 216 states and 272 transitions. [2020-12-01 15:26:24,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-01 15:26:24,527 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-12-01 15:26:24,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:26:24,529 INFO L225 Difference]: With dead ends: 216 [2020-12-01 15:26:24,529 INFO L226 Difference]: Without dead ends: 203 [2020-12-01 15:26:24,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-12-01 15:26:24,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-12-01 15:26:24,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 148. [2020-12-01 15:26:24,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-12-01 15:26:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 196 transitions. [2020-12-01 15:26:24,567 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 196 transitions. Word has length 28 [2020-12-01 15:26:24,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:26:24,567 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 196 transitions. [2020-12-01 15:26:24,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-01 15:26:24,568 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 196 transitions. [2020-12-01 15:26:24,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-01 15:26:24,568 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:26:24,569 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] [2020-12-01 15:26:24,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:26:24,786 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:26:24,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:26:24,786 INFO L82 PathProgramCache]: Analyzing trace with hash 219879636, now seen corresponding path program 2 times [2020-12-01 15:26:24,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:26:24,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114846691] [2020-12-01 15:26:24,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:26:24,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:24,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-01 15:26:24,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114846691] [2020-12-01 15:26:24,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850488246] [2020-12-01 15:26:24,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:26:24,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:26:24,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:26:24,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-01 15:26:24,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:26:24,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-01 15:26:25,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:26:25,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2020-12-01 15:26:25,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136163075] [2020-12-01 15:26:25,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 15:26:25,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:26:25,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 15:26:25,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-01 15:26:25,002 INFO L87 Difference]: Start difference. First operand 148 states and 196 transitions. Second operand 4 states. [2020-12-01 15:26:25,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:26:25,085 INFO L93 Difference]: Finished difference Result 246 states and 322 transitions. [2020-12-01 15:26:25,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 15:26:25,085 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-12-01 15:26:25,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:26:25,087 INFO L225 Difference]: With dead ends: 246 [2020-12-01 15:26:25,087 INFO L226 Difference]: Without dead ends: 129 [2020-12-01 15:26:25,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-01 15:26:25,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-01 15:26:25,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 114. [2020-12-01 15:26:25,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-12-01 15:26:25,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 145 transitions. [2020-12-01 15:26:25,111 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 145 transitions. Word has length 29 [2020-12-01 15:26:25,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:26:25,111 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 145 transitions. [2020-12-01 15:26:25,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 15:26:25,112 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 145 transitions. [2020-12-01 15:26:25,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-01 15:26:25,112 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:26:25,113 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:26:25,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-01 15:26:25,339 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:26:25,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:26:25,340 INFO L82 PathProgramCache]: Analyzing trace with hash 642581462, now seen corresponding path program 1 times [2020-12-01 15:26:25,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:26:25,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167515984] [2020-12-01 15:26:25,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:26:25,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:25,533 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-01 15:26:25,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167515984] [2020-12-01 15:26:25,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702926258] [2020-12-01 15:26:25,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:26:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:25,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-01 15:26:25,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:26:25,674 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-01 15:26:25,675 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:26:25,680 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:26:25,682 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-01 15:26:25,682 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2020-12-01 15:26:25,764 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:26:25,766 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:26:25,776 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:26:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-01 15:26:25,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:26:25,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-01 15:26:25,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693165196] [2020-12-01 15:26:25,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-01 15:26:25,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:26:25,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-01 15:26:25,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-12-01 15:26:25,798 INFO L87 Difference]: Start difference. First operand 114 states and 145 transitions. Second operand 15 states. [2020-12-01 15:26:26,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:26:26,358 INFO L93 Difference]: Finished difference Result 183 states and 226 transitions. [2020-12-01 15:26:26,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-01 15:26:26,359 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-12-01 15:26:26,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:26:26,361 INFO L225 Difference]: With dead ends: 183 [2020-12-01 15:26:26,361 INFO L226 Difference]: Without dead ends: 181 [2020-12-01 15:26:26,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2020-12-01 15:26:26,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-12-01 15:26:26,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-12-01 15:26:26,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-01 15:26:26,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 149 transitions. [2020-12-01 15:26:26,383 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 149 transitions. Word has length 29 [2020-12-01 15:26:26,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:26:26,384 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 149 transitions. [2020-12-01 15:26:26,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-01 15:26:26,384 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 149 transitions. [2020-12-01 15:26:26,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-01 15:26:26,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:26:26,385 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:26:26,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:26:26,599 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:26:26,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:26:26,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1240772930, now seen corresponding path program 3 times [2020-12-01 15:26:26,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:26:26,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817803905] [2020-12-01 15:26:26,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:26:26,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 15:26:27,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817803905] [2020-12-01 15:26:27,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759659620] [2020-12-01 15:26:27,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:26:27,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-01 15:26:27,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:26:27,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-01 15:26:27,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:26:27,481 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2020-12-01 15:26:27,491 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:26:27,514 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:26:27,515 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-01 15:26:27,516 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:73 [2020-12-01 15:26:27,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:27,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:27,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:27,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:27,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:27,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:27,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:27,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:27,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:27,641 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:26:27,641 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 60 treesize of output 82 [2020-12-01 15:26:27,643 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:26:27,695 INFO L625 ElimStorePlain]: treesize reduction 20, result has 78.5 percent of original size [2020-12-01 15:26:27,697 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-01 15:26:27,697 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:81, output treesize:73 [2020-12-01 15:26:27,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:27,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:27,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:28,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:28,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:28,011 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-01 15:26:28,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:28,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:28,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:28,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:28,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:28,305 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2020-12-01 15:26:28,306 INFO L348 Elim1Store]: treesize reduction 16, result has 94.7 percent of original size [2020-12-01 15:26:28,306 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 82 treesize of output 335 [2020-12-01 15:26:28,312 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:26:28,325 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:26:28,393 INFO L625 ElimStorePlain]: treesize reduction 41, result has 68.5 percent of original size [2020-12-01 15:26:28,395 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-01 15:26:28,395 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:89 [2020-12-01 15:26:28,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:28,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:28,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:28,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:29,169 WARN L197 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 119 [2020-12-01 15:26:29,170 INFO L348 Elim1Store]: treesize reduction 14, result has 96.6 percent of original size [2020-12-01 15:26:29,170 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 16 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 38 case distinctions, treesize of input 87 treesize of output 452 [2020-12-01 15:26:29,192 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-01 15:26:29,193 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 15:26:29,194 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-01 15:26:29,199 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-01 15:26:29,200 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-12-01 15:26:29,201 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-01 15:26:29,202 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 15:26:29,203 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 15:26:29,204 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:26:29,204 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-01 15:26:29,207 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 15:26:29,208 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:26:29,218 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:26:29,323 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2020-12-01 15:26:29,324 INFO L625 ElimStorePlain]: treesize reduction 90, result has 54.5 percent of original size [2020-12-01 15:26:29,326 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 15:26:29,328 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-01 15:26:29,332 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-12-01 15:26:29,333 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:104, output treesize:108 [2020-12-01 15:26:29,336 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 15:26:29,337 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-01 15:26:29,890 WARN L197 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-01 15:26:29,925 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 15:26:29,928 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-01 15:26:31,189 WARN L197 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 73 [2020-12-01 15:26:31,204 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:26:31,896 WARN L197 SmtUtils]: Spent 551.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-12-01 15:26:33,012 WARN L197 SmtUtils]: Spent 896.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-12-01 15:26:33,090 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:26:33,905 WARN L197 SmtUtils]: Spent 692.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-12-01 15:26:33,925 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:26:34,308 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:26:34,310 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-01 15:26:34,314 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2020-12-01 15:26:34,323 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-01 15:26:34,326 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2020-12-01 15:26:34,330 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 14 disjuncts [2020-12-01 15:26:34,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:26:34,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:26:34,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2020-12-01 15:26:34,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025973002] [2020-12-01 15:26:34,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-01 15:26:34,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:26:34,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-01 15:26:34,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2020-12-01 15:26:34,408 INFO L87 Difference]: Start difference. First operand 118 states and 149 transitions. Second operand 29 states. [2020-12-01 15:26:35,343 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2020-12-01 15:26:35,537 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 61 [2020-12-01 15:26:36,090 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 74 [2020-12-01 15:26:36,355 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 75 [2020-12-01 15:26:36,694 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 78 [2020-12-01 15:26:37,299 WARN L197 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 82 [2020-12-01 15:26:41,537 WARN L197 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 107 DAG size of output: 87 [2020-12-01 15:26:42,035 WARN L197 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 83 [2020-12-01 15:26:43,835 WARN L197 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 84 [2020-12-01 15:26:44,162 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2020-12-01 15:26:44,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:26:44,164 INFO L93 Difference]: Finished difference Result 186 states and 228 transitions. [2020-12-01 15:26:44,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-01 15:26:44,164 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 31 [2020-12-01 15:26:44,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:26:44,165 INFO L225 Difference]: With dead ends: 186 [2020-12-01 15:26:44,165 INFO L226 Difference]: Without dead ends: 141 [2020-12-01 15:26:44,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=515, Invalid=2137, Unknown=0, NotChecked=0, Total=2652 [2020-12-01 15:26:44,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-01 15:26:44,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 121. [2020-12-01 15:26:44,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-01 15:26:44,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 153 transitions. [2020-12-01 15:26:44,188 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 153 transitions. Word has length 31 [2020-12-01 15:26:44,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:26:44,189 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 153 transitions. [2020-12-01 15:26:44,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-01 15:26:44,189 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 153 transitions. [2020-12-01 15:26:44,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-01 15:26:44,190 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:26:44,190 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, 1] [2020-12-01 15:26:44,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:26:44,409 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:26:44,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:26:44,410 INFO L82 PathProgramCache]: Analyzing trace with hash -956621735, now seen corresponding path program 1 times [2020-12-01 15:26:44,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:26:44,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132945722] [2020-12-01 15:26:44,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:26:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:44,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-01 15:26:44,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132945722] [2020-12-01 15:26:44,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:26:44,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-01 15:26:44,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280633821] [2020-12-01 15:26:44,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-01 15:26:44,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:26:44,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-01 15:26:44,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-01 15:26:44,472 INFO L87 Difference]: Start difference. First operand 121 states and 153 transitions. Second operand 5 states. [2020-12-01 15:26:44,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:26:44,527 INFO L93 Difference]: Finished difference Result 197 states and 246 transitions. [2020-12-01 15:26:44,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 15:26:44,528 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-12-01 15:26:44,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:26:44,530 INFO L225 Difference]: With dead ends: 197 [2020-12-01 15:26:44,530 INFO L226 Difference]: Without dead ends: 141 [2020-12-01 15:26:44,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-01 15:26:44,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-01 15:26:44,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 121. [2020-12-01 15:26:44,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-01 15:26:44,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 152 transitions. [2020-12-01 15:26:44,564 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 152 transitions. Word has length 31 [2020-12-01 15:26:44,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:26:44,564 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 152 transitions. [2020-12-01 15:26:44,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-01 15:26:44,565 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 152 transitions. [2020-12-01 15:26:44,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-01 15:26:44,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:26:44,565 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:26:44,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-01 15:26:44,566 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:26:44,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:26:44,566 INFO L82 PathProgramCache]: Analyzing trace with hash 2054058346, now seen corresponding path program 2 times [2020-12-01 15:26:44,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:26:44,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125819298] [2020-12-01 15:26:44,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:26:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-01 15:26:44,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125819298] [2020-12-01 15:26:44,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045126124] [2020-12-01 15:26:44,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:26:44,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:26:44,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:26:44,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-01 15:26:44,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:26:44,879 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-01 15:26:44,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:26:44,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-01 15:26:44,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943987497] [2020-12-01 15:26:44,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-01 15:26:44,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:26:44,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-01 15:26:44,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-01 15:26:44,884 INFO L87 Difference]: Start difference. First operand 121 states and 152 transitions. Second operand 13 states. [2020-12-01 15:26:45,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:26:45,262 INFO L93 Difference]: Finished difference Result 403 states and 505 transitions. [2020-12-01 15:26:45,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-01 15:26:45,263 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-12-01 15:26:45,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:26:45,265 INFO L225 Difference]: With dead ends: 403 [2020-12-01 15:26:45,266 INFO L226 Difference]: Without dead ends: 298 [2020-12-01 15:26:45,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-12-01 15:26:45,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-12-01 15:26:45,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 204. [2020-12-01 15:26:45,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-12-01 15:26:45,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 261 transitions. [2020-12-01 15:26:45,301 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 261 transitions. Word has length 33 [2020-12-01 15:26:45,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:26:45,301 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 261 transitions. [2020-12-01 15:26:45,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-01 15:26:45,301 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 261 transitions. [2020-12-01 15:26:45,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-01 15:26:45,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:26:45,303 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:26:45,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-01 15:26:45,511 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:26:45,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:26:45,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1071791489, now seen corresponding path program 4 times [2020-12-01 15:26:45,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:26:45,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675312555] [2020-12-01 15:26:45,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:26:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:45,601 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 15:26:45,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675312555] [2020-12-01 15:26:45,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116188250] [2020-12-01 15:26:45,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:26:45,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-01 15:26:45,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:26:45,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-01 15:26:45,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:26:45,766 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 15:26:45,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:26:45,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-01 15:26:45,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020052662] [2020-12-01 15:26:45,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-01 15:26:45,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:26:45,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-01 15:26:45,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-01 15:26:45,769 INFO L87 Difference]: Start difference. First operand 204 states and 261 transitions. Second operand 13 states. [2020-12-01 15:26:46,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:26:46,202 INFO L93 Difference]: Finished difference Result 487 states and 611 transitions. [2020-12-01 15:26:46,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-01 15:26:46,203 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-12-01 15:26:46,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:26:46,206 INFO L225 Difference]: With dead ends: 487 [2020-12-01 15:26:46,206 INFO L226 Difference]: Without dead ends: 465 [2020-12-01 15:26:46,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2020-12-01 15:26:46,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-12-01 15:26:46,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 289. [2020-12-01 15:26:46,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-12-01 15:26:46,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 379 transitions. [2020-12-01 15:26:46,253 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 379 transitions. Word has length 34 [2020-12-01 15:26:46,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:26:46,253 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 379 transitions. [2020-12-01 15:26:46,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-01 15:26:46,253 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 379 transitions. [2020-12-01 15:26:46,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-01 15:26:46,254 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:26:46,255 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:26:46,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-01 15:26:46,483 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:26:46,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:26:46,484 INFO L82 PathProgramCache]: Analyzing trace with hash -715108188, now seen corresponding path program 2 times [2020-12-01 15:26:46,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:26:46,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716611560] [2020-12-01 15:26:46,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:26:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:47,096 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-01 15:26:47,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716611560] [2020-12-01 15:26:47,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068173748] [2020-12-01 15:26:47,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:26:47,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:26:47,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:26:47,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-01 15:26:47,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:26:47,214 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:26:47,215 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2020-12-01 15:26:47,217 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:26:47,232 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:26:47,233 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-01 15:26:47,233 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:32 [2020-12-01 15:26:47,412 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 22 [2020-12-01 15:26:47,413 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:26:47,434 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:26:47,435 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-01 15:26:47,435 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:46 [2020-12-01 15:26:47,708 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:26:47,708 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 4 case distinctions, treesize of input 70 treesize of output 100 [2020-12-01 15:26:47,712 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 15:26:47,713 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:26:47,717 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:26:47,795 INFO L625 ElimStorePlain]: treesize reduction 125, result has 35.2 percent of original size [2020-12-01 15:26:47,797 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-01 15:26:47,797 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:98, output treesize:68 [2020-12-01 15:26:47,981 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:26:47,981 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 55 [2020-12-01 15:26:47,991 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:26:47,992 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:26:47,994 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:26:47,997 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-01 15:26:47,999 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:26:48,032 INFO L625 ElimStorePlain]: treesize reduction 26, result has 51.9 percent of original size [2020-12-01 15:26:48,034 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-01 15:26:48,034 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:85, output treesize:12 [2020-12-01 15:26:48,088 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 15:26:48,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:26:48,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2020-12-01 15:26:48,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472641162] [2020-12-01 15:26:48,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-01 15:26:48,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:26:48,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-01 15:26:48,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-12-01 15:26:48,091 INFO L87 Difference]: Start difference. First operand 289 states and 379 transitions. Second operand 24 states. [2020-12-01 15:26:50,050 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-12-01 15:26:50,275 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-01 15:26:53,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:26:53,437 INFO L93 Difference]: Finished difference Result 858 states and 1076 transitions. [2020-12-01 15:26:53,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-01 15:26:53,438 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 34 [2020-12-01 15:26:53,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:26:53,445 INFO L225 Difference]: With dead ends: 858 [2020-12-01 15:26:53,446 INFO L226 Difference]: Without dead ends: 771 [2020-12-01 15:26:53,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2267 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=970, Invalid=6170, Unknown=0, NotChecked=0, Total=7140 [2020-12-01 15:26:53,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2020-12-01 15:26:53,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 414. [2020-12-01 15:26:53,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-12-01 15:26:53,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 558 transitions. [2020-12-01 15:26:53,573 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 558 transitions. Word has length 34 [2020-12-01 15:26:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:26:53,575 INFO L481 AbstractCegarLoop]: Abstraction has 414 states and 558 transitions. [2020-12-01 15:26:53,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-01 15:26:53,575 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 558 transitions. [2020-12-01 15:26:53,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-01 15:26:53,577 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:26:53,577 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:26:53,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-01 15:26:53,802 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:26:53,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:26:53,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1136182421, now seen corresponding path program 5 times [2020-12-01 15:26:53,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:26:53,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755566642] [2020-12-01 15:26:53,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:26:53,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:26:54,467 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2020-12-01 15:26:55,409 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-01 15:26:55,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755566642] [2020-12-01 15:26:55,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602234997] [2020-12-01 15:26:55,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:26:55,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-01 15:26:55,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:26:55,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-01 15:26:55,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:26:55,798 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:26:55,798 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2020-12-01 15:26:55,802 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:26:55,828 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:26:55,830 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-01 15:26:55,831 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:66, output treesize:48 [2020-12-01 15:26:55,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:55,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:55,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:55,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:55,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:55,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:55,910 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 54 [2020-12-01 15:26:55,912 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:26:55,947 INFO L625 ElimStorePlain]: treesize reduction 4, result has 92.3 percent of original size [2020-12-01 15:26:55,948 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-01 15:26:55,948 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:48 [2020-12-01 15:26:56,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:56,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:56,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:56,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:56,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:56,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:56,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:56,158 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-01 15:26:56,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:56,490 WARN L197 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-12-01 15:26:56,490 INFO L348 Elim1Store]: treesize reduction 8, result has 96.6 percent of original size [2020-12-01 15:26:56,495 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 65 treesize of output 259 [2020-12-01 15:26:56,502 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:26:56,503 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:26:56,508 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:26:56,549 INFO L625 ElimStorePlain]: treesize reduction 15, result has 80.5 percent of original size [2020-12-01 15:26:56,549 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-01 15:26:56,550 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:62 [2020-12-01 15:26:56,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:56,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:56,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:56,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:56,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:56,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:56,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:56,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:56,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:56,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:56,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:56,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:56,765 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-01 15:26:56,766 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-01 15:26:57,064 WARN L197 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-12-01 15:26:57,065 INFO L348 Elim1Store]: treesize reduction 8, result has 97.6 percent of original size [2020-12-01 15:26:57,065 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 79 treesize of output 359 [2020-12-01 15:26:57,069 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:26:57,071 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-01 15:26:57,071 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-01 15:26:57,072 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 15:26:57,083 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:26:57,148 INFO L625 ElimStorePlain]: treesize reduction 67, result has 56.8 percent of original size [2020-12-01 15:26:57,150 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-01 15:26:57,150 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:88, output treesize:88 [2020-12-01 15:26:57,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:57,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:57,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:57,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:57,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:57,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:57,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:57,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:57,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:26:57,506 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-01 15:26:57,788 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-12-01 15:26:57,789 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:26:57,789 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 99 treesize of output 452 [2020-12-01 15:26:57,799 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-01 15:26:57,800 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 15:26:57,802 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-12-01 15:26:57,802 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-01 15:26:57,803 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 15:26:57,811 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:26:57,933 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2020-12-01 15:26:57,934 INFO L625 ElimStorePlain]: treesize reduction 117, result has 46.8 percent of original size [2020-12-01 15:26:57,936 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-01 15:26:57,936 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:105, output treesize:103 [2020-12-01 15:27:06,622 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 51 [2020-12-01 15:27:10,781 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 53 [2020-12-01 15:27:17,188 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:27:17,190 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-01 15:27:17,196 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-01 15:27:17,198 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 11 disjuncts [2020-12-01 15:27:17,295 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-01 15:27:17,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:27:17,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2020-12-01 15:27:17,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562758539] [2020-12-01 15:27:17,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-01 15:27:17,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:27:17,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-01 15:27:17,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=917, Unknown=6, NotChecked=0, Total=1056 [2020-12-01 15:27:17,299 INFO L87 Difference]: Start difference. First operand 414 states and 558 transitions. Second operand 33 states. [2020-12-01 15:27:20,884 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2020-12-01 15:27:23,836 WARN L197 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 87 DAG size of output: 49 [2020-12-01 15:27:26,028 WARN L197 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-12-01 15:27:29,890 WARN L197 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-12-01 15:27:36,308 WARN L197 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-12-01 15:27:36,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:27:36,676 INFO L93 Difference]: Finished difference Result 476 states and 629 transitions. [2020-12-01 15:27:36,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-01 15:27:36,677 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 37 [2020-12-01 15:27:36,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:27:36,680 INFO L225 Difference]: With dead ends: 476 [2020-12-01 15:27:36,680 INFO L226 Difference]: Without dead ends: 438 [2020-12-01 15:27:36,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 32.7s TimeCoverageRelationStatistics Valid=500, Invalid=2463, Unknown=7, NotChecked=0, Total=2970 [2020-12-01 15:27:36,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2020-12-01 15:27:36,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 417. [2020-12-01 15:27:36,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2020-12-01 15:27:36,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 562 transitions. [2020-12-01 15:27:36,745 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 562 transitions. Word has length 37 [2020-12-01 15:27:36,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:27:36,746 INFO L481 AbstractCegarLoop]: Abstraction has 417 states and 562 transitions. [2020-12-01 15:27:36,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-01 15:27:36,746 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 562 transitions. [2020-12-01 15:27:36,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-01 15:27:36,748 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:27:36,748 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:27:36,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:27:36,975 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:27:36,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:36,975 INFO L82 PathProgramCache]: Analyzing trace with hash 301030412, now seen corresponding path program 1 times [2020-12-01 15:27:36,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:36,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485272103] [2020-12-01 15:27:36,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-01 15:27:37,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485272103] [2020-12-01 15:27:37,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865729457] [2020-12-01 15:27:37,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:27:37,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:37,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-01 15:27:37,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-01 15:27:37,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:27:37,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-01 15:27:37,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566869116] [2020-12-01 15:27:37,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-01 15:27:37,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:27:37,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-01 15:27:37,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-12-01 15:27:37,322 INFO L87 Difference]: Start difference. First operand 417 states and 562 transitions. Second operand 13 states. [2020-12-01 15:27:37,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:27:37,782 INFO L93 Difference]: Finished difference Result 583 states and 765 transitions. [2020-12-01 15:27:37,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-01 15:27:37,782 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-12-01 15:27:37,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:27:37,787 INFO L225 Difference]: With dead ends: 583 [2020-12-01 15:27:37,788 INFO L226 Difference]: Without dead ends: 561 [2020-12-01 15:27:37,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-12-01 15:27:37,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2020-12-01 15:27:37,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 416. [2020-12-01 15:27:37,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2020-12-01 15:27:37,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 556 transitions. [2020-12-01 15:27:37,874 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 556 transitions. Word has length 37 [2020-12-01 15:27:37,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:27:37,874 INFO L481 AbstractCegarLoop]: Abstraction has 416 states and 556 transitions. [2020-12-01 15:27:37,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-01 15:27:37,874 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 556 transitions. [2020-12-01 15:27:37,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-01 15:27:37,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:27:37,876 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:27:38,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-01 15:27:38,091 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:27:38,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:38,091 INFO L82 PathProgramCache]: Analyzing trace with hash 729181046, now seen corresponding path program 1 times [2020-12-01 15:27:38,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:38,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447873904] [2020-12-01 15:27:38,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:38,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:27:38,174 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:27:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:27:38,218 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:27:38,256 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:27:38,257 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-01 15:27:38,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-01 15:27:38,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 03:27:38 BoogieIcfgContainer [2020-12-01 15:27:38,361 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 15:27:38,361 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 15:27:38,361 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 15:27:38,361 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 15:27:38,362 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:26:13" (3/4) ... [2020-12-01 15:27:38,364 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-01 15:27:38,459 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_9617f307-6325-4d3c-a329-0d6ec257909b/bin/uautomizer/witness.graphml [2020-12-01 15:27:38,460 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 15:27:38,461 INFO L168 Benchmark]: Toolchain (without parser) took 86347.14 ms. Allocated memory was 102.8 MB in the beginning and 318.8 MB in the end (delta: 216.0 MB). Free memory was 71.0 MB in the beginning and 127.8 MB in the end (delta: -56.8 MB). Peak memory consumption was 159.0 MB. Max. memory is 16.1 GB. [2020-12-01 15:27:38,461 INFO L168 Benchmark]: CDTParser took 0.41 ms. Allocated memory is still 81.8 MB. Free memory was 41.7 MB in the beginning and 41.7 MB in the end (delta: 33.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:27:38,461 INFO L168 Benchmark]: CACSL2BoogieTranslator took 366.95 ms. Allocated memory is still 102.8 MB. Free memory was 70.8 MB in the beginning and 77.1 MB in the end (delta: -6.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-01 15:27:38,462 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.42 ms. Allocated memory is still 102.8 MB. Free memory was 77.1 MB in the beginning and 75.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:27:38,462 INFO L168 Benchmark]: Boogie Preprocessor took 69.45 ms. Allocated memory is still 102.8 MB. Free memory was 75.0 MB in the beginning and 73.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:27:38,462 INFO L168 Benchmark]: RCFGBuilder took 642.67 ms. Allocated memory is still 102.8 MB. Free memory was 73.3 MB in the beginning and 52.7 MB in the end (delta: 20.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-12-01 15:27:38,463 INFO L168 Benchmark]: TraceAbstraction took 85095.81 ms. Allocated memory was 102.8 MB in the beginning and 318.8 MB in the end (delta: 216.0 MB). Free memory was 52.4 MB in the beginning and 132.0 MB in the end (delta: -79.7 MB). Peak memory consumption was 136.7 MB. Max. memory is 16.1 GB. [2020-12-01 15:27:38,464 INFO L168 Benchmark]: Witness Printer took 98.48 ms. Allocated memory is still 318.8 MB. Free memory was 132.0 MB in the beginning and 127.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-01 15:27:38,466 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41 ms. Allocated memory is still 81.8 MB. Free memory was 41.7 MB in the beginning and 41.7 MB in the end (delta: 33.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 366.95 ms. Allocated memory is still 102.8 MB. Free memory was 70.8 MB in the beginning and 77.1 MB in the end (delta: -6.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 51.42 ms. Allocated memory is still 102.8 MB. Free memory was 77.1 MB in the beginning and 75.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 69.45 ms. Allocated memory is still 102.8 MB. Free memory was 75.0 MB in the beginning and 73.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 642.67 ms. Allocated memory is still 102.8 MB. Free memory was 73.3 MB in the beginning and 52.7 MB in the end (delta: 20.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 85095.81 ms. Allocated memory was 102.8 MB in the beginning and 318.8 MB in the end (delta: 216.0 MB). Free memory was 52.4 MB in the beginning and 132.0 MB in the end (delta: -79.7 MB). Peak memory consumption was 136.7 MB. Max. memory is 16.1 GB. * Witness Printer took 98.48 ms. Allocated memory is still 318.8 MB. Free memory was 132.0 MB in the beginning and 127.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L16] int INFINITY = 899; VAL [INFINITY=899] [L18] int nodecount = __VERIFIER_nondet_int(); [L19] int edgecount = __VERIFIER_nondet_int(); [L20] COND FALSE !(!(0 <= nodecount && nodecount <= 4)) VAL [INFINITY=899] [L21] COND FALSE !(!(0 <= edgecount && edgecount <= 19)) [L22] int source = 0; [L23] int Source[20] = {0,4,1,1,0,0,1,3,4,4,2,2,3,0,0,3,1,2,2,3}; [L24] int Dest[20] = {1,3,4,1,1,4,3,4,3,0,0,0,0,2,3,0,2,1,0,4}; [L25] int Weight[20] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19}; [L26] int distance[5]; [L27] int x,y; [L28] int i,j; [L30] i = 0 VAL [INFINITY=899] [L30] COND TRUE i < nodecount VAL [INFINITY=899] [L31] COND TRUE i == source [L32] distance[i] = 0 VAL [INFINITY=899] [L30] i++ VAL [INFINITY=899] [L30] COND TRUE i < nodecount VAL [INFINITY=899] [L31] COND FALSE !(i == source) [L35] distance[i] = INFINITY VAL [INFINITY=899] [L30] i++ VAL [INFINITY=899] [L30] COND FALSE !(i < nodecount) VAL [INFINITY=899] [L39] i = 0 VAL [INFINITY=899] [L39] COND TRUE i < nodecount [L41] j = 0 VAL [INFINITY=899] [L41] COND TRUE j < edgecount [L43] EXPR Dest[j] [L43] x = Dest[j] [L44] EXPR Source[j] [L44] y = Source[j] [L45] EXPR distance[x] [L45] EXPR distance[y] [L45] EXPR Weight[j] VAL [INFINITY=899] [L45] COND TRUE distance[x] > distance[y] + Weight[j] [L47] distance[x] = -1 VAL [INFINITY=899] [L41] j++ VAL [INFINITY=899] [L41] COND FALSE !(j < edgecount) VAL [INFINITY=899] [L39] i++ VAL [INFINITY=899] [L39] COND TRUE i < nodecount [L41] j = 0 VAL [INFINITY=899] [L41] COND TRUE j < edgecount [L43] EXPR Dest[j] [L43] x = Dest[j] [L44] EXPR Source[j] [L44] y = Source[j] [L45] EXPR distance[x] [L45] EXPR distance[y] [L45] EXPR Weight[j] VAL [INFINITY=899] [L45] COND FALSE !(distance[x] > distance[y] + Weight[j]) [L41] j++ VAL [INFINITY=899] [L41] COND FALSE !(j < edgecount) VAL [INFINITY=899] [L39] i++ VAL [INFINITY=899] [L39] COND FALSE !(i < nodecount) VAL [INFINITY=899] [L51] i = 0 VAL [INFINITY=899] [L51] COND TRUE i < edgecount [L53] EXPR Dest[i] [L53] x = Dest[i] [L54] EXPR Source[i] [L54] y = Source[i] [L55] EXPR distance[x] [L55] EXPR distance[y] [L55] EXPR Weight[i] VAL [INFINITY=899] [L55] COND FALSE !(distance[x] > distance[y] + Weight[i]) [L51] i++ VAL [INFINITY=899] [L51] COND FALSE !(i < edgecount) VAL [INFINITY=899] [L61] i = 0 VAL [INFINITY=899] [L61] COND TRUE i < nodecount [L63] distance[i] [L11] COND FALSE !(!(cond)) VAL [INFINITY=899] [L61] i++ VAL [INFINITY=899] [L61] COND TRUE i < nodecount [L63] distance[i] [L11] COND TRUE !(cond) VAL [INFINITY=899] [L7] __assert_fail("0", "eureka_01-1.c", 7, "reach_error") VAL [INFINITY=899] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 84.9s, OverallIterations: 19, TraceHistogramMax: 3, AutomataDifference: 41.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 623 SDtfs, 2477 SDslu, 2957 SDs, 0 SdLazy, 4028 SolverSat, 1176 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 11.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 768 GetRequests, 360 SyntacticMatches, 15 SemanticMatches, 393 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4626 ImplicationChecksByTransitivity, 55.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=417occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 18 MinimizatonAttempts, 1361 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 36.3s InterpolantComputationTime, 957 NumberOfCodeBlocks, 954 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 886 ConstructedInterpolants, 64 QuantifiedInterpolants, 404374 SizeOfPredicates, 118 NumberOfNonLiveVariables, 3724 ConjunctsInSsa, 254 ConjunctsInUnsatCore, 33 InterpolantComputations, 4 PerfectInterpolantSequences, 146/373 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...