./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test24-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test24-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC --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 fa528625528e1eb8428ab738bffd6c9e4b89662e ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.0-7b2dab5 [2021-10-11 00:22:08,632 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 00:22:08,635 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 00:22:08,670 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 00:22:08,670 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 00:22:08,672 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 00:22:08,674 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 00:22:08,676 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 00:22:08,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 00:22:08,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 00:22:08,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 00:22:08,685 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 00:22:08,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 00:22:08,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 00:22:08,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 00:22:08,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 00:22:08,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 00:22:08,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 00:22:08,697 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 00:22:08,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 00:22:08,712 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 00:22:08,716 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 00:22:08,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 00:22:08,719 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 00:22:08,722 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 00:22:08,723 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 00:22:08,723 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 00:22:08,724 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 00:22:08,725 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 00:22:08,726 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 00:22:08,727 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 00:22:08,728 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 00:22:08,736 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 00:22:08,738 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 00:22:08,739 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 00:22:08,739 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 00:22:08,740 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 00:22:08,741 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 00:22:08,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 00:22:08,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 00:22:08,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 00:22:08,745 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-11 00:22:08,783 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 00:22:08,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 00:22:08,786 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 00:22:08,786 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 00:22:08,786 INFO L138 SettingsManager]: * Use SBE=true [2021-10-11 00:22:08,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 00:22:08,787 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 00:22:08,787 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 00:22:08,787 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 00:22:08,787 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 00:22:08,788 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 00:22:08,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 00:22:08,789 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 00:22:08,789 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 00:22:08,789 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 00:22:08,789 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 00:22:08,790 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 00:22:08,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 00:22:08,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 00:22:08,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 00:22:08,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:22:08,791 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 00:22:08,791 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 00:22:08,791 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 00:22:08,791 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-11 00:22:08,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 00:22:08,792 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 00:22:08,792 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 00:22:08,792 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_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa528625528e1eb8428ab738bffd6c9e4b89662e [2021-10-11 00:22:09,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 00:22:09,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 00:22:09,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 00:22:09,124 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 00:22:09,124 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 00:22:09,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/ldv-regression/test24-2.c [2021-10-11 00:22:09,195 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/data/d7240361b/cd1f0c29225c4b248634430d7eb4ff1b/FLAGacebcd08c [2021-10-11 00:22:09,712 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 00:22:09,714 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/sv-benchmarks/c/ldv-regression/test24-2.c [2021-10-11 00:22:09,724 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/data/d7240361b/cd1f0c29225c4b248634430d7eb4ff1b/FLAGacebcd08c [2021-10-11 00:22:10,070 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/data/d7240361b/cd1f0c29225c4b248634430d7eb4ff1b [2021-10-11 00:22:10,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 00:22:10,074 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 00:22:10,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 00:22:10,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 00:22:10,079 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 00:22:10,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:22:10" (1/1) ... [2021-10-11 00:22:10,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@585a8f6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:10, skipping insertion in model container [2021-10-11 00:22:10,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:22:10" (1/1) ... [2021-10-11 00:22:10,091 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 00:22:10,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 00:22:10,313 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/sv-benchmarks/c/ldv-regression/test24-2.c[807,820] [2021-10-11 00:22:10,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:22:10,323 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 00:22:10,341 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/sv-benchmarks/c/ldv-regression/test24-2.c[807,820] [2021-10-11 00:22:10,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:22:10,354 INFO L208 MainTranslator]: Completed translation [2021-10-11 00:22:10,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:10 WrapperNode [2021-10-11 00:22:10,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 00:22:10,355 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 00:22:10,356 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 00:22:10,356 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 00:22:10,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:10" (1/1) ... [2021-10-11 00:22:10,368 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:10" (1/1) ... [2021-10-11 00:22:10,397 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 00:22:10,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 00:22:10,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 00:22:10,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 00:22:10,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:10" (1/1) ... [2021-10-11 00:22:10,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:10" (1/1) ... [2021-10-11 00:22:10,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:10" (1/1) ... [2021-10-11 00:22:10,423 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:10" (1/1) ... [2021-10-11 00:22:10,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:10" (1/1) ... [2021-10-11 00:22:10,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:10" (1/1) ... [2021-10-11 00:22:10,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:10" (1/1) ... [2021-10-11 00:22:10,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 00:22:10,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 00:22:10,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 00:22:10,453 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 00:22:10,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:10" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:22:10,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 00:22:10,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 00:22:10,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 00:22:10,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 00:22:10,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 00:22:10,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 00:22:10,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 00:22:10,830 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 00:22:10,830 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-11 00:22:10,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:22:10 BoogieIcfgContainer [2021-10-11 00:22:10,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 00:22:10,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 00:22:10,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 00:22:10,850 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 00:22:10,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:22:10" (1/3) ... [2021-10-11 00:22:10,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10c176bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:22:10, skipping insertion in model container [2021-10-11 00:22:10,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:10" (2/3) ... [2021-10-11 00:22:10,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10c176bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:22:10, skipping insertion in model container [2021-10-11 00:22:10,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:22:10" (3/3) ... [2021-10-11 00:22:10,853 INFO L111 eAbstractionObserver]: Analyzing ICFG test24-2.c [2021-10-11 00:22:10,866 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 00:22:10,883 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 00:22:10,893 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 00:22:10,915 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 00:22:10,916 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 00:22:10,916 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 00:22:10,916 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 00:22:10,916 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 00:22:10,916 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 00:22:10,917 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 00:22:10,917 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 00:22:10,929 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2021-10-11 00:22:10,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 00:22:10,934 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:10,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:10,935 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:10,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:10,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1829445793, now seen corresponding path program 1 times [2021-10-11 00:22:10,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:10,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346670751] [2021-10-11 00:22:10,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:11,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:11,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346670751] [2021-10-11 00:22:11,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:22:11,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 00:22:11,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022993429] [2021-10-11 00:22:11,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 00:22:11,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:11,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 00:22:11,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:22:11,215 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2021-10-11 00:22:11,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:11,273 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2021-10-11 00:22:11,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 00:22:11,275 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2021-10-11 00:22:11,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:11,287 INFO L225 Difference]: With dead ends: 30 [2021-10-11 00:22:11,287 INFO L226 Difference]: Without dead ends: 13 [2021-10-11 00:22:11,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:22:11,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-11 00:22:11,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-11 00:22:11,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-11 00:22:11,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-10-11 00:22:11,323 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2021-10-11 00:22:11,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:11,324 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-10-11 00:22:11,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 00:22:11,324 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-10-11 00:22:11,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 00:22:11,325 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:11,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:11,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 00:22:11,327 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:11,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:11,332 INFO L82 PathProgramCache]: Analyzing trace with hash 672236885, now seen corresponding path program 1 times [2021-10-11 00:22:11,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:11,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120877013] [2021-10-11 00:22:11,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:11,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:11,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120877013] [2021-10-11 00:22:11,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:22:11,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 00:22:11,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539679607] [2021-10-11 00:22:11,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 00:22:11,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:11,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 00:22:11,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 00:22:11,406 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2021-10-11 00:22:11,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:11,440 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-10-11 00:22:11,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 00:22:11,441 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2021-10-11 00:22:11,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:11,442 INFO L225 Difference]: With dead ends: 24 [2021-10-11 00:22:11,442 INFO L226 Difference]: Without dead ends: 15 [2021-10-11 00:22:11,443 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 [2021-10-11 00:22:11,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-11 00:22:11,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-10-11 00:22:11,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-11 00:22:11,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-10-11 00:22:11,450 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-10-11 00:22:11,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:11,450 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-10-11 00:22:11,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 00:22:11,451 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-10-11 00:22:11,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-11 00:22:11,452 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:11,452 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:11,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 00:22:11,454 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:11,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:11,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1835948819, now seen corresponding path program 1 times [2021-10-11 00:22:11,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:11,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900589569] [2021-10-11 00:22:11,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:11,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:11,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900589569] [2021-10-11 00:22:11,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170215503] [2021-10-11 00:22:11,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:22:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:11,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 00:22:11,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:22:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:11,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:22:11,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-11 00:22:11,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888574042] [2021-10-11 00:22:11,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 00:22:11,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:11,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 00:22:11,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:22:11,713 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2021-10-11 00:22:11,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:11,733 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-10-11 00:22:11,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:22:11,734 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2021-10-11 00:22:11,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:11,735 INFO L225 Difference]: With dead ends: 26 [2021-10-11 00:22:11,735 INFO L226 Difference]: Without dead ends: 17 [2021-10-11 00:22:11,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:22:11,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-11 00:22:11,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-10-11 00:22:11,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-11 00:22:11,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-10-11 00:22:11,739 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2021-10-11 00:22:11,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:11,740 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-10-11 00:22:11,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 00:22:11,740 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-10-11 00:22:11,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-11 00:22:11,741 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:11,741 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:11,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-11 00:22:11,969 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:11,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:11,969 INFO L82 PathProgramCache]: Analyzing trace with hash -823346863, now seen corresponding path program 2 times [2021-10-11 00:22:11,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:11,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486168235] [2021-10-11 00:22:11,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:11,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:12,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486168235] [2021-10-11 00:22:12,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408429062] [2021-10-11 00:22:12,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:22:12,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 00:22:12,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:22:12,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 00:22:12,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:22:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:12,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:22:12,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-11 00:22:12,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680679518] [2021-10-11 00:22:12,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 00:22:12,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:12,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 00:22:12,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:22:12,210 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2021-10-11 00:22:12,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:12,244 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-10-11 00:22:12,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 00:22:12,244 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2021-10-11 00:22:12,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:12,246 INFO L225 Difference]: With dead ends: 28 [2021-10-11 00:22:12,246 INFO L226 Difference]: Without dead ends: 19 [2021-10-11 00:22:12,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:22:12,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-11 00:22:12,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-10-11 00:22:12,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-11 00:22:12,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-10-11 00:22:12,257 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2021-10-11 00:22:12,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:12,258 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-10-11 00:22:12,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 00:22:12,258 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-10-11 00:22:12,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-11 00:22:12,260 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:12,260 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:12,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:22:12,485 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:12,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:12,487 INFO L82 PathProgramCache]: Analyzing trace with hash -900956145, now seen corresponding path program 3 times [2021-10-11 00:22:12,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:12,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024554723] [2021-10-11 00:22:12,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:12,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024554723] [2021-10-11 00:22:12,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488138796] [2021-10-11 00:22:12,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:22:12,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-11 00:22:12,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:22:12,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-11 00:22:12,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:22:12,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:12,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:22:12,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-11 00:22:12,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7992527] [2021-10-11 00:22:12,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 00:22:12,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:12,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 00:22:12,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:22:12,650 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2021-10-11 00:22:12,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:12,674 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-10-11 00:22:12,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:22:12,674 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2021-10-11 00:22:12,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:12,675 INFO L225 Difference]: With dead ends: 30 [2021-10-11 00:22:12,675 INFO L226 Difference]: Without dead ends: 21 [2021-10-11 00:22:12,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:22:12,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-11 00:22:12,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-10-11 00:22:12,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-11 00:22:12,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-10-11 00:22:12,679 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2021-10-11 00:22:12,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:12,679 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-10-11 00:22:12,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 00:22:12,680 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-10-11 00:22:12,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-11 00:22:12,680 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:12,680 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:12,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:22:12,907 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:12,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:12,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1825935181, now seen corresponding path program 4 times [2021-10-11 00:22:12,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:12,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287590229] [2021-10-11 00:22:12,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:12,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:13,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287590229] [2021-10-11 00:22:13,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291921850] [2021-10-11 00:22:13,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:22:13,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 00:22:13,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:22:13,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 00:22:13,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:22:13,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:13,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:22:13,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-11 00:22:13,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351404778] [2021-10-11 00:22:13,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 00:22:13,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:13,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 00:22:13,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:22:13,135 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2021-10-11 00:22:13,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:13,172 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-10-11 00:22:13,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 00:22:13,173 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2021-10-11 00:22:13,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:13,174 INFO L225 Difference]: With dead ends: 32 [2021-10-11 00:22:13,176 INFO L226 Difference]: Without dead ends: 23 [2021-10-11 00:22:13,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:22:13,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-11 00:22:13,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-10-11 00:22:13,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-11 00:22:13,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-10-11 00:22:13,185 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2021-10-11 00:22:13,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:13,185 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-10-11 00:22:13,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 00:22:13,186 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-10-11 00:22:13,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-11 00:22:13,186 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:13,187 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:13,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:22:13,413 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:13,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:13,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1856518389, now seen corresponding path program 5 times [2021-10-11 00:22:13,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:13,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814507048] [2021-10-11 00:22:13,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:13,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:13,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814507048] [2021-10-11 00:22:13,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713868055] [2021-10-11 00:22:13,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:22:13,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-11 00:22:13,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:22:13,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 00:22:13,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:22:13,675 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:13,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:22:13,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-11 00:22:13,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191990051] [2021-10-11 00:22:13,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-10-11 00:22:13,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:13,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-11 00:22:13,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-11 00:22:13,685 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2021-10-11 00:22:13,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:13,716 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-10-11 00:22:13,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 00:22:13,717 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2021-10-11 00:22:13,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:13,718 INFO L225 Difference]: With dead ends: 34 [2021-10-11 00:22:13,718 INFO L226 Difference]: Without dead ends: 25 [2021-10-11 00:22:13,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-11 00:22:13,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-11 00:22:13,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-10-11 00:22:13,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-11 00:22:13,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-10-11 00:22:13,726 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2021-10-11 00:22:13,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:13,726 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-10-11 00:22:13,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-10-11 00:22:13,726 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-10-11 00:22:13,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-11 00:22:13,727 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:13,727 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:13,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-11 00:22:13,928 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:13,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:13,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1641347255, now seen corresponding path program 6 times [2021-10-11 00:22:13,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:13,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731567765] [2021-10-11 00:22:13,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:14,049 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:14,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731567765] [2021-10-11 00:22:14,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715090858] [2021-10-11 00:22:14,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:22:14,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-11 00:22:14,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:22:14,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 00:22:14,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:22:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:14,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:22:14,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-10-11 00:22:14,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432921129] [2021-10-11 00:22:14,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-10-11 00:22:14,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:14,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-11 00:22:14,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-11 00:22:14,287 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2021-10-11 00:22:14,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:14,319 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-10-11 00:22:14,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 00:22:14,319 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2021-10-11 00:22:14,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:14,320 INFO L225 Difference]: With dead ends: 36 [2021-10-11 00:22:14,320 INFO L226 Difference]: Without dead ends: 27 [2021-10-11 00:22:14,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-11 00:22:14,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-11 00:22:14,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-10-11 00:22:14,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-11 00:22:14,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-10-11 00:22:14,332 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2021-10-11 00:22:14,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:14,332 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-10-11 00:22:14,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-10-11 00:22:14,333 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-10-11 00:22:14,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-11 00:22:14,333 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:14,334 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:14,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:22:14,561 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:14,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:14,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1020317689, now seen corresponding path program 7 times [2021-10-11 00:22:14,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:14,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455136056] [2021-10-11 00:22:14,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:14,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455136056] [2021-10-11 00:22:14,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100016927] [2021-10-11 00:22:14,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:22:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:14,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-11 00:22:14,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:22:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:14,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:22:14,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-10-11 00:22:14,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949491673] [2021-10-11 00:22:14,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-10-11 00:22:14,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:14,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-11 00:22:14,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-11 00:22:14,804 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2021-10-11 00:22:14,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:14,845 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-10-11 00:22:14,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-11 00:22:14,846 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2021-10-11 00:22:14,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:14,846 INFO L225 Difference]: With dead ends: 38 [2021-10-11 00:22:14,847 INFO L226 Difference]: Without dead ends: 29 [2021-10-11 00:22:14,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-11 00:22:14,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-11 00:22:14,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-10-11 00:22:14,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-11 00:22:14,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-11 00:22:14,851 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2021-10-11 00:22:14,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:14,851 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-11 00:22:14,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-10-11 00:22:14,852 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-11 00:22:14,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-11 00:22:14,852 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:14,853 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:15,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:22:15,061 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:15,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:15,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1211358907, now seen corresponding path program 8 times [2021-10-11 00:22:15,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:15,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345091980] [2021-10-11 00:22:15,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:15,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:15,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345091980] [2021-10-11 00:22:15,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439062362] [2021-10-11 00:22:15,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:22:15,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 00:22:15,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:22:15,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-11 00:22:15,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:22:15,412 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:15,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:22:15,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-10-11 00:22:15,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603838564] [2021-10-11 00:22:15,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-10-11 00:22:15,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:15,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-11 00:22:15,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-11 00:22:15,414 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 12 states. [2021-10-11 00:22:15,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:15,458 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-10-11 00:22:15,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-11 00:22:15,459 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2021-10-11 00:22:15,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:15,461 INFO L225 Difference]: With dead ends: 40 [2021-10-11 00:22:15,462 INFO L226 Difference]: Without dead ends: 31 [2021-10-11 00:22:15,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-11 00:22:15,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-11 00:22:15,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-10-11 00:22:15,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-11 00:22:15,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-10-11 00:22:15,466 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2021-10-11 00:22:15,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:15,467 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-10-11 00:22:15,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-10-11 00:22:15,467 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-10-11 00:22:15,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-11 00:22:15,467 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:15,468 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:15,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-11 00:22:15,693 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:15,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:15,693 INFO L82 PathProgramCache]: Analyzing trace with hash -118375677, now seen corresponding path program 9 times [2021-10-11 00:22:15,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:15,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643910207] [2021-10-11 00:22:15,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:15,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:15,864 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:15,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643910207] [2021-10-11 00:22:15,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445163302] [2021-10-11 00:22:15,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:22:16,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-11 00:22:16,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:22:16,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-11 00:22:16,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:22:16,177 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:16,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:22:16,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-10-11 00:22:16,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013553775] [2021-10-11 00:22:16,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-10-11 00:22:16,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:16,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-11 00:22:16,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-10-11 00:22:16,179 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 13 states. [2021-10-11 00:22:16,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:16,234 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-10-11 00:22:16,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-11 00:22:16,235 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2021-10-11 00:22:16,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:16,236 INFO L225 Difference]: With dead ends: 42 [2021-10-11 00:22:16,236 INFO L226 Difference]: Without dead ends: 33 [2021-10-11 00:22:16,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-10-11 00:22:16,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-11 00:22:16,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-10-11 00:22:16,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-10-11 00:22:16,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-10-11 00:22:16,240 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2021-10-11 00:22:16,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:16,240 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-10-11 00:22:16,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-10-11 00:22:16,240 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-10-11 00:22:16,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-11 00:22:16,241 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:16,241 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:16,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:22:16,469 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:16,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:16,469 INFO L82 PathProgramCache]: Analyzing trace with hash -2028479167, now seen corresponding path program 10 times [2021-10-11 00:22:16,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:16,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932844618] [2021-10-11 00:22:16,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:16,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932844618] [2021-10-11 00:22:16,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552867872] [2021-10-11 00:22:16,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:22:16,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 00:22:16,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:22:16,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-11 00:22:16,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:22:16,743 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:16,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:22:16,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-10-11 00:22:16,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269400148] [2021-10-11 00:22:16,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-10-11 00:22:16,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:16,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-11 00:22:16,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-10-11 00:22:16,745 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 14 states. [2021-10-11 00:22:16,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:16,798 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-10-11 00:22:16,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-11 00:22:16,798 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2021-10-11 00:22:16,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:16,799 INFO L225 Difference]: With dead ends: 44 [2021-10-11 00:22:16,799 INFO L226 Difference]: Without dead ends: 35 [2021-10-11 00:22:16,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-10-11 00:22:16,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-11 00:22:16,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-10-11 00:22:16,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-10-11 00:22:16,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-10-11 00:22:16,812 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2021-10-11 00:22:16,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:16,812 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-10-11 00:22:16,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-10-11 00:22:16,812 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-10-11 00:22:16,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-11 00:22:16,813 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:16,813 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:17,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:22:17,029 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:17,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:17,029 INFO L82 PathProgramCache]: Analyzing trace with hash 608069631, now seen corresponding path program 11 times [2021-10-11 00:22:17,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:17,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2605844] [2021-10-11 00:22:17,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:17,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:17,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2605844] [2021-10-11 00:22:17,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462512628] [2021-10-11 00:22:17,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:22:17,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-10-11 00:22:17,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:22:17,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-11 00:22:17,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:22:17,528 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:17,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:22:17,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-10-11 00:22:17,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816291542] [2021-10-11 00:22:17,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-10-11 00:22:17,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:17,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-11 00:22:17,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-10-11 00:22:17,530 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 15 states. [2021-10-11 00:22:17,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:17,583 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-10-11 00:22:17,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-11 00:22:17,583 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2021-10-11 00:22:17,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:17,584 INFO L225 Difference]: With dead ends: 46 [2021-10-11 00:22:17,584 INFO L226 Difference]: Without dead ends: 37 [2021-10-11 00:22:17,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-10-11 00:22:17,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-11 00:22:17,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-10-11 00:22:17,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-10-11 00:22:17,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-10-11 00:22:17,588 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2021-10-11 00:22:17,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:17,589 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-10-11 00:22:17,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-10-11 00:22:17,589 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-10-11 00:22:17,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-11 00:22:17,589 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:17,590 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:17,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-11 00:22:17,796 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:17,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:17,797 INFO L82 PathProgramCache]: Analyzing trace with hash 300759869, now seen corresponding path program 12 times [2021-10-11 00:22:17,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:17,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393032723] [2021-10-11 00:22:17,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:18,001 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:18,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393032723] [2021-10-11 00:22:18,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083207345] [2021-10-11 00:22:18,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:22:19,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-10-11 00:22:19,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:22:19,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-11 00:22:19,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:22:19,250 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:19,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:22:19,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-10-11 00:22:19,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591107122] [2021-10-11 00:22:19,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-10-11 00:22:19,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:19,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-11 00:22:19,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-10-11 00:22:19,255 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 16 states. [2021-10-11 00:22:19,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:19,310 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-10-11 00:22:19,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-11 00:22:19,311 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2021-10-11 00:22:19,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:19,312 INFO L225 Difference]: With dead ends: 48 [2021-10-11 00:22:19,312 INFO L226 Difference]: Without dead ends: 39 [2021-10-11 00:22:19,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-10-11 00:22:19,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-11 00:22:19,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-10-11 00:22:19,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-10-11 00:22:19,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-10-11 00:22:19,316 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2021-10-11 00:22:19,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:19,317 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-10-11 00:22:19,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-10-11 00:22:19,317 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-10-11 00:22:19,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-11 00:22:19,318 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:19,318 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:19,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-11 00:22:19,544 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:19,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:19,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1328822011, now seen corresponding path program 13 times [2021-10-11 00:22:19,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:19,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392389706] [2021-10-11 00:22:19,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:19,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:19,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392389706] [2021-10-11 00:22:19,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895029951] [2021-10-11 00:22:19,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:22:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:19,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-11 00:22:19,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:22:19,916 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:19,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:22:19,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-10-11 00:22:19,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831917395] [2021-10-11 00:22:19,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-10-11 00:22:19,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:19,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-11 00:22:19,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-10-11 00:22:19,920 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 17 states. [2021-10-11 00:22:20,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:20,001 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-10-11 00:22:20,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-11 00:22:20,002 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2021-10-11 00:22:20,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:20,004 INFO L225 Difference]: With dead ends: 50 [2021-10-11 00:22:20,005 INFO L226 Difference]: Without dead ends: 41 [2021-10-11 00:22:20,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-10-11 00:22:20,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-11 00:22:20,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-10-11 00:22:20,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-10-11 00:22:20,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-10-11 00:22:20,025 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2021-10-11 00:22:20,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:20,025 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-10-11 00:22:20,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-10-11 00:22:20,026 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-10-11 00:22:20,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-11 00:22:20,028 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:20,028 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:20,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-11 00:22:20,244 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:20,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:20,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1454062393, now seen corresponding path program 14 times [2021-10-11 00:22:20,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:20,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424628584] [2021-10-11 00:22:20,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:20,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:20,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424628584] [2021-10-11 00:22:20,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834169725] [2021-10-11 00:22:20,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:22:20,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 00:22:20,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:22:20,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-11 00:22:20,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:22:20,581 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:20,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:22:20,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-10-11 00:22:20,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352080750] [2021-10-11 00:22:20,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-10-11 00:22:20,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:20,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-11 00:22:20,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-10-11 00:22:20,583 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 18 states. [2021-10-11 00:22:20,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:20,641 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-10-11 00:22:20,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-11 00:22:20,642 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2021-10-11 00:22:20,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:20,642 INFO L225 Difference]: With dead ends: 52 [2021-10-11 00:22:20,642 INFO L226 Difference]: Without dead ends: 43 [2021-10-11 00:22:20,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-10-11 00:22:20,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-11 00:22:20,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-10-11 00:22:20,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-10-11 00:22:20,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-10-11 00:22:20,646 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2021-10-11 00:22:20,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:20,647 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-10-11 00:22:20,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-10-11 00:22:20,647 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-10-11 00:22:20,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-11 00:22:20,648 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:20,648 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:20,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:22:20,872 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:20,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:20,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1550985207, now seen corresponding path program 15 times [2021-10-11 00:22:20,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:20,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549779784] [2021-10-11 00:22:20,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:20,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:21,107 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:21,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549779784] [2021-10-11 00:22:21,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652719161] [2021-10-11 00:22:21,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:22:23,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-10-11 00:22:23,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:22:23,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-11 00:22:23,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:22:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:23,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:22:23,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-10-11 00:22:23,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212473278] [2021-10-11 00:22:23,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-10-11 00:22:23,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:23,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-11 00:22:23,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-10-11 00:22:23,087 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 19 states. [2021-10-11 00:22:23,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:23,141 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2021-10-11 00:22:23,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-11 00:22:23,142 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2021-10-11 00:22:23,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:23,142 INFO L225 Difference]: With dead ends: 54 [2021-10-11 00:22:23,142 INFO L226 Difference]: Without dead ends: 45 [2021-10-11 00:22:23,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-10-11 00:22:23,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-11 00:22:23,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-10-11 00:22:23,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-10-11 00:22:23,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-10-11 00:22:23,146 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2021-10-11 00:22:23,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:23,146 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-10-11 00:22:23,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-10-11 00:22:23,146 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-10-11 00:22:23,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-11 00:22:23,147 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:23,147 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:23,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-11 00:22:23,357 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:23,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:23,357 INFO L82 PathProgramCache]: Analyzing trace with hash 204528949, now seen corresponding path program 16 times [2021-10-11 00:22:23,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:23,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566676430] [2021-10-11 00:22:23,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:23,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:23,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566676430] [2021-10-11 00:22:23,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490758834] [2021-10-11 00:22:23,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:22:23,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 00:22:23,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:22:23,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-11 00:22:23,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:22:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:23,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:22:23,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-10-11 00:22:23,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878099329] [2021-10-11 00:22:23,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-10-11 00:22:23,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:23,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-11 00:22:23,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-10-11 00:22:23,781 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 20 states. [2021-10-11 00:22:23,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:23,845 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2021-10-11 00:22:23,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-11 00:22:23,846 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2021-10-11 00:22:23,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:23,846 INFO L225 Difference]: With dead ends: 56 [2021-10-11 00:22:23,846 INFO L226 Difference]: Without dead ends: 47 [2021-10-11 00:22:23,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-10-11 00:22:23,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-11 00:22:23,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-10-11 00:22:23,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-10-11 00:22:23,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-10-11 00:22:23,861 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2021-10-11 00:22:23,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:23,861 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-10-11 00:22:23,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-10-11 00:22:23,861 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-10-11 00:22:23,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-11 00:22:23,870 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:23,870 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:24,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-11 00:22:24,084 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:24,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:24,085 INFO L82 PathProgramCache]: Analyzing trace with hash -954778893, now seen corresponding path program 17 times [2021-10-11 00:22:24,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:24,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782650811] [2021-10-11 00:22:24,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:24,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:24,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782650811] [2021-10-11 00:22:24,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137389105] [2021-10-11 00:22:24,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:22:26,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-10-11 00:22:26,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:22:26,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-11 00:22:26,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:22:26,303 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:26,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:22:26,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-10-11 00:22:26,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388690320] [2021-10-11 00:22:26,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-10-11 00:22:26,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:26,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-11 00:22:26,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-10-11 00:22:26,306 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 21 states. [2021-10-11 00:22:26,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:26,393 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-10-11 00:22:26,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-11 00:22:26,393 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 45 [2021-10-11 00:22:26,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:26,394 INFO L225 Difference]: With dead ends: 58 [2021-10-11 00:22:26,394 INFO L226 Difference]: Without dead ends: 49 [2021-10-11 00:22:26,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-10-11 00:22:26,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-11 00:22:26,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-10-11 00:22:26,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-10-11 00:22:26,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-10-11 00:22:26,398 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2021-10-11 00:22:26,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:26,398 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-10-11 00:22:26,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-10-11 00:22:26,398 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-10-11 00:22:26,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-11 00:22:26,399 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:26,399 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:26,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:22:26,620 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:26,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:26,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1641881905, now seen corresponding path program 18 times [2021-10-11 00:22:26,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:26,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651201032] [2021-10-11 00:22:26,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:26,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:26,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651201032] [2021-10-11 00:22:26,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334507804] [2021-10-11 00:22:26,903 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:22:32,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-10-11 00:22:32,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:22:32,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-11 00:22:32,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:22:32,148 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:32,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:22:32,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-10-11 00:22:32,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355204119] [2021-10-11 00:22:32,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-10-11 00:22:32,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:32,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-11 00:22:32,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-10-11 00:22:32,150 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 22 states. [2021-10-11 00:22:32,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:32,217 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-10-11 00:22:32,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-11 00:22:32,217 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 47 [2021-10-11 00:22:32,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:32,218 INFO L225 Difference]: With dead ends: 60 [2021-10-11 00:22:32,218 INFO L226 Difference]: Without dead ends: 51 [2021-10-11 00:22:32,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-10-11 00:22:32,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-11 00:22:32,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-10-11 00:22:32,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-10-11 00:22:32,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-10-11 00:22:32,224 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2021-10-11 00:22:32,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:32,224 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-10-11 00:22:32,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-10-11 00:22:32,224 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-10-11 00:22:32,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-11 00:22:32,225 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:32,225 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:32,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:22:32,452 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:32,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:32,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1656909807, now seen corresponding path program 19 times [2021-10-11 00:22:32,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:32,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640573673] [2021-10-11 00:22:32,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:32,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:32,745 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:32,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640573673] [2021-10-11 00:22:32,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933493701] [2021-10-11 00:22:32,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:22:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:22:32,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-11 00:22:32,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:22:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:22:32,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:22:32,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-10-11 00:22:32,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516029184] [2021-10-11 00:22:32,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-10-11 00:22:32,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:22:32,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-11 00:22:32,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-10-11 00:22:32,885 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 23 states. [2021-10-11 00:22:32,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:22:32,956 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2021-10-11 00:22:32,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-11 00:22:32,956 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2021-10-11 00:22:32,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:22:32,957 INFO L225 Difference]: With dead ends: 61 [2021-10-11 00:22:32,957 INFO L226 Difference]: Without dead ends: 52 [2021-10-11 00:22:32,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-10-11 00:22:32,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-11 00:22:32,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-10-11 00:22:32,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-10-11 00:22:32,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-10-11 00:22:32,963 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2021-10-11 00:22:32,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:22:32,964 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-10-11 00:22:32,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-10-11 00:22:32,964 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-10-11 00:22:32,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-11 00:22:32,966 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:22:32,966 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:22:33,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:22:33,180 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:22:33,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:22:33,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1081145555, now seen corresponding path program 20 times [2021-10-11 00:22:33,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:22:33,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331774534] [2021-10-11 00:22:33,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:22:33,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:22:33,319 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:22:33,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:22:33,441 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:22:33,481 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:22:33,481 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 00:22:33,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-11 00:22:33,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:22:33 BoogieIcfgContainer [2021-10-11 00:22:33,543 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 00:22:33,543 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 00:22:33,543 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 00:22:33,544 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 00:22:33,544 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:22:10" (3/4) ... [2021-10-11 00:22:33,546 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 00:22:33,609 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89122bb9-139b-425a-9cc3-72b50705075c/bin/uautomizer-Z5i5R5N3CC/witness.graphml [2021-10-11 00:22:33,609 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 00:22:33,611 INFO L168 Benchmark]: Toolchain (without parser) took 23535.97 ms. Allocated memory was 90.2 MB in the beginning and 184.5 MB in the end (delta: 94.4 MB). Free memory was 54.4 MB in the beginning and 131.5 MB in the end (delta: -77.1 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. [2021-10-11 00:22:33,611 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 90.2 MB. Free memory was 70.7 MB in the beginning and 70.7 MB in the end (delta: 43.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:22:33,612 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.55 ms. Allocated memory was 90.2 MB in the beginning and 119.5 MB in the end (delta: 29.4 MB). Free memory was 54.2 MB in the beginning and 94.8 MB in the end (delta: -40.6 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. [2021-10-11 00:22:33,612 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.50 ms. Allocated memory is still 119.5 MB. Free memory was 94.8 MB in the beginning and 93.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:22:33,612 INFO L168 Benchmark]: Boogie Preprocessor took 52.06 ms. Allocated memory is still 119.5 MB. Free memory was 93.4 MB in the beginning and 92.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:22:33,613 INFO L168 Benchmark]: RCFGBuilder took 393.36 ms. Allocated memory is still 119.5 MB. Free memory was 92.2 MB in the beginning and 78.0 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-11 00:22:33,613 INFO L168 Benchmark]: TraceAbstraction took 22695.56 ms. Allocated memory was 119.5 MB in the beginning and 184.5 MB in the end (delta: 65.0 MB). Free memory was 77.8 MB in the beginning and 135.6 MB in the end (delta: -57.9 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. [2021-10-11 00:22:33,614 INFO L168 Benchmark]: Witness Printer took 65.76 ms. Allocated memory is still 184.5 MB. Free memory was 135.6 MB in the beginning and 131.5 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 00:22:33,616 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 90.2 MB. Free memory was 70.7 MB in the beginning and 70.7 MB in the end (delta: 43.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 279.55 ms. Allocated memory was 90.2 MB in the beginning and 119.5 MB in the end (delta: 29.4 MB). Free memory was 54.2 MB in the beginning and 94.8 MB in the end (delta: -40.6 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.50 ms. Allocated memory is still 119.5 MB. Free memory was 94.8 MB in the beginning and 93.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 52.06 ms. Allocated memory is still 119.5 MB. Free memory was 93.4 MB in the beginning and 92.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 393.36 ms. Allocated memory is still 119.5 MB. Free memory was 92.2 MB in the beginning and 78.0 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 22695.56 ms. Allocated memory was 119.5 MB in the beginning and 184.5 MB in the end (delta: 65.0 MB). Free memory was 77.8 MB in the beginning and 135.6 MB in the end (delta: -57.9 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. * Witness Printer took 65.76 ms. Allocated memory is still 184.5 MB. Free memory was 135.6 MB in the beginning and 131.5 MB in the end (delta: 4.1 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: 39]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] struct dummy ad1[20], *ad2; [L18] int i, j, *pa; [L19] j=0 [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND FALSE !(j<20) [L23] i = __VERIFIER_nondet_int() [L24] COND TRUE i >= 0 && i < 10 [L25] ad2 = ad1 [L26] ad1[i].a = i [L27] pa = &ad1[i].a [L28] EXPR ad2[i].a [L28] i = ad2[i].a + 10 [L29] EXPR \read(*pa) [L29] COND FALSE !(i < *pa) [L12] EXPR ad1[b].a [L12] return ad1[b].a == b; [L32] COND TRUE !check(ad1, i) [L39] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 22.5s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 259 SDtfs, 210 SDslu, 1430 SDs, 0 SdLazy, 618 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 822 GetRequests, 593 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 19 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 11.4s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 1250 NumberOfCodeBlocks, 1250 NumberOfCodeBlocksAsserted, 143 NumberOfCheckSat, 1159 ConstructedInterpolants, 0 QuantifiedInterpolants, 95961 SizeOfPredicates, 0 NumberOfNonLiveVariables, 3097 ConjunctsInSsa, 228 ConjunctsInUnsatCore, 40 InterpolantComputations, 2 PerfectInterpolantSequences, 0/4940 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...