./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array26_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array26_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF --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 56ad35a361c83538323b9be55683beef9c8271c8f67221c1a0924c8496da71d0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:07:54,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:07:54,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:07:54,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:07:54,649 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:07:54,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:07:54,652 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:07:54,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:07:54,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:07:54,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:07:54,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:07:54,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:07:54,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:07:54,663 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:07:54,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:07:54,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:07:54,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:07:54,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:07:54,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:07:54,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:07:54,676 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:07:54,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:07:54,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:07:54,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:07:54,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:07:54,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:07:54,685 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:07:54,686 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:07:54,687 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:07:54,688 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:07:54,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:07:54,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:07:54,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:07:54,692 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:07:54,693 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:07:54,693 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:07:54,694 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:07:54,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:07:54,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:07:54,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:07:54,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:07:54,699 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:07:54,723 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:07:54,723 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:07:54,724 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:07:54,724 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:07:54,725 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:07:54,725 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:07:54,726 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:07:54,726 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:07:54,727 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:07:54,727 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:07:54,727 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:07:54,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:07:54,728 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:07:54,728 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:07:54,728 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:07:54,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:07:54,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:07:54,729 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:07:54,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:07:54,730 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:07:54,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:07:54,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:07:54,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:07:54,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:07:54,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:07:54,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:07:54,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:07:54,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:07:54,733 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:07:54,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:07:54,733 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:07:54,733 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:07:54,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:07:54,734 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:07:54,734 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_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56ad35a361c83538323b9be55683beef9c8271c8f67221c1a0924c8496da71d0 [2021-11-20 06:07:55,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:07:55,031 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:07:55,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:07:55,035 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:07:55,036 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:07:55,038 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-patterns/array26_pattern.c [2021-11-20 06:07:55,107 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/data/330baed7d/4272acff4a4644db8a7a2002aff79508/FLAG13e26cbb8 [2021-11-20 06:07:55,594 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:07:55,595 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/sv-benchmarks/c/array-patterns/array26_pattern.c [2021-11-20 06:07:55,601 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/data/330baed7d/4272acff4a4644db8a7a2002aff79508/FLAG13e26cbb8 [2021-11-20 06:07:55,966 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/data/330baed7d/4272acff4a4644db8a7a2002aff79508 [2021-11-20 06:07:55,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:07:55,969 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:07:55,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:07:55,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:07:55,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:07:55,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:07:55" (1/1) ... [2021-11-20 06:07:55,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3888fa05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:07:55, skipping insertion in model container [2021-11-20 06:07:55,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:07:55" (1/1) ... [2021-11-20 06:07:55,987 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:07:56,011 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:07:56,167 WARN L230 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_296c3505-c607-47d2-9c68-2beb9b1e1385/sv-benchmarks/c/array-patterns/array26_pattern.c[1324,1337] [2021-11-20 06:07:56,199 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:07:56,206 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:07:56,218 WARN L230 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_296c3505-c607-47d2-9c68-2beb9b1e1385/sv-benchmarks/c/array-patterns/array26_pattern.c[1324,1337] [2021-11-20 06:07:56,228 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:07:56,241 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:07:56,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:07:56 WrapperNode [2021-11-20 06:07:56,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:07:56,243 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:07:56,244 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:07:56,244 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:07:56,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:07:56" (1/1) ... [2021-11-20 06:07:56,258 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:07:56" (1/1) ... [2021-11-20 06:07:56,279 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2021-11-20 06:07:56,279 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:07:56,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:07:56,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:07:56,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:07:56,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:07:56" (1/1) ... [2021-11-20 06:07:56,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:07:56" (1/1) ... [2021-11-20 06:07:56,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:07:56" (1/1) ... [2021-11-20 06:07:56,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:07:56" (1/1) ... [2021-11-20 06:07:56,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:07:56" (1/1) ... [2021-11-20 06:07:56,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:07:56" (1/1) ... [2021-11-20 06:07:56,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:07:56" (1/1) ... [2021-11-20 06:07:56,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:07:56,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:07:56,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:07:56,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:07:56,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:07:56" (1/1) ... [2021-11-20 06:07:56,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:07:56,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:56,338 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:07:56,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:07:56,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:07:56,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:07:56,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:07:56,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:07:56,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:07:56,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:07:56,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:07:56,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:07:56,463 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:07:56,464 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:07:56,664 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:07:56,671 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:07:56,672 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-20 06:07:56,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:07:56 BoogieIcfgContainer [2021-11-20 06:07:56,674 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:07:56,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:07:56,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:07:56,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:07:56,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:07:55" (1/3) ... [2021-11-20 06:07:56,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78331838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:07:56, skipping insertion in model container [2021-11-20 06:07:56,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:07:56" (2/3) ... [2021-11-20 06:07:56,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78331838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:07:56, skipping insertion in model container [2021-11-20 06:07:56,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:07:56" (3/3) ... [2021-11-20 06:07:56,700 INFO L111 eAbstractionObserver]: Analyzing ICFG array26_pattern.c [2021-11-20 06:07:56,715 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:07:56,715 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:07:56,759 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:07:56,767 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:07:56,767 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:07:56,780 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:56,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:07:56,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:56,786 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:56,787 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:56,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:56,792 INFO L85 PathProgramCache]: Analyzing trace with hash -320975489, now seen corresponding path program 1 times [2021-11-20 06:07:56,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:56,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827889000] [2021-11-20 06:07:56,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:56,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:56,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:07:56,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:56,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827889000] [2021-11-20 06:07:56,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827889000] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:07:56,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:07:56,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:07:56,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251634558] [2021-11-20 06:07:56,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:07:56,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:07:56,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:56,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:07:56,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:07:56,972 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:56,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:56,988 INFO L93 Difference]: Finished difference Result 43 states and 64 transitions. [2021-11-20 06:07:56,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:07:56,990 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 06:07:56,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:56,998 INFO L225 Difference]: With dead ends: 43 [2021-11-20 06:07:56,999 INFO L226 Difference]: Without dead ends: 19 [2021-11-20 06:07:57,001 INFO L932 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 [2021-11-20 06:07:57,010 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:57,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:07:57,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-20 06:07:57,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-20 06:07:57,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:57,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-11-20 06:07:57,071 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2021-11-20 06:07:57,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:57,072 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-11-20 06:07:57,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:57,072 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-11-20 06:07:57,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:07:57,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:57,073 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:57,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:07:57,075 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:57,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:57,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1931938343, now seen corresponding path program 1 times [2021-11-20 06:07:57,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:57,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884733593] [2021-11-20 06:07:57,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:57,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:57,120 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:07:57,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208868904] [2021-11-20 06:07:57,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:57,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:57,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:57,131 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:57,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:07:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:57,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:07:57,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:57,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:07:57,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:07:57,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:57,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884733593] [2021-11-20 06:07:57,315 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:07:57,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208868904] [2021-11-20 06:07:57,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208868904] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:07:57,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:07:57,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:07:57,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094237367] [2021-11-20 06:07:57,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:07:57,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:07:57,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:57,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:07:57,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:07:57,319 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:57,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:57,343 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-11-20 06:07:57,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:07:57,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 06:07:57,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:57,347 INFO L225 Difference]: With dead ends: 26 [2021-11-20 06:07:57,348 INFO L226 Difference]: Without dead ends: 22 [2021-11-20 06:07:57,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:07:57,350 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:57,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 52 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:07:57,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-20 06:07:57,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-20 06:07:57,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:57,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-11-20 06:07:57,356 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 10 [2021-11-20 06:07:57,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:57,357 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-11-20 06:07:57,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:57,357 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-11-20 06:07:57,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 06:07:57,358 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:57,358 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:57,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:07:57,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:57,559 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:57,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:57,560 INFO L85 PathProgramCache]: Analyzing trace with hash -94215630, now seen corresponding path program 1 times [2021-11-20 06:07:57,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:57,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554227187] [2021-11-20 06:07:57,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:57,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:57,573 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:07:57,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307414498] [2021-11-20 06:07:57,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:57,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:57,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:57,579 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:57,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:07:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:57,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:07:57,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:07:57,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:07:57,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:57,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554227187] [2021-11-20 06:07:57,727 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:07:57,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307414498] [2021-11-20 06:07:57,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307414498] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:07:57,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:07:57,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:07:57,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319779348] [2021-11-20 06:07:57,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:07:57,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:07:57,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:57,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:07:57,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:07:57,735 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:57,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:57,852 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2021-11-20 06:07:57,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:07:57,853 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-20 06:07:57,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:57,854 INFO L225 Difference]: With dead ends: 54 [2021-11-20 06:07:57,870 INFO L226 Difference]: Without dead ends: 34 [2021-11-20 06:07:57,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:07:57,872 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:57,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 32 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:07:57,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-20 06:07:57,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2021-11-20 06:07:57,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:57,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2021-11-20 06:07:57,880 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 15 [2021-11-20 06:07:57,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:57,880 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2021-11-20 06:07:57,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:57,881 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2021-11-20 06:07:57,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 06:07:57,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:57,882 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:57,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:07:58,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-20 06:07:58,083 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:58,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:58,084 INFO L85 PathProgramCache]: Analyzing trace with hash -169454663, now seen corresponding path program 1 times [2021-11-20 06:07:58,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:58,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739075053] [2021-11-20 06:07:58,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:58,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:58,094 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:07:58,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [73091231] [2021-11-20 06:07:58,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:58,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:58,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:58,106 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:58,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:07:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:58,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:07:58,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:07:58,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:07:58,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:58,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739075053] [2021-11-20 06:07:58,235 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:07:58,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73091231] [2021-11-20 06:07:58,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73091231] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:07:58,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:07:58,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:07:58,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802374954] [2021-11-20 06:07:58,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:07:58,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:07:58,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:58,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:07:58,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:07:58,238 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:58,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:58,326 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2021-11-20 06:07:58,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:07:58,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-20 06:07:58,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:58,328 INFO L225 Difference]: With dead ends: 54 [2021-11-20 06:07:58,329 INFO L226 Difference]: Without dead ends: 36 [2021-11-20 06:07:58,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:07:58,331 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:58,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 17 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:07:58,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-20 06:07:58,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-11-20 06:07:58,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:58,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-11-20 06:07:58,353 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 18 [2021-11-20 06:07:58,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:58,354 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-11-20 06:07:58,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:58,354 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-11-20 06:07:58,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 06:07:58,355 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:58,356 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:58,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:07:58,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:58,556 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:58,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:58,557 INFO L85 PathProgramCache]: Analyzing trace with hash -308201553, now seen corresponding path program 1 times [2021-11-20 06:07:58,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:58,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407648765] [2021-11-20 06:07:58,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:58,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:58,567 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:07:58,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465481808] [2021-11-20 06:07:58,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:58,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:58,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:58,569 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:58,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:07:58,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:58,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:07:58,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:58,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:07:58,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:07:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:07:58,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:58,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407648765] [2021-11-20 06:07:58,851 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:07:58,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465481808] [2021-11-20 06:07:58,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465481808] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:07:58,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:07:58,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-20 06:07:58,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124328310] [2021-11-20 06:07:58,853 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:07:58,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:07:58,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:58,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:07:58,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:07:58,854 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:59,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:59,059 INFO L93 Difference]: Finished difference Result 65 states and 86 transitions. [2021-11-20 06:07:59,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:07:59,059 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-20 06:07:59,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:59,060 INFO L225 Difference]: With dead ends: 65 [2021-11-20 06:07:59,060 INFO L226 Difference]: Without dead ends: 45 [2021-11-20 06:07:59,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:07:59,062 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 112 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:59,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 26 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:07:59,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-20 06:07:59,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2021-11-20 06:07:59,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:59,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-11-20 06:07:59,071 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 21 [2021-11-20 06:07:59,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:59,071 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-11-20 06:07:59,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:59,071 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-11-20 06:07:59,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 06:07:59,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:59,073 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:59,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:07:59,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:59,286 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:07:59,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:07:59,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1610723178, now seen corresponding path program 1 times [2021-11-20 06:07:59,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:07:59,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642544996] [2021-11-20 06:07:59,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:59,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:07:59,296 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:07:59,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1741204415] [2021-11-20 06:07:59,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:07:59,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:07:59,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:07:59,298 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:07:59,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:07:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:07:59,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:07:59,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:07:59,504 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:07:59,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:07:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:07:59,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:07:59,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642544996] [2021-11-20 06:07:59,605 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:07:59,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741204415] [2021-11-20 06:07:59,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741204415] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:07:59,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:07:59,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-20 06:07:59,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607957160] [2021-11-20 06:07:59,606 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:07:59,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:07:59,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:07:59,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:07:59,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:07:59,609 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:59,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:07:59,935 INFO L93 Difference]: Finished difference Result 113 states and 152 transitions. [2021-11-20 06:07:59,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:07:59,936 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-20 06:07:59,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:07:59,937 INFO L225 Difference]: With dead ends: 113 [2021-11-20 06:07:59,937 INFO L226 Difference]: Without dead ends: 88 [2021-11-20 06:07:59,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:07:59,938 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 66 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:07:59,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 47 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:07:59,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-20 06:07:59,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 67. [2021-11-20 06:07:59,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.3333333333333333) internal successors, (88), 66 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:59,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2021-11-20 06:07:59,949 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 27 [2021-11-20 06:07:59,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:07:59,950 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2021-11-20 06:07:59,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:07:59,954 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2021-11-20 06:07:59,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 06:07:59,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:07:59,956 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:07:59,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:08:00,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 06:08:00,170 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:00,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:00,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1943339208, now seen corresponding path program 1 times [2021-11-20 06:08:00,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:00,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231764163] [2021-11-20 06:08:00,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:00,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:00,180 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:08:00,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456720905] [2021-11-20 06:08:00,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:00,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:00,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:08:00,194 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:08:00,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:08:00,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:00,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-20 06:08:00,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:08:00,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-20 06:08:00,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 06:08:00,749 INFO L354 Elim1Store]: treesize reduction 152, result has 20.4 percent of original size [2021-11-20 06:08:00,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 99 [2021-11-20 06:08:00,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:08:00,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 23 [2021-11-20 06:08:00,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:08:00,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 26 [2021-11-20 06:08:01,307 INFO L354 Elim1Store]: treesize reduction 315, result has 18.4 percent of original size [2021-11-20 06:08:01,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 95 treesize of output 134 [2021-11-20 06:08:01,342 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 06:08:01,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:08:01,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:08:01,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:08:01,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 27 [2021-11-20 06:08:01,708 INFO L354 Elim1Store]: treesize reduction 472, result has 17.6 percent of original size [2021-11-20 06:08:01,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 106 treesize of output 163 [2021-11-20 06:08:01,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:08:01,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:08:01,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:08:01,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:08:01,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:08:01,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:08:01,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 25 [2021-11-20 06:08:03,007 INFO L354 Elim1Store]: treesize reduction 168, result has 0.6 percent of original size [2021-11-20 06:08:03,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 119 treesize of output 46 [2021-11-20 06:08:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:08:03,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:08:28,771 WARN L227 SmtUtils]: Spent 5.03s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:08:29,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:08:29,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1000 treesize of output 1000 [2021-11-20 06:08:29,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 4 [2021-11-20 06:08:37,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 4 [2021-11-20 06:08:38,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 977 treesize of output 941 [2021-11-20 06:09:26,028 WARN L227 SmtUtils]: Spent 47.41s on a formula simplification. DAG size of input: 142 DAG size of output: 98 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 06:09:26,032 INFO L354 Elim1Store]: treesize reduction 260, result has 56.4 percent of original size [2021-11-20 06:09:26,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 10431359 treesize of output 9858226 [2021-11-20 06:09:51,177 WARN L227 SmtUtils]: Spent 25.14s on a formula simplification that was a NOOP. DAG size: 3013 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 06:09:51,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:51,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231764163] [2021-11-20 06:09:51,367 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:09:51,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456720905] [2021-11-20 06:09:51,367 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 06:09:51,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:51,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-20 06:09:51,368 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-11-20 06:09:51,368 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-20 06:09:51,375 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 06:09:51,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:09:51,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 06:09:51,593 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:51,596 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 06:09:51,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 06:09:51 BoogieIcfgContainer [2021-11-20 06:09:51,623 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 06:09:51,624 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 06:09:51,624 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 06:09:51,625 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 06:09:51,625 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:07:56" (3/4) ... [2021-11-20 06:09:51,628 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-20 06:09:51,628 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 06:09:51,629 INFO L158 Benchmark]: Toolchain (without parser) took 115659.09ms. Allocated memory was 115.3MB in the beginning and 257.9MB in the end (delta: 142.6MB). Free memory was 85.3MB in the beginning and 135.7MB in the end (delta: -50.4MB). Peak memory consumption was 92.1MB. Max. memory is 16.1GB. [2021-11-20 06:09:51,629 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 115.3MB. Free memory is still 68.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:09:51,629 INFO L158 Benchmark]: CACSL2BoogieTranslator took 271.56ms. Allocated memory is still 115.3MB. Free memory was 85.0MB in the beginning and 89.6MB in the end (delta: -4.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 06:09:51,630 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.42ms. Allocated memory is still 115.3MB. Free memory was 89.6MB in the beginning and 88.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:09:51,632 INFO L158 Benchmark]: Boogie Preprocessor took 24.51ms. Allocated memory is still 115.3MB. Free memory was 88.0MB in the beginning and 86.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:09:51,632 INFO L158 Benchmark]: RCFGBuilder took 368.28ms. Allocated memory is still 115.3MB. Free memory was 86.6MB in the beginning and 75.8MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 06:09:51,633 INFO L158 Benchmark]: TraceAbstraction took 114930.23ms. Allocated memory was 115.3MB in the beginning and 257.9MB in the end (delta: 142.6MB). Free memory was 75.2MB in the beginning and 136.8MB in the end (delta: -61.6MB). Peak memory consumption was 143.6MB. Max. memory is 16.1GB. [2021-11-20 06:09:51,633 INFO L158 Benchmark]: Witness Printer took 3.91ms. Allocated memory is still 257.9MB. Free memory was 136.8MB in the beginning and 135.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:09:51,641 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 115.3MB. Free memory is still 68.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 271.56ms. Allocated memory is still 115.3MB. Free memory was 85.0MB in the beginning and 89.6MB in the end (delta: -4.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.42ms. Allocated memory is still 115.3MB. Free memory was 89.6MB in the beginning and 88.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.51ms. Allocated memory is still 115.3MB. Free memory was 88.0MB in the beginning and 86.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 368.28ms. Allocated memory is still 115.3MB. Free memory was 86.6MB in the beginning and 75.8MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 114930.23ms. Allocated memory was 115.3MB in the beginning and 257.9MB in the end (delta: 142.6MB). Free memory was 75.2MB in the beginning and 136.8MB in the end (delta: -61.6MB). Peak memory consumption was 143.6MB. Max. memory is 16.1GB. * Witness Printer took 3.91ms. Allocated memory is still 257.9MB. Free memory was 136.8MB in the beginning and 135.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 34]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L38] signed long long ARR_SIZE ; [L42] ARR_SIZE = (signed long long)__VERIFIER_nondet_short() [L43] CALL assume_abort_if_not(ARR_SIZE > 1) [L32] COND FALSE !(!cond) [L43] RET assume_abort_if_not(ARR_SIZE > 1) [L45] int array[ARR_SIZE][ARR_SIZE] ; [L47] int row = 0, column = 0, num = -1, value = 1 ; [L48] signed long long sum = 0; [L51] row=0 [L51] COND TRUE row main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF 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 -> 56ad35a361c83538323b9be55683beef9c8271c8f67221c1a0924c8496da71d0 [2021-11-20 06:09:54,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:09:54,685 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:09:54,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:09:54,689 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:09:54,690 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:09:54,691 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-patterns/array26_pattern.c [2021-11-20 06:09:54,761 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/data/aebde356c/d130f23bf2a648589f9a9c2951a94f04/FLAG405f70b23 [2021-11-20 06:09:55,305 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:09:55,310 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/sv-benchmarks/c/array-patterns/array26_pattern.c [2021-11-20 06:09:55,317 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/data/aebde356c/d130f23bf2a648589f9a9c2951a94f04/FLAG405f70b23 [2021-11-20 06:09:55,681 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/data/aebde356c/d130f23bf2a648589f9a9c2951a94f04 [2021-11-20 06:09:55,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:09:55,688 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:09:55,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:09:55,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:09:55,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:09:55,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:09:55" (1/1) ... [2021-11-20 06:09:55,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24bb75c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:55, skipping insertion in model container [2021-11-20 06:09:55,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:09:55" (1/1) ... [2021-11-20 06:09:55,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:09:55,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:09:55,856 WARN L230 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_296c3505-c607-47d2-9c68-2beb9b1e1385/sv-benchmarks/c/array-patterns/array26_pattern.c[1324,1337] [2021-11-20 06:09:55,877 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:09:55,888 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:09:55,912 WARN L230 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_296c3505-c607-47d2-9c68-2beb9b1e1385/sv-benchmarks/c/array-patterns/array26_pattern.c[1324,1337] [2021-11-20 06:09:55,944 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:09:55,961 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:09:55,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:55 WrapperNode [2021-11-20 06:09:55,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:09:55,964 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:09:55,964 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:09:55,964 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:09:55,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:55" (1/1) ... [2021-11-20 06:09:55,986 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:55" (1/1) ... [2021-11-20 06:09:56,012 INFO L137 Inliner]: procedures = 18, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 77 [2021-11-20 06:09:56,012 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:09:56,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:09:56,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:09:56,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:09:56,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:55" (1/1) ... [2021-11-20 06:09:56,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:55" (1/1) ... [2021-11-20 06:09:56,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:55" (1/1) ... [2021-11-20 06:09:56,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:55" (1/1) ... [2021-11-20 06:09:56,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:55" (1/1) ... [2021-11-20 06:09:56,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:55" (1/1) ... [2021-11-20 06:09:56,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:55" (1/1) ... [2021-11-20 06:09:56,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:09:56,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:09:56,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:09:56,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:09:56,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:55" (1/1) ... [2021-11-20 06:09:56,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:09:56,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:09:56,084 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:09:56,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:09:56,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:09:56,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 06:09:56,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:09:56,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 06:09:56,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:09:56,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:09:56,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:09:56,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 06:09:56,214 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:09:56,216 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:09:56,624 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:09:56,630 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:09:56,630 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-20 06:09:56,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:09:56 BoogieIcfgContainer [2021-11-20 06:09:56,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:09:56,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:09:56,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:09:56,637 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:09:56,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:09:55" (1/3) ... [2021-11-20 06:09:56,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76b89aac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:09:56, skipping insertion in model container [2021-11-20 06:09:56,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:09:55" (2/3) ... [2021-11-20 06:09:56,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76b89aac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:09:56, skipping insertion in model container [2021-11-20 06:09:56,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:09:56" (3/3) ... [2021-11-20 06:09:56,640 INFO L111 eAbstractionObserver]: Analyzing ICFG array26_pattern.c [2021-11-20 06:09:56,645 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:09:56,645 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:09:56,691 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:09:56,698 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:09:56,698 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:09:56,718 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:56,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:09:56,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:56,724 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:56,725 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:56,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:56,734 INFO L85 PathProgramCache]: Analyzing trace with hash -320975489, now seen corresponding path program 1 times [2021-11-20 06:09:56,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:09:56,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1667829801] [2021-11-20 06:09:56,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:56,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:09:56,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:09:56,758 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:09:56,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 06:09:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:56,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 06:09:56,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:09:56,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:56,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:09:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:56,931 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:09:56,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1667829801] [2021-11-20 06:09:56,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1667829801] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:56,932 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:56,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 06:09:56,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408189105] [2021-11-20 06:09:56,935 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:56,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:09:56,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:09:56,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:09:56,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:09:56,980 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:56,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:56,998 INFO L93 Difference]: Finished difference Result 43 states and 64 transitions. [2021-11-20 06:09:56,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:09:57,001 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 06:09:57,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:57,009 INFO L225 Difference]: With dead ends: 43 [2021-11-20 06:09:57,009 INFO L226 Difference]: Without dead ends: 19 [2021-11-20 06:09:57,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:09:57,024 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:57,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:09:57,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-20 06:09:57,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-20 06:09:57,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:57,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-11-20 06:09:57,051 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2021-11-20 06:09:57,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:57,051 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-11-20 06:09:57,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:57,052 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-11-20 06:09:57,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:09:57,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:57,053 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:57,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-20 06:09:57,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:09:57,254 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:57,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:57,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1931938343, now seen corresponding path program 1 times [2021-11-20 06:09:57,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:09:57,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937163291] [2021-11-20 06:09:57,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:57,256 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:09:57,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:09:57,257 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:09:57,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 06:09:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:57,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:09:57,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:09:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:57,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:09:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:57,501 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:09:57,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937163291] [2021-11-20 06:09:57,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937163291] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:57,502 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:57,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 06:09:57,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455326519] [2021-11-20 06:09:57,502 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:57,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:09:57,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:09:57,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:09:57,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:09:57,509 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:57,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:57,575 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-11-20 06:09:57,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:57,575 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 06:09:57,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:57,581 INFO L225 Difference]: With dead ends: 26 [2021-11-20 06:09:57,582 INFO L226 Difference]: Without dead ends: 22 [2021-11-20 06:09:57,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:09:57,584 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:57,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 82 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:09:57,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-20 06:09:57,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-20 06:09:57,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:57,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-11-20 06:09:57,591 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 10 [2021-11-20 06:09:57,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:57,592 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-11-20 06:09:57,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:57,592 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-11-20 06:09:57,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 06:09:57,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:57,593 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:57,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-20 06:09:57,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:09:57,804 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:57,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:57,805 INFO L85 PathProgramCache]: Analyzing trace with hash -94215630, now seen corresponding path program 1 times [2021-11-20 06:09:57,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:09:57,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [65802774] [2021-11-20 06:09:57,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:57,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:09:57,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:09:57,809 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:09:57,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 06:09:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:57,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:09:57,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:09:58,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:09:58,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:09:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:09:58,318 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:09:58,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [65802774] [2021-11-20 06:09:58,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [65802774] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:58,319 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:58,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-20 06:09:58,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657352546] [2021-11-20 06:09:58,320 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:58,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:09:58,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:09:58,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:09:58,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:09:58,322 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:58,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:58,503 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-11-20 06:09:58,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:09:58,504 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-20 06:09:58,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:58,505 INFO L225 Difference]: With dead ends: 35 [2021-11-20 06:09:58,505 INFO L226 Difference]: Without dead ends: 23 [2021-11-20 06:09:58,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:09:58,507 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:58,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 30 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 4 Unchecked, 0.2s Time] [2021-11-20 06:09:58,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-20 06:09:58,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-20 06:09:58,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:58,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-11-20 06:09:58,512 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 15 [2021-11-20 06:09:58,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:58,513 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-11-20 06:09:58,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:58,513 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-11-20 06:09:58,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 06:09:58,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:58,514 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:58,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:09:58,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:09:58,715 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:58,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:58,716 INFO L85 PathProgramCache]: Analyzing trace with hash -169454663, now seen corresponding path program 1 times [2021-11-20 06:09:58,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:09:58,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1782661208] [2021-11-20 06:09:58,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:58,717 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:09:58,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:09:58,718 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:09:58,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 06:09:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:58,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:09:58,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:09:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:09:58,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:09:59,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:09:59,126 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:09:59,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1782661208] [2021-11-20 06:09:59,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1782661208] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:59,129 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:59,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-20 06:09:59,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454580067] [2021-11-20 06:09:59,130 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:59,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:09:59,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:09:59,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:09:59,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:09:59,134 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:59,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:59,323 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2021-11-20 06:09:59,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:09:59,324 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-20 06:09:59,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:59,325 INFO L225 Difference]: With dead ends: 42 [2021-11-20 06:09:59,325 INFO L226 Difference]: Without dead ends: 24 [2021-11-20 06:09:59,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:09:59,326 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:59,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 27 Unchecked, 0.2s Time] [2021-11-20 06:09:59,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-20 06:09:59,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-20 06:09:59,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:59,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-11-20 06:09:59,331 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 18 [2021-11-20 06:09:59,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:59,332 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-11-20 06:09:59,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:59,332 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-11-20 06:09:59,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 06:09:59,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:59,333 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:59,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:09:59,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:09:59,541 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:59,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:59,542 INFO L85 PathProgramCache]: Analyzing trace with hash -308201553, now seen corresponding path program 1 times [2021-11-20 06:09:59,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:09:59,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072221374] [2021-11-20 06:09:59,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:59,546 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:09:59,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:09:59,547 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:09:59,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 06:09:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:59,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:09:59,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:09:59,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:09:59,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:10:00,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:10:00,105 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:10:00,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072221374] [2021-11-20 06:10:00,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072221374] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:10:00,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:10:00,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-20 06:10:00,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440767702] [2021-11-20 06:10:00,109 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:10:00,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:10:00,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:10:00,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:10:00,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:10:00,112 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:00,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:00,282 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2021-11-20 06:10:00,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:10:00,284 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-20 06:10:00,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:00,284 INFO L225 Difference]: With dead ends: 45 [2021-11-20 06:10:00,284 INFO L226 Difference]: Without dead ends: 27 [2021-11-20 06:10:00,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:10:00,286 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:00,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 19 Unchecked, 0.2s Time] [2021-11-20 06:10:00,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-20 06:10:00,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-20 06:10:00,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:00,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-11-20 06:10:00,296 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 21 [2021-11-20 06:10:00,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:00,297 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-11-20 06:10:00,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:00,297 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-11-20 06:10:00,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 06:10:00,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:00,299 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:00,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:00,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:10:00,511 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:00,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:00,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1090691504, now seen corresponding path program 1 times [2021-11-20 06:10:00,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:10:00,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834375542] [2021-11-20 06:10:00,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:00,512 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:10:00,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:10:00,513 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:10:00,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 06:10:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:00,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:10:00,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:10:00,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:10:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:10:00,739 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:10:00,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834375542] [2021-11-20 06:10:00,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834375542] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:00,740 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:00,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 06:10:00,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156685427] [2021-11-20 06:10:00,740 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:00,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:10:00,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:10:00,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:10:00,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:10:00,742 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:01,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:01,071 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2021-11-20 06:10:01,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:10:01,072 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-20 06:10:01,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:01,073 INFO L225 Difference]: With dead ends: 64 [2021-11-20 06:10:01,073 INFO L226 Difference]: Without dead ends: 46 [2021-11-20 06:10:01,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:10:01,074 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:01,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 24 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:10:01,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-20 06:10:01,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2021-11-20 06:10:01,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:01,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2021-11-20 06:10:01,090 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 22 [2021-11-20 06:10:01,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:01,091 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2021-11-20 06:10:01,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:01,091 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2021-11-20 06:10:01,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 06:10:01,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:01,093 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:01,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:01,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:10:01,306 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:01,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:01,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1958262791, now seen corresponding path program 2 times [2021-11-20 06:10:01,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:10:01,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1583493047] [2021-11-20 06:10:01,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:10:01,307 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:10:01,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:10:01,310 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:10:01,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 06:10:01,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:10:01,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:10:01,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:10:01,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:01,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:10:01,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:10:01,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:10:01,536 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:10:01,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1583493047] [2021-11-20 06:10:01,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1583493047] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:10:01,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:10:01,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-20 06:10:01,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847706826] [2021-11-20 06:10:01,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:10:01,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:10:01,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:10:01,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:10:01,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:10:01,539 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:01,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:01,943 INFO L93 Difference]: Finished difference Result 110 states and 145 transitions. [2021-11-20 06:10:01,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:10:01,946 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-20 06:10:01,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:01,948 INFO L225 Difference]: With dead ends: 110 [2021-11-20 06:10:01,949 INFO L226 Difference]: Without dead ends: 88 [2021-11-20 06:10:01,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:10:01,953 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 67 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:01,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 83 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:10:01,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-20 06:10:01,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 39. [2021-11-20 06:10:01,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:01,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2021-11-20 06:10:01,963 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 24 [2021-11-20 06:10:01,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:01,964 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2021-11-20 06:10:01,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:01,964 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2021-11-20 06:10:01,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 06:10:01,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:01,965 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:01,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:02,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:10:02,178 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:02,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:02,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1982846008, now seen corresponding path program 1 times [2021-11-20 06:10:02,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:10:02,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716884409] [2021-11-20 06:10:02,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:02,179 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:10:02,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:10:02,180 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:10:02,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 06:10:02,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:02,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:10:02,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:02,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:10:02,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:10:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:10:03,287 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:10:03,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716884409] [2021-11-20 06:10:03,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716884409] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:10:03,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:10:03,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-20 06:10:03,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465132526] [2021-11-20 06:10:03,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:10:03,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:10:03,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:10:03,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:10:03,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:10:03,290 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:03,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:03,771 INFO L93 Difference]: Finished difference Result 93 states and 124 transitions. [2021-11-20 06:10:03,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:10:03,773 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-20 06:10:03,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:03,773 INFO L225 Difference]: With dead ends: 93 [2021-11-20 06:10:03,774 INFO L226 Difference]: Without dead ends: 63 [2021-11-20 06:10:03,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:10:03,775 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:03,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 30 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 89 Invalid, 0 Unknown, 18 Unchecked, 0.3s Time] [2021-11-20 06:10:03,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-20 06:10:03,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-11-20 06:10:03,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.278688524590164) internal successors, (78), 61 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:03,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2021-11-20 06:10:03,788 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 25 [2021-11-20 06:10:03,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:03,789 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2021-11-20 06:10:03,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:03,789 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2021-11-20 06:10:03,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 06:10:03,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:03,791 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:03,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-20 06:10:04,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:10:04,003 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:04,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:04,003 INFO L85 PathProgramCache]: Analyzing trace with hash -951111360, now seen corresponding path program 2 times [2021-11-20 06:10:04,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:10:04,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1947695879] [2021-11-20 06:10:04,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:10:04,004 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:10:04,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:10:04,005 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:10:04,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 06:10:04,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:10:04,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:10:04,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:10:04,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:04,489 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:10:04,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:10:04,680 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:10:04,681 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:10:04,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1947695879] [2021-11-20 06:10:04,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1947695879] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:10:04,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:10:04,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-20 06:10:04,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345117156] [2021-11-20 06:10:04,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:10:04,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:10:04,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:10:04,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:10:04,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:10:04,683 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:04,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:04,842 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2021-11-20 06:10:04,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:10:04,843 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-20 06:10:04,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:04,844 INFO L225 Difference]: With dead ends: 86 [2021-11-20 06:10:04,844 INFO L226 Difference]: Without dead ends: 74 [2021-11-20 06:10:04,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:10:04,844 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:04,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 40 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2021-11-20 06:10:04,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-20 06:10:04,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2021-11-20 06:10:04,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.271186440677966) internal successors, (75), 59 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:04,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2021-11-20 06:10:04,854 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 28 [2021-11-20 06:10:04,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:04,855 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2021-11-20 06:10:04,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:04,855 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2021-11-20 06:10:04,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 06:10:04,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:04,856 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:04,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:05,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:10:05,068 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:05,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:05,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1335460331, now seen corresponding path program 3 times [2021-11-20 06:10:05,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:10:05,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656211215] [2021-11-20 06:10:05,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:10:05,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:10:05,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:10:05,070 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:10:05,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 06:10:05,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 06:10:05,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:10:05,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:10:05,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:05,509 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 06:10:05,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:10:05,723 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 06:10:05,724 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:10:05,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656211215] [2021-11-20 06:10:05,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656211215] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:10:05,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:10:05,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-20 06:10:05,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162566344] [2021-11-20 06:10:05,725 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:10:05,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:10:05,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:10:05,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:10:05,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:10:05,726 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:05,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:05,753 INFO L93 Difference]: Finished difference Result 91 states and 116 transitions. [2021-11-20 06:10:05,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:10:05,754 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-20 06:10:05,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:05,758 INFO L225 Difference]: With dead ends: 91 [2021-11-20 06:10:05,758 INFO L226 Difference]: Without dead ends: 87 [2021-11-20 06:10:05,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:10:05,760 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:05,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 47 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2021-11-20 06:10:05,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-20 06:10:05,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2021-11-20 06:10:05,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.3095238095238095) internal successors, (110), 84 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:05,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2021-11-20 06:10:05,786 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 31 [2021-11-20 06:10:05,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:05,787 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2021-11-20 06:10:05,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:05,787 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2021-11-20 06:10:05,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 06:10:05,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:05,793 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:05,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:05,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:10:05,998 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:05,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:05,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1026825090, now seen corresponding path program 4 times [2021-11-20 06:10:05,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:10:05,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25322193] [2021-11-20 06:10:05,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:10:05,999 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:10:05,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:10:06,000 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:10:06,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 06:10:06,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:10:06,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:10:06,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:10:06,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:06,635 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:10:06,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:10:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:10:06,999 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:10:06,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25322193] [2021-11-20 06:10:06,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25322193] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:10:07,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:10:07,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-11-20 06:10:07,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896988412] [2021-11-20 06:10:07,000 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:10:07,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:10:07,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:10:07,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:10:07,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:10:07,002 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:07,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:07,996 INFO L93 Difference]: Finished difference Result 229 states and 306 transitions. [2021-11-20 06:10:07,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 06:10:07,997 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-20 06:10:07,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:07,998 INFO L225 Difference]: With dead ends: 229 [2021-11-20 06:10:07,998 INFO L226 Difference]: Without dead ends: 174 [2021-11-20 06:10:07,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:10:07,999 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 94 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:08,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 118 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 80 Invalid, 0 Unknown, 103 Unchecked, 0.2s Time] [2021-11-20 06:10:08,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-20 06:10:08,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 153. [2021-11-20 06:10:08,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.3157894736842106) internal successors, (200), 152 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:08,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 200 transitions. [2021-11-20 06:10:08,022 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 200 transitions. Word has length 34 [2021-11-20 06:10:08,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:08,022 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 200 transitions. [2021-11-20 06:10:08,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:08,023 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 200 transitions. [2021-11-20 06:10:08,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 06:10:08,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:08,024 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:08,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:08,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:10:08,238 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:08,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:08,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1329887459, now seen corresponding path program 5 times [2021-11-20 06:10:08,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:10:08,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2131190369] [2021-11-20 06:10:08,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:10:08,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:10:08,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:10:08,240 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:10:08,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 06:10:08,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-20 06:10:08,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:10:08,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:10:08,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:08,452 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:10:08,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:10:08,564 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:10:08,564 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:10:08,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2131190369] [2021-11-20 06:10:08,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2131190369] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:10:08,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:10:08,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-11-20 06:10:08,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875779048] [2021-11-20 06:10:08,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:10:08,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:10:08,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:10:08,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:10:08,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:10:08,566 INFO L87 Difference]: Start difference. First operand 153 states and 200 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:08,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:08,756 INFO L93 Difference]: Finished difference Result 222 states and 292 transitions. [2021-11-20 06:10:08,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:10:08,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-20 06:10:08,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:08,758 INFO L225 Difference]: With dead ends: 222 [2021-11-20 06:10:08,758 INFO L226 Difference]: Without dead ends: 157 [2021-11-20 06:10:08,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:10:08,759 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:08,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 26 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:10:08,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-20 06:10:08,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 150. [2021-11-20 06:10:08,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.2751677852348993) internal successors, (190), 149 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:08,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 190 transitions. [2021-11-20 06:10:08,778 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 190 transitions. Word has length 35 [2021-11-20 06:10:08,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:08,779 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 190 transitions. [2021-11-20 06:10:08,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:08,779 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 190 transitions. [2021-11-20 06:10:08,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 06:10:08,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:08,780 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:08,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:08,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:10:08,992 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:08,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:08,992 INFO L85 PathProgramCache]: Analyzing trace with hash -863664749, now seen corresponding path program 1 times [2021-11-20 06:10:08,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:10:08,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557820909] [2021-11-20 06:10:08,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:08,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:10:08,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:10:08,993 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:10:08,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 06:10:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:09,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:10:09,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:10:09,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:10:09,945 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:10:09,945 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:10:09,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557820909] [2021-11-20 06:10:09,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [557820909] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:10:09,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:10:09,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-11-20 06:10:09,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883346658] [2021-11-20 06:10:09,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:10:09,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:10:09,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:10:09,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:10:09,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:10:09,947 INFO L87 Difference]: Start difference. First operand 150 states and 190 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:10,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:10,523 INFO L93 Difference]: Finished difference Result 300 states and 394 transitions. [2021-11-20 06:10:10,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 06:10:10,524 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-20 06:10:10,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:10,526 INFO L225 Difference]: With dead ends: 300 [2021-11-20 06:10:10,526 INFO L226 Difference]: Without dead ends: 287 [2021-11-20 06:10:10,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:10:10,527 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 83 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:10,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 74 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 95 Invalid, 0 Unknown, 94 Unchecked, 0.4s Time] [2021-11-20 06:10:10,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-20 06:10:10,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 225. [2021-11-20 06:10:10,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.3258928571428572) internal successors, (297), 224 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:10,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 297 transitions. [2021-11-20 06:10:10,550 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 297 transitions. Word has length 36 [2021-11-20 06:10:10,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:10,550 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 297 transitions. [2021-11-20 06:10:10,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:10,551 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 297 transitions. [2021-11-20 06:10:10,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 06:10:10,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:10,552 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:10,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:10,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:10:10,765 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:10,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:10,765 INFO L85 PathProgramCache]: Analyzing trace with hash -892878219, now seen corresponding path program 2 times [2021-11-20 06:10:10,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:10:10,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1301379734] [2021-11-20 06:10:10,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:10:10,766 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:10:10,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:10:10,767 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:10:10,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 06:10:10,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:10:10,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:10:10,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:10:10,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 06:10:11,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:10:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 06:10:11,532 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:10:11,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1301379734] [2021-11-20 06:10:11,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1301379734] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:10:11,532 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:10:11,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-20 06:10:11,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804270114] [2021-11-20 06:10:11,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:10:11,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:10:11,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:10:11,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:10:11,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:10:11,534 INFO L87 Difference]: Start difference. First operand 225 states and 297 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:11,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:11,563 INFO L93 Difference]: Finished difference Result 245 states and 321 transitions. [2021-11-20 06:10:11,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:10:11,564 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-20 06:10:11,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:11,566 INFO L225 Difference]: With dead ends: 245 [2021-11-20 06:10:11,566 INFO L226 Difference]: Without dead ends: 241 [2021-11-20 06:10:11,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:10:11,567 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:11,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 36 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 22 Unchecked, 0.0s Time] [2021-11-20 06:10:11,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-20 06:10:11,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 171. [2021-11-20 06:10:11,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.2941176470588236) internal successors, (220), 170 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:11,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 220 transitions. [2021-11-20 06:10:11,596 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 220 transitions. Word has length 38 [2021-11-20 06:10:11,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:11,596 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 220 transitions. [2021-11-20 06:10:11,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:11,596 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 220 transitions. [2021-11-20 06:10:11,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 06:10:11,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:11,598 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:11,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:11,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:10:11,811 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:11,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:11,812 INFO L85 PathProgramCache]: Analyzing trace with hash 54280905, now seen corresponding path program 6 times [2021-11-20 06:10:11,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:10:11,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1535394396] [2021-11-20 06:10:11,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:10:11,812 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:10:11,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:10:11,815 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:10:11,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-20 06:10:11,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-20 06:10:11,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:10:11,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:10:11,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:12,463 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:10:12,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:10:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:10:12,938 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:10:12,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1535394396] [2021-11-20 06:10:12,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1535394396] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:10:12,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:10:12,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-11-20 06:10:12,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296137872] [2021-11-20 06:10:12,939 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:10:12,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:10:12,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:10:12,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:10:12,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:10:12,940 INFO L87 Difference]: Start difference. First operand 171 states and 220 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:14,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:14,669 INFO L93 Difference]: Finished difference Result 248 states and 324 transitions. [2021-11-20 06:10:14,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 06:10:14,670 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-20 06:10:14,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:14,671 INFO L225 Difference]: With dead ends: 248 [2021-11-20 06:10:14,671 INFO L226 Difference]: Without dead ends: 230 [2021-11-20 06:10:14,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2021-11-20 06:10:14,673 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 34 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:14,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 67 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 136 Invalid, 0 Unknown, 143 Unchecked, 0.9s Time] [2021-11-20 06:10:14,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-20 06:10:14,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 211. [2021-11-20 06:10:14,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.3047619047619048) internal successors, (274), 210 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:14,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 274 transitions. [2021-11-20 06:10:14,700 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 274 transitions. Word has length 38 [2021-11-20 06:10:14,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:14,703 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 274 transitions. [2021-11-20 06:10:14,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:14,704 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 274 transitions. [2021-11-20 06:10:14,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 06:10:14,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:14,706 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:14,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:14,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:10:14,914 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:14,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:14,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1562296134, now seen corresponding path program 7 times [2021-11-20 06:10:14,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:10:14,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1823184044] [2021-11-20 06:10:14,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:10:14,915 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:10:14,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:10:14,916 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:10:14,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-20 06:10:15,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:15,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:10:15,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:15,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 06:10:15,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 8 [2021-11-20 06:10:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:10:15,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:10:16,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2021-11-20 06:10:16,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 103 [2021-11-20 06:10:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:10:37,673 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:10:37,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1823184044] [2021-11-20 06:10:37,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1823184044] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:10:37,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:10:37,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-11-20 06:10:37,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445703430] [2021-11-20 06:10:37,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:10:37,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 06:10:37,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:10:37,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 06:10:37,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=298, Unknown=1, NotChecked=0, Total=380 [2021-11-20 06:10:37,676 INFO L87 Difference]: Start difference. First operand 211 states and 274 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:42,685 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:10:44,750 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:10:46,758 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:10:48,826 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:10:49,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:49,151 INFO L93 Difference]: Finished difference Result 401 states and 530 transitions. [2021-11-20 06:10:49,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:10:49,152 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-20 06:10:49,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:49,153 INFO L225 Difference]: With dead ends: 401 [2021-11-20 06:10:49,154 INFO L226 Difference]: Without dead ends: 268 [2021-11-20 06:10:49,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=124, Invalid=475, Unknown=1, NotChecked=0, Total=600 [2021-11-20 06:10:49,155 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 58 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 26 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:49,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 115 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 345 Invalid, 4 Unknown, 144 Unchecked, 10.6s Time] [2021-11-20 06:10:49,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-20 06:10:49,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 206. [2021-11-20 06:10:49,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.3121951219512196) internal successors, (269), 205 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:49,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 269 transitions. [2021-11-20 06:10:49,180 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 269 transitions. Word has length 41 [2021-11-20 06:10:49,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:49,181 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 269 transitions. [2021-11-20 06:10:49,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:49,181 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 269 transitions. [2021-11-20 06:10:49,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 06:10:49,182 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:49,182 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:49,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:49,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:10:49,395 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:49,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:49,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1918519550, now seen corresponding path program 8 times [2021-11-20 06:10:49,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:10:49,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1150350720] [2021-11-20 06:10:49,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:10:49,397 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:10:49,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:10:49,397 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:10:49,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-20 06:10:49,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:10:49,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:10:49,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:10:49,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 06:10:49,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:10:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 06:10:50,217 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:10:50,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1150350720] [2021-11-20 06:10:50,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1150350720] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:10:50,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:10:50,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 14 [2021-11-20 06:10:50,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199448180] [2021-11-20 06:10:50,217 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:10:50,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:10:50,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:10:50,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:10:50,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:10:50,218 INFO L87 Difference]: Start difference. First operand 206 states and 269 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:50,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:50,842 INFO L93 Difference]: Finished difference Result 517 states and 696 transitions. [2021-11-20 06:10:50,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:10:50,843 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-20 06:10:50,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:50,845 INFO L225 Difference]: With dead ends: 517 [2021-11-20 06:10:50,845 INFO L226 Difference]: Without dead ends: 393 [2021-11-20 06:10:50,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:10:50,847 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:50,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 46 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 68 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2021-11-20 06:10:50,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-11-20 06:10:50,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 347. [2021-11-20 06:10:50,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.3323699421965318) internal successors, (461), 346 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:50,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 461 transitions. [2021-11-20 06:10:50,884 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 461 transitions. Word has length 41 [2021-11-20 06:10:50,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:50,885 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 461 transitions. [2021-11-20 06:10:50,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:50,885 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 461 transitions. [2021-11-20 06:10:50,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 06:10:50,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:50,887 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:50,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-20 06:10:51,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:10:51,099 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:51,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:51,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1445241358, now seen corresponding path program 3 times [2021-11-20 06:10:51,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:10:51,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018293240] [2021-11-20 06:10:51,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:10:51,100 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:10:51,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:10:51,101 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:10:51,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-20 06:10:51,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:10:51,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:10:51,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:10:51,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:51,622 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 06:10:51,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:10:52,000 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 06:10:52,001 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:10:52,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018293240] [2021-11-20 06:10:52,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018293240] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:10:52,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:10:52,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-11-20 06:10:52,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060200051] [2021-11-20 06:10:52,002 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:10:52,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:10:52,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:10:52,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:10:52,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:10:52,003 INFO L87 Difference]: Start difference. First operand 347 states and 461 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:52,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:52,110 INFO L93 Difference]: Finished difference Result 395 states and 522 transitions. [2021-11-20 06:10:52,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:10:52,113 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-20 06:10:52,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:52,115 INFO L225 Difference]: With dead ends: 395 [2021-11-20 06:10:52,115 INFO L226 Difference]: Without dead ends: 382 [2021-11-20 06:10:52,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:10:52,116 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:52,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 53 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2021-11-20 06:10:52,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-20 06:10:52,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 356. [2021-11-20 06:10:52,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.3267605633802817) internal successors, (471), 355 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:52,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 471 transitions. [2021-11-20 06:10:52,162 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 471 transitions. Word has length 42 [2021-11-20 06:10:52,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:52,162 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 471 transitions. [2021-11-20 06:10:52,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:52,162 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 471 transitions. [2021-11-20 06:10:52,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 06:10:52,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:52,164 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:52,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:52,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:10:52,375 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:52,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:52,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1047114612, now seen corresponding path program 4 times [2021-11-20 06:10:52,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:10:52,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672751708] [2021-11-20 06:10:52,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:10:52,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:10:52,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:10:52,377 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:10:52,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-20 06:10:52,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:10:52,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:10:52,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:10:52,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:52,991 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 7 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:10:52,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:10:53,343 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 31 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 06:10:53,343 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:10:53,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672751708] [2021-11-20 06:10:53,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672751708] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:10:53,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:10:53,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-11-20 06:10:53,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485711175] [2021-11-20 06:10:53,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:10:53,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:10:53,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:10:53,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:10:53,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:10:53,347 INFO L87 Difference]: Start difference. First operand 356 states and 471 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:54,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:54,040 INFO L93 Difference]: Finished difference Result 777 states and 1046 transitions. [2021-11-20 06:10:54,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:10:54,041 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-20 06:10:54,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:54,046 INFO L225 Difference]: With dead ends: 777 [2021-11-20 06:10:54,046 INFO L226 Difference]: Without dead ends: 739 [2021-11-20 06:10:54,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:10:54,047 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:54,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 115 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2021-11-20 06:10:54,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-11-20 06:10:54,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 607. [2021-11-20 06:10:54,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 1.3481848184818481) internal successors, (817), 606 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:54,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 817 transitions. [2021-11-20 06:10:54,109 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 817 transitions. Word has length 44 [2021-11-20 06:10:54,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:54,110 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 817 transitions. [2021-11-20 06:10:54,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:54,110 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 817 transitions. [2021-11-20 06:10:54,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 06:10:54,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:54,112 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:54,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:54,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:10:54,325 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:54,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:54,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1943339208, now seen corresponding path program 5 times [2021-11-20 06:10:54,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:10:54,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926166448] [2021-11-20 06:10:54,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:10:54,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:10:54,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:10:54,331 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:10:54,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296c3505-c607-47d2-9c68-2beb9b1e1385/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-20 06:10:54,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-20 06:10:54,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:10:54,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-20 06:10:54,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:54,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 06:10:55,611 INFO L354 Elim1Store]: treesize reduction 70, result has 20.5 percent of original size [2021-11-20 06:10:55,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2021-11-20 06:10:58,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:10:58,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:10:58,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:10:58,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:10:58,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2021-11-20 06:10:59,246 INFO L354 Elim1Store]: treesize reduction 250, result has 16.1 percent of original size [2021-11-20 06:10:59,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 81 [2021-11-20 06:11:06,436 INFO L354 Elim1Store]: treesize reduction 279, result has 2.4 percent of original size [2021-11-20 06:11:06,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 93 treesize of output 42 [2021-11-20 06:11:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:11:06,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:11:42,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 530 treesize of output 514 [2021-11-20 06:11:43,151 INFO L354 Elim1Store]: treesize reduction 87, result has 1.1 percent of original size [2021-11-20 06:11:43,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 235707138 treesize of output 230202114 [2021-11-20 06:21:18,539 WARN L227 SmtUtils]: Spent 9.59m on a formula simplification that was a NOOP. DAG size: 5691 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)