./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i25_o25-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i25_o25-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD --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 76955366716759eb9478710f6ef46e3de93d252b9c3177ff4beaca56ee5c75a7 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:13:11,855 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:13:11,858 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:13:11,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:13:11,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:13:11,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:13:11,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:13:11,909 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:13:11,912 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:13:11,913 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:13:11,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:13:11,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:13:11,917 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:13:11,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:13:11,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:13:11,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:13:11,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:13:11,932 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:13:11,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:13:11,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:13:11,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:13:11,946 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:13:11,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:13:11,954 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:13:11,958 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:13:11,963 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:13:11,964 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:13:11,965 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:13:11,965 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:13:11,968 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:13:11,970 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:13:11,971 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:13:11,972 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:13:11,974 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:13:11,975 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:13:11,976 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:13:11,978 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:13:11,978 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:13:11,978 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:13:11,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:13:11,980 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:13:11,981 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 23:13:12,029 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:13:12,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:13:12,030 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:13:12,030 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:13:12,031 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:13:12,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:13:12,032 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:13:12,032 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:13:12,032 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:13:12,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:13:12,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:13:12,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:13:12,033 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 23:13:12,033 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:13:12,034 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 23:13:12,034 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:13:12,034 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:13:12,034 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:13:12,034 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 23:13:12,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:13:12,035 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:13:12,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:13:12,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:13:12,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:13:12,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:13:12,036 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 23:13:12,036 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:13:12,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:13:12,037 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 23:13:12,037 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 23:13:12,037 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 23:13:12,037 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:13:12,037 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_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76955366716759eb9478710f6ef46e3de93d252b9c3177ff4beaca56ee5c75a7 [2021-10-28 23:13:12,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:13:12,367 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:13:12,370 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:13:12,371 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:13:12,372 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:13:12,373 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/recursive-simple/id_i25_o25-2.c [2021-10-28 23:13:12,471 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/data/e1609764e/cd26b7f59963483e90ed5b7bcc7100a1/FLAGa3a95fbbf [2021-10-28 23:13:12,968 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:13:12,969 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/sv-benchmarks/c/recursive-simple/id_i25_o25-2.c [2021-10-28 23:13:12,974 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/data/e1609764e/cd26b7f59963483e90ed5b7bcc7100a1/FLAGa3a95fbbf [2021-10-28 23:13:13,351 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/data/e1609764e/cd26b7f59963483e90ed5b7bcc7100a1 [2021-10-28 23:13:13,353 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:13:13,355 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:13:13,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:13:13,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:13:13,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:13:13,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:13:13" (1/1) ... [2021-10-28 23:13:13,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7116319b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:13:13, skipping insertion in model container [2021-10-28 23:13:13,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:13:13" (1/1) ... [2021-10-28 23:13:13,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:13:13,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:13:13,552 WARN L228 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_61682736-bd0e-47eb-a108-ee1b7a3260dc/sv-benchmarks/c/recursive-simple/id_i25_o25-2.c[454,467] [2021-10-28 23:13:13,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:13:13,563 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:13:13,576 WARN L228 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_61682736-bd0e-47eb-a108-ee1b7a3260dc/sv-benchmarks/c/recursive-simple/id_i25_o25-2.c[454,467] [2021-10-28 23:13:13,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:13:13,593 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:13:13,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:13:13 WrapperNode [2021-10-28 23:13:13,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:13:13,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:13:13,599 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:13:13,599 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:13:13,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:13:13" (1/1) ... [2021-10-28 23:13:13,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:13:13" (1/1) ... [2021-10-28 23:13:13,629 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:13:13,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:13:13,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:13:13,631 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:13:13,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:13:13" (1/1) ... [2021-10-28 23:13:13,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:13:13" (1/1) ... [2021-10-28 23:13:13,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:13:13" (1/1) ... [2021-10-28 23:13:13,642 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:13:13" (1/1) ... [2021-10-28 23:13:13,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:13:13" (1/1) ... [2021-10-28 23:13:13,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:13:13" (1/1) ... [2021-10-28 23:13:13,648 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:13:13" (1/1) ... [2021-10-28 23:13:13,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:13:13,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:13:13,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:13:13,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:13:13,653 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:13:13" (1/1) ... [2021-10-28 23:13:13,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:13:13,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:13:13,688 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:13:13,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:13:13,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:13:13,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:13:13,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:13:13,751 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-10-28 23:13:13,751 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-10-28 23:13:13,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:13:13,977 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:13:13,977 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-28 23:13:13,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:13:13 BoogieIcfgContainer [2021-10-28 23:13:13,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:13:13,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:13:13,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:13:13,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:13:13,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:13:13" (1/3) ... [2021-10-28 23:13:13,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68572e1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:13:13, skipping insertion in model container [2021-10-28 23:13:13,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:13:13" (2/3) ... [2021-10-28 23:13:13,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68572e1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:13:13, skipping insertion in model container [2021-10-28 23:13:13,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:13:13" (3/3) ... [2021-10-28 23:13:14,004 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i25_o25-2.c [2021-10-28 23:13:14,013 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:13:14,013 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 23:13:14,065 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:13:14,071 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 [2021-10-28 23:13:14,072 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 23:13:14,088 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 23:13:14,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 23:13:14,093 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:13:14,094 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:13:14,095 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:13:14,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:13:14,101 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-10-28 23:13:14,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:13:14,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843148315] [2021-10-28 23:13:14,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:13:14,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:13:14,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:14,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:14,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:13:14,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:13:14,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843148315] [2021-10-28 23:13:14,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843148315] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:13:14,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:13:14,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:13:14,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754356432] [2021-10-28 23:13:14,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:13:14,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:13:14,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:13:14,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:13:14,430 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:13:14,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:13:14,470 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-10-28 23:13:14,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:13:14,473 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-28 23:13:14,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:13:14,498 INFO L225 Difference]: With dead ends: 28 [2021-10-28 23:13:14,498 INFO L226 Difference]: Without dead ends: 15 [2021-10-28 23:13:14,501 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:13:14,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-28 23:13:14,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-28 23:13:14,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 23:13:14,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-10-28 23:13:14,562 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-10-28 23:13:14,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:13:14,563 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-10-28 23:13:14,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:13:14,563 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-10-28 23:13:14,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 23:13:14,565 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:13:14,566 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:13:14,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:13:14,566 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:13:14,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:13:14,582 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-10-28 23:13:14,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:13:14,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534610829] [2021-10-28 23:13:14,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:13:14,584 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:13:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:14,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:14,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 23:13:14,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:13:14,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534610829] [2021-10-28 23:13:14,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534610829] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:14,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884588234] [2021-10-28 23:13:14,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:13:14,797 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:14,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:13:14,800 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:13:14,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:13:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:14,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 23:13:14,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:13:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 23:13:14,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884588234] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:14,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:13:14,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-10-28 23:13:14,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781220791] [2021-10-28 23:13:14,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:13:14,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:13:14,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:13:14,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:13:14,982 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 23:13:15,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:13:15,027 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-10-28 23:13:15,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:13:15,027 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 16 [2021-10-28 23:13:15,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:13:15,029 INFO L225 Difference]: With dead ends: 22 [2021-10-28 23:13:15,029 INFO L226 Difference]: Without dead ends: 18 [2021-10-28 23:13:15,030 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:13:15,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-28 23:13:15,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-28 23:13:15,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 23:13:15,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-10-28 23:13:15,036 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-10-28 23:13:15,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:13:15,036 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-10-28 23:13:15,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 23:13:15,037 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-10-28 23:13:15,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 23:13:15,038 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:13:15,038 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:13:15,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:13:15,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:15,255 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:13:15,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:13:15,256 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-10-28 23:13:15,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:13:15,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795092822] [2021-10-28 23:13:15,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:13:15,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:13:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:15,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:15,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:15,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:15,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 23:13:15,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:13:15,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795092822] [2021-10-28 23:13:15,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795092822] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:15,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183034100] [2021-10-28 23:13:15,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:13:15,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:15,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:13:15,461 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:13:15,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 23:13:15,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:13:15,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:13:15,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 23:13:15,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:13:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 23:13:15,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183034100] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:15,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:13:15,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-10-28 23:13:15,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372780943] [2021-10-28 23:13:15,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:13:15,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:13:15,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:13:15,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:13:15,634 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 23:13:15,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:13:15,697 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-10-28 23:13:15,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:13:15,698 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 22 [2021-10-28 23:13:15,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:13:15,699 INFO L225 Difference]: With dead ends: 25 [2021-10-28 23:13:15,700 INFO L226 Difference]: Without dead ends: 21 [2021-10-28 23:13:15,700 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:13:15,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-28 23:13:15,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-10-28 23:13:15,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 23:13:15,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-10-28 23:13:15,706 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2021-10-28 23:13:15,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:13:15,706 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-10-28 23:13:15,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 23:13:15,707 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-10-28 23:13:15,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 23:13:15,708 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:13:15,708 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:13:15,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:13:15,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:15,930 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:13:15,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:13:15,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2021-10-28 23:13:15,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:13:15,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115307370] [2021-10-28 23:13:15,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:13:15,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:13:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:15,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:16,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:16,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:16,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:16,081 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 23:13:16,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:13:16,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115307370] [2021-10-28 23:13:16,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115307370] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:16,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827318260] [2021-10-28 23:13:16,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:13:16,083 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:16,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:13:16,099 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:13:16,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 23:13:16,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 23:13:16,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:13:16,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 23:13:16,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:13:16,412 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 23:13:16,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827318260] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:16,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:13:16,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-10-28 23:13:16,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297932863] [2021-10-28 23:13:16,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 23:13:16,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:13:16,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 23:13:16,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-10-28 23:13:16,417 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 8 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) [2021-10-28 23:13:16,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:13:16,578 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-10-28 23:13:16,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:13:16,579 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 8 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) Word has length 28 [2021-10-28 23:13:16,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:13:16,582 INFO L225 Difference]: With dead ends: 28 [2021-10-28 23:13:16,582 INFO L226 Difference]: Without dead ends: 24 [2021-10-28 23:13:16,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-10-28 23:13:16,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-28 23:13:16,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-28 23:13:16,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-28 23:13:16,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-10-28 23:13:16,594 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2021-10-28 23:13:16,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:13:16,594 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-10-28 23:13:16,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 8 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) [2021-10-28 23:13:16,595 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-10-28 23:13:16,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 23:13:16,598 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:13:16,601 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:13:16,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:13:16,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:16,815 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:13:16,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:13:16,815 INFO L85 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2021-10-28 23:13:16,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:13:16,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497185886] [2021-10-28 23:13:16,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:13:16,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:13:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:16,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:16,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:16,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:16,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:16,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:17,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:17,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-28 23:13:17,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:13:17,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497185886] [2021-10-28 23:13:17,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497185886] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:17,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776326515] [2021-10-28 23:13:17,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:13:17,033 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:17,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:13:17,034 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:13:17,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 23:13:17,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:13:17,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:13:17,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 23:13:17,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:13:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-28 23:13:17,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776326515] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:17,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:13:17,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-10-28 23:13:17,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862473411] [2021-10-28 23:13:17,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 23:13:17,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:13:17,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 23:13:17,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:13:17,307 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2021-10-28 23:13:17,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:13:17,385 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-10-28 23:13:17,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:13:17,386 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 34 [2021-10-28 23:13:17,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:13:17,388 INFO L225 Difference]: With dead ends: 31 [2021-10-28 23:13:17,388 INFO L226 Difference]: Without dead ends: 27 [2021-10-28 23:13:17,389 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:13:17,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-28 23:13:17,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-28 23:13:17,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-28 23:13:17,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-28 23:13:17,403 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2021-10-28 23:13:17,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:13:17,404 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-28 23:13:17,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2021-10-28 23:13:17,404 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-28 23:13:17,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 23:13:17,409 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:13:17,409 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:13:17,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:13:17,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:17,623 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:13:17,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:13:17,624 INFO L85 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2021-10-28 23:13:17,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:13:17,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032501563] [2021-10-28 23:13:17,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:13:17,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:13:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:17,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:17,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:17,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:17,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:17,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:17,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-28 23:13:17,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:13:17,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032501563] [2021-10-28 23:13:17,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032501563] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:17,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741760633] [2021-10-28 23:13:17,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:13:17,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:17,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:13:17,851 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:13:17,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 23:13:17,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-28 23:13:17,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:13:17,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 23:13:17,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:13:18,122 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-28 23:13:18,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741760633] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:18,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:13:18,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-10-28 23:13:18,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825303138] [2021-10-28 23:13:18,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:13:18,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:13:18,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:13:18,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:13:18,127 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2021-10-28 23:13:18,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:13:18,217 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-10-28 23:13:18,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:13:18,218 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) Word has length 40 [2021-10-28 23:13:18,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:13:18,220 INFO L225 Difference]: With dead ends: 34 [2021-10-28 23:13:18,220 INFO L226 Difference]: Without dead ends: 30 [2021-10-28 23:13:18,221 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:13:18,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-28 23:13:18,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-28 23:13:18,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2021-10-28 23:13:18,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-10-28 23:13:18,234 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2021-10-28 23:13:18,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:13:18,237 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-10-28 23:13:18,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2021-10-28 23:13:18,240 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-10-28 23:13:18,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 23:13:18,242 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:13:18,242 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:13:18,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:13:18,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:18,459 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:13:18,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:13:18,459 INFO L85 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2021-10-28 23:13:18,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:13:18,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548583500] [2021-10-28 23:13:18,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:13:18,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:13:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:18,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:18,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:18,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:18,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:18,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:18,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:18,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:18,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:18,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:18,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:18,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:18,651 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-10-28 23:13:18,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:13:18,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548583500] [2021-10-28 23:13:18,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548583500] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:18,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834311545] [2021-10-28 23:13:18,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:13:18,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:18,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:13:18,663 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:13:18,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 23:13:18,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-28 23:13:18,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:13:18,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 23:13:18,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:13:19,103 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-10-28 23:13:19,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834311545] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:19,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:13:19,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 26 [2021-10-28 23:13:19,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641545755] [2021-10-28 23:13:19,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-28 23:13:19,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:13:19,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-28 23:13:19,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-10-28 23:13:19,107 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 26 states, 25 states have (on average 1.6) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (4), 1 states have call predecessors, (4), 14 states have return successors, (14), 14 states have call predecessors, (14), 3 states have call successors, (14) [2021-10-28 23:13:19,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:13:19,374 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-10-28 23:13:19,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 23:13:19,374 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.6) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (4), 1 states have call predecessors, (4), 14 states have return successors, (14), 14 states have call predecessors, (14), 3 states have call successors, (14) Word has length 46 [2021-10-28 23:13:19,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:13:19,375 INFO L225 Difference]: With dead ends: 37 [2021-10-28 23:13:19,375 INFO L226 Difference]: Without dead ends: 33 [2021-10-28 23:13:19,377 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=279, Invalid=1203, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 23:13:19,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-28 23:13:19,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-28 23:13:19,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2021-10-28 23:13:19,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-10-28 23:13:19,382 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2021-10-28 23:13:19,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:13:19,382 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-10-28 23:13:19,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.6) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (4), 1 states have call predecessors, (4), 14 states have return successors, (14), 14 states have call predecessors, (14), 3 states have call successors, (14) [2021-10-28 23:13:19,383 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-10-28 23:13:19,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-28 23:13:19,384 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:13:19,384 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:13:19,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:13:19,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-28 23:13:19,597 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:13:19,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:13:19,598 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2021-10-28 23:13:19,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:13:19,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674936676] [2021-10-28 23:13:19,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:13:19,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:13:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:19,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:19,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:19,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:19,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:19,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:19,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:19,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:19,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:19,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:19,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:19,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:19,863 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-10-28 23:13:19,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:13:19,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674936676] [2021-10-28 23:13:19,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674936676] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:19,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21789760] [2021-10-28 23:13:19,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:13:19,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:19,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:13:19,865 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:13:19,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 23:13:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:20,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 23:13:20,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:13:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-10-28 23:13:20,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21789760] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:20,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:13:20,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-10-28 23:13:20,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504781462] [2021-10-28 23:13:20,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 23:13:20,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:13:20,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 23:13:20,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:13:20,262 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) [2021-10-28 23:13:20,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:13:20,358 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-10-28 23:13:20,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:13:20,358 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) Word has length 52 [2021-10-28 23:13:20,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:13:20,360 INFO L225 Difference]: With dead ends: 40 [2021-10-28 23:13:20,360 INFO L226 Difference]: Without dead ends: 36 [2021-10-28 23:13:20,360 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-10-28 23:13:20,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-28 23:13:20,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-28 23:13:20,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2021-10-28 23:13:20,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-10-28 23:13:20,366 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2021-10-28 23:13:20,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:13:20,366 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-10-28 23:13:20,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) [2021-10-28 23:13:20,367 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-10-28 23:13:20,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-28 23:13:20,368 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:13:20,368 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:13:20,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 23:13:20,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:20,588 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:13:20,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:13:20,589 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2021-10-28 23:13:20,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:13:20,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403710163] [2021-10-28 23:13:20,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:13:20,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:13:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:20,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:20,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:20,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:20,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:20,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:20,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:20,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:20,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:20,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:20,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:20,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:20,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:20,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:20,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:20,859 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-28 23:13:20,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:13:20,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403710163] [2021-10-28 23:13:20,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403710163] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:20,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533273555] [2021-10-28 23:13:20,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:13:20,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:20,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:13:20,862 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:13:20,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 23:13:21,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:13:21,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:13:21,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 23:13:21,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:13:21,260 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-28 23:13:21,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533273555] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:21,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:13:21,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-10-28 23:13:21,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780591946] [2021-10-28 23:13:21,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 23:13:21,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:13:21,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 23:13:21,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:13:21,266 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 10 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) [2021-10-28 23:13:21,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:13:21,388 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-10-28 23:13:21,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 23:13:21,389 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 10 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) Word has length 58 [2021-10-28 23:13:21,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:13:21,392 INFO L225 Difference]: With dead ends: 43 [2021-10-28 23:13:21,392 INFO L226 Difference]: Without dead ends: 39 [2021-10-28 23:13:21,394 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-10-28 23:13:21,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-28 23:13:21,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-10-28 23:13:21,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2021-10-28 23:13:21,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-10-28 23:13:21,417 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2021-10-28 23:13:21,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:13:21,418 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-10-28 23:13:21,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 10 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) [2021-10-28 23:13:21,418 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-10-28 23:13:21,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-10-28 23:13:21,422 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:13:21,422 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:13:21,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 23:13:21,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:21,640 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:13:21,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:13:21,640 INFO L85 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2021-10-28 23:13:21,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:13:21,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267997101] [2021-10-28 23:13:21,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:13:21,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:13:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:21,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:21,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:21,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:21,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:21,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:21,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:21,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:21,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:21,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:21,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:21,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:21,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:21,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:21,915 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-10-28 23:13:21,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:13:21,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267997101] [2021-10-28 23:13:21,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267997101] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:21,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22806662] [2021-10-28 23:13:21,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:13:21,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:21,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:13:21,919 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:13:21,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 23:13:22,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-28 23:13:22,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:13:22,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-28 23:13:22,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:13:22,597 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-10-28 23:13:22,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22806662] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:22,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:13:22,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2021-10-28 23:13:22,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056943590] [2021-10-28 23:13:22,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 23:13:22,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:13:22,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 23:13:22,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 23:13:22,600 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 35 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (4), 1 states have call predecessors, (4), 20 states have return successors, (20), 20 states have call predecessors, (20), 3 states have call successors, (20) [2021-10-28 23:13:22,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:13:22,985 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-10-28 23:13:22,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 23:13:22,986 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (4), 1 states have call predecessors, (4), 20 states have return successors, (20), 20 states have call predecessors, (20), 3 states have call successors, (20) Word has length 64 [2021-10-28 23:13:22,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:13:22,987 INFO L225 Difference]: With dead ends: 46 [2021-10-28 23:13:22,987 INFO L226 Difference]: Without dead ends: 42 [2021-10-28 23:13:22,989 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2021-10-28 23:13:22,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-28 23:13:22,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-28 23:13:22,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2021-10-28 23:13:22,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-10-28 23:13:22,994 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2021-10-28 23:13:22,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:13:22,994 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-10-28 23:13:22,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (4), 1 states have call predecessors, (4), 20 states have return successors, (20), 20 states have call predecessors, (20), 3 states have call successors, (20) [2021-10-28 23:13:22,995 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-10-28 23:13:22,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-28 23:13:22,996 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:13:22,996 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:13:23,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 23:13:23,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 23:13:23,219 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:13:23,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:13:23,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2021-10-28 23:13:23,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:13:23,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768639906] [2021-10-28 23:13:23,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:13:23,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:13:23,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:23,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:23,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:23,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:23,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:23,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:23,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:23,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:23,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:23,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:23,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:23,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:23,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:23,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:23,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:23,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-10-28 23:13:23,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:13:23,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768639906] [2021-10-28 23:13:23,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768639906] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:23,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659231053] [2021-10-28 23:13:23,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:13:23,517 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:23,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:13:23,518 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:13:23,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 23:13:23,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:13:23,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:13:23,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 23:13:23,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:13:23,987 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-10-28 23:13:23,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659231053] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:23,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:13:23,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-10-28 23:13:23,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830717949] [2021-10-28 23:13:23,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 23:13:23,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:13:23,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 23:13:23,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-10-28 23:13:23,989 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 17 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 12 states have return successors, (21), 11 states have call predecessors, (21), 3 states have call successors, (21) [2021-10-28 23:13:24,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:13:24,120 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-10-28 23:13:24,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 23:13:24,122 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 17 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 12 states have return successors, (21), 11 states have call predecessors, (21), 3 states have call successors, (21) Word has length 70 [2021-10-28 23:13:24,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:13:24,123 INFO L225 Difference]: With dead ends: 49 [2021-10-28 23:13:24,123 INFO L226 Difference]: Without dead ends: 45 [2021-10-28 23:13:24,124 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2021-10-28 23:13:24,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-28 23:13:24,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-10-28 23:13:24,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2021-10-28 23:13:24,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-10-28 23:13:24,129 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2021-10-28 23:13:24,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:13:24,129 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-10-28 23:13:24,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 17 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 12 states have return successors, (21), 11 states have call predecessors, (21), 3 states have call successors, (21) [2021-10-28 23:13:24,130 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-10-28 23:13:24,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-28 23:13:24,131 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:13:24,131 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:13:24,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 23:13:24,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:24,353 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:13:24,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:13:24,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2021-10-28 23:13:24,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:13:24,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49779012] [2021-10-28 23:13:24,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:13:24,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:13:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:24,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:24,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:24,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:24,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:24,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:24,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:24,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:24,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:24,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:24,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:24,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:24,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:24,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:24,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:24,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:24,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:24,700 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-10-28 23:13:24,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:13:24,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49779012] [2021-10-28 23:13:24,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49779012] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:24,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953249242] [2021-10-28 23:13:24,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:13:24,702 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:24,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:13:24,703 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:13:24,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 23:13:24,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-10-28 23:13:24,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:13:24,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-28 23:13:24,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:13:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-10-28 23:13:25,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953249242] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:25,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:13:25,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-10-28 23:13:25,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071981687] [2021-10-28 23:13:25,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 23:13:25,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:13:25,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 23:13:25,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:13:25,198 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 13 states have return successors, (23), 12 states have call predecessors, (23), 3 states have call successors, (23) [2021-10-28 23:13:25,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:13:25,347 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-10-28 23:13:25,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 23:13:25,347 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 13 states have return successors, (23), 12 states have call predecessors, (23), 3 states have call successors, (23) Word has length 76 [2021-10-28 23:13:25,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:13:25,348 INFO L225 Difference]: With dead ends: 52 [2021-10-28 23:13:25,349 INFO L226 Difference]: Without dead ends: 48 [2021-10-28 23:13:25,350 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2021-10-28 23:13:25,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-28 23:13:25,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-10-28 23:13:25,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2021-10-28 23:13:25,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-10-28 23:13:25,355 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2021-10-28 23:13:25,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:13:25,355 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-10-28 23:13:25,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 13 states have return successors, (23), 12 states have call predecessors, (23), 3 states have call successors, (23) [2021-10-28 23:13:25,356 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-10-28 23:13:25,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-28 23:13:25,357 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:13:25,357 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:13:25,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 23:13:25,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:25,583 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:13:25,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:13:25,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2021-10-28 23:13:25,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:13:25,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158983630] [2021-10-28 23:13:25,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:13:25,584 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:13:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:25,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:25,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:25,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:25,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:25,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:25,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:25,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:25,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:25,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:25,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:25,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:25,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:25,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:25,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:25,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:25,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:25,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:25,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:25,999 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-10-28 23:13:26,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:13:26,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158983630] [2021-10-28 23:13:26,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158983630] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:26,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805055806] [2021-10-28 23:13:26,000 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:13:26,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:26,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:13:26,003 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:13:26,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 23:13:26,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-10-28 23:13:26,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:13:26,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 23:13:26,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:13:26,528 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-10-28 23:13:26,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805055806] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:26,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:13:26,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-10-28 23:13:26,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516758012] [2021-10-28 23:13:26,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 23:13:26,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:13:26,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 23:13:26,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:13:26,534 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 14 states have return successors, (25), 13 states have call predecessors, (25), 3 states have call successors, (25) [2021-10-28 23:13:26,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:13:26,673 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-10-28 23:13:26,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 23:13:26,674 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 14 states have return successors, (25), 13 states have call predecessors, (25), 3 states have call successors, (25) Word has length 82 [2021-10-28 23:13:26,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:13:26,676 INFO L225 Difference]: With dead ends: 55 [2021-10-28 23:13:26,676 INFO L226 Difference]: Without dead ends: 51 [2021-10-28 23:13:26,678 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=349, Invalid=643, Unknown=0, NotChecked=0, Total=992 [2021-10-28 23:13:26,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-28 23:13:26,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-10-28 23:13:26,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2021-10-28 23:13:26,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-10-28 23:13:26,693 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2021-10-28 23:13:26,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:13:26,694 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-10-28 23:13:26,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 14 states have return successors, (25), 13 states have call predecessors, (25), 3 states have call successors, (25) [2021-10-28 23:13:26,694 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-10-28 23:13:26,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-10-28 23:13:26,695 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:13:26,695 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:13:26,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 23:13:26,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-28 23:13:26,903 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:13:26,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:13:26,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2021-10-28 23:13:26,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:13:26,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90492067] [2021-10-28 23:13:26,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:13:26,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:13:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:26,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:26,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:26,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:26,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:27,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:27,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:27,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:27,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:27,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:27,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:27,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:27,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:27,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:27,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:27,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:27,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:27,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:27,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:27,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-10-28 23:13:27,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:13:27,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90492067] [2021-10-28 23:13:27,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90492067] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:27,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306100933] [2021-10-28 23:13:27,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:13:27,350 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:27,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:13:27,355 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:13:27,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 23:13:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:27,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 23:13:27,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:13:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-10-28 23:13:28,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306100933] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:28,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:13:28,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-10-28 23:13:28,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046861447] [2021-10-28 23:13:28,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 23:13:28,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:13:28,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 23:13:28,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-10-28 23:13:28,036 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 15 states have return successors, (27), 14 states have call predecessors, (27), 3 states have call successors, (27) [2021-10-28 23:13:28,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:13:28,203 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-10-28 23:13:28,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 23:13:28,203 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 15 states have return successors, (27), 14 states have call predecessors, (27), 3 states have call successors, (27) Word has length 88 [2021-10-28 23:13:28,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:13:28,204 INFO L225 Difference]: With dead ends: 58 [2021-10-28 23:13:28,204 INFO L226 Difference]: Without dead ends: 54 [2021-10-28 23:13:28,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 23:13:28,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-28 23:13:28,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-10-28 23:13:28,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2021-10-28 23:13:28,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-10-28 23:13:28,213 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2021-10-28 23:13:28,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:13:28,214 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-10-28 23:13:28,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 15 states have return successors, (27), 14 states have call predecessors, (27), 3 states have call successors, (27) [2021-10-28 23:13:28,215 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-10-28 23:13:28,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-28 23:13:28,217 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:13:28,217 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:13:28,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 23:13:28,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 23:13:28,431 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:13:28,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:13:28,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2021-10-28 23:13:28,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:13:28,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542372946] [2021-10-28 23:13:28,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:13:28,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:13:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:28,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:28,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:28,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:28,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:28,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:28,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:28,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:28,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:28,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:28,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:28,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:28,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:28,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:28,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:28,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:28,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:28,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:28,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:28,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:28,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-10-28 23:13:28,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:13:28,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542372946] [2021-10-28 23:13:28,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542372946] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:28,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008414299] [2021-10-28 23:13:28,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:13:28,888 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:28,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:13:28,889 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:13:28,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 23:13:29,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:13:29,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:13:29,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-28 23:13:29,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:13:29,579 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-10-28 23:13:29,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008414299] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:29,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:13:29,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-10-28 23:13:29,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419309087] [2021-10-28 23:13:29,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 23:13:29,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:13:29,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 23:13:29,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2021-10-28 23:13:29,581 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 16 states have return successors, (29), 15 states have call predecessors, (29), 3 states have call successors, (29) [2021-10-28 23:13:29,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:13:29,775 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-10-28 23:13:29,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 23:13:29,776 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 16 states have return successors, (29), 15 states have call predecessors, (29), 3 states have call successors, (29) Word has length 94 [2021-10-28 23:13:29,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:13:29,777 INFO L225 Difference]: With dead ends: 61 [2021-10-28 23:13:29,777 INFO L226 Difference]: Without dead ends: 57 [2021-10-28 23:13:29,778 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 23:13:29,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-28 23:13:29,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-10-28 23:13:29,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2021-10-28 23:13:29,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-10-28 23:13:29,783 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2021-10-28 23:13:29,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:13:29,783 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-10-28 23:13:29,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 16 states have return successors, (29), 15 states have call predecessors, (29), 3 states have call successors, (29) [2021-10-28 23:13:29,783 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-10-28 23:13:29,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-28 23:13:29,785 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:13:29,785 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:13:29,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 23:13:30,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 23:13:30,007 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:13:30,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:13:30,007 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2021-10-28 23:13:30,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:13:30,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822088182] [2021-10-28 23:13:30,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:13:30,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:13:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:30,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:30,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:30,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:30,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:30,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:30,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:30,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:30,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:30,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:30,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:30,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:30,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:30,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:30,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:30,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:30,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:30,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:30,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:30,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:30,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:30,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:30,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:30,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:30,504 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-10-28 23:13:30,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:13:30,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822088182] [2021-10-28 23:13:30,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822088182] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:30,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190056583] [2021-10-28 23:13:30,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:13:30,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:30,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:13:30,507 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:13:30,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 23:13:30,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-10-28 23:13:30,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:13:30,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-28 23:13:30,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:13:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-10-28 23:13:31,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190056583] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:31,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:13:31,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-10-28 23:13:31,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943879317] [2021-10-28 23:13:31,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 23:13:31,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:13:31,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 23:13:31,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-10-28 23:13:31,315 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 22 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 17 states have return successors, (31), 16 states have call predecessors, (31), 3 states have call successors, (31) [2021-10-28 23:13:31,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:13:31,499 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-10-28 23:13:31,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 23:13:31,500 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 22 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 17 states have return successors, (31), 16 states have call predecessors, (31), 3 states have call successors, (31) Word has length 100 [2021-10-28 23:13:31,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:13:31,501 INFO L225 Difference]: With dead ends: 64 [2021-10-28 23:13:31,501 INFO L226 Difference]: Without dead ends: 60 [2021-10-28 23:13:31,502 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=499, Invalid=907, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 23:13:31,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-28 23:13:31,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-10-28 23:13:31,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (18), 17 states have call predecessors, (18), 2 states have call successors, (18) [2021-10-28 23:13:31,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-10-28 23:13:31,507 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2021-10-28 23:13:31,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:13:31,508 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-10-28 23:13:31,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 22 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 17 states have return successors, (31), 16 states have call predecessors, (31), 3 states have call successors, (31) [2021-10-28 23:13:31,508 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-10-28 23:13:31,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-10-28 23:13:31,510 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:13:31,510 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:13:31,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 23:13:31,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 23:13:31,735 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:13:31,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:13:31,735 INFO L85 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2021-10-28 23:13:31,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:13:31,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698257030] [2021-10-28 23:13:31,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:13:31,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:13:31,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:31,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:31,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:31,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:31,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:31,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:31,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:31,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:31,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:32,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:32,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:32,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:32,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:32,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:32,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:32,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:32,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:32,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:32,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:32,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:32,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:32,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:32,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:32,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:32,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:32,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:32,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:32,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:32,275 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-10-28 23:13:32,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:13:32,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698257030] [2021-10-28 23:13:32,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698257030] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:32,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491309629] [2021-10-28 23:13:32,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:13:32,277 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:32,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:13:32,279 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:13:32,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 23:13:32,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:13:32,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:13:32,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-28 23:13:32,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:13:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-10-28 23:13:32,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491309629] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:32,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:13:32,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-10-28 23:13:32,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921664913] [2021-10-28 23:13:32,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 23:13:32,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:13:32,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 23:13:32,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:13:32,931 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 23 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 18 states have return successors, (33), 17 states have call predecessors, (33), 3 states have call successors, (33) [2021-10-28 23:13:33,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:13:33,127 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-10-28 23:13:33,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 23:13:33,128 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 23 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 18 states have return successors, (33), 17 states have call predecessors, (33), 3 states have call successors, (33) Word has length 106 [2021-10-28 23:13:33,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:13:33,128 INFO L225 Difference]: With dead ends: 67 [2021-10-28 23:13:33,128 INFO L226 Difference]: Without dead ends: 63 [2021-10-28 23:13:33,129 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=555, Invalid=1005, Unknown=0, NotChecked=0, Total=1560 [2021-10-28 23:13:33,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-28 23:13:33,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-10-28 23:13:33,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2021-10-28 23:13:33,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-10-28 23:13:33,153 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2021-10-28 23:13:33,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:13:33,153 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-10-28 23:13:33,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 23 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 18 states have return successors, (33), 17 states have call predecessors, (33), 3 states have call successors, (33) [2021-10-28 23:13:33,154 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-10-28 23:13:33,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-10-28 23:13:33,155 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:13:33,156 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:13:33,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 23:13:33,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 23:13:33,379 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:13:33,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:13:33,379 INFO L85 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 17 times [2021-10-28 23:13:33,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:13:33,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322433920] [2021-10-28 23:13:33,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:13:33,380 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:13:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:33,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:33,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:33,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:33,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:33,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:33,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:33,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:33,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:33,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:33,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:33,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:33,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:33,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:33,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:33,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:33,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:33,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:33,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:33,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:33,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:33,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:33,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:33,920 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-10-28 23:13:33,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:13:33,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322433920] [2021-10-28 23:13:33,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322433920] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:33,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757511236] [2021-10-28 23:13:33,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:13:33,922 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:33,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:13:33,923 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:13:33,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 23:13:34,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-10-28 23:13:34,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:13:34,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-28 23:13:34,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:13:34,743 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-10-28 23:13:34,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757511236] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:34,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:13:34,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-10-28 23:13:34,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922136894] [2021-10-28 23:13:34,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-28 23:13:34,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:13:34,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-28 23:13:34,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2021-10-28 23:13:34,746 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 19 states have return successors, (35), 18 states have call predecessors, (35), 3 states have call successors, (35) [2021-10-28 23:13:34,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:13:34,967 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-10-28 23:13:34,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-28 23:13:34,971 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 19 states have return successors, (35), 18 states have call predecessors, (35), 3 states have call successors, (35) Word has length 112 [2021-10-28 23:13:34,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:13:34,972 INFO L225 Difference]: With dead ends: 70 [2021-10-28 23:13:34,972 INFO L226 Difference]: Without dead ends: 66 [2021-10-28 23:13:34,973 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=614, Invalid=1108, Unknown=0, NotChecked=0, Total=1722 [2021-10-28 23:13:34,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-28 23:13:34,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-10-28 23:13:34,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 45 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (20), 19 states have call predecessors, (20), 2 states have call successors, (20) [2021-10-28 23:13:34,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-10-28 23:13:34,977 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2021-10-28 23:13:34,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:13:34,977 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-10-28 23:13:34,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 19 states have return successors, (35), 18 states have call predecessors, (35), 3 states have call successors, (35) [2021-10-28 23:13:34,977 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-10-28 23:13:34,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-28 23:13:34,978 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:13:34,978 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:13:35,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 23:13:35,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:35,179 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:13:35,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:13:35,179 INFO L85 PathProgramCache]: Analyzing trace with hash 55840780, now seen corresponding path program 18 times [2021-10-28 23:13:35,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:13:35,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902034608] [2021-10-28 23:13:35,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:13:35,180 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:13:35,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:35,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:35,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:35,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:35,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:35,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:35,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:35,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:35,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:35,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:35,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:35,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:35,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:35,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:35,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:35,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:35,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:35,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:35,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:35,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:35,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:35,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:35,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:35,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:35,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:35,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:35,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:35,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-10-28 23:13:35,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:13:35,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902034608] [2021-10-28 23:13:35,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902034608] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:35,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323948522] [2021-10-28 23:13:35,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:13:35,767 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:35,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:13:35,771 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:13:35,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 23:13:36,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-10-28 23:13:36,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:13:36,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 23:13:36,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:13:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-10-28 23:13:37,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323948522] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:37,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:13:37,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2021-10-28 23:13:37,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928238446] [2021-10-28 23:13:37,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-10-28 23:13:37,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:13:37,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-10-28 23:13:37,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=3166, Unknown=0, NotChecked=0, Total=3782 [2021-10-28 23:13:37,510 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 62 states, 61 states have (on average 1.4426229508196722) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (4), 1 states have call predecessors, (4), 38 states have return successors, (38), 38 states have call predecessors, (38), 3 states have call successors, (38) [2021-10-28 23:13:38,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:13:38,434 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2021-10-28 23:13:38,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-28 23:13:38,435 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.4426229508196722) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (4), 1 states have call predecessors, (4), 38 states have return successors, (38), 38 states have call predecessors, (38), 3 states have call successors, (38) Word has length 118 [2021-10-28 23:13:38,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:13:38,437 INFO L225 Difference]: With dead ends: 73 [2021-10-28 23:13:38,437 INFO L226 Difference]: Without dead ends: 69 [2021-10-28 23:13:38,441 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1773, Invalid=7929, Unknown=0, NotChecked=0, Total=9702 [2021-10-28 23:13:38,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-28 23:13:38,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-28 23:13:38,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 47 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (21), 20 states have call predecessors, (21), 2 states have call successors, (21) [2021-10-28 23:13:38,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-10-28 23:13:38,447 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2021-10-28 23:13:38,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:13:38,447 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-10-28 23:13:38,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.4426229508196722) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (4), 1 states have call predecessors, (4), 38 states have return successors, (38), 38 states have call predecessors, (38), 3 states have call successors, (38) [2021-10-28 23:13:38,448 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-10-28 23:13:38,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-10-28 23:13:38,449 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:13:38,450 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:13:38,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 23:13:38,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:38,674 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:13:38,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:13:38,675 INFO L85 PathProgramCache]: Analyzing trace with hash -806952938, now seen corresponding path program 19 times [2021-10-28 23:13:38,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:13:38,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20754818] [2021-10-28 23:13:38,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:13:38,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:13:38,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:38,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:38,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:38,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:38,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:38,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:38,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:38,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:38,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:38,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:39,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:39,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:39,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:39,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:39,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:39,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:39,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:39,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:39,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:39,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:39,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:39,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:39,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:39,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:39,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:39,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:39,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:39,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:39,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:39,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:39,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-10-28 23:13:39,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:13:39,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20754818] [2021-10-28 23:13:39,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20754818] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:39,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383983592] [2021-10-28 23:13:39,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:13:39,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:39,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:13:39,439 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:13:39,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 23:13:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:40,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-28 23:13:40,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:13:40,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-10-28 23:13:40,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383983592] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:40,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:13:40,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-10-28 23:13:40,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646869361] [2021-10-28 23:13:40,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-28 23:13:40,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:13:40,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-28 23:13:40,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2021-10-28 23:13:40,483 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 21 states have return successors, (39), 20 states have call predecessors, (39), 3 states have call successors, (39) [2021-10-28 23:13:40,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:13:40,732 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-10-28 23:13:40,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 23:13:40,733 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 21 states have return successors, (39), 20 states have call predecessors, (39), 3 states have call successors, (39) Word has length 124 [2021-10-28 23:13:40,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:13:40,734 INFO L225 Difference]: With dead ends: 76 [2021-10-28 23:13:40,734 INFO L226 Difference]: Without dead ends: 72 [2021-10-28 23:13:40,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=741, Invalid=1329, Unknown=0, NotChecked=0, Total=2070 [2021-10-28 23:13:40,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-28 23:13:40,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-10-28 23:13:40,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 49 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (22), 21 states have call predecessors, (22), 2 states have call successors, (22) [2021-10-28 23:13:40,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-10-28 23:13:40,740 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2021-10-28 23:13:40,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:13:40,741 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-10-28 23:13:40,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 21 states have return successors, (39), 20 states have call predecessors, (39), 3 states have call successors, (39) [2021-10-28 23:13:40,741 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-10-28 23:13:40,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-10-28 23:13:40,743 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:13:40,743 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:13:40,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 23:13:40,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:40,971 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:13:40,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:13:40,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1807457588, now seen corresponding path program 20 times [2021-10-28 23:13:40,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:13:40,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231446616] [2021-10-28 23:13:40,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:13:40,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:13:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:41,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:41,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:41,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:41,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:41,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:41,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:41,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:41,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:41,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:41,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:41,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:41,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:41,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:41,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:41,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:41,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:41,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:41,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:41,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:41,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:41,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:41,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:41,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:41,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:41,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:41,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:41,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:41,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-10-28 23:13:41,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:13:41,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231446616] [2021-10-28 23:13:41,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231446616] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:41,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722010405] [2021-10-28 23:13:41,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:13:41,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:41,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:13:41,695 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:13:41,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 23:13:42,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:13:42,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:13:42,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-28 23:13:42,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:13:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-10-28 23:13:42,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722010405] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:42,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:13:42,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-10-28 23:13:42,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964654584] [2021-10-28 23:13:42,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 23:13:42,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:13:42,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 23:13:42,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=419, Unknown=0, NotChecked=0, Total=702 [2021-10-28 23:13:42,741 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 27 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 22 states have return successors, (41), 21 states have call predecessors, (41), 3 states have call successors, (41) [2021-10-28 23:13:42,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:13:42,993 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-10-28 23:13:42,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-28 23:13:42,993 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 27 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 22 states have return successors, (41), 21 states have call predecessors, (41), 3 states have call successors, (41) Word has length 130 [2021-10-28 23:13:42,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:13:42,994 INFO L225 Difference]: With dead ends: 79 [2021-10-28 23:13:42,995 INFO L226 Difference]: Without dead ends: 75 [2021-10-28 23:13:42,996 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=809, Invalid=1447, Unknown=0, NotChecked=0, Total=2256 [2021-10-28 23:13:42,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-28 23:13:43,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-10-28 23:13:43,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.02) internal successors, (51), 51 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (23), 22 states have call predecessors, (23), 2 states have call successors, (23) [2021-10-28 23:13:43,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-10-28 23:13:43,001 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 130 [2021-10-28 23:13:43,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:13:43,001 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-10-28 23:13:43,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 27 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 22 states have return successors, (41), 21 states have call predecessors, (41), 3 states have call successors, (41) [2021-10-28 23:13:43,002 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-10-28 23:13:43,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-10-28 23:13:43,003 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:13:43,003 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:13:43,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 23:13:43,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:43,227 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:13:43,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:13:43,227 INFO L85 PathProgramCache]: Analyzing trace with hash 874439510, now seen corresponding path program 21 times [2021-10-28 23:13:43,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:13:43,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789470707] [2021-10-28 23:13:43,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:13:43,227 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:13:43,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:43,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:43,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:43,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:43,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:43,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:43,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:43,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:43,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:43,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:43,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:43,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:43,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:43,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:43,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:43,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:43,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:43,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:43,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:43,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:43,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:43,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:43,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:43,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:43,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:43,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:43,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:43,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:43,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:43,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:43,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-10-28 23:13:43,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:13:43,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789470707] [2021-10-28 23:13:43,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789470707] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:43,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910195367] [2021-10-28 23:13:43,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:13:43,997 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:43,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:13:43,999 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:13:44,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 23:13:44,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-10-28 23:13:44,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:13:44,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-28 23:13:44,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:13:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-10-28 23:13:45,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910195367] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:45,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:13:45,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-10-28 23:13:45,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779642410] [2021-10-28 23:13:45,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-28 23:13:45,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:13:45,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 23:13:45,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=449, Unknown=0, NotChecked=0, Total=756 [2021-10-28 23:13:45,097 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 23 states have return successors, (43), 22 states have call predecessors, (43), 3 states have call successors, (43) [2021-10-28 23:13:45,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:13:45,382 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2021-10-28 23:13:45,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 23:13:45,385 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 23 states have return successors, (43), 22 states have call predecessors, (43), 3 states have call successors, (43) Word has length 136 [2021-10-28 23:13:45,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:13:45,386 INFO L225 Difference]: With dead ends: 82 [2021-10-28 23:13:45,386 INFO L226 Difference]: Without dead ends: 78 [2021-10-28 23:13:45,388 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=880, Invalid=1570, Unknown=0, NotChecked=0, Total=2450 [2021-10-28 23:13:45,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-28 23:13:45,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-10-28 23:13:45,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 53 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 23 states have return successors, (24), 23 states have call predecessors, (24), 2 states have call successors, (24) [2021-10-28 23:13:45,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-10-28 23:13:45,393 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 136 [2021-10-28 23:13:45,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:13:45,393 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-10-28 23:13:45,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 23 states have return successors, (43), 22 states have call predecessors, (43), 3 states have call successors, (43) [2021-10-28 23:13:45,394 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-10-28 23:13:45,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-10-28 23:13:45,395 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:13:45,395 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:13:45,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 23:13:45,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-28 23:13:45,623 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:13:45,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:13:45,623 INFO L85 PathProgramCache]: Analyzing trace with hash 849241484, now seen corresponding path program 22 times [2021-10-28 23:13:45,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:13:45,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169984857] [2021-10-28 23:13:45,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:13:45,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:13:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:45,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:45,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:45,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:45,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:45,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:45,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:45,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:46,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:46,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:46,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:46,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:46,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:46,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:46,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:46,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:46,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:46,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:46,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:46,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:46,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:46,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:46,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:46,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:46,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:46,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:46,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:46,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-10-28 23:13:46,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:13:46,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169984857] [2021-10-28 23:13:46,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169984857] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:46,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010965455] [2021-10-28 23:13:46,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:13:46,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:46,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:13:46,515 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:13:46,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 23:13:47,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:13:47,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:13:47,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-28 23:13:47,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:13:47,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-10-28 23:13:47,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010965455] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:47,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:13:47,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-10-28 23:13:47,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072800631] [2021-10-28 23:13:47,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-28 23:13:47,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:13:47,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-28 23:13:47,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=480, Unknown=0, NotChecked=0, Total=812 [2021-10-28 23:13:47,644 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 29 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 24 states have return successors, (45), 23 states have call predecessors, (45), 3 states have call successors, (45) [2021-10-28 23:13:47,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:13:47,909 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2021-10-28 23:13:47,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-28 23:13:47,911 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 29 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 24 states have return successors, (45), 23 states have call predecessors, (45), 3 states have call successors, (45) Word has length 142 [2021-10-28 23:13:47,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:13:47,912 INFO L225 Difference]: With dead ends: 85 [2021-10-28 23:13:47,912 INFO L226 Difference]: Without dead ends: 81 [2021-10-28 23:13:47,914 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=954, Invalid=1698, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 23:13:47,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-28 23:13:47,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-10-28 23:13:47,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 55 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (25), 24 states have call predecessors, (25), 2 states have call successors, (25) [2021-10-28 23:13:47,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-10-28 23:13:47,920 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 142 [2021-10-28 23:13:47,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:13:47,921 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-10-28 23:13:47,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 29 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 24 states have return successors, (45), 23 states have call predecessors, (45), 3 states have call successors, (45) [2021-10-28 23:13:47,921 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-10-28 23:13:47,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-10-28 23:13:47,922 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:13:47,923 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:13:47,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-10-28 23:13:48,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-28 23:13:48,140 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:13:48,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:13:48,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1665808022, now seen corresponding path program 23 times [2021-10-28 23:13:48,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:13:48,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006768995] [2021-10-28 23:13:48,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:13:48,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:13:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:48,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:48,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:48,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:48,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:48,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:48,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:48,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:48,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:48,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:48,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:48,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:48,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:48,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:48,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:48,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:48,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:48,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:48,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:48,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:48,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:48,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:48,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:48,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:48,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:48,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:48,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:48,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:48,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:48,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:48,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:48,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:49,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:49,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:49,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-10-28 23:13:49,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:13:49,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006768995] [2021-10-28 23:13:49,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006768995] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:49,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221764780] [2021-10-28 23:13:49,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:13:49,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:49,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:13:49,075 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:13:49,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 23:13:49,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-10-28 23:13:49,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:13:49,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-28 23:13:49,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:13:51,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-10-28 23:13:51,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221764780] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:51,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:13:51,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 51] total 77 [2021-10-28 23:13:51,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151752646] [2021-10-28 23:13:51,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-10-28 23:13:51,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:13:51,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-10-28 23:13:51,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=956, Invalid=4896, Unknown=0, NotChecked=0, Total=5852 [2021-10-28 23:13:51,316 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 77 states, 76 states have (on average 1.4210526315789473) internal successors, (108), 53 states have internal predecessors, (108), 3 states have call successors, (4), 1 states have call predecessors, (4), 48 states have return successors, (48), 48 states have call predecessors, (48), 3 states have call successors, (48) [2021-10-28 23:13:52,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:13:52,473 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2021-10-28 23:13:52,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-10-28 23:13:52,473 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.4210526315789473) internal successors, (108), 53 states have internal predecessors, (108), 3 states have call successors, (4), 1 states have call predecessors, (4), 48 states have return successors, (48), 48 states have call predecessors, (48), 3 states have call successors, (48) Word has length 148 [2021-10-28 23:13:52,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:13:52,474 INFO L225 Difference]: With dead ends: 88 [2021-10-28 23:13:52,475 INFO L226 Difference]: Without dead ends: 84 [2021-10-28 23:13:52,479 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3310 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2778, Invalid=12474, Unknown=0, NotChecked=0, Total=15252 [2021-10-28 23:13:52,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-28 23:13:52,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-10-28 23:13:52,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 57 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 25 states have return successors, (26), 25 states have call predecessors, (26), 2 states have call successors, (26) [2021-10-28 23:13:52,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-10-28 23:13:52,484 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 148 [2021-10-28 23:13:52,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:13:52,484 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-10-28 23:13:52,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.4210526315789473) internal successors, (108), 53 states have internal predecessors, (108), 3 states have call successors, (4), 1 states have call predecessors, (4), 48 states have return successors, (48), 48 states have call predecessors, (48), 3 states have call successors, (48) [2021-10-28 23:13:52,485 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-10-28 23:13:52,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-10-28 23:13:52,486 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:13:52,487 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:13:52,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-28 23:13:52,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 23:13:52,727 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:13:52,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:13:52,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1715345484, now seen corresponding path program 24 times [2021-10-28 23:13:52,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:13:52,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327234581] [2021-10-28 23:13:52,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:13:52,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:13:52,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:52,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:52,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:52,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:52,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:52,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:52,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:52,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:53,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:53,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:53,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:53,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:53,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:53,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:53,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:53,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:53,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:53,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:53,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:53,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:53,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:53,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:53,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:53,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:53,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:53,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:53,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:53,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:53,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:53,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:53,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:53,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:53,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:53,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:53,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:53,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:13:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:13:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2021-10-28 23:13:53,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:13:53,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327234581] [2021-10-28 23:13:53,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327234581] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:53,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727810456] [2021-10-28 23:13:53,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:13:53,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:53,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:13:53,671 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:13:53,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-28 23:13:54,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-10-28 23:13:54,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:13:54,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-28 23:13:54,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:13:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2021-10-28 23:13:54,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727810456] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:13:54,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:13:54,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-10-28 23:13:54,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49541715] [2021-10-28 23:13:54,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-28 23:13:54,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:13:54,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-28 23:13:54,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=545, Unknown=0, NotChecked=0, Total=930 [2021-10-28 23:13:54,849 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 31 states have internal predecessors, (61), 3 states have call successors, (3), 1 states have call predecessors, (3), 26 states have return successors, (49), 25 states have call predecessors, (49), 3 states have call successors, (49) [2021-10-28 23:13:55,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:13:55,126 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2021-10-28 23:13:55,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 23:13:55,127 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 31 states have internal predecessors, (61), 3 states have call successors, (3), 1 states have call predecessors, (3), 26 states have return successors, (49), 25 states have call predecessors, (49), 3 states have call successors, (49) Word has length 154 [2021-10-28 23:13:55,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:13:55,128 INFO L225 Difference]: With dead ends: 91 [2021-10-28 23:13:55,128 INFO L226 Difference]: Without dead ends: 87 [2021-10-28 23:13:55,129 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1111, Invalid=1969, Unknown=0, NotChecked=0, Total=3080 [2021-10-28 23:13:55,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-28 23:13:55,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-10-28 23:13:55,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 59 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (27), 26 states have call predecessors, (27), 2 states have call successors, (27) [2021-10-28 23:13:55,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2021-10-28 23:13:55,134 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 154 [2021-10-28 23:13:55,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:13:55,134 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2021-10-28 23:13:55,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 31 states have internal predecessors, (61), 3 states have call successors, (3), 1 states have call predecessors, (3), 26 states have return successors, (49), 25 states have call predecessors, (49), 3 states have call successors, (49) [2021-10-28 23:13:55,135 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2021-10-28 23:13:55,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-10-28 23:13:55,136 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:13:55,136 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:13:55,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-28 23:13:55,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:13:55,351 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:13:55,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:13:55,351 INFO L85 PathProgramCache]: Analyzing trace with hash -678635050, now seen corresponding path program 25 times [2021-10-28 23:13:55,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:13:55,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737051778] [2021-10-28 23:13:55,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:13:55,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:13:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:13:55,399 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:13:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:13:55,497 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:13:55,497 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 23:13:55,498 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:13:55,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-28 23:13:55,504 INFO L731 BasicCegarLoop]: Path program histogram: [25, 1] [2021-10-28 23:13:55,508 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:13:55,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:13:55 BoogieIcfgContainer [2021-10-28 23:13:55,627 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:13:55,628 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:13:55,628 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:13:55,629 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:13:55,629 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:13:13" (3/4) ... [2021-10-28 23:13:55,631 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 23:13:55,748 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:13:55,749 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:13:55,750 INFO L168 Benchmark]: Toolchain (without parser) took 42394.28 ms. Allocated memory was 100.7 MB in the beginning and 383.8 MB in the end (delta: 283.1 MB). Free memory was 66.5 MB in the beginning and 129.3 MB in the end (delta: -62.8 MB). Peak memory consumption was 220.6 MB. Max. memory is 16.1 GB. [2021-10-28 23:13:55,751 INFO L168 Benchmark]: CDTParser took 0.57 ms. Allocated memory is still 100.7 MB. Free memory is still 55.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:13:55,752 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.72 ms. Allocated memory is still 100.7 MB. Free memory was 66.4 MB in the beginning and 76.0 MB in the end (delta: -9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:13:55,752 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.42 ms. Allocated memory is still 100.7 MB. Free memory was 76.0 MB in the beginning and 74.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:13:55,752 INFO L168 Benchmark]: Boogie Preprocessor took 20.11 ms. Allocated memory is still 100.7 MB. Free memory was 74.7 MB in the beginning and 73.7 MB in the end (delta: 969.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:13:55,753 INFO L168 Benchmark]: RCFGBuilder took 328.71 ms. Allocated memory is still 100.7 MB. Free memory was 73.7 MB in the beginning and 64.9 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:13:55,754 INFO L168 Benchmark]: TraceAbstraction took 41644.25 ms. Allocated memory was 100.7 MB in the beginning and 383.8 MB in the end (delta: 283.1 MB). Free memory was 64.6 MB in the beginning and 135.6 MB in the end (delta: -71.0 MB). Peak memory consumption was 215.3 MB. Max. memory is 16.1 GB. [2021-10-28 23:13:55,754 INFO L168 Benchmark]: Witness Printer took 120.45 ms. Allocated memory is still 383.8 MB. Free memory was 135.6 MB in the beginning and 129.3 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-28 23:13:55,757 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.57 ms. Allocated memory is still 100.7 MB. Free memory is still 55.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 231.72 ms. Allocated memory is still 100.7 MB. Free memory was 66.4 MB in the beginning and 76.0 MB in the end (delta: -9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.42 ms. Allocated memory is still 100.7 MB. Free memory was 76.0 MB in the beginning and 74.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.11 ms. Allocated memory is still 100.7 MB. Free memory was 74.7 MB in the beginning and 73.7 MB in the end (delta: 969.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 328.71 ms. Allocated memory is still 100.7 MB. Free memory was 73.7 MB in the beginning and 64.9 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 41644.25 ms. Allocated memory was 100.7 MB in the beginning and 383.8 MB in the end (delta: 283.1 MB). Free memory was 64.6 MB in the beginning and 135.6 MB in the end (delta: -71.0 MB). Peak memory consumption was 215.3 MB. Max. memory is 16.1 GB. * Witness Printer took 120.45 ms. Allocated memory is still 383.8 MB. Free memory was 135.6 MB in the beginning and 129.3 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * 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 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int input = 25; [L13] CALL, EXPR id(input) VAL [\old(x)=25] [L7] COND FALSE !(x==0) VAL [\old(x)=25, x=25] [L8] CALL, EXPR id(x-1) VAL [\old(x)=24] [L7] COND FALSE !(x==0) VAL [\old(x)=24, x=24] [L8] CALL, EXPR id(x-1) VAL [\old(x)=23] [L7] COND FALSE !(x==0) VAL [\old(x)=23, x=23] [L8] CALL, EXPR id(x-1) VAL [\old(x)=22] [L7] COND FALSE !(x==0) VAL [\old(x)=22, x=22] [L8] CALL, EXPR id(x-1) VAL [\old(x)=21] [L7] COND FALSE !(x==0) VAL [\old(x)=21, x=21] [L8] CALL, EXPR id(x-1) VAL [\old(x)=20] [L7] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L8] CALL, EXPR id(x-1) VAL [\old(x)=19] [L7] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L8] CALL, EXPR id(x-1) VAL [\old(x)=18] [L7] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L8] CALL, EXPR id(x-1) VAL [\old(x)=17] [L7] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L8] CALL, EXPR id(x-1) VAL [\old(x)=16] [L7] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L8] CALL, EXPR id(x-1) VAL [\old(x)=15] [L7] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L8] CALL, EXPR id(x-1) VAL [\old(x)=14] [L7] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L8] CALL, EXPR id(x-1) VAL [\old(x)=13] [L7] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L8] CALL, EXPR id(x-1) VAL [\old(x)=12] [L7] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L8] CALL, EXPR id(x-1) VAL [\old(x)=11] [L7] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L8] CALL, EXPR id(x-1) VAL [\old(x)=10] [L7] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L8] CALL, EXPR id(x-1) VAL [\old(x)=9] [L7] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L8] CALL, EXPR id(x-1) VAL [\old(x)=8] [L7] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L8] CALL, EXPR id(x-1) VAL [\old(x)=7] [L7] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L8] CALL, EXPR id(x-1) VAL [\old(x)=6] [L7] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L8] CALL, EXPR id(x-1) VAL [\old(x)=5] [L7] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L8] CALL, EXPR id(x-1) VAL [\old(x)=4] [L7] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L8] CALL, EXPR id(x-1) VAL [\old(x)=3] [L7] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L8] CALL, EXPR id(x-1) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id(x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id(x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=21, id(x-1)=20, x=21] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=22, id(x-1)=21, x=22] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=23, id(x-1)=22, x=23] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=24, id(x-1)=23, x=24] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=25, id(x-1)=24, x=25] [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) [L13] int result = id(input); [L14] COND TRUE result == 25 [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 41.4s, OverallIterations: 26, TraceHistogramMax: 26, PathProgramHistogramMax: 25, EmptinessCheckTime: 0.0s, AutomataDifference: 6.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 250 SDtfs, 936 SDslu, 1693 SDs, 0 SdLazy, 1472 SolverSat, 264 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3450 GetRequests, 2521 SyntacticMatches, 0 SemanticMatches, 929 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10621 ImplicationChecksByTransitivity, 10.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=25, InterpolantAutomatonStates: 484, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 25 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 20.6s InterpolantComputationTime, 4250 NumberOfCodeBlocks, 4250 NumberOfCodeBlocksAsserted, 222 NumberOfCheckSat, 4041 ConstructedInterpolants, 0 QuantifiedInterpolants, 10197 SizeOfPredicates, 260 NumberOfNonLiveVariables, 5472 ConjunctsInSsa, 696 ConjunctsInUnsatCore, 49 InterpolantComputations, 1 PerfectInterpolantSequences, 15000/30000 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-28 23:13:55,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61682736-bd0e-47eb-a108-ee1b7a3260dc/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...