./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/hard-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench/hard-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y --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 98c9c42af626702ddf5387966d0ee6d8ed18622c4592b3b15adb184fa40ea1b1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:18:53,852 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:18:53,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:18:53,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:18:53,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:18:53,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:18:53,890 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:18:53,892 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:18:53,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:18:53,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:18:53,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:18:53,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:18:53,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:18:53,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:18:53,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:18:53,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:18:53,905 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:18:53,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:18:53,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:18:53,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:18:53,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:18:53,915 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:18:53,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:18:53,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:18:53,921 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:18:53,922 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:18:53,922 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:18:53,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:18:53,924 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:18:53,925 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:18:53,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:18:53,927 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:18:53,927 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:18:53,928 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:18:53,930 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:18:53,930 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:18:53,931 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:18:53,931 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:18:53,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:18:53,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:18:53,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:18:53,937 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:18:53,962 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:18:53,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:18:53,963 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:18:53,963 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:18:53,964 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:18:53,964 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:18:53,965 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:18:53,965 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:18:53,965 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:18:53,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:18:53,966 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:18:53,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:18:53,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:18:53,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:18:53,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:18:53,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:18:53,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:18:53,967 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:18:53,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:18:53,968 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:18:53,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:18:53,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:18:53,968 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:18:53,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:18:53,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:18:53,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:18:53,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:18:53,969 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:18:53,970 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:18:53,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:18:53,970 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:18:53,970 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:18:53,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:18:53,971 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:18:53,971 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_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98c9c42af626702ddf5387966d0ee6d8ed18622c4592b3b15adb184fa40ea1b1 [2021-11-13 18:18:54,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:18:54,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:18:54,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:18:54,293 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:18:54,300 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:18:54,302 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/nla-digbench/hard-u.c [2021-11-13 18:18:54,389 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/data/17afce227/ffeaff32b096412084c02ff6f5e17bc9/FLAG354abae02 [2021-11-13 18:18:54,818 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:18:54,819 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/sv-benchmarks/c/nla-digbench/hard-u.c [2021-11-13 18:18:54,831 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/data/17afce227/ffeaff32b096412084c02ff6f5e17bc9/FLAG354abae02 [2021-11-13 18:18:55,221 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/data/17afce227/ffeaff32b096412084c02ff6f5e17bc9 [2021-11-13 18:18:55,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:18:55,225 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:18:55,226 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:18:55,227 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:18:55,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:18:55,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:18:55" (1/1) ... [2021-11-13 18:18:55,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a080ae7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:18:55, skipping insertion in model container [2021-11-13 18:18:55,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:18:55" (1/1) ... [2021-11-13 18:18:55,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:18:55,255 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:18:55,415 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_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/sv-benchmarks/c/nla-digbench/hard-u.c[537,550] [2021-11-13 18:18:55,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:18:55,453 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:18:55,472 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_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/sv-benchmarks/c/nla-digbench/hard-u.c[537,550] [2021-11-13 18:18:55,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:18:55,501 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:18:55,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:18:55 WrapperNode [2021-11-13 18:18:55,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:18:55,503 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:18:55,503 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:18:55,503 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:18:55,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:18:55" (1/1) ... [2021-11-13 18:18:55,515 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:18:55" (1/1) ... [2021-11-13 18:18:55,536 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:18:55,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:18:55,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:18:55,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:18:55,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:18:55" (1/1) ... [2021-11-13 18:18:55,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:18:55" (1/1) ... [2021-11-13 18:18:55,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:18:55" (1/1) ... [2021-11-13 18:18:55,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:18:55" (1/1) ... [2021-11-13 18:18:55,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:18:55" (1/1) ... [2021-11-13 18:18:55,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:18:55" (1/1) ... [2021-11-13 18:18:55,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:18:55" (1/1) ... [2021-11-13 18:18:55,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:18:55,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:18:55,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:18:55,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:18:55,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:18:55" (1/1) ... [2021-11-13 18:18:55,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:18:55,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:18:55,604 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:18:55,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:18:55,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:18:55,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:18:55,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:18:55,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:18:55,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 18:18:55,654 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 18:18:55,842 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:18:55,842 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 18:18:55,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:18:55 BoogieIcfgContainer [2021-11-13 18:18:55,844 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:18:55,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:18:55,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:18:55,856 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:18:55,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:18:55" (1/3) ... [2021-11-13 18:18:55,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76347a39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:18:55, skipping insertion in model container [2021-11-13 18:18:55,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:18:55" (2/3) ... [2021-11-13 18:18:55,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76347a39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:18:55, skipping insertion in model container [2021-11-13 18:18:55,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:18:55" (3/3) ... [2021-11-13 18:18:55,860 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u.c [2021-11-13 18:18:55,869 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:18:55,869 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:18:55,919 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:18:55,926 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:18:55,927 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:18:55,944 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-13 18:18:55,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-13 18:18:55,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:55,950 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:55,951 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:55,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:55,956 INFO L85 PathProgramCache]: Analyzing trace with hash -586848446, now seen corresponding path program 1 times [2021-11-13 18:18:55,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:55,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134959264] [2021-11-13 18:18:55,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:55,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:56,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:56,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:56,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134959264] [2021-11-13 18:18:56,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134959264] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:56,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:56,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:18:56,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617325116] [2021-11-13 18:18:56,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:56,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 18:18:56,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:56,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 18:18:56,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:18:56,208 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:18:56,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:56,231 INFO L93 Difference]: Finished difference Result 49 states and 83 transitions. [2021-11-13 18:18:56,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:18:56,233 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-13 18:18:56,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:56,240 INFO L225 Difference]: With dead ends: 49 [2021-11-13 18:18:56,240 INFO L226 Difference]: Without dead ends: 22 [2021-11-13 18:18:56,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:18:56,247 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.85ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:56,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.85ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:18:56,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-13 18:18:56,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-13 18:18:56,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:18:56,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2021-11-13 18:18:56,290 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 9 [2021-11-13 18:18:56,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:56,292 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2021-11-13 18:18:56,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:18:56,292 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2021-11-13 18:18:56,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-13 18:18:56,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:56,294 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:56,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:18:56,294 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:56,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:56,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1188158916, now seen corresponding path program 1 times [2021-11-13 18:18:56,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:56,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164505358] [2021-11-13 18:18:56,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:56,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:56,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:56,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:56,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164505358] [2021-11-13 18:18:56,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164505358] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:56,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:56,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:18:56,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919861285] [2021-11-13 18:18:56,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:56,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:18:56,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:56,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:18:56,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:18:56,387 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. 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), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:18:56,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:56,444 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2021-11-13 18:18:56,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:18:56,445 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), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-13 18:18:56,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:56,446 INFO L225 Difference]: With dead ends: 35 [2021-11-13 18:18:56,446 INFO L226 Difference]: Without dead ends: 33 [2021-11-13 18:18:56,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:18:56,448 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.55ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.43ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:56,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 98 Invalid, 22 Unknown, 0 Unchecked, 3.55ms Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 32.43ms Time] [2021-11-13 18:18:56,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-13 18:18:56,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2021-11-13 18:18:56,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:18:56,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2021-11-13 18:18:56,464 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2021-11-13 18:18:56,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:56,465 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2021-11-13 18:18:56,465 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), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:18:56,469 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2021-11-13 18:18:56,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-13 18:18:56,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:56,470 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:56,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:18:56,471 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:56,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:56,472 INFO L85 PathProgramCache]: Analyzing trace with hash -697944935, now seen corresponding path program 1 times [2021-11-13 18:18:56,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:56,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679345843] [2021-11-13 18:18:56,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:56,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:56,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-13 18:18:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:56,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:56,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:56,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679345843] [2021-11-13 18:18:56,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679345843] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:56,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:56,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:18:56,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233220323] [2021-11-13 18:18:56,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:56,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:18:56,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:56,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:18:56,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:18:56,706 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:18:56,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:56,781 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-11-13 18:18:56,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:18:56,782 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-13 18:18:56,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:56,784 INFO L225 Difference]: With dead ends: 39 [2021-11-13 18:18:56,784 INFO L226 Difference]: Without dead ends: 37 [2021-11-13 18:18:56,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:18:56,786 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.32ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.32ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:56,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 94 Invalid, 32 Unknown, 0 Unchecked, 3.32ms Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 54.32ms Time] [2021-11-13 18:18:56,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-13 18:18:56,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-11-13 18:18:56,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:18:56,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-11-13 18:18:56,807 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2021-11-13 18:18:56,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:56,807 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-11-13 18:18:56,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:18:56,808 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-11-13 18:18:56,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-13 18:18:56,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:56,810 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:56,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:18:56,810 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:56,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:56,812 INFO L85 PathProgramCache]: Analyzing trace with hash 262992548, now seen corresponding path program 1 times [2021-11-13 18:18:56,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:56,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084338995] [2021-11-13 18:18:56,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:56,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:56,875 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:18:56,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002951744] [2021-11-13 18:18:56,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:56,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:18:56,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:18:56,892 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:18:56,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:18:56,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:56,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:18:56,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:18:57,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:18:57,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:18:57,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:57,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084338995] [2021-11-13 18:18:57,145 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:18:57,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002951744] [2021-11-13 18:18:57,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002951744] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:57,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:57,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:18:57,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335527481] [2021-11-13 18:18:57,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:57,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:18:57,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:57,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:18:57,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:18:57,154 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:18:59,242 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-13 18:18:59,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:59,479 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2021-11-13 18:18:59,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:18:59,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-11-13 18:18:59,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:59,481 INFO L225 Difference]: With dead ends: 47 [2021-11-13 18:18:59,481 INFO L226 Difference]: Without dead ends: 44 [2021-11-13 18:18:59,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:18:59,483 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2067.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.37ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2297.12ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:59,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 103 Invalid, 39 Unknown, 0 Unchecked, 2.37ms Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 1 Unknown, 0 Unchecked, 2297.12ms Time] [2021-11-13 18:18:59,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-13 18:18:59,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-13 18:18:59,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-13 18:18:59,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2021-11-13 18:18:59,496 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 19 [2021-11-13 18:18:59,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:59,497 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-11-13 18:18:59,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:18:59,498 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2021-11-13 18:18:59,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-13 18:18:59,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:59,499 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:59,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:18:59,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:18:59,714 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:59,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:59,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1807142342, now seen corresponding path program 1 times [2021-11-13 18:18:59,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:59,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791188616] [2021-11-13 18:18:59,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:59,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:59,736 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:18:59,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221360741] [2021-11-13 18:18:59,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:59,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:18:59,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:18:59,738 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:18:59,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:18:59,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:59,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 18:18:59,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:19:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:19:00,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:19:00,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:19:00,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791188616] [2021-11-13 18:19:00,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:19:00,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221360741] [2021-11-13 18:19:00,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221360741] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:19:00,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:19:00,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:19:00,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442449483] [2021-11-13 18:19:00,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:19:00,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:19:00,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:19:00,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:19:00,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:19:00,070 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:19:00,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:19:00,287 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2021-11-13 18:19:00,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:19:00,294 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-11-13 18:19:00,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:19:00,296 INFO L225 Difference]: With dead ends: 65 [2021-11-13 18:19:00,296 INFO L226 Difference]: Without dead ends: 62 [2021-11-13 18:19:00,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:19:00,298 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 12 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 139.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.77ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 167.77ms IncrementalHoareTripleChecker+Time [2021-11-13 18:19:00,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 120 Invalid, 75 Unknown, 0 Unchecked, 2.77ms Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 167.77ms Time] [2021-11-13 18:19:00,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-13 18:19:00,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-11-13 18:19:00,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-13 18:19:00,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2021-11-13 18:19:00,320 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 26 [2021-11-13 18:19:00,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:19:00,321 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2021-11-13 18:19:00,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:19:00,321 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2021-11-13 18:19:00,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-13 18:19:00,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:19:00,323 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:19:00,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:19:00,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:19:00,553 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:19:00,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:19:00,554 INFO L85 PathProgramCache]: Analyzing trace with hash -979933353, now seen corresponding path program 1 times [2021-11-13 18:19:00,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:19:00,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448390143] [2021-11-13 18:19:00,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:00,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:19:00,569 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:19:00,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1936603489] [2021-11-13 18:19:00,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:00,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:19:00,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:19:00,571 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:19:00,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:19:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:00,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:19:00,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:19:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 18:19:00,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:19:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 18:19:01,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:19:01,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448390143] [2021-11-13 18:19:01,189 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:19:01,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936603489] [2021-11-13 18:19:01,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936603489] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:19:01,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:19:01,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2021-11-13 18:19:01,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197042561] [2021-11-13 18:19:01,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:19:01,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:19:01,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:19:01,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:19:01,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:19:01,192 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:19:03,257 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-13 18:19:05,306 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-13 18:19:07,438 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-13 18:19:09,594 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-13 18:19:09,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:19:09,800 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2021-11-13 18:19:09,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:19:09,801 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-11-13 18:19:09,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:19:09,804 INFO L225 Difference]: With dead ends: 73 [2021-11-13 18:19:09,804 INFO L226 Difference]: Without dead ends: 71 [2021-11-13 18:19:09,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:19:09,806 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8079.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.93ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8580.72ms IncrementalHoareTripleChecker+Time [2021-11-13 18:19:09,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 109 Invalid, 47 Unknown, 0 Unchecked, 1.93ms Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 4 Unknown, 0 Unchecked, 8580.72ms Time] [2021-11-13 18:19:09,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-13 18:19:09,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2021-11-13 18:19:09,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 45 states have internal predecessors, (49), 17 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-13 18:19:09,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2021-11-13 18:19:09,835 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 36 [2021-11-13 18:19:09,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:19:09,835 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2021-11-13 18:19:09,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:19:09,836 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2021-11-13 18:19:09,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-13 18:19:09,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:19:09,837 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:19:09,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-13 18:19:10,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:19:10,042 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:19:10,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:19:10,042 INFO L85 PathProgramCache]: Analyzing trace with hash -2105024486, now seen corresponding path program 1 times [2021-11-13 18:19:10,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:19:10,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139025625] [2021-11-13 18:19:10,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:10,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:19:10,054 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:19:10,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802285631] [2021-11-13 18:19:10,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:10,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:19:10,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:19:10,056 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:19:10,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486df9ed-6741-4dfa-b6f8-a31d2b62ee3d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process