./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.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_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/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_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/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_c6a26d20-86bd-4b1f-93c0-f8211105feb0/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 5d72e5e7abaa750c1c0009f2e3addca35915e1b949637f5a49ed633aadc3fe53 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:34:54,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:34:54,757 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:34:54,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:34:54,825 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:34:54,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:34:54,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:34:54,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:34:54,843 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:34:54,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:34:54,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:34:54,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:34:54,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:34:54,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:34:54,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:34:54,868 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:34:54,870 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:34:54,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:34:54,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:34:54,886 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:34:54,888 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:34:54,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:34:54,895 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:34:54,896 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:34:54,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:34:54,908 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:34:54,909 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:34:54,911 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:34:54,912 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:34:54,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:34:54,915 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:34:54,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:34:54,919 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:34:54,921 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:34:54,923 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:34:54,923 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:34:54,924 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:34:54,925 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:34:54,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:34:54,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:34:54,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:34:54,929 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:34:54,980 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:34:54,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:34:54,981 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:34:54,982 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:34:54,983 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:34:54,984 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:34:54,985 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:34:54,985 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:34:54,986 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:34:54,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:34:54,988 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:34:54,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:34:54,989 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:34:54,989 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:34:54,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:34:54,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:34:54,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:34:54,991 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:34:54,991 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:34:54,991 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:34:54,992 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:34:54,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:34:54,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:34:54,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:34:54,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:34:54,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:34:54,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:34:54,995 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:34:54,995 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:34:54,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:34:54,998 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:34:54,998 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:34:54,999 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:34:54,999 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:34:54,999 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_c6a26d20-86bd-4b1f-93c0-f8211105feb0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5d72e5e7abaa750c1c0009f2e3addca35915e1b949637f5a49ed633aadc3fe53 [2021-11-13 18:34:55,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:34:55,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:34:55,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:34:55,353 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:34:55,354 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:34:55,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c [2021-11-13 18:34:55,430 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/data/f490c8e68/7ac536f76a834923a50ae970f0e85f3e/FLAGcaae51cd4 [2021-11-13 18:34:56,019 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:34:56,020 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c [2021-11-13 18:34:56,046 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/data/f490c8e68/7ac536f76a834923a50ae970f0e85f3e/FLAGcaae51cd4 [2021-11-13 18:34:56,285 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/data/f490c8e68/7ac536f76a834923a50ae970f0e85f3e [2021-11-13 18:34:56,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:34:56,292 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:34:56,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:34:56,297 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:34:56,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:34:56,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:34:56" (1/1) ... [2021-11-13 18:34:56,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bca17a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:56, skipping insertion in model container [2021-11-13 18:34:56,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:34:56" (1/1) ... [2021-11-13 18:34:56,315 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:34:56,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:34:56,813 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_c6a26d20-86bd-4b1f-93c0-f8211105feb0/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c[14680,14693] [2021-11-13 18:34:56,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:34:56,828 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:34:56,943 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_c6a26d20-86bd-4b1f-93c0-f8211105feb0/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c[14680,14693] [2021-11-13 18:34:56,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:34:56,968 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:34:56,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:56 WrapperNode [2021-11-13 18:34:56,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:34:56,970 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:34:56,970 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:34:56,970 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:34:56,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:56" (1/1) ... [2021-11-13 18:34:56,994 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:56" (1/1) ... [2021-11-13 18:34:57,078 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:34:57,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:34:57,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:34:57,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:34:57,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:56" (1/1) ... [2021-11-13 18:34:57,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:56" (1/1) ... [2021-11-13 18:34:57,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:56" (1/1) ... [2021-11-13 18:34:57,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:56" (1/1) ... [2021-11-13 18:34:57,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:56" (1/1) ... [2021-11-13 18:34:57,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:56" (1/1) ... [2021-11-13 18:34:57,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:56" (1/1) ... [2021-11-13 18:34:57,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:34:57,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:34:57,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:34:57,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:34:57,147 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:56" (1/1) ... [2021-11-13 18:34:57,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:34:57,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:34:57,202 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:34:57,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:34:57,263 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2021-11-13 18:34:57,264 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2021-11-13 18:34:57,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:34:57,264 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2021-11-13 18:34:57,265 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2021-11-13 18:34:57,265 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-11-13 18:34:57,265 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2021-11-13 18:34:57,268 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2021-11-13 18:34:57,268 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2021-11-13 18:34:57,269 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 18:34:57,269 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 18:34:57,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:34:57,270 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2021-11-13 18:34:57,270 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2021-11-13 18:34:57,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:34:57,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:34:57,270 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2021-11-13 18:34:57,271 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2021-11-13 18:34:58,263 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:34:58,263 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 18:34:58,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:34:58 BoogieIcfgContainer [2021-11-13 18:34:58,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:34:58,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:34:58,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:34:58,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:34:58,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:34:56" (1/3) ... [2021-11-13 18:34:58,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21702ec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:34:58, skipping insertion in model container [2021-11-13 18:34:58,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:56" (2/3) ... [2021-11-13 18:34:58,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21702ec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:34:58, skipping insertion in model container [2021-11-13 18:34:58,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:34:58" (3/3) ... [2021-11-13 18:34:58,283 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c [2021-11-13 18:34:58,292 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:34:58,292 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:34:58,359 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:34:58,369 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 18:34:58,370 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:34:58,403 INFO L276 IsEmpty]: Start isEmpty. Operand has 206 states, 166 states have (on average 1.5542168674698795) internal successors, (258), 168 states have internal predecessors, (258), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-13 18:34:58,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-13 18:34:58,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:34:58,416 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:34:58,416 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:34:58,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:34:58,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1527920627, now seen corresponding path program 1 times [2021-11-13 18:34:58,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:34:58,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758570149] [2021-11-13 18:34:58,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:34:58,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:34:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:34:58,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:34:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:34:58,739 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 18:34:58,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:34:58,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758570149] [2021-11-13 18:34:58,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758570149] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:34:58,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:34:58,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:34:58,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648404931] [2021-11-13 18:34:58,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:34:58,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 18:34:58,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:34:58,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 18:34:58,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:34:58,800 INFO L87 Difference]: Start difference. First operand has 206 states, 166 states have (on average 1.5542168674698795) internal successors, (258), 168 states have internal predecessors, (258), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:34:58,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:34:58,902 INFO L93 Difference]: Finished difference Result 392 states and 637 transitions. [2021-11-13 18:34:58,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:34:58,905 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-11-13 18:34:58,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:34:58,923 INFO L225 Difference]: With dead ends: 392 [2021-11-13 18:34:58,924 INFO L226 Difference]: Without dead ends: 202 [2021-11-13 18:34:58,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 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 18:34:58,942 INFO L933 BasicCegarLoop]: 307 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, 307 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.03ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:34:58,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 8.03ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:34:58,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-13 18:34:59,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2021-11-13 18:34:59,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 163 states have (on average 1.5030674846625767) internal successors, (245), 164 states have internal predecessors, (245), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-13 18:34:59,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 307 transitions. [2021-11-13 18:34:59,035 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 307 transitions. Word has length 44 [2021-11-13 18:34:59,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:34:59,036 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 307 transitions. [2021-11-13 18:34:59,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:34:59,037 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 307 transitions. [2021-11-13 18:34:59,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-13 18:34:59,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:34:59,043 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:34:59,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:34:59,044 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:34:59,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:34:59,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1536686131, now seen corresponding path program 1 times [2021-11-13 18:34:59,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:34:59,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785433052] [2021-11-13 18:34:59,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:34:59,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:34:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:34:59,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:34:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:34:59,238 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 18:34:59,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:34:59,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785433052] [2021-11-13 18:34:59,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785433052] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:34:59,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:34:59,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:34:59,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28810870] [2021-11-13 18:34:59,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:34:59,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:34:59,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:34:59,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:34:59,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:34:59,249 INFO L87 Difference]: Start difference. First operand 202 states and 307 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:34:59,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:34:59,374 INFO L93 Difference]: Finished difference Result 390 states and 588 transitions. [2021-11-13 18:34:59,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:34:59,374 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-11-13 18:34:59,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:34:59,377 INFO L225 Difference]: With dead ends: 390 [2021-11-13 18:34:59,377 INFO L226 Difference]: Without dead ends: 202 [2021-11-13 18:34:59,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:34:59,380 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 171 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1298 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.23ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.63ms IncrementalHoareTripleChecker+Time [2021-11-13 18:34:59,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 1298 Invalid, 37 Unknown, 0 Unchecked, 14.23ms Time], IncrementalHoareTripleChecker [12 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 39.63ms Time] [2021-11-13 18:34:59,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-13 18:34:59,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2021-11-13 18:34:59,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 163 states have (on average 1.4294478527607362) internal successors, (233), 164 states have internal predecessors, (233), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-13 18:34:59,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 295 transitions. [2021-11-13 18:34:59,413 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 295 transitions. Word has length 44 [2021-11-13 18:34:59,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:34:59,414 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 295 transitions. [2021-11-13 18:34:59,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:34:59,414 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 295 transitions. [2021-11-13 18:34:59,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-13 18:34:59,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:34:59,417 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:34:59,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:34:59,417 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:34:59,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:34:59,418 INFO L85 PathProgramCache]: Analyzing trace with hash 2082780786, now seen corresponding path program 1 times [2021-11-13 18:34:59,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:34:59,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352529129] [2021-11-13 18:34:59,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:34:59,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:34:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:34:59,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:34:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:34:59,588 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 18:34:59,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:34:59,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352529129] [2021-11-13 18:34:59,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352529129] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:34:59,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:34:59,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:34:59,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303848827] [2021-11-13 18:34:59,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:34:59,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:34:59,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:34:59,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:34:59,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:34:59,594 INFO L87 Difference]: Start difference. First operand 202 states and 295 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:34:59,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:34:59,693 INFO L93 Difference]: Finished difference Result 391 states and 580 transitions. [2021-11-13 18:34:59,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:34:59,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-11-13 18:34:59,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:34:59,698 INFO L225 Difference]: With dead ends: 391 [2021-11-13 18:34:59,698 INFO L226 Difference]: Without dead ends: 206 [2021-11-13 18:34:59,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:34:59,708 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 5 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.21ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.75ms IncrementalHoareTripleChecker+Time [2021-11-13 18:34:59,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 857 Invalid, 27 Unknown, 0 Unchecked, 6.21ms Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 47.75ms Time] [2021-11-13 18:34:59,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-13 18:34:59,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2021-11-13 18:34:59,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 166 states have (on average 1.4216867469879517) internal successors, (236), 167 states have internal predecessors, (236), 31 states have call successors, (31), 8 states have call predecessors, (31), 8 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-13 18:34:59,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 298 transitions. [2021-11-13 18:34:59,735 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 298 transitions. Word has length 55 [2021-11-13 18:34:59,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:34:59,737 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 298 transitions. [2021-11-13 18:34:59,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:34:59,738 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 298 transitions. [2021-11-13 18:34:59,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-13 18:34:59,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:34:59,744 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:34:59,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:34:59,744 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:34:59,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:34:59,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1990587108, now seen corresponding path program 1 times [2021-11-13 18:34:59,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:34:59,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545700404] [2021-11-13 18:34:59,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:34:59,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:34:59,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:34:59,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:34:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:34:59,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:34:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:34:59,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 18:34:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:34:59,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:34:59,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:34:59,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545700404] [2021-11-13 18:34:59,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545700404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:34:59,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:34:59,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:34:59,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401786531] [2021-11-13 18:34:59,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:34:59,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:34:59,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:34:59,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:34:59,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:34:59,868 INFO L87 Difference]: Start difference. First operand 206 states and 298 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:34:59,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:34:59,932 INFO L93 Difference]: Finished difference Result 561 states and 823 transitions. [2021-11-13 18:34:59,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:34:59,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 71 [2021-11-13 18:34:59,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:34:59,937 INFO L225 Difference]: With dead ends: 561 [2021-11-13 18:34:59,938 INFO L226 Difference]: Without dead ends: 372 [2021-11-13 18:34:59,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:34:59,940 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 226 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.30ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.76ms IncrementalHoareTripleChecker+Time [2021-11-13 18:34:59,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 620 Invalid, 8 Unknown, 0 Unchecked, 5.30ms Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 14.76ms Time] [2021-11-13 18:34:59,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-11-13 18:34:59,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 363. [2021-11-13 18:34:59,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 286 states have (on average 1.4405594405594406) internal successors, (412), 288 states have internal predecessors, (412), 60 states have call successors, (60), 16 states have call predecessors, (60), 16 states have return successors, (60), 59 states have call predecessors, (60), 60 states have call successors, (60) [2021-11-13 18:34:59,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 532 transitions. [2021-11-13 18:34:59,977 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 532 transitions. Word has length 71 [2021-11-13 18:34:59,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:34:59,977 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 532 transitions. [2021-11-13 18:34:59,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:34:59,978 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 532 transitions. [2021-11-13 18:34:59,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-13 18:34:59,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:34:59,981 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:34:59,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:34:59,987 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:34:59,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:34:59,987 INFO L85 PathProgramCache]: Analyzing trace with hash 687571372, now seen corresponding path program 1 times [2021-11-13 18:34:59,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:34:59,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72645673] [2021-11-13 18:34:59,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:34:59,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:00,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:00,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:00,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:35:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:00,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-13 18:35:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:35:00,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:00,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72645673] [2021-11-13 18:35:00,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72645673] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:00,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:00,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:35:00,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617188793] [2021-11-13 18:35:00,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:00,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:35:00,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:00,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:35:00,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:35:00,134 INFO L87 Difference]: Start difference. First operand 363 states and 532 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:35:00,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:00,221 INFO L93 Difference]: Finished difference Result 1006 states and 1489 transitions. [2021-11-13 18:35:00,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:35:00,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 72 [2021-11-13 18:35:00,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:00,233 INFO L225 Difference]: With dead ends: 1006 [2021-11-13 18:35:00,233 INFO L226 Difference]: Without dead ends: 660 [2021-11-13 18:35:00,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:35:00,238 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 234 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.81ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.42ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:00,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 655 Invalid, 8 Unknown, 0 Unchecked, 5.81ms Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 16.42ms Time] [2021-11-13 18:35:00,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-11-13 18:35:00,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 643. [2021-11-13 18:35:00,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 494 states have (on average 1.459514170040486) internal successors, (721), 498 states have internal predecessors, (721), 117 states have call successors, (117), 31 states have call predecessors, (117), 31 states have return successors, (117), 114 states have call predecessors, (117), 117 states have call successors, (117) [2021-11-13 18:35:00,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 955 transitions. [2021-11-13 18:35:00,319 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 955 transitions. Word has length 72 [2021-11-13 18:35:00,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:00,319 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 955 transitions. [2021-11-13 18:35:00,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:35:00,320 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 955 transitions. [2021-11-13 18:35:00,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-13 18:35:00,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:00,322 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:00,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:35:00,323 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:00,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:00,323 INFO L85 PathProgramCache]: Analyzing trace with hash -592292306, now seen corresponding path program 1 times [2021-11-13 18:35:00,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:00,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910320748] [2021-11-13 18:35:00,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:00,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:00,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:00,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:00,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:00,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:35:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:00,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-13 18:35:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:00,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:35:00,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:00,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910320748] [2021-11-13 18:35:00,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910320748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:00,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:00,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:35:00,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290942290] [2021-11-13 18:35:00,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:00,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:35:00,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:00,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:35:00,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:35:00,433 INFO L87 Difference]: Start difference. First operand 643 states and 955 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:35:00,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:00,820 INFO L93 Difference]: Finished difference Result 1799 states and 2717 transitions. [2021-11-13 18:35:00,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:35:00,821 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 72 [2021-11-13 18:35:00,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:00,831 INFO L225 Difference]: With dead ends: 1799 [2021-11-13 18:35:00,831 INFO L226 Difference]: Without dead ends: 1173 [2021-11-13 18:35:00,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:35:00,835 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 783 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 195.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.71ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 247.29ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:00,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 775 Invalid, 294 Unknown, 0 Unchecked, 10.71ms Time], IncrementalHoareTripleChecker [69 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 247.29ms Time] [2021-11-13 18:35:00,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-11-13 18:35:00,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 768. [2021-11-13 18:35:00,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 606 states have (on average 1.4372937293729373) internal successors, (871), 609 states have internal predecessors, (871), 124 states have call successors, (124), 37 states have call predecessors, (124), 37 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-11-13 18:35:00,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1119 transitions. [2021-11-13 18:35:00,913 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1119 transitions. Word has length 72 [2021-11-13 18:35:00,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:00,913 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 1119 transitions. [2021-11-13 18:35:00,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:35:00,914 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1119 transitions. [2021-11-13 18:35:00,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-13 18:35:00,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:00,916 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:00,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:35:00,917 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:00,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:00,917 INFO L85 PathProgramCache]: Analyzing trace with hash 9157699, now seen corresponding path program 1 times [2021-11-13 18:35:00,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:00,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858756037] [2021-11-13 18:35:00,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:00,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:00,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:00,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:00,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:00,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:35:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:00,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 18:35:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:35:01,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:01,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858756037] [2021-11-13 18:35:01,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858756037] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:01,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:01,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:35:01,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590693748] [2021-11-13 18:35:01,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:01,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:35:01,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:01,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:35:01,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:35:01,007 INFO L87 Difference]: Start difference. First operand 768 states and 1119 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:35:01,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:01,403 INFO L93 Difference]: Finished difference Result 1803 states and 2717 transitions. [2021-11-13 18:35:01,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:35:01,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 73 [2021-11-13 18:35:01,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:01,414 INFO L225 Difference]: With dead ends: 1803 [2021-11-13 18:35:01,414 INFO L226 Difference]: Without dead ends: 1177 [2021-11-13 18:35:01,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:35:01,419 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 780 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 210.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.31ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 262.88ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:01,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 777 Invalid, 294 Unknown, 0 Unchecked, 11.31ms Time], IncrementalHoareTripleChecker [69 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 262.88ms Time] [2021-11-13 18:35:01,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-11-13 18:35:01,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 776. [2021-11-13 18:35:01,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 614 states have (on average 1.4315960912052117) internal successors, (879), 617 states have internal predecessors, (879), 124 states have call successors, (124), 37 states have call predecessors, (124), 37 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-11-13 18:35:01,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1127 transitions. [2021-11-13 18:35:01,504 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1127 transitions. Word has length 73 [2021-11-13 18:35:01,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:01,504 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 1127 transitions. [2021-11-13 18:35:01,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:35:01,505 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1127 transitions. [2021-11-13 18:35:01,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-13 18:35:01,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:01,507 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:01,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:35:01,508 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:01,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:01,508 INFO L85 PathProgramCache]: Analyzing trace with hash 341297525, now seen corresponding path program 1 times [2021-11-13 18:35:01,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:01,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362773798] [2021-11-13 18:35:01,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:01,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:01,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:01,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:35:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:01,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-13 18:35:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:01,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:35:01,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:01,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362773798] [2021-11-13 18:35:01,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362773798] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:01,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:01,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:35:01,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519541507] [2021-11-13 18:35:01,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:01,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:35:01,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:01,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:35:01,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:35:01,611 INFO L87 Difference]: Start difference. First operand 776 states and 1127 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:35:01,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:01,981 INFO L93 Difference]: Finished difference Result 1803 states and 2709 transitions. [2021-11-13 18:35:01,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:35:01,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 75 [2021-11-13 18:35:01,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:01,993 INFO L225 Difference]: With dead ends: 1803 [2021-11-13 18:35:01,993 INFO L226 Difference]: Without dead ends: 1177 [2021-11-13 18:35:01,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:35:01,997 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 237 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 204.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.06ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 251.78ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:01,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 744 Invalid, 260 Unknown, 0 Unchecked, 7.06ms Time], IncrementalHoareTripleChecker [4 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 251.78ms Time] [2021-11-13 18:35:02,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-11-13 18:35:02,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 776. [2021-11-13 18:35:02,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 614 states have (on average 1.4250814332247557) internal successors, (875), 617 states have internal predecessors, (875), 124 states have call successors, (124), 37 states have call predecessors, (124), 37 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-11-13 18:35:02,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1123 transitions. [2021-11-13 18:35:02,089 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1123 transitions. Word has length 75 [2021-11-13 18:35:02,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:02,090 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 1123 transitions. [2021-11-13 18:35:02,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:35:02,090 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1123 transitions. [2021-11-13 18:35:02,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-13 18:35:02,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:02,092 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:02,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 18:35:02,093 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:02,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:02,093 INFO L85 PathProgramCache]: Analyzing trace with hash 662931196, now seen corresponding path program 1 times [2021-11-13 18:35:02,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:02,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513161106] [2021-11-13 18:35:02,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:02,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:02,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:02,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:02,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:35:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:02,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-13 18:35:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:02,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:35:02,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:02,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513161106] [2021-11-13 18:35:02,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513161106] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:02,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:02,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:35:02,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495287069] [2021-11-13 18:35:02,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:02,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:35:02,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:02,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:35:02,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:35:02,193 INFO L87 Difference]: Start difference. First operand 776 states and 1123 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:35:02,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:02,271 INFO L93 Difference]: Finished difference Result 1422 states and 2088 transitions. [2021-11-13 18:35:02,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:35:02,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 76 [2021-11-13 18:35:02,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:02,279 INFO L225 Difference]: With dead ends: 1422 [2021-11-13 18:35:02,279 INFO L226 Difference]: Without dead ends: 796 [2021-11-13 18:35:02,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:35:02,283 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 6 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.07ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.05ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:02,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 869 Invalid, 16 Unknown, 0 Unchecked, 3.07ms Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 14.05ms Time] [2021-11-13 18:35:02,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-11-13 18:35:02,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 796. [2021-11-13 18:35:02,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 630 states have (on average 1.4142857142857144) internal successors, (891), 633 states have internal predecessors, (891), 124 states have call successors, (124), 41 states have call predecessors, (124), 41 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-11-13 18:35:02,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1139 transitions. [2021-11-13 18:35:02,347 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1139 transitions. Word has length 76 [2021-11-13 18:35:02,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:02,347 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 1139 transitions. [2021-11-13 18:35:02,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:35:02,348 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1139 transitions. [2021-11-13 18:35:02,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-13 18:35:02,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:02,350 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:02,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 18:35:02,351 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:02,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:02,352 INFO L85 PathProgramCache]: Analyzing trace with hash -520002270, now seen corresponding path program 1 times [2021-11-13 18:35:02,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:02,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563564744] [2021-11-13 18:35:02,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:02,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:02,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:02,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:02,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:35:02,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:02,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-13 18:35:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:02,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 18:35:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:35:02,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:02,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563564744] [2021-11-13 18:35:02,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563564744] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:02,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:02,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:35:02,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784275162] [2021-11-13 18:35:02,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:02,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:35:02,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:02,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:35:02,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:35:02,454 INFO L87 Difference]: Start difference. First operand 796 states and 1139 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 18:35:02,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:02,562 INFO L93 Difference]: Finished difference Result 1462 states and 2132 transitions. [2021-11-13 18:35:02,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:35:02,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 84 [2021-11-13 18:35:02,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:02,569 INFO L225 Difference]: With dead ends: 1462 [2021-11-13 18:35:02,569 INFO L226 Difference]: Without dead ends: 816 [2021-11-13 18:35:02,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:35:02,572 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 6 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.12ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.52ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:02,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 855 Invalid, 30 Unknown, 0 Unchecked, 3.12ms Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 24.52ms Time] [2021-11-13 18:35:02,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-11-13 18:35:02,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 816. [2021-11-13 18:35:02,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 646 states have (on average 1.4040247678018576) internal successors, (907), 649 states have internal predecessors, (907), 124 states have call successors, (124), 45 states have call predecessors, (124), 45 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-11-13 18:35:02,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1155 transitions. [2021-11-13 18:35:02,636 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1155 transitions. Word has length 84 [2021-11-13 18:35:02,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:02,637 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 1155 transitions. [2021-11-13 18:35:02,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 18:35:02,637 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1155 transitions. [2021-11-13 18:35:02,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-13 18:35:02,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:02,640 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:02,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 18:35:02,640 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:02,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:02,641 INFO L85 PathProgramCache]: Analyzing trace with hash -285867028, now seen corresponding path program 1 times [2021-11-13 18:35:02,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:02,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130104866] [2021-11-13 18:35:02,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:02,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:02,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:02,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:02,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:35:02,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:02,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-13 18:35:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:02,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 18:35:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:02,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:35:02,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:02,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:35:02,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:02,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130104866] [2021-11-13 18:35:02,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130104866] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:02,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:02,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:35:02,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586886186] [2021-11-13 18:35:02,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:02,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:35:02,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:02,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:35:02,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:35:02,735 INFO L87 Difference]: Start difference. First operand 816 states and 1155 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 18:35:02,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:02,819 INFO L93 Difference]: Finished difference Result 1498 states and 2148 transitions. [2021-11-13 18:35:02,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:35:02,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 92 [2021-11-13 18:35:02,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:02,826 INFO L225 Difference]: With dead ends: 1498 [2021-11-13 18:35:02,827 INFO L226 Difference]: Without dead ends: 832 [2021-11-13 18:35:02,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:35:02,830 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 5 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.19ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.14ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:02,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 864 Invalid, 22 Unknown, 0 Unchecked, 3.19ms Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 19.14ms Time] [2021-11-13 18:35:02,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-11-13 18:35:02,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 832. [2021-11-13 18:35:02,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 658 states have (on average 1.3966565349544073) internal successors, (919), 661 states have internal predecessors, (919), 124 states have call successors, (124), 49 states have call predecessors, (124), 49 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-11-13 18:35:02,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1167 transitions. [2021-11-13 18:35:02,890 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1167 transitions. Word has length 92 [2021-11-13 18:35:02,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:02,891 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 1167 transitions. [2021-11-13 18:35:02,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 18:35:02,891 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1167 transitions. [2021-11-13 18:35:02,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-13 18:35:02,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:02,894 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:02,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 18:35:02,894 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:02,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:02,895 INFO L85 PathProgramCache]: Analyzing trace with hash 2110592275, now seen corresponding path program 1 times [2021-11-13 18:35:02,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:02,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940816966] [2021-11-13 18:35:02,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:02,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:02,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:03,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:03,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:35:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:03,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-13 18:35:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:03,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 18:35:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:03,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:35:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:35:03,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:03,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940816966] [2021-11-13 18:35:03,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940816966] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:03,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:03,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:35:03,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047214061] [2021-11-13 18:35:03,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:03,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:35:03,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:03,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:35:03,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:35:03,025 INFO L87 Difference]: Start difference. First operand 832 states and 1167 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 18:35:03,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:03,124 INFO L93 Difference]: Finished difference Result 1534 states and 2188 transitions. [2021-11-13 18:35:03,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:35:03,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 92 [2021-11-13 18:35:03,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:03,131 INFO L225 Difference]: With dead ends: 1534 [2021-11-13 18:35:03,131 INFO L226 Difference]: Without dead ends: 852 [2021-11-13 18:35:03,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:35:03,135 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 6 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.17ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.43ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:03,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 855 Invalid, 30 Unknown, 0 Unchecked, 3.17ms Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 26.43ms Time] [2021-11-13 18:35:03,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-11-13 18:35:03,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 852. [2021-11-13 18:35:03,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 674 states have (on average 1.3872403560830862) internal successors, (935), 677 states have internal predecessors, (935), 124 states have call successors, (124), 53 states have call predecessors, (124), 53 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-11-13 18:35:03,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1183 transitions. [2021-11-13 18:35:03,197 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1183 transitions. Word has length 92 [2021-11-13 18:35:03,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:03,197 INFO L470 AbstractCegarLoop]: Abstraction has 852 states and 1183 transitions. [2021-11-13 18:35:03,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 18:35:03,198 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1183 transitions. [2021-11-13 18:35:03,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-13 18:35:03,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:03,202 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:03,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 18:35:03,203 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:03,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:03,203 INFO L85 PathProgramCache]: Analyzing trace with hash 483840627, now seen corresponding path program 1 times [2021-11-13 18:35:03,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:03,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441614518] [2021-11-13 18:35:03,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:03,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:03,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:03,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:35:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:03,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-13 18:35:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:03,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 18:35:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:03,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:35:03,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:03,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-13 18:35:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:35:03,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:03,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441614518] [2021-11-13 18:35:03,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441614518] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:03,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:03,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:35:03,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126587799] [2021-11-13 18:35:03,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:03,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:35:03,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:03,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:35:03,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:35:03,338 INFO L87 Difference]: Start difference. First operand 852 states and 1183 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-13 18:35:03,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:03,432 INFO L93 Difference]: Finished difference Result 1578 states and 2216 transitions. [2021-11-13 18:35:03,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:35:03,432 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 100 [2021-11-13 18:35:03,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:03,440 INFO L225 Difference]: With dead ends: 1578 [2021-11-13 18:35:03,441 INFO L226 Difference]: Without dead ends: 876 [2021-11-13 18:35:03,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:35:03,444 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 7 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.04ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.53ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:03,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 866 Invalid, 22 Unknown, 0 Unchecked, 3.04ms Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 20.53ms Time] [2021-11-13 18:35:03,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2021-11-13 18:35:03,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 876. [2021-11-13 18:35:03,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 694 states have (on average 1.3760806916426513) internal successors, (955), 697 states have internal predecessors, (955), 124 states have call successors, (124), 57 states have call predecessors, (124), 57 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-11-13 18:35:03,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1203 transitions. [2021-11-13 18:35:03,528 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1203 transitions. Word has length 100 [2021-11-13 18:35:03,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:03,529 INFO L470 AbstractCegarLoop]: Abstraction has 876 states and 1203 transitions. [2021-11-13 18:35:03,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-13 18:35:03,529 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1203 transitions. [2021-11-13 18:35:03,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-13 18:35:03,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:03,535 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:03,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 18:35:03,535 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:03,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:03,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1857958922, now seen corresponding path program 1 times [2021-11-13 18:35:03,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:03,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561037545] [2021-11-13 18:35:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:03,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:03,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:03,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:35:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:03,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-13 18:35:03,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:03,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 18:35:03,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:03,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:35:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:03,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-13 18:35:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:03,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-13 18:35:03,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 18:35:03,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:03,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561037545] [2021-11-13 18:35:03,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561037545] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:03,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:03,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:35:03,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320224083] [2021-11-13 18:35:03,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:03,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:35:03,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:03,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:35:03,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:35:03,756 INFO L87 Difference]: Start difference. First operand 876 states and 1203 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-13 18:35:04,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:04,073 INFO L93 Difference]: Finished difference Result 2489 states and 3477 transitions. [2021-11-13 18:35:04,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:35:04,073 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 103 [2021-11-13 18:35:04,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:04,086 INFO L225 Difference]: With dead ends: 2489 [2021-11-13 18:35:04,086 INFO L226 Difference]: Without dead ends: 1763 [2021-11-13 18:35:04,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:35:04,090 INFO L933 BasicCegarLoop]: 417 mSDtfsCounter, 392 mSDsluCounter, 1888 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 137.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 2305 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.21ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 165.73ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:04,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 2305 Invalid, 193 Unknown, 0 Unchecked, 10.21ms Time], IncrementalHoareTripleChecker [36 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 165.73ms Time] [2021-11-13 18:35:04,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2021-11-13 18:35:04,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1160. [2021-11-13 18:35:04,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 905 states have (on average 1.3668508287292818) internal successors, (1237), 910 states have internal predecessors, (1237), 172 states have call successors, (172), 82 states have call predecessors, (172), 82 states have return successors, (172), 167 states have call predecessors, (172), 172 states have call successors, (172) [2021-11-13 18:35:04,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1581 transitions. [2021-11-13 18:35:04,224 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1581 transitions. Word has length 103 [2021-11-13 18:35:04,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:04,224 INFO L470 AbstractCegarLoop]: Abstraction has 1160 states and 1581 transitions. [2021-11-13 18:35:04,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-13 18:35:04,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1581 transitions. [2021-11-13 18:35:04,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-13 18:35:04,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:04,227 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:04,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 18:35:04,227 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:04,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:04,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1544619372, now seen corresponding path program 1 times [2021-11-13 18:35:04,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:04,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747846804] [2021-11-13 18:35:04,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:04,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:04,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:04,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:04,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:35:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:04,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-13 18:35:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:04,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 18:35:04,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:04,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:35:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:04,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-13 18:35:04,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:04,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-13 18:35:04,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:04,339 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 18:35:04,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:04,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747846804] [2021-11-13 18:35:04,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747846804] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:04,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:04,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:35:04,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788810867] [2021-11-13 18:35:04,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:04,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:35:04,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:04,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:35:04,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:35:04,342 INFO L87 Difference]: Start difference. First operand 1160 states and 1581 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-13 18:35:04,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:04,436 INFO L93 Difference]: Finished difference Result 2126 states and 2924 transitions. [2021-11-13 18:35:04,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:35:04,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 107 [2021-11-13 18:35:04,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:04,445 INFO L225 Difference]: With dead ends: 2126 [2021-11-13 18:35:04,445 INFO L226 Difference]: Without dead ends: 1184 [2021-11-13 18:35:04,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:35:04,451 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 5 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.64ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.31ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:04,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 864 Invalid, 22 Unknown, 0 Unchecked, 2.64ms Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 18.31ms Time] [2021-11-13 18:35:04,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-11-13 18:35:04,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 1184. [2021-11-13 18:35:04,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 923 states have (on average 1.3596966413867821) internal successors, (1255), 928 states have internal predecessors, (1255), 172 states have call successors, (172), 88 states have call predecessors, (172), 88 states have return successors, (172), 167 states have call predecessors, (172), 172 states have call successors, (172) [2021-11-13 18:35:04,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1599 transitions. [2021-11-13 18:35:04,542 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1599 transitions. Word has length 107 [2021-11-13 18:35:04,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:04,542 INFO L470 AbstractCegarLoop]: Abstraction has 1184 states and 1599 transitions. [2021-11-13 18:35:04,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-13 18:35:04,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1599 transitions. [2021-11-13 18:35:04,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-13 18:35:04,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:04,545 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:04,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 18:35:04,546 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:04,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:04,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1746652564, now seen corresponding path program 1 times [2021-11-13 18:35:04,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:04,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438841281] [2021-11-13 18:35:04,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:04,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:04,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:04,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:04,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:35:04,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:04,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-13 18:35:04,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:04,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 18:35:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:04,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:35:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:04,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-13 18:35:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:04,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-13 18:35:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:04,683 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 18:35:04,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:04,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438841281] [2021-11-13 18:35:04,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438841281] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:04,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:04,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:35:04,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536092427] [2021-11-13 18:35:04,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:04,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:35:04,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:04,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:35:04,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:35:04,689 INFO L87 Difference]: Start difference. First operand 1184 states and 1599 transitions. Second operand has 6 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-13 18:35:04,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:04,896 INFO L93 Difference]: Finished difference Result 1655 states and 2343 transitions. [2021-11-13 18:35:04,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:35:04,896 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 106 [2021-11-13 18:35:04,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:04,908 INFO L225 Difference]: With dead ends: 1655 [2021-11-13 18:35:04,908 INFO L226 Difference]: Without dead ends: 1653 [2021-11-13 18:35:04,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:35:04,911 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 261 mSDsluCounter, 1740 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 2255 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.17ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.67ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:04,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 2255 Invalid, 55 Unknown, 0 Unchecked, 8.17ms Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 44.67ms Time] [2021-11-13 18:35:04,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2021-11-13 18:35:05,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1192. [2021-11-13 18:35:05,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 927 states have (on average 1.3581445523193096) internal successors, (1259), 934 states have internal predecessors, (1259), 174 states have call successors, (174), 90 states have call predecessors, (174), 90 states have return successors, (174), 167 states have call predecessors, (174), 174 states have call successors, (174) [2021-11-13 18:35:05,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1607 transitions. [2021-11-13 18:35:05,021 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1607 transitions. Word has length 106 [2021-11-13 18:35:05,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:05,021 INFO L470 AbstractCegarLoop]: Abstraction has 1192 states and 1607 transitions. [2021-11-13 18:35:05,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-13 18:35:05,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1607 transitions. [2021-11-13 18:35:05,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-13 18:35:05,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:05,024 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:05,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-13 18:35:05,025 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:05,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:05,025 INFO L85 PathProgramCache]: Analyzing trace with hash 285885957, now seen corresponding path program 1 times [2021-11-13 18:35:05,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:05,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236286224] [2021-11-13 18:35:05,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:05,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:05,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:05,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:05,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:35:05,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:05,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-13 18:35:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:05,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 18:35:05,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:05,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:35:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:05,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-13 18:35:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:05,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-13 18:35:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 18:35:05,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:05,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236286224] [2021-11-13 18:35:05,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236286224] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:05,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:05,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:35:05,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074469822] [2021-11-13 18:35:05,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:05,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:35:05,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:05,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:35:05,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:35:05,156 INFO L87 Difference]: Start difference. First operand 1192 states and 1607 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:35:05,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:05,449 INFO L93 Difference]: Finished difference Result 2446 states and 3360 transitions. [2021-11-13 18:35:05,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:35:05,449 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2021-11-13 18:35:05,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:05,460 INFO L225 Difference]: With dead ends: 2446 [2021-11-13 18:35:05,460 INFO L226 Difference]: Without dead ends: 1554 [2021-11-13 18:35:05,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:35:05,464 INFO L933 BasicCegarLoop]: 410 mSDtfsCounter, 524 mSDsluCounter, 1854 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 114.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 2264 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.52ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 134.56ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:05,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 2264 Invalid, 122 Unknown, 0 Unchecked, 9.52ms Time], IncrementalHoareTripleChecker [21 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 134.56ms Time] [2021-11-13 18:35:05,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2021-11-13 18:35:05,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1236. [2021-11-13 18:35:05,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 982 states have (on average 1.3482688391038697) internal successors, (1324), 994 states have internal predecessors, (1324), 162 states have call successors, (162), 91 states have call predecessors, (162), 91 states have return successors, (162), 150 states have call predecessors, (162), 162 states have call successors, (162) [2021-11-13 18:35:05,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1648 transitions. [2021-11-13 18:35:05,571 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1648 transitions. Word has length 109 [2021-11-13 18:35:05,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:05,572 INFO L470 AbstractCegarLoop]: Abstraction has 1236 states and 1648 transitions. [2021-11-13 18:35:05,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:35:05,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1648 transitions. [2021-11-13 18:35:05,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 18:35:05,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:05,575 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:05,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-13 18:35:05,575 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:05,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:05,576 INFO L85 PathProgramCache]: Analyzing trace with hash 641112124, now seen corresponding path program 1 times [2021-11-13 18:35:05,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:05,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963119635] [2021-11-13 18:35:05,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:05,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:05,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:05,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:05,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:05,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:35:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:05,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-13 18:35:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:05,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 18:35:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:05,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:35:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:05,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-13 18:35:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:05,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-13 18:35:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:05,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-13 18:35:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:05,736 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 18:35:05,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:05,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963119635] [2021-11-13 18:35:05,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963119635] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:05,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:05,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:35:05,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802275512] [2021-11-13 18:35:05,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:05,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:35:05,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:05,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:35:05,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:35:05,740 INFO L87 Difference]: Start difference. First operand 1236 states and 1648 transitions. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:35:06,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:06,062 INFO L93 Difference]: Finished difference Result 2538 states and 3469 transitions. [2021-11-13 18:35:06,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:35:06,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 111 [2021-11-13 18:35:06,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:06,075 INFO L225 Difference]: With dead ends: 2538 [2021-11-13 18:35:06,075 INFO L226 Difference]: Without dead ends: 1582 [2021-11-13 18:35:06,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:35:06,079 INFO L933 BasicCegarLoop]: 440 mSDtfsCounter, 396 mSDsluCounter, 1974 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 98.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 2414 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.07ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 133.68ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:06,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 2414 Invalid, 116 Unknown, 0 Unchecked, 10.07ms Time], IncrementalHoareTripleChecker [16 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 133.68ms Time] [2021-11-13 18:35:06,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-11-13 18:35:06,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1123. [2021-11-13 18:35:06,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 896 states have (on average 1.3493303571428572) internal successors, (1209), 906 states have internal predecessors, (1209), 145 states have call successors, (145), 81 states have call predecessors, (145), 81 states have return successors, (145), 135 states have call predecessors, (145), 145 states have call successors, (145) [2021-11-13 18:35:06,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1499 transitions. [2021-11-13 18:35:06,193 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1499 transitions. Word has length 111 [2021-11-13 18:35:06,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:06,194 INFO L470 AbstractCegarLoop]: Abstraction has 1123 states and 1499 transitions. [2021-11-13 18:35:06,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:35:06,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1499 transitions. [2021-11-13 18:35:06,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-13 18:35:06,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:06,196 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:06,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-13 18:35:06,197 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:06,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:06,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1939847605, now seen corresponding path program 1 times [2021-11-13 18:35:06,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:06,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980668522] [2021-11-13 18:35:06,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:06,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:06,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:06,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:06,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:35:06,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:06,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-13 18:35:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:06,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 18:35:06,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:06,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:35:06,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:06,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-13 18:35:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:06,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-13 18:35:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:06,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-13 18:35:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 18:35:06,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:06,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980668522] [2021-11-13 18:35:06,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980668522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:06,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:06,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:35:06,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045168957] [2021-11-13 18:35:06,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:06,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:35:06,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:06,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:35:06,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:35:06,414 INFO L87 Difference]: Start difference. First operand 1123 states and 1499 transitions. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 7 states have internal predecessors, (89), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-13 18:35:07,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:07,176 INFO L93 Difference]: Finished difference Result 2606 states and 3573 transitions. [2021-11-13 18:35:07,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:35:07,177 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 7 states have internal predecessors, (89), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 112 [2021-11-13 18:35:07,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:07,189 INFO L225 Difference]: With dead ends: 2606 [2021-11-13 18:35:07,189 INFO L226 Difference]: Without dead ends: 1683 [2021-11-13 18:35:07,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:35:07,192 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 1047 mSDsluCounter, 1646 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 428.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 2152 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.22ms SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 514.92ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:07,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1053 Valid, 2152 Invalid, 595 Unknown, 0 Unchecked, 14.22ms Time], IncrementalHoareTripleChecker [201 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 514.92ms Time] [2021-11-13 18:35:07,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2021-11-13 18:35:07,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1139. [2021-11-13 18:35:07,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 904 states have (on average 1.329646017699115) internal successors, (1202), 915 states have internal predecessors, (1202), 148 states have call successors, (148), 86 states have call predecessors, (148), 86 states have return successors, (148), 137 states have call predecessors, (148), 148 states have call successors, (148) [2021-11-13 18:35:07,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1498 transitions. [2021-11-13 18:35:07,302 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1498 transitions. Word has length 112 [2021-11-13 18:35:07,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:07,303 INFO L470 AbstractCegarLoop]: Abstraction has 1139 states and 1498 transitions. [2021-11-13 18:35:07,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 7 states have internal predecessors, (89), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-13 18:35:07,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1498 transitions. [2021-11-13 18:35:07,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-13 18:35:07,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:07,305 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:07,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-13 18:35:07,306 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:07,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:07,306 INFO L85 PathProgramCache]: Analyzing trace with hash 889695918, now seen corresponding path program 1 times [2021-11-13 18:35:07,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:07,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518353937] [2021-11-13 18:35:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:07,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:07,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:07,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:35:07,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:07,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-13 18:35:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:07,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 18:35:07,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:07,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:35:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:07,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-13 18:35:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:07,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-13 18:35:07,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:07,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-13 18:35:07,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:07,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:35:07,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:07,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518353937] [2021-11-13 18:35:07,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518353937] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:07,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:07,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:35:07,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988976919] [2021-11-13 18:35:07,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:07,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:35:07,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:07,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:35:07,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:35:07,398 INFO L87 Difference]: Start difference. First operand 1139 states and 1498 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:35:07,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:07,735 INFO L93 Difference]: Finished difference Result 3175 states and 4263 transitions. [2021-11-13 18:35:07,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:35:07,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 112 [2021-11-13 18:35:07,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:07,753 INFO L225 Difference]: With dead ends: 3175 [2021-11-13 18:35:07,753 INFO L226 Difference]: Without dead ends: 2287 [2021-11-13 18:35:07,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:35:07,757 INFO L933 BasicCegarLoop]: 510 mSDtfsCounter, 437 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 118.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.57ms SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 145.88ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:07,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 1223 Invalid, 147 Unknown, 0 Unchecked, 6.57ms Time], IncrementalHoareTripleChecker [60 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 145.88ms Time] [2021-11-13 18:35:07,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-11-13 18:35:07,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 1935. [2021-11-13 18:35:07,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1935 states, 1510 states have (on average 1.3271523178807947) internal successors, (2004), 1529 states have internal predecessors, (2004), 272 states have call successors, (272), 152 states have call predecessors, (272), 152 states have return successors, (272), 253 states have call predecessors, (272), 272 states have call successors, (272) [2021-11-13 18:35:07,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 2548 transitions. [2021-11-13 18:35:07,952 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 2548 transitions. Word has length 112 [2021-11-13 18:35:07,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:07,953 INFO L470 AbstractCegarLoop]: Abstraction has 1935 states and 2548 transitions. [2021-11-13 18:35:07,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:35:07,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 2548 transitions. [2021-11-13 18:35:07,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-13 18:35:07,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:07,957 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:07,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-13 18:35:07,957 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:07,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:07,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1041296419, now seen corresponding path program 1 times [2021-11-13 18:35:07,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:07,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150431154] [2021-11-13 18:35:07,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:07,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:08,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:08,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:08,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:35:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:08,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-13 18:35:08,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:08,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 18:35:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:08,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:35:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:08,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-13 18:35:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:08,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-13 18:35:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:08,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-13 18:35:08,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:08,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 18:35:08,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:08,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150431154] [2021-11-13 18:35:08,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150431154] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:08,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:08,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:35:08,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101488928] [2021-11-13 18:35:08,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:08,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:35:08,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:08,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:35:08,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:35:08,182 INFO L87 Difference]: Start difference. First operand 1935 states and 2548 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:35:09,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:09,095 INFO L93 Difference]: Finished difference Result 4386 states and 5918 transitions. [2021-11-13 18:35:09,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:35:09,096 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 114 [2021-11-13 18:35:09,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:09,117 INFO L225 Difference]: With dead ends: 4386 [2021-11-13 18:35:09,117 INFO L226 Difference]: Without dead ends: 2800 [2021-11-13 18:35:09,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:35:09,124 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 802 mSDsluCounter, 1930 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 447.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 2505 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.76ms SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 535.98ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:09,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [805 Valid, 2505 Invalid, 596 Unknown, 0 Unchecked, 14.76ms Time], IncrementalHoareTripleChecker [199 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 535.98ms Time] [2021-11-13 18:35:09,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2800 states. [2021-11-13 18:35:09,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2800 to 1954. [2021-11-13 18:35:09,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1954 states, 1516 states have (on average 1.3232189973614776) internal successors, (2006), 1536 states have internal predecessors, (2006), 280 states have call successors, (280), 157 states have call predecessors, (280), 157 states have return successors, (280), 260 states have call predecessors, (280), 280 states have call successors, (280) [2021-11-13 18:35:09,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1954 states to 1954 states and 2566 transitions. [2021-11-13 18:35:09,410 INFO L78 Accepts]: Start accepts. Automaton has 1954 states and 2566 transitions. Word has length 114 [2021-11-13 18:35:09,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:09,411 INFO L470 AbstractCegarLoop]: Abstraction has 1954 states and 2566 transitions. [2021-11-13 18:35:09,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:35:09,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1954 states and 2566 transitions. [2021-11-13 18:35:09,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-13 18:35:09,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:09,415 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:09,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-13 18:35:09,416 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:09,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:09,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1708808100, now seen corresponding path program 1 times [2021-11-13 18:35:09,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:09,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643479474] [2021-11-13 18:35:09,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:09,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:09,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:09,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-13 18:35:09,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:09,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 18:35:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:09,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:35:09,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:09,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-13 18:35:09,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:09,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-13 18:35:09,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:09,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-13 18:35:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:09,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-13 18:35:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:35:09,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:09,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643479474] [2021-11-13 18:35:09,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643479474] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:09,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:09,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:35:09,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410971513] [2021-11-13 18:35:09,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:09,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:35:09,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:09,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:35:09,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:35:09,533 INFO L87 Difference]: Start difference. First operand 1954 states and 2566 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:35:09,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:09,938 INFO L93 Difference]: Finished difference Result 5154 states and 6849 transitions. [2021-11-13 18:35:09,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:35:09,939 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 115 [2021-11-13 18:35:09,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:09,981 INFO L225 Difference]: With dead ends: 5154 [2021-11-13 18:35:09,983 INFO L226 Difference]: Without dead ends: 3584 [2021-11-13 18:35:09,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:35:09,990 INFO L933 BasicCegarLoop]: 526 mSDtfsCounter, 484 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.37ms SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 110.70ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:09,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 1287 Invalid, 137 Unknown, 0 Unchecked, 5.37ms Time], IncrementalHoareTripleChecker [56 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 110.70ms Time] [2021-11-13 18:35:09,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3584 states. [2021-11-13 18:35:10,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3584 to 3015. [2021-11-13 18:35:10,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3015 states, 2302 states have (on average 1.3192875760208513) internal successors, (3037), 2333 states have internal predecessors, (3037), 460 states have call successors, (460), 252 states have call predecessors, (460), 252 states have return successors, (460), 429 states have call predecessors, (460), 460 states have call successors, (460) [2021-11-13 18:35:10,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 3957 transitions. [2021-11-13 18:35:10,270 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 3957 transitions. Word has length 115 [2021-11-13 18:35:10,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:10,270 INFO L470 AbstractCegarLoop]: Abstraction has 3015 states and 3957 transitions. [2021-11-13 18:35:10,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:35:10,271 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 3957 transitions. [2021-11-13 18:35:10,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-13 18:35:10,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:10,275 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:10,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-13 18:35:10,276 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:10,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:10,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1228455916, now seen corresponding path program 1 times [2021-11-13 18:35:10,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:10,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075805917] [2021-11-13 18:35:10,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:10,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:10,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:10,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:10,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:35:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:10,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-13 18:35:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:10,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-13 18:35:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:10,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-13 18:35:10,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:10,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-13 18:35:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:10,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-13 18:35:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:10,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-13 18:35:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:35:10,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:10,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075805917] [2021-11-13 18:35:10,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075805917] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:10,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:10,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:35:10,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722624351] [2021-11-13 18:35:10,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:10,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:35:10,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:10,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:35:10,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:35:10,373 INFO L87 Difference]: Start difference. First operand 3015 states and 3957 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:35:10,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:10,915 INFO L93 Difference]: Finished difference Result 7127 states and 9424 transitions. [2021-11-13 18:35:10,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:35:10,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 115 [2021-11-13 18:35:10,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:10,938 INFO L225 Difference]: With dead ends: 7127 [2021-11-13 18:35:10,938 INFO L226 Difference]: Without dead ends: 4626 [2021-11-13 18:35:10,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:35:10,949 INFO L933 BasicCegarLoop]: 549 mSDtfsCounter, 431 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 110.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.65ms SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 138.52ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:10,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 1283 Invalid, 148 Unknown, 0 Unchecked, 5.65ms Time], IncrementalHoareTripleChecker [59 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 138.52ms Time] [2021-11-13 18:35:10,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4626 states. [2021-11-13 18:35:11,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4626 to 4292. [2021-11-13 18:35:11,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4292 states, 3255 states have (on average 1.3170506912442397) internal successors, (4287), 3299 states have internal predecessors, (4287), 672 states have call successors, (672), 364 states have call predecessors, (672), 364 states have return successors, (672), 628 states have call predecessors, (672), 672 states have call successors, (672) [2021-11-13 18:35:11,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 5631 transitions. [2021-11-13 18:35:11,395 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 5631 transitions. Word has length 115 [2021-11-13 18:35:11,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:11,395 INFO L470 AbstractCegarLoop]: Abstraction has 4292 states and 5631 transitions. [2021-11-13 18:35:11,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:35:11,396 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 5631 transitions. [2021-11-13 18:35:11,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-13 18:35:11,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:11,400 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:11,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-13 18:35:11,400 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:11,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:11,401 INFO L85 PathProgramCache]: Analyzing trace with hash 331094376, now seen corresponding path program 1 times [2021-11-13 18:35:11,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:11,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700288369] [2021-11-13 18:35:11,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:11,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:11,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:11,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:11,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:35:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:11,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-13 18:35:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:11,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-13 18:35:11,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:11,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-13 18:35:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:11,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:35:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:11,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-13 18:35:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:11,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-13 18:35:11,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:11,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:35:11,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:11,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700288369] [2021-11-13 18:35:11,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700288369] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:11,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:11,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:35:11,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935684145] [2021-11-13 18:35:11,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:11,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:35:11,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:11,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:35:11,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:35:11,472 INFO L87 Difference]: Start difference. First operand 4292 states and 5631 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:35:12,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:12,160 INFO L93 Difference]: Finished difference Result 9705 states and 13179 transitions. [2021-11-13 18:35:12,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:35:12,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 116 [2021-11-13 18:35:12,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:12,185 INFO L225 Difference]: With dead ends: 9705 [2021-11-13 18:35:12,186 INFO L226 Difference]: Without dead ends: 5818 [2021-11-13 18:35:12,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:35:12,198 INFO L933 BasicCegarLoop]: 458 mSDtfsCounter, 151 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.76ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 112.12ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:12,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 704 Invalid, 111 Unknown, 0 Unchecked, 3.76ms Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 112.12ms Time] [2021-11-13 18:35:12,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5818 states. [2021-11-13 18:35:12,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5818 to 4298. [2021-11-13 18:35:12,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4298 states, 3261 states have (on average 1.3164673413063477) internal successors, (4293), 3305 states have internal predecessors, (4293), 672 states have call successors, (672), 364 states have call predecessors, (672), 364 states have return successors, (672), 628 states have call predecessors, (672), 672 states have call successors, (672) [2021-11-13 18:35:12,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4298 states to 4298 states and 5637 transitions. [2021-11-13 18:35:12,667 INFO L78 Accepts]: Start accepts. Automaton has 4298 states and 5637 transitions. Word has length 116 [2021-11-13 18:35:12,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:12,667 INFO L470 AbstractCegarLoop]: Abstraction has 4298 states and 5637 transitions. [2021-11-13 18:35:12,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:35:12,668 INFO L276 IsEmpty]: Start isEmpty. Operand 4298 states and 5637 transitions. [2021-11-13 18:35:12,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-13 18:35:12,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:12,672 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:12,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-13 18:35:12,672 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:12,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:12,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1590062833, now seen corresponding path program 1 times [2021-11-13 18:35:12,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:12,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317454143] [2021-11-13 18:35:12,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:12,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:12,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:12,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:35:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:12,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-13 18:35:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:12,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-13 18:35:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:12,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-13 18:35:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:12,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-13 18:35:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:12,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-13 18:35:12,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:12,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-13 18:35:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:12,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:35:12,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:12,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317454143] [2021-11-13 18:35:12,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317454143] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:12,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:12,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:35:12,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124331080] [2021-11-13 18:35:12,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:12,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:35:12,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:12,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:35:12,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:35:12,777 INFO L87 Difference]: Start difference. First operand 4298 states and 5637 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:35:13,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:13,277 INFO L93 Difference]: Finished difference Result 9003 states and 12067 transitions. [2021-11-13 18:35:13,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:35:13,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 117 [2021-11-13 18:35:13,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:13,298 INFO L225 Difference]: With dead ends: 9003 [2021-11-13 18:35:13,299 INFO L226 Difference]: Without dead ends: 4802 [2021-11-13 18:35:13,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:35:13,310 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 369 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.04ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.58ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:13,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 882 Invalid, 27 Unknown, 0 Unchecked, 4.04ms Time], IncrementalHoareTripleChecker [11 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 37.58ms Time] [2021-11-13 18:35:13,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4802 states. [2021-11-13 18:35:13,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4802 to 3865. [2021-11-13 18:35:13,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3865 states, 2911 states have (on average 1.3229130882858124) internal successors, (3851), 2945 states have internal predecessors, (3851), 620 states have call successors, (620), 333 states have call predecessors, (620), 333 states have return successors, (620), 586 states have call predecessors, (620), 620 states have call successors, (620) [2021-11-13 18:35:13,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3865 states to 3865 states and 5091 transitions. [2021-11-13 18:35:13,694 INFO L78 Accepts]: Start accepts. Automaton has 3865 states and 5091 transitions. Word has length 117 [2021-11-13 18:35:13,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:13,695 INFO L470 AbstractCegarLoop]: Abstraction has 3865 states and 5091 transitions. [2021-11-13 18:35:13,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:35:13,695 INFO L276 IsEmpty]: Start isEmpty. Operand 3865 states and 5091 transitions. [2021-11-13 18:35:13,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-13 18:35:13,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:13,698 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:13,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-13 18:35:13,698 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:13,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:13,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1465420109, now seen corresponding path program 1 times [2021-11-13 18:35:13,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:13,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559618152] [2021-11-13 18:35:13,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:13,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:13,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:13,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:35:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:13,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-13 18:35:13,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:13,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-13 18:35:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:13,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-13 18:35:13,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:13,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:35:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:13,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-13 18:35:13,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:13,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-13 18:35:13,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:13,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:35:13,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:13,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559618152] [2021-11-13 18:35:13,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559618152] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:13,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:13,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:35:13,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681660062] [2021-11-13 18:35:13,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:13,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:35:13,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:13,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:35:13,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:35:13,768 INFO L87 Difference]: Start difference. First operand 3865 states and 5091 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:35:14,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:14,296 INFO L93 Difference]: Finished difference Result 8503 states and 11497 transitions. [2021-11-13 18:35:14,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:35:14,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 118 [2021-11-13 18:35:14,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:14,317 INFO L225 Difference]: With dead ends: 8503 [2021-11-13 18:35:14,318 INFO L226 Difference]: Without dead ends: 4851 [2021-11-13 18:35:14,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:35:14,329 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 151 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.29ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 126.87ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:14,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 680 Invalid, 111 Unknown, 0 Unchecked, 3.29ms Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 126.87ms Time] [2021-11-13 18:35:14,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4851 states. [2021-11-13 18:35:14,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4851 to 3875. [2021-11-13 18:35:14,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3875 states, 2921 states have (on average 1.3218076001369394) internal successors, (3861), 2955 states have internal predecessors, (3861), 620 states have call successors, (620), 333 states have call predecessors, (620), 333 states have return successors, (620), 586 states have call predecessors, (620), 620 states have call successors, (620) [2021-11-13 18:35:14,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 5101 transitions. [2021-11-13 18:35:14,773 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 5101 transitions. Word has length 118 [2021-11-13 18:35:14,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:14,773 INFO L470 AbstractCegarLoop]: Abstraction has 3875 states and 5101 transitions. [2021-11-13 18:35:14,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:35:14,774 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 5101 transitions. [2021-11-13 18:35:14,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-13 18:35:14,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:14,777 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:14,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-13 18:35:14,777 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:14,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:14,778 INFO L85 PathProgramCache]: Analyzing trace with hash -132784146, now seen corresponding path program 1 times [2021-11-13 18:35:14,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:14,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823163098] [2021-11-13 18:35:14,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:14,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:14,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:14,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:35:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:14,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-13 18:35:14,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:14,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-13 18:35:14,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:14,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-13 18:35:14,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:14,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:35:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:14,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-13 18:35:14,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:14,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-13 18:35:14,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:14,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:35:14,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:14,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823163098] [2021-11-13 18:35:14,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823163098] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:14,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:14,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:35:14,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017401865] [2021-11-13 18:35:14,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:14,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:35:14,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:14,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:35:14,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:35:14,888 INFO L87 Difference]: Start difference. First operand 3875 states and 5101 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:35:15,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:15,346 INFO L93 Difference]: Finished difference Result 8451 states and 11414 transitions. [2021-11-13 18:35:15,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:35:15,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 118 [2021-11-13 18:35:15,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:15,367 INFO L225 Difference]: With dead ends: 8451 [2021-11-13 18:35:15,368 INFO L226 Difference]: Without dead ends: 4722 [2021-11-13 18:35:15,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:35:15,380 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 284 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.47ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.54ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:15,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 913 Invalid, 24 Unknown, 0 Unchecked, 3.47ms Time], IncrementalHoareTripleChecker [9 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 25.54ms Time] [2021-11-13 18:35:15,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4722 states. [2021-11-13 18:35:15,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4722 to 2925. [2021-11-13 18:35:15,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2925 states, 2205 states have (on average 1.3133786848072562) internal successors, (2896), 2224 states have internal predecessors, (2896), 469 states have call successors, (469), 250 states have call predecessors, (469), 250 states have return successors, (469), 450 states have call predecessors, (469), 469 states have call successors, (469) [2021-11-13 18:35:15,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2925 states to 2925 states and 3834 transitions. [2021-11-13 18:35:15,739 INFO L78 Accepts]: Start accepts. Automaton has 2925 states and 3834 transitions. Word has length 118 [2021-11-13 18:35:15,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:15,740 INFO L470 AbstractCegarLoop]: Abstraction has 2925 states and 3834 transitions. [2021-11-13 18:35:15,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:35:15,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2925 states and 3834 transitions. [2021-11-13 18:35:15,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-13 18:35:15,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:15,748 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:15,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-13 18:35:15,750 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:15,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:15,750 INFO L85 PathProgramCache]: Analyzing trace with hash -664741411, now seen corresponding path program 1 times [2021-11-13 18:35:15,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:15,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379716690] [2021-11-13 18:35:15,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:15,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:15,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:15,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:15,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:15,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:35:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:15,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-13 18:35:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:15,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 18:35:15,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:15,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:35:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:15,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-13 18:35:15,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:15,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-13 18:35:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:15,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-13 18:35:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:15,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-11-13 18:35:15,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:15,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-13 18:35:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:15,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-11-13 18:35:15,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:15,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-11-13 18:35:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:15,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-11-13 18:35:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:15,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-11-13 18:35:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:15,973 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 16 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-13 18:35:15,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:15,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379716690] [2021-11-13 18:35:15,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379716690] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:35:15,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714428264] [2021-11-13 18:35:15,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:15,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:35:15,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:35:15,978 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:35:15,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:35:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:16,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 18:35:16,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:35:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 77 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 18:35:16,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:35:17,269 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-13 18:35:17,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714428264] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:35:17,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:35:17,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2021-11-13 18:35:17,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910787867] [2021-11-13 18:35:17,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:35:17,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:35:17,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:17,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:35:17,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:35:17,272 INFO L87 Difference]: Start difference. First operand 2925 states and 3834 transitions. Second operand has 14 states, 14 states have (on average 18.714285714285715) internal successors, (262), 13 states have internal predecessors, (262), 6 states have call successors, (37), 4 states have call predecessors, (37), 6 states have return successors, (37), 7 states have call predecessors, (37), 6 states have call successors, (37) [2021-11-13 18:35:21,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:21,406 INFO L93 Difference]: Finished difference Result 9990 states and 13988 transitions. [2021-11-13 18:35:21,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-13 18:35:21,407 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 18.714285714285715) internal successors, (262), 13 states have internal predecessors, (262), 6 states have call successors, (37), 4 states have call predecessors, (37), 6 states have return successors, (37), 7 states have call predecessors, (37), 6 states have call successors, (37) Word has length 185 [2021-11-13 18:35:21,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:21,436 INFO L225 Difference]: With dead ends: 9990 [2021-11-13 18:35:21,436 INFO L226 Difference]: Without dead ends: 7352 [2021-11-13 18:35:21,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 402 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=749, Invalid=3411, Unknown=0, NotChecked=0, Total=4160 [2021-11-13 18:35:21,446 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 4455 mSDsluCounter, 2937 mSDsCounter, 0 mSdLazyCounter, 2038 mSolverCounterSat, 1308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1743.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4455 SdHoareTripleChecker+Valid, 3273 SdHoareTripleChecker+Invalid, 3346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.11ms SdHoareTripleChecker+Time, 1308 IncrementalHoareTripleChecker+Valid, 2038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2117.76ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:21,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4455 Valid, 3273 Invalid, 3346 Unknown, 0 Unchecked, 32.11ms Time], IncrementalHoareTripleChecker [1308 Valid, 2038 Invalid, 0 Unknown, 0 Unchecked, 2117.76ms Time] [2021-11-13 18:35:21,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7352 states. [2021-11-13 18:35:21,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7352 to 3449. [2021-11-13 18:35:21,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3449 states, 2622 states have (on average 1.3093058733790999) internal successors, (3433), 2642 states have internal predecessors, (3433), 531 states have call successors, (531), 295 states have call predecessors, (531), 295 states have return successors, (531), 511 states have call predecessors, (531), 531 states have call successors, (531) [2021-11-13 18:35:21,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 4495 transitions. [2021-11-13 18:35:21,816 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 4495 transitions. Word has length 185 [2021-11-13 18:35:21,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:21,816 INFO L470 AbstractCegarLoop]: Abstraction has 3449 states and 4495 transitions. [2021-11-13 18:35:21,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.714285714285715) internal successors, (262), 13 states have internal predecessors, (262), 6 states have call successors, (37), 4 states have call predecessors, (37), 6 states have return successors, (37), 7 states have call predecessors, (37), 6 states have call successors, (37) [2021-11-13 18:35:21,817 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 4495 transitions. [2021-11-13 18:35:21,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-13 18:35:21,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:21,825 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:21,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:35:22,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-13 18:35:22,052 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:22,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:22,053 INFO L85 PathProgramCache]: Analyzing trace with hash 782511274, now seen corresponding path program 1 times [2021-11-13 18:35:22,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:22,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591321467] [2021-11-13 18:35:22,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:22,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:22,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:22,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:22,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:35:22,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:22,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-13 18:35:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:22,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 18:35:22,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:22,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:35:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:22,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-13 18:35:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:22,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-13 18:35:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:22,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-13 18:35:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:22,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-13 18:35:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:22,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 18:35:22,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:22,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-11-13 18:35:22,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:22,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-11-13 18:35:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:22,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-11-13 18:35:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:22,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-11-13 18:35:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:22,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-11-13 18:35:22,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-13 18:35:22,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:22,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591321467] [2021-11-13 18:35:22,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591321467] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:35:22,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101846179] [2021-11-13 18:35:22,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:22,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:35:22,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:35:22,386 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:35:22,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:35:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:22,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 18:35:22,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:35:23,121 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 53 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:35:23,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:35:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-13 18:35:23,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101846179] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:35:23,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:35:23,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2021-11-13 18:35:23,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096823738] [2021-11-13 18:35:23,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:35:23,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 18:35:23,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:23,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 18:35:23,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:35:23,720 INFO L87 Difference]: Start difference. First operand 3449 states and 4495 transitions. Second operand has 16 states, 16 states have (on average 16.5) internal successors, (264), 14 states have internal predecessors, (264), 6 states have call successors, (43), 4 states have call predecessors, (43), 7 states have return successors, (42), 8 states have call predecessors, (42), 6 states have call successors, (42) [2021-11-13 18:35:32,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:32,816 INFO L93 Difference]: Finished difference Result 17499 states and 23924 transitions. [2021-11-13 18:35:32,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-11-13 18:35:32,817 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 16.5) internal successors, (264), 14 states have internal predecessors, (264), 6 states have call successors, (43), 4 states have call predecessors, (43), 7 states have return successors, (42), 8 states have call predecessors, (42), 6 states have call successors, (42) Word has length 193 [2021-11-13 18:35:32,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:32,876 INFO L225 Difference]: With dead ends: 17499 [2021-11-13 18:35:32,877 INFO L226 Difference]: Without dead ends: 14346 [2021-11-13 18:35:32,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 474 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5045 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1835, Invalid=12207, Unknown=0, NotChecked=0, Total=14042 [2021-11-13 18:35:32,892 INFO L933 BasicCegarLoop]: 1822 mSDtfsCounter, 7160 mSDsluCounter, 13743 mSDsCounter, 0 mSdLazyCounter, 5454 mSolverCounterSat, 4426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4381.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7160 SdHoareTripleChecker+Valid, 15565 SdHoareTripleChecker+Invalid, 9880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 87.07ms SdHoareTripleChecker+Time, 4426 IncrementalHoareTripleChecker+Valid, 5454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5261.18ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:32,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7160 Valid, 15565 Invalid, 9880 Unknown, 0 Unchecked, 87.07ms Time], IncrementalHoareTripleChecker [4426 Valid, 5454 Invalid, 0 Unknown, 0 Unchecked, 5261.18ms Time] [2021-11-13 18:35:32,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14346 states. [2021-11-13 18:35:33,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14346 to 6315. [2021-11-13 18:35:33,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6315 states, 4771 states have (on average 1.3114651016558374) internal successors, (6257), 4809 states have internal predecessors, (6257), 992 states have call successors, (992), 551 states have call predecessors, (992), 551 states have return successors, (992), 954 states have call predecessors, (992), 992 states have call successors, (992) [2021-11-13 18:35:33,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6315 states to 6315 states and 8241 transitions. [2021-11-13 18:35:33,724 INFO L78 Accepts]: Start accepts. Automaton has 6315 states and 8241 transitions. Word has length 193 [2021-11-13 18:35:33,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:33,724 INFO L470 AbstractCegarLoop]: Abstraction has 6315 states and 8241 transitions. [2021-11-13 18:35:33,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 16.5) internal successors, (264), 14 states have internal predecessors, (264), 6 states have call successors, (43), 4 states have call predecessors, (43), 7 states have return successors, (42), 8 states have call predecessors, (42), 6 states have call successors, (42) [2021-11-13 18:35:33,725 INFO L276 IsEmpty]: Start isEmpty. Operand 6315 states and 8241 transitions. [2021-11-13 18:35:33,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-13 18:35:33,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:33,739 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:33,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:35:33,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-13 18:35:33,964 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:33,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:33,965 INFO L85 PathProgramCache]: Analyzing trace with hash -579946063, now seen corresponding path program 1 times [2021-11-13 18:35:33,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:33,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090367500] [2021-11-13 18:35:33,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:33,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:33,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:34,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:34,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:34,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:35:34,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:34,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 18:35:34,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:34,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:35:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:34,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-13 18:35:34,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:34,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-13 18:35:34,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:34,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-13 18:35:34,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:34,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-13 18:35:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:34,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-13 18:35:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:34,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-11-13 18:35:34,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:34,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-11-13 18:35:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:34,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-13 18:35:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:34,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-11-13 18:35:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:34,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-11-13 18:35:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:34,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-11-13 18:35:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-13 18:35:34,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:34,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090367500] [2021-11-13 18:35:34,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090367500] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:34,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:34,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:35:34,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446037630] [2021-11-13 18:35:34,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:34,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:35:34,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:34,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:35:34,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:35:34,111 INFO L87 Difference]: Start difference. First operand 6315 states and 8241 transitions. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:35:36,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:36,104 INFO L93 Difference]: Finished difference Result 21323 states and 28571 transitions. [2021-11-13 18:35:36,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:35:36,104 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 195 [2021-11-13 18:35:36,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:36,167 INFO L225 Difference]: With dead ends: 21323 [2021-11-13 18:35:36,167 INFO L226 Difference]: Without dead ends: 15366 [2021-11-13 18:35:36,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:35:36,185 INFO L933 BasicCegarLoop]: 572 mSDtfsCounter, 811 mSDsluCounter, 2510 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 181.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 3082 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.56ms SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 222.81ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:36,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [830 Valid, 3082 Invalid, 377 Unknown, 0 Unchecked, 8.56ms Time], IncrementalHoareTripleChecker [102 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 222.81ms Time] [2021-11-13 18:35:36,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15366 states. [2021-11-13 18:35:37,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15366 to 8157. [2021-11-13 18:35:37,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8157 states, 6101 states have (on average 1.3088018357646287) internal successors, (7985), 6152 states have internal predecessors, (7985), 1335 states have call successors, (1335), 720 states have call predecessors, (1335), 720 states have return successors, (1335), 1284 states have call predecessors, (1335), 1335 states have call successors, (1335) [2021-11-13 18:35:37,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8157 states to 8157 states and 10655 transitions. [2021-11-13 18:35:37,147 INFO L78 Accepts]: Start accepts. Automaton has 8157 states and 10655 transitions. Word has length 195 [2021-11-13 18:35:37,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:37,148 INFO L470 AbstractCegarLoop]: Abstraction has 8157 states and 10655 transitions. [2021-11-13 18:35:37,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:35:37,149 INFO L276 IsEmpty]: Start isEmpty. Operand 8157 states and 10655 transitions. [2021-11-13 18:35:37,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-13 18:35:37,167 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:37,167 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:37,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-13 18:35:37,167 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:37,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:37,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1014240118, now seen corresponding path program 1 times [2021-11-13 18:35:37,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:37,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205964737] [2021-11-13 18:35:37,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:37,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:37,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:37,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:37,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:35:37,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:37,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 18:35:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:37,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:35:37,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:37,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-13 18:35:37,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:37,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-13 18:35:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:37,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-13 18:35:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:37,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-13 18:35:37,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:37,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-13 18:35:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:37,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-11-13 18:35:37,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:37,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-11-13 18:35:37,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:37,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-11-13 18:35:37,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:37,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-11-13 18:35:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:37,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-11-13 18:35:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:37,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2021-11-13 18:35:37,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-13 18:35:37,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:37,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205964737] [2021-11-13 18:35:37,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205964737] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:35:37,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754162657] [2021-11-13 18:35:37,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:37,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:35:37,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:35:37,364 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:35:37,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:35:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:37,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 18:35:37,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:35:37,955 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 49 proven. 6 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 18:35:37,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:35:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-13 18:35:38,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754162657] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:35:38,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:35:38,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 7] total 14 [2021-11-13 18:35:38,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334473151] [2021-11-13 18:35:38,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:38,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:35:38,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:38,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:35:38,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:35:38,335 INFO L87 Difference]: Start difference. First operand 8157 states and 10655 transitions. Second operand has 5 states, 4 states have (on average 28.5) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-13 18:35:38,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:38,903 INFO L93 Difference]: Finished difference Result 13437 states and 17606 transitions. [2021-11-13 18:35:38,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:35:38,904 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 28.5) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 3 states have call successors, (14) Word has length 197 [2021-11-13 18:35:38,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:38,925 INFO L225 Difference]: With dead ends: 13437 [2021-11-13 18:35:38,926 INFO L226 Difference]: Without dead ends: 5486 [2021-11-13 18:35:38,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:35:38,939 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 2 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.11ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.95ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:38,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1156 Invalid, 18 Unknown, 0 Unchecked, 2.11ms Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 11.95ms Time] [2021-11-13 18:35:38,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5486 states. [2021-11-13 18:35:39,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5486 to 5486. [2021-11-13 18:35:39,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5486 states, 4104 states have (on average 1.3082358674463939) internal successors, (5369), 4138 states have internal predecessors, (5369), 901 states have call successors, (901), 480 states have call predecessors, (901), 480 states have return successors, (901), 867 states have call predecessors, (901), 901 states have call successors, (901) [2021-11-13 18:35:39,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5486 states to 5486 states and 7171 transitions. [2021-11-13 18:35:39,561 INFO L78 Accepts]: Start accepts. Automaton has 5486 states and 7171 transitions. Word has length 197 [2021-11-13 18:35:39,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:39,562 INFO L470 AbstractCegarLoop]: Abstraction has 5486 states and 7171 transitions. [2021-11-13 18:35:39,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 28.5) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-13 18:35:39,562 INFO L276 IsEmpty]: Start isEmpty. Operand 5486 states and 7171 transitions. [2021-11-13 18:35:39,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-13 18:35:39,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:39,575 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:39,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:35:39,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:35:39,800 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:39,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:39,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1806123049, now seen corresponding path program 1 times [2021-11-13 18:35:39,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:39,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250805858] [2021-11-13 18:35:39,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:39,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:39,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:39,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:40,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:35:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:40,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 18:35:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:40,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:35:40,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:40,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-13 18:35:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:40,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-13 18:35:40,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:40,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-13 18:35:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:40,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-13 18:35:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:40,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-13 18:35:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:40,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:35:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:40,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-11-13 18:35:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:40,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-11-13 18:35:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:40,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-11-13 18:35:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:40,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-11-13 18:35:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:40,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2021-11-13 18:35:40,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-13 18:35:40,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:40,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250805858] [2021-11-13 18:35:40,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250805858] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:35:40,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291833032] [2021-11-13 18:35:40,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:40,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:35:40,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:35:40,059 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:35:40,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:35:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:40,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 18:35:40,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:35:41,194 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 71 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:35:41,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:35:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-13 18:35:41,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291833032] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:35:41,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:35:41,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 24 [2021-11-13 18:35:41,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496305718] [2021-11-13 18:35:41,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:35:41,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-13 18:35:41,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:41,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-13 18:35:41,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-11-13 18:35:41,845 INFO L87 Difference]: Start difference. First operand 5486 states and 7171 transitions. Second operand has 24 states, 24 states have (on average 14.25) internal successors, (342), 24 states have internal predecessors, (342), 9 states have call successors, (41), 5 states have call predecessors, (41), 5 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2021-11-13 18:35:57,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:57,174 INFO L93 Difference]: Finished difference Result 27275 states and 38239 transitions. [2021-11-13 18:35:57,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2021-11-13 18:35:57,175 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 14.25) internal successors, (342), 24 states have internal predecessors, (342), 9 states have call successors, (41), 5 states have call predecessors, (41), 5 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) Word has length 197 [2021-11-13 18:35:57,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:57,252 INFO L225 Difference]: With dead ends: 27275 [2021-11-13 18:35:57,252 INFO L226 Difference]: Without dead ends: 22073 [2021-11-13 18:35:57,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 415 SyntacticMatches, 1 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20333 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5256, Invalid=44696, Unknown=0, NotChecked=0, Total=49952 [2021-11-13 18:35:57,282 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 8105 mSDsluCounter, 7962 mSDsCounter, 0 mSdLazyCounter, 11761 mSolverCounterSat, 3720 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6175.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8105 SdHoareTripleChecker+Valid, 8667 SdHoareTripleChecker+Invalid, 15481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 74.09ms SdHoareTripleChecker+Time, 3720 IncrementalHoareTripleChecker+Valid, 11761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7331.16ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:57,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8105 Valid, 8667 Invalid, 15481 Unknown, 0 Unchecked, 74.09ms Time], IncrementalHoareTripleChecker [3720 Valid, 11761 Invalid, 0 Unknown, 0 Unchecked, 7331.16ms Time] [2021-11-13 18:35:57,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22073 states. [2021-11-13 18:35:58,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22073 to 11267. [2021-11-13 18:35:58,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11267 states, 8498 states have (on average 1.3067780654271592) internal successors, (11105), 8564 states have internal predecessors, (11105), 1785 states have call successors, (1785), 983 states have call predecessors, (1785), 983 states have return successors, (1785), 1719 states have call predecessors, (1785), 1785 states have call successors, (1785) [2021-11-13 18:35:58,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11267 states to 11267 states and 14675 transitions. [2021-11-13 18:35:58,841 INFO L78 Accepts]: Start accepts. Automaton has 11267 states and 14675 transitions. Word has length 197 [2021-11-13 18:35:58,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:58,842 INFO L470 AbstractCegarLoop]: Abstraction has 11267 states and 14675 transitions. [2021-11-13 18:35:58,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.25) internal successors, (342), 24 states have internal predecessors, (342), 9 states have call successors, (41), 5 states have call predecessors, (41), 5 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2021-11-13 18:35:58,842 INFO L276 IsEmpty]: Start isEmpty. Operand 11267 states and 14675 transitions. [2021-11-13 18:35:58,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-13 18:35:58,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:58,869 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:58,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:35:59,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-13 18:35:59,084 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:59,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:59,085 INFO L85 PathProgramCache]: Analyzing trace with hash 2096530114, now seen corresponding path program 1 times [2021-11-13 18:35:59,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:59,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163050642] [2021-11-13 18:35:59,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:59,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:59,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:35:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:59,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:35:59,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:59,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 18:35:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:59,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:35:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:59,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-13 18:35:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:59,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-13 18:35:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:59,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-13 18:35:59,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:59,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-13 18:35:59,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:59,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-13 18:35:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:59,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:35:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:59,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-11-13 18:35:59,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:59,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-11-13 18:35:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:59,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-11-13 18:35:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:59,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-11-13 18:35:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:59,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2021-11-13 18:35:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-13 18:35:59,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:59,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163050642] [2021-11-13 18:35:59,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163050642] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:59,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:59,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:35:59,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772622076] [2021-11-13 18:35:59,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:59,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:35:59,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:59,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:35:59,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:35:59,250 INFO L87 Difference]: Start difference. First operand 11267 states and 14675 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 18:36:00,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:36:00,315 INFO L93 Difference]: Finished difference Result 21517 states and 28117 transitions. [2021-11-13 18:36:00,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:36:00,316 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 197 [2021-11-13 18:36:00,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:36:00,358 INFO L225 Difference]: With dead ends: 21517 [2021-11-13 18:36:00,359 INFO L226 Difference]: Without dead ends: 10517 [2021-11-13 18:36:00,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:36:00,375 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 451 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.35ms SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 135.37ms IncrementalHoareTripleChecker+Time [2021-11-13 18:36:00,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 440 Invalid, 218 Unknown, 0 Unchecked, 2.35ms Time], IncrementalHoareTripleChecker [60 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 135.37ms Time] [2021-11-13 18:36:00,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10517 states. [2021-11-13 18:36:01,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10517 to 10517. [2021-11-13 18:36:01,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10517 states, 7940 states have (on average 1.3086901763224181) internal successors, (10391), 8002 states have internal predecessors, (10391), 1663 states have call successors, (1663), 913 states have call predecessors, (1663), 913 states have return successors, (1663), 1601 states have call predecessors, (1663), 1663 states have call successors, (1663) [2021-11-13 18:36:01,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10517 states to 10517 states and 13717 transitions. [2021-11-13 18:36:01,512 INFO L78 Accepts]: Start accepts. Automaton has 10517 states and 13717 transitions. Word has length 197 [2021-11-13 18:36:01,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:36:01,513 INFO L470 AbstractCegarLoop]: Abstraction has 10517 states and 13717 transitions. [2021-11-13 18:36:01,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 18:36:01,513 INFO L276 IsEmpty]: Start isEmpty. Operand 10517 states and 13717 transitions. [2021-11-13 18:36:01,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-13 18:36:01,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:36:01,536 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:36:01,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-13 18:36:01,536 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:36:01,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:36:01,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1193102570, now seen corresponding path program 1 times [2021-11-13 18:36:01,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:36:01,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257458950] [2021-11-13 18:36:01,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:36:01,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:36:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:01,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:36:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:01,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:36:01,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:01,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 18:36:01,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:01,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:36:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:01,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-13 18:36:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:01,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-13 18:36:01,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:01,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-13 18:36:01,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:01,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-13 18:36:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:01,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-13 18:36:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:01,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:36:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:01,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-11-13 18:36:01,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:01,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-13 18:36:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:01,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-11-13 18:36:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:01,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-11-13 18:36:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:01,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-11-13 18:36:01,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:01,777 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 29 proven. 19 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-13 18:36:01,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:36:01,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257458950] [2021-11-13 18:36:01,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257458950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:36:01,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630547322] [2021-11-13 18:36:01,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:36:01,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:36:01,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:36:01,779 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:36:01,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:36:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:01,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:36:01,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:36:02,413 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 66 proven. 4 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 18:36:02,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:36:02,820 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 18:36:02,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630547322] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:36:02,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:36:02,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2021-11-13 18:36:02,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099827066] [2021-11-13 18:36:02,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:36:02,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 18:36:02,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:36:02,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 18:36:02,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:36:02,822 INFO L87 Difference]: Start difference. First operand 10517 states and 13717 transitions. Second operand has 17 states, 17 states have (on average 15.117647058823529) internal successors, (257), 16 states have internal predecessors, (257), 6 states have call successors, (37), 4 states have call predecessors, (37), 6 states have return successors, (37), 7 states have call predecessors, (37), 6 states have call successors, (37) [2021-11-13 18:36:10,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:36:10,375 INFO L93 Difference]: Finished difference Result 32482 states and 44899 transitions. [2021-11-13 18:36:10,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-13 18:36:10,375 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 15.117647058823529) internal successors, (257), 16 states have internal predecessors, (257), 6 states have call successors, (37), 4 states have call predecessors, (37), 6 states have return successors, (37), 7 states have call predecessors, (37), 6 states have call successors, (37) Word has length 198 [2021-11-13 18:36:10,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:36:10,449 INFO L225 Difference]: With dead ends: 32482 [2021-11-13 18:36:10,449 INFO L226 Difference]: Without dead ends: 22271 [2021-11-13 18:36:10,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2052 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=886, Invalid=5594, Unknown=0, NotChecked=0, Total=6480 [2021-11-13 18:36:10,468 INFO L933 BasicCegarLoop]: 638 mSDtfsCounter, 3038 mSDsluCounter, 6866 mSDsCounter, 0 mSdLazyCounter, 5774 mSolverCounterSat, 1476 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2891.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3038 SdHoareTripleChecker+Valid, 7504 SdHoareTripleChecker+Invalid, 7250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 43.32ms SdHoareTripleChecker+Time, 1476 IncrementalHoareTripleChecker+Valid, 5774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3443.53ms IncrementalHoareTripleChecker+Time [2021-11-13 18:36:10,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3038 Valid, 7504 Invalid, 7250 Unknown, 0 Unchecked, 43.32ms Time], IncrementalHoareTripleChecker [1476 Valid, 5774 Invalid, 0 Unknown, 0 Unchecked, 3443.53ms Time] [2021-11-13 18:36:10,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22271 states. [2021-11-13 18:36:12,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22271 to 11861. [2021-11-13 18:36:12,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11861 states, 8964 states have (on average 1.3042168674698795) internal successors, (11691), 9034 states have internal predecessors, (11691), 1863 states have call successors, (1863), 1033 states have call predecessors, (1863), 1033 states have return successors, (1863), 1793 states have call predecessors, (1863), 1863 states have call successors, (1863) [2021-11-13 18:36:12,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11861 states to 11861 states and 15417 transitions. [2021-11-13 18:36:12,357 INFO L78 Accepts]: Start accepts. Automaton has 11861 states and 15417 transitions. Word has length 198 [2021-11-13 18:36:12,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:36:12,357 INFO L470 AbstractCegarLoop]: Abstraction has 11861 states and 15417 transitions. [2021-11-13 18:36:12,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.117647058823529) internal successors, (257), 16 states have internal predecessors, (257), 6 states have call successors, (37), 4 states have call predecessors, (37), 6 states have return successors, (37), 7 states have call predecessors, (37), 6 states have call successors, (37) [2021-11-13 18:36:12,358 INFO L276 IsEmpty]: Start isEmpty. Operand 11861 states and 15417 transitions. [2021-11-13 18:36:12,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-13 18:36:12,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:36:12,384 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:36:12,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:36:12,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-13 18:36:12,604 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:36:12,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:36:12,605 INFO L85 PathProgramCache]: Analyzing trace with hash -679576872, now seen corresponding path program 1 times [2021-11-13 18:36:12,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:36:12,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600218763] [2021-11-13 18:36:12,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:36:12,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:36:12,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:12,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:36:12,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:12,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:36:12,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:12,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 18:36:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:12,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:36:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:12,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-13 18:36:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:12,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-13 18:36:12,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:12,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-13 18:36:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:12,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-13 18:36:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:12,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-13 18:36:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:12,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-13 18:36:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:12,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-13 18:36:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:12,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-11-13 18:36:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:12,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-11-13 18:36:12,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:12,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-11-13 18:36:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:12,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-11-13 18:36:12,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:12,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-11-13 18:36:12,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:12,712 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 18:36:12,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:36:12,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600218763] [2021-11-13 18:36:12,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600218763] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:36:12,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:36:12,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:36:12,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893581511] [2021-11-13 18:36:12,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:36:12,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:36:12,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:36:12,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:36:12,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:36:12,715 INFO L87 Difference]: Start difference. First operand 11861 states and 15417 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 18:36:13,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:36:13,820 INFO L93 Difference]: Finished difference Result 22311 states and 29108 transitions. [2021-11-13 18:36:13,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:36:13,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 206 [2021-11-13 18:36:13,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:36:13,855 INFO L225 Difference]: With dead ends: 22311 [2021-11-13 18:36:13,856 INFO L226 Difference]: Without dead ends: 10719 [2021-11-13 18:36:13,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:36:13,880 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 234 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 86.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.87ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 108.90ms IncrementalHoareTripleChecker+Time [2021-11-13 18:36:13,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 454 Invalid, 146 Unknown, 0 Unchecked, 1.87ms Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 108.90ms Time] [2021-11-13 18:36:13,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10719 states. [2021-11-13 18:36:15,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10719 to 10687. [2021-11-13 18:36:15,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10687 states, 8106 states have (on average 1.3039723661485318) internal successors, (10570), 8168 states have internal predecessors, (10570), 1665 states have call successors, (1665), 915 states have call predecessors, (1665), 915 states have return successors, (1665), 1603 states have call predecessors, (1665), 1665 states have call successors, (1665) [2021-11-13 18:36:15,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10687 states to 10687 states and 13900 transitions. [2021-11-13 18:36:15,164 INFO L78 Accepts]: Start accepts. Automaton has 10687 states and 13900 transitions. Word has length 206 [2021-11-13 18:36:15,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:36:15,164 INFO L470 AbstractCegarLoop]: Abstraction has 10687 states and 13900 transitions. [2021-11-13 18:36:15,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 18:36:15,164 INFO L276 IsEmpty]: Start isEmpty. Operand 10687 states and 13900 transitions. [2021-11-13 18:36:15,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-13 18:36:15,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:36:15,178 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:36:15,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-13 18:36:15,178 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:36:15,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:36:15,179 INFO L85 PathProgramCache]: Analyzing trace with hash -999010550, now seen corresponding path program 1 times [2021-11-13 18:36:15,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:36:15,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680506760] [2021-11-13 18:36:15,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:36:15,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:36:15,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:15,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:36:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:15,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:36:15,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:15,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-13 18:36:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:15,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 18:36:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:15,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:36:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:15,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-13 18:36:15,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:15,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-13 18:36:15,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:15,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-13 18:36:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:15,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-13 18:36:15,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:15,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-11-13 18:36:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:15,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-11-13 18:36:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:15,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-11-13 18:36:15,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:15,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-11-13 18:36:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:15,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-11-13 18:36:15,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:15,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-11-13 18:36:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:15,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-11-13 18:36:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-13 18:36:15,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:36:15,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680506760] [2021-11-13 18:36:15,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680506760] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:36:15,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931189714] [2021-11-13 18:36:15,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:36:15,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:36:15,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:36:15,344 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:36:15,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:36:15,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:15,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:36:15,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:36:16,062 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 8 proven. 115 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 18:36:16,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:36:16,497 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-13 18:36:16,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931189714] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:36:16,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:36:16,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2021-11-13 18:36:16,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930586485] [2021-11-13 18:36:16,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:36:16,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:36:16,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:36:16,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:36:16,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:36:16,500 INFO L87 Difference]: Start difference. First operand 10687 states and 13900 transitions. Second operand has 10 states, 10 states have (on average 18.7) internal successors, (187), 9 states have internal predecessors, (187), 4 states have call successors, (34), 5 states have call predecessors, (34), 7 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-13 18:36:19,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:36:19,065 INFO L93 Difference]: Finished difference Result 33496 states and 43750 transitions. [2021-11-13 18:36:19,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 18:36:19,065 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.7) internal successors, (187), 9 states have internal predecessors, (187), 4 states have call successors, (34), 5 states have call predecessors, (34), 7 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) Word has length 207 [2021-11-13 18:36:19,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:36:19,117 INFO L225 Difference]: With dead ends: 33496 [2021-11-13 18:36:19,117 INFO L226 Difference]: Without dead ends: 23244 [2021-11-13 18:36:19,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:36:19,141 INFO L933 BasicCegarLoop]: 402 mSDtfsCounter, 779 mSDsluCounter, 2218 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 2620 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.19ms SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 125.06ms IncrementalHoareTripleChecker+Time [2021-11-13 18:36:19,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [784 Valid, 2620 Invalid, 198 Unknown, 0 Unchecked, 6.19ms Time], IncrementalHoareTripleChecker [52 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 125.06ms Time] [2021-11-13 18:36:19,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23244 states. [2021-11-13 18:36:20,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23244 to 16693. [2021-11-13 18:36:20,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16693 states, 12776 states have (on average 1.2888227927363807) internal successors, (16466), 12891 states have internal predecessors, (16466), 2494 states have call successors, (2494), 1422 states have call predecessors, (2494), 1422 states have return successors, (2494), 2379 states have call predecessors, (2494), 2494 states have call successors, (2494) [2021-11-13 18:36:21,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16693 states to 16693 states and 21454 transitions. [2021-11-13 18:36:21,022 INFO L78 Accepts]: Start accepts. Automaton has 16693 states and 21454 transitions. Word has length 207 [2021-11-13 18:36:21,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:36:21,022 INFO L470 AbstractCegarLoop]: Abstraction has 16693 states and 21454 transitions. [2021-11-13 18:36:21,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.7) internal successors, (187), 9 states have internal predecessors, (187), 4 states have call successors, (34), 5 states have call predecessors, (34), 7 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-13 18:36:21,023 INFO L276 IsEmpty]: Start isEmpty. Operand 16693 states and 21454 transitions. [2021-11-13 18:36:21,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-13 18:36:21,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:36:21,032 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:36:21,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:36:21,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:36:21,233 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:36:21,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:36:21,233 INFO L85 PathProgramCache]: Analyzing trace with hash 261492107, now seen corresponding path program 1 times [2021-11-13 18:36:21,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:36:21,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664845226] [2021-11-13 18:36:21,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:36:21,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:36:21,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:21,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:36:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:21,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:36:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:21,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 18:36:21,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:21,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:36:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:21,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-13 18:36:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:21,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-13 18:36:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:21,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-13 18:36:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:21,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-13 18:36:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:21,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-13 18:36:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:21,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-13 18:36:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:21,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-11-13 18:36:21,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:21,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-11-13 18:36:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:21,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-11-13 18:36:21,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:21,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-11-13 18:36:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:21,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-11-13 18:36:21,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:21,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2021-11-13 18:36:21,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:21,431 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-13 18:36:21,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:36:21,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664845226] [2021-11-13 18:36:21,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664845226] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:36:21,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179314355] [2021-11-13 18:36:21,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:36:21,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:36:21,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:36:21,433 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:36:21,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 18:36:21,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:21,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 18:36:21,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:36:22,174 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 67 proven. 4 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 18:36:22,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:36:22,639 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-13 18:36:22,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179314355] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:36:22,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:36:22,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2021-11-13 18:36:22,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983046891] [2021-11-13 18:36:22,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:36:22,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:36:22,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:36:22,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:36:22,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:36:22,642 INFO L87 Difference]: Start difference. First operand 16693 states and 21454 transitions. Second operand has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 8 states have internal predecessors, (182), 3 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-13 18:36:25,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:36:25,256 INFO L93 Difference]: Finished difference Result 38901 states and 51671 transitions. [2021-11-13 18:36:25,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:36:25,257 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 8 states have internal predecessors, (182), 3 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 207 [2021-11-13 18:36:25,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:36:25,305 INFO L225 Difference]: With dead ends: 38901 [2021-11-13 18:36:25,305 INFO L226 Difference]: Without dead ends: 22514 [2021-11-13 18:36:25,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 443 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:36:25,321 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 281 mSDsluCounter, 2642 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 3066 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.31ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 139.90ms IncrementalHoareTripleChecker+Time [2021-11-13 18:36:25,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 3066 Invalid, 224 Unknown, 0 Unchecked, 5.31ms Time], IncrementalHoareTripleChecker [27 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 139.90ms Time] [2021-11-13 18:36:25,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22514 states. [2021-11-13 18:36:27,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22514 to 16693. [2021-11-13 18:36:27,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16693 states, 12776 states have (on average 1.288431433938635) internal successors, (16461), 12891 states have internal predecessors, (16461), 2494 states have call successors, (2494), 1422 states have call predecessors, (2494), 1422 states have return successors, (2494), 2379 states have call predecessors, (2494), 2494 states have call successors, (2494) [2021-11-13 18:36:27,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16693 states to 16693 states and 21449 transitions. [2021-11-13 18:36:27,390 INFO L78 Accepts]: Start accepts. Automaton has 16693 states and 21449 transitions. Word has length 207 [2021-11-13 18:36:27,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:36:27,390 INFO L470 AbstractCegarLoop]: Abstraction has 16693 states and 21449 transitions. [2021-11-13 18:36:27,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 8 states have internal predecessors, (182), 3 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-13 18:36:27,391 INFO L276 IsEmpty]: Start isEmpty. Operand 16693 states and 21449 transitions. [2021-11-13 18:36:27,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-13 18:36:27,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:36:27,404 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:36:27,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:36:27,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-13 18:36:27,620 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:36:27,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:36:27,621 INFO L85 PathProgramCache]: Analyzing trace with hash -148674929, now seen corresponding path program 1 times [2021-11-13 18:36:27,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:36:27,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314741538] [2021-11-13 18:36:27,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:36:27,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:36:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:28,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:36:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:28,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:36:28,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:28,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 18:36:28,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:28,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:36:28,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:28,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-13 18:36:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:28,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-13 18:36:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:28,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-13 18:36:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:28,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-13 18:36:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:28,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-13 18:36:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:28,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-13 18:36:28,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:28,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-13 18:36:28,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:28,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-13 18:36:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:28,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-11-13 18:36:28,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:28,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-11-13 18:36:28,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:28,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-11-13 18:36:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:28,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-11-13 18:36:28,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:28,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2021-11-13 18:36:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:28,108 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 18:36:28,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:36:28,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314741538] [2021-11-13 18:36:28,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314741538] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:36:28,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195363094] [2021-11-13 18:36:28,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:36:28,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:36:28,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:36:28,111 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:36:28,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 18:36:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:28,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 18:36:28,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:36:29,933 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 68 proven. 27 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 18:36:29,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:36:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 18:36:31,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195363094] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:36:31,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:36:31,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 10] total 22 [2021-11-13 18:36:31,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457432051] [2021-11-13 18:36:31,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:36:31,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-13 18:36:31,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:36:31,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-13 18:36:31,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-11-13 18:36:31,477 INFO L87 Difference]: Start difference. First operand 16693 states and 21449 transitions. Second operand has 22 states, 22 states have (on average 16.818181818181817) internal successors, (370), 22 states have internal predecessors, (370), 10 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 10 states have call predecessors, (46), 10 states have call successors, (46) [2021-11-13 18:36:38,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:36:38,168 INFO L93 Difference]: Finished difference Result 39951 states and 53398 transitions. [2021-11-13 18:36:38,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-13 18:36:38,168 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 16.818181818181817) internal successors, (370), 22 states have internal predecessors, (370), 10 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 10 states have call predecessors, (46), 10 states have call successors, (46) Word has length 214 [2021-11-13 18:36:38,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:36:38,259 INFO L225 Difference]: With dead ends: 39951 [2021-11-13 18:36:38,259 INFO L226 Difference]: Without dead ends: 26669 [2021-11-13 18:36:38,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 450 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=643, Invalid=1907, Unknown=0, NotChecked=0, Total=2550 [2021-11-13 18:36:38,281 INFO L933 BasicCegarLoop]: 451 mSDtfsCounter, 4492 mSDsluCounter, 2504 mSDsCounter, 0 mSdLazyCounter, 2655 mSolverCounterSat, 1580 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2010.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4493 SdHoareTripleChecker+Valid, 2955 SdHoareTripleChecker+Invalid, 4235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.63ms SdHoareTripleChecker+Time, 1580 IncrementalHoareTripleChecker+Valid, 2655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2407.53ms IncrementalHoareTripleChecker+Time [2021-11-13 18:36:38,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4493 Valid, 2955 Invalid, 4235 Unknown, 0 Unchecked, 21.63ms Time], IncrementalHoareTripleChecker [1580 Valid, 2655 Invalid, 0 Unknown, 0 Unchecked, 2407.53ms Time] [2021-11-13 18:36:38,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26669 states. [2021-11-13 18:36:40,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26669 to 14063. [2021-11-13 18:36:40,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14063 states, 10668 states have (on average 1.2818710161229847) internal successors, (13675), 10769 states have internal predecessors, (13675), 2181 states have call successors, (2181), 1213 states have call predecessors, (2181), 1213 states have return successors, (2181), 2080 states have call predecessors, (2181), 2181 states have call successors, (2181) [2021-11-13 18:36:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14063 states to 14063 states and 18037 transitions. [2021-11-13 18:36:40,084 INFO L78 Accepts]: Start accepts. Automaton has 14063 states and 18037 transitions. Word has length 214 [2021-11-13 18:36:40,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:36:40,085 INFO L470 AbstractCegarLoop]: Abstraction has 14063 states and 18037 transitions. [2021-11-13 18:36:40,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 16.818181818181817) internal successors, (370), 22 states have internal predecessors, (370), 10 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 10 states have call predecessors, (46), 10 states have call successors, (46) [2021-11-13 18:36:40,085 INFO L276 IsEmpty]: Start isEmpty. Operand 14063 states and 18037 transitions. [2021-11-13 18:36:40,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-13 18:36:40,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:36:40,096 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:36:40,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:36:40,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-13 18:36:40,312 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:36:40,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:36:40,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1038689630, now seen corresponding path program 1 times [2021-11-13 18:36:40,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:36:40,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929701959] [2021-11-13 18:36:40,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:36:40,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:36:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:40,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:36:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:40,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:36:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:40,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 18:36:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:40,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:36:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:40,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-13 18:36:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:40,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-13 18:36:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:40,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-13 18:36:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:40,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-13 18:36:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:40,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-13 18:36:40,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:40,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-13 18:36:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:40,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-13 18:36:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:40,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-13 18:36:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:40,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 18:36:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:40,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-11-13 18:36:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:40,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-11-13 18:36:40,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:40,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2021-11-13 18:36:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:40,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2021-11-13 18:36:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 8 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 18:36:40,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:36:40,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929701959] [2021-11-13 18:36:40,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929701959] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:36:40,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740389520] [2021-11-13 18:36:40,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:36:40,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:36:40,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:36:40,520 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:36:40,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 18:36:40,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:40,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 18:36:40,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:36:41,121 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 80 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 18:36:41,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:36:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 8 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 18:36:41,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740389520] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:36:41,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:36:41,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 14 [2021-11-13 18:36:41,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575668837] [2021-11-13 18:36:41,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:36:41,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:36:41,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:36:41,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:36:41,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:36:41,800 INFO L87 Difference]: Start difference. First operand 14063 states and 18037 transitions. Second operand has 14 states, 14 states have (on average 18.285714285714285) internal successors, (256), 14 states have internal predecessors, (256), 6 states have call successors, (45), 4 states have call predecessors, (45), 4 states have return successors, (44), 6 states have call predecessors, (44), 6 states have call successors, (44) [2021-11-13 18:36:48,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:36:48,645 INFO L93 Difference]: Finished difference Result 43819 states and 59246 transitions. [2021-11-13 18:36:48,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-13 18:36:48,645 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 18.285714285714285) internal successors, (256), 14 states have internal predecessors, (256), 6 states have call successors, (45), 4 states have call predecessors, (45), 4 states have return successors, (44), 6 states have call predecessors, (44), 6 states have call successors, (44) Word has length 215 [2021-11-13 18:36:48,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:36:48,724 INFO L225 Difference]: With dead ends: 43819 [2021-11-13 18:36:48,725 INFO L226 Difference]: Without dead ends: 31403 [2021-11-13 18:36:48,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2124 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=952, Invalid=5054, Unknown=0, NotChecked=0, Total=6006 [2021-11-13 18:36:48,744 INFO L933 BasicCegarLoop]: 979 mSDtfsCounter, 2461 mSDsluCounter, 7132 mSDsCounter, 0 mSdLazyCounter, 1753 mSolverCounterSat, 807 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1076.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2561 SdHoareTripleChecker+Valid, 8111 SdHoareTripleChecker+Invalid, 2560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.04ms SdHoareTripleChecker+Time, 807 IncrementalHoareTripleChecker+Valid, 1753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1313.91ms IncrementalHoareTripleChecker+Time [2021-11-13 18:36:48,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2561 Valid, 8111 Invalid, 2560 Unknown, 0 Unchecked, 25.04ms Time], IncrementalHoareTripleChecker [807 Valid, 1753 Invalid, 0 Unknown, 0 Unchecked, 1313.91ms Time] [2021-11-13 18:36:48,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31403 states. [2021-11-13 18:36:51,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31403 to 17960. [2021-11-13 18:36:51,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17960 states, 13820 states have (on average 1.273082489146165) internal successors, (17594), 13939 states have internal predecessors, (17594), 2623 states have call successors, (2623), 1516 states have call predecessors, (2623), 1516 states have return successors, (2623), 2504 states have call predecessors, (2623), 2623 states have call successors, (2623) [2021-11-13 18:36:51,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17960 states to 17960 states and 22840 transitions. [2021-11-13 18:36:51,316 INFO L78 Accepts]: Start accepts. Automaton has 17960 states and 22840 transitions. Word has length 215 [2021-11-13 18:36:51,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:36:51,316 INFO L470 AbstractCegarLoop]: Abstraction has 17960 states and 22840 transitions. [2021-11-13 18:36:51,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.285714285714285) internal successors, (256), 14 states have internal predecessors, (256), 6 states have call successors, (45), 4 states have call predecessors, (45), 4 states have return successors, (44), 6 states have call predecessors, (44), 6 states have call successors, (44) [2021-11-13 18:36:51,317 INFO L276 IsEmpty]: Start isEmpty. Operand 17960 states and 22840 transitions. [2021-11-13 18:36:51,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-13 18:36:51,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:36:51,327 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:36:51,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:36:51,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-13 18:36:51,527 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:36:51,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:36:51,528 INFO L85 PathProgramCache]: Analyzing trace with hash -390096860, now seen corresponding path program 1 times [2021-11-13 18:36:51,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:36:51,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628694286] [2021-11-13 18:36:51,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:36:51,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:36:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:51,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:36:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:51,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:36:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:51,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 18:36:51,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:51,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:36:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:51,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-13 18:36:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:51,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-13 18:36:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:51,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-13 18:36:51,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:51,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-13 18:36:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:51,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-13 18:36:51,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:51,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-13 18:36:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:51,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-13 18:36:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:51,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-13 18:36:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:51,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 18:36:51,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:51,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-11-13 18:36:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:51,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-11-13 18:36:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:51,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2021-11-13 18:36:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:51,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2021-11-13 18:36:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:51,653 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-13 18:36:51,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:36:51,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628694286] [2021-11-13 18:36:51,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628694286] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:36:51,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:36:51,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:36:51,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628619443] [2021-11-13 18:36:51,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:36:51,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:36:51,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:36:51,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:36:51,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:36:51,656 INFO L87 Difference]: Start difference. First operand 17960 states and 22840 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 18:36:53,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:36:53,419 INFO L93 Difference]: Finished difference Result 30594 states and 39089 transitions. [2021-11-13 18:36:53,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:36:53,419 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 215 [2021-11-13 18:36:53,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:36:53,450 INFO L225 Difference]: With dead ends: 30594 [2021-11-13 18:36:53,450 INFO L226 Difference]: Without dead ends: 13641 [2021-11-13 18:36:53,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:36:53,470 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 238 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.14ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 122.40ms IncrementalHoareTripleChecker+Time [2021-11-13 18:36:53,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 486 Invalid, 157 Unknown, 0 Unchecked, 2.14ms Time], IncrementalHoareTripleChecker [3 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 122.40ms Time] [2021-11-13 18:36:53,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13641 states. [2021-11-13 18:36:55,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13641 to 13598. [2021-11-13 18:36:55,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13598 states, 10545 states have (on average 1.2751066856330013) internal successors, (13446), 10627 states have internal predecessors, (13446), 1931 states have call successors, (1931), 1121 states have call predecessors, (1931), 1121 states have return successors, (1931), 1849 states have call predecessors, (1931), 1931 states have call successors, (1931) [2021-11-13 18:36:55,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13598 states to 13598 states and 17308 transitions. [2021-11-13 18:36:55,047 INFO L78 Accepts]: Start accepts. Automaton has 13598 states and 17308 transitions. Word has length 215 [2021-11-13 18:36:55,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:36:55,048 INFO L470 AbstractCegarLoop]: Abstraction has 13598 states and 17308 transitions. [2021-11-13 18:36:55,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 18:36:55,048 INFO L276 IsEmpty]: Start isEmpty. Operand 13598 states and 17308 transitions. [2021-11-13 18:36:55,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-13 18:36:55,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:36:55,054 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:36:55,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-13 18:36:55,055 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:36:55,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:36:55,055 INFO L85 PathProgramCache]: Analyzing trace with hash -2065979923, now seen corresponding path program 1 times [2021-11-13 18:36:55,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:36:55,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259629861] [2021-11-13 18:36:55,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:36:55,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:36:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:55,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:36:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:55,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:36:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:55,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-13 18:36:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:55,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 18:36:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:55,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:36:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:55,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-13 18:36:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:55,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-13 18:36:55,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:55,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-13 18:36:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:55,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-13 18:36:55,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:55,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:36:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:55,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-11-13 18:36:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:55,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-11-13 18:36:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:55,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-11-13 18:36:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:55,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2021-11-13 18:36:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:55,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-11-13 18:36:55,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:55,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-11-13 18:36:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:55,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2021-11-13 18:36:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:55,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2021-11-13 18:36:55,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:36:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-13 18:36:55,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:36:55,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259629861] [2021-11-13 18:36:55,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259629861] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:36:55,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:36:55,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:36:55,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384277576] [2021-11-13 18:36:55,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:36:55,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:36:55,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:36:55,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:36:55,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:36:55,263 INFO L87 Difference]: Start difference. First operand 13598 states and 17308 transitions. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 6 states have internal predecessors, (114), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-13 18:36:58,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:36:58,851 INFO L93 Difference]: Finished difference Result 35311 states and 45954 transitions. [2021-11-13 18:36:58,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:36:58,852 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 6 states have internal predecessors, (114), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 216 [2021-11-13 18:36:58,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:36:58,907 INFO L225 Difference]: With dead ends: 35311 [2021-11-13 18:36:58,907 INFO L226 Difference]: Without dead ends: 25623 [2021-11-13 18:36:58,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:36:58,921 INFO L933 BasicCegarLoop]: 583 mSDtfsCounter, 611 mSDsluCounter, 2416 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 150.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 2999 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.71ms SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 187.94ms IncrementalHoareTripleChecker+Time [2021-11-13 18:36:58,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [626 Valid, 2999 Invalid, 336 Unknown, 0 Unchecked, 6.71ms Time], IncrementalHoareTripleChecker [86 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 187.94ms Time] [2021-11-13 18:36:58,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25623 states. [2021-11-13 18:37:00,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25623 to 16793. [2021-11-13 18:37:00,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16793 states, 12863 states have (on average 1.2677446940838062) internal successors, (16307), 12977 states have internal predecessors, (16307), 2488 states have call successors, (2488), 1441 states have call predecessors, (2488), 1441 states have return successors, (2488), 2374 states have call predecessors, (2488), 2488 states have call successors, (2488) [2021-11-13 18:37:00,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16793 states to 16793 states and 21283 transitions. [2021-11-13 18:37:00,983 INFO L78 Accepts]: Start accepts. Automaton has 16793 states and 21283 transitions. Word has length 216 [2021-11-13 18:37:00,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:37:00,984 INFO L470 AbstractCegarLoop]: Abstraction has 16793 states and 21283 transitions. [2021-11-13 18:37:00,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 6 states have internal predecessors, (114), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-13 18:37:00,984 INFO L276 IsEmpty]: Start isEmpty. Operand 16793 states and 21283 transitions. [2021-11-13 18:37:00,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-13 18:37:00,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:37:00,992 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:37:00,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-13 18:37:00,992 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:37:00,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:37:00,992 INFO L85 PathProgramCache]: Analyzing trace with hash 231937200, now seen corresponding path program 1 times [2021-11-13 18:37:00,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:37:00,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733746650] [2021-11-13 18:37:00,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:37:00,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:37:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:01,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:37:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:01,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:37:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:01,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-13 18:37:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:01,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 18:37:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:01,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:37:01,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:01,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-13 18:37:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:01,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-13 18:37:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:01,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-13 18:37:01,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:01,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-13 18:37:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:01,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:37:01,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:01,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-11-13 18:37:01,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:01,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-11-13 18:37:01,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:01,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-11-13 18:37:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:01,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-11-13 18:37:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:01,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-11-13 18:37:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:01,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-11-13 18:37:01,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:01,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2021-11-13 18:37:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:01,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2021-11-13 18:37:01,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:01,195 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-13 18:37:01,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:37:01,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733746650] [2021-11-13 18:37:01,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733746650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:37:01,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631926977] [2021-11-13 18:37:01,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:37:01,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:37:01,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:37:01,198 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:37:01,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 18:37:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:01,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 18:37:01,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:37:01,854 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 133 proven. 23 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 18:37:01,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:37:02,356 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-13 18:37:02,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631926977] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:37:02,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:37:02,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 20 [2021-11-13 18:37:02,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172084834] [2021-11-13 18:37:02,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:37:02,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 18:37:02,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:37:02,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 18:37:02,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:37:02,360 INFO L87 Difference]: Start difference. First operand 16793 states and 21283 transitions. Second operand has 20 states, 20 states have (on average 14.7) internal successors, (294), 17 states have internal predecessors, (294), 7 states have call successors, (46), 4 states have call predecessors, (46), 8 states have return successors, (46), 10 states have call predecessors, (46), 7 states have call successors, (46) [2021-11-13 18:37:24,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:37:24,598 INFO L93 Difference]: Finished difference Result 89987 states and 122193 transitions. [2021-11-13 18:37:24,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-11-13 18:37:24,599 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 14.7) internal successors, (294), 17 states have internal predecessors, (294), 7 states have call successors, (46), 4 states have call predecessors, (46), 8 states have return successors, (46), 10 states have call predecessors, (46), 7 states have call successors, (46) Word has length 217 [2021-11-13 18:37:24,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:37:24,820 INFO L225 Difference]: With dead ends: 89987 [2021-11-13 18:37:24,820 INFO L226 Difference]: Without dead ends: 71162 [2021-11-13 18:37:24,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 526 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9621 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3260, Invalid=22180, Unknown=0, NotChecked=0, Total=25440 [2021-11-13 18:37:24,873 INFO L933 BasicCegarLoop]: 960 mSDtfsCounter, 4701 mSDsluCounter, 10353 mSDsCounter, 0 mSdLazyCounter, 9319 mSolverCounterSat, 5256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6065.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4701 SdHoareTripleChecker+Valid, 11313 SdHoareTripleChecker+Invalid, 14575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 75.09ms SdHoareTripleChecker+Time, 5256 IncrementalHoareTripleChecker+Valid, 9319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7232.97ms IncrementalHoareTripleChecker+Time [2021-11-13 18:37:24,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4701 Valid, 11313 Invalid, 14575 Unknown, 0 Unchecked, 75.09ms Time], IncrementalHoareTripleChecker [5256 Valid, 9319 Invalid, 0 Unknown, 0 Unchecked, 7232.97ms Time] [2021-11-13 18:37:24,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71162 states. [2021-11-13 18:37:30,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71162 to 36205. [2021-11-13 18:37:30,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36205 states, 27317 states have (on average 1.2768605630193652) internal successors, (34880), 27578 states have internal predecessors, (34880), 5655 states have call successors, (5655), 3232 states have call predecessors, (5655), 3232 states have return successors, (5655), 5394 states have call predecessors, (5655), 5655 states have call successors, (5655) [2021-11-13 18:37:30,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36205 states to 36205 states and 46190 transitions. [2021-11-13 18:37:30,563 INFO L78 Accepts]: Start accepts. Automaton has 36205 states and 46190 transitions. Word has length 217 [2021-11-13 18:37:30,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:37:30,564 INFO L470 AbstractCegarLoop]: Abstraction has 36205 states and 46190 transitions. [2021-11-13 18:37:30,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 14.7) internal successors, (294), 17 states have internal predecessors, (294), 7 states have call successors, (46), 4 states have call predecessors, (46), 8 states have return successors, (46), 10 states have call predecessors, (46), 7 states have call successors, (46) [2021-11-13 18:37:30,564 INFO L276 IsEmpty]: Start isEmpty. Operand 36205 states and 46190 transitions. [2021-11-13 18:37:30,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-13 18:37:30,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:37:30,575 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:37:30,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:37:30,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:37:30,788 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:37:30,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:37:30,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1004193953, now seen corresponding path program 1 times [2021-11-13 18:37:30,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:37:30,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118137659] [2021-11-13 18:37:30,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:37:30,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:37:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:31,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:37:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:31,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:37:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:31,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-13 18:37:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:31,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 18:37:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:31,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:37:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:31,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-13 18:37:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:31,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-13 18:37:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:31,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-13 18:37:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:31,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-13 18:37:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:31,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:37:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:31,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-11-13 18:37:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:31,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-13 18:37:31,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:31,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-11-13 18:37:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:31,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-11-13 18:37:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:31,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-11-13 18:37:31,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:31,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-11-13 18:37:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:31,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2021-11-13 18:37:31,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:31,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2021-11-13 18:37:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-13 18:37:31,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:37:31,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118137659] [2021-11-13 18:37:31,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118137659] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:37:31,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083891097] [2021-11-13 18:37:31,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:37:31,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:37:31,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:37:31,076 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:37:31,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 18:37:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:31,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 18:37:31,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:37:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 114 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 18:37:31,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:37:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 49 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-13 18:37:32,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083891097] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:37:32,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:37:32,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2021-11-13 18:37:32,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561034982] [2021-11-13 18:37:32,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:37:32,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-13 18:37:32,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:37:32,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-13 18:37:32,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:37:32,295 INFO L87 Difference]: Start difference. First operand 36205 states and 46190 transitions. Second operand has 23 states, 23 states have (on average 13.043478260869565) internal successors, (300), 20 states have internal predecessors, (300), 7 states have call successors, (46), 4 states have call predecessors, (46), 8 states have return successors, (46), 10 states have call predecessors, (46), 7 states have call successors, (46) [2021-11-13 18:37:50,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:37:50,520 INFO L93 Difference]: Finished difference Result 84839 states and 113068 transitions. [2021-11-13 18:37:50,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-13 18:37:50,521 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 13.043478260869565) internal successors, (300), 20 states have internal predecessors, (300), 7 states have call successors, (46), 4 states have call predecessors, (46), 8 states have return successors, (46), 10 states have call predecessors, (46), 7 states have call successors, (46) Word has length 222 [2021-11-13 18:37:50,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:37:50,720 INFO L225 Difference]: With dead ends: 84839 [2021-11-13 18:37:50,721 INFO L226 Difference]: Without dead ends: 50814 [2021-11-13 18:37:50,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 518 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4267 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1380, Invalid=12192, Unknown=0, NotChecked=0, Total=13572 [2021-11-13 18:37:50,788 INFO L933 BasicCegarLoop]: 1261 mSDtfsCounter, 2961 mSDsluCounter, 19221 mSDsCounter, 0 mSdLazyCounter, 12407 mSolverCounterSat, 1903 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5762.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2961 SdHoareTripleChecker+Valid, 20482 SdHoareTripleChecker+Invalid, 14310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 80.43ms SdHoareTripleChecker+Time, 1903 IncrementalHoareTripleChecker+Valid, 12407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6965.27ms IncrementalHoareTripleChecker+Time [2021-11-13 18:37:50,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2961 Valid, 20482 Invalid, 14310 Unknown, 0 Unchecked, 80.43ms Time], IncrementalHoareTripleChecker [1903 Valid, 12407 Invalid, 0 Unknown, 0 Unchecked, 6965.27ms Time] [2021-11-13 18:37:50,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50814 states. [2021-11-13 18:37:55,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50814 to 27534. [2021-11-13 18:37:55,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27534 states, 20985 states have (on average 1.2629973790802955) internal successors, (26504), 21170 states have internal predecessors, (26504), 4132 states have call successors, (4132), 2417 states have call predecessors, (4132), 2416 states have return successors, (4113), 3946 states have call predecessors, (4113), 4113 states have call successors, (4113) [2021-11-13 18:37:56,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27534 states to 27534 states and 34749 transitions. [2021-11-13 18:37:56,012 INFO L78 Accepts]: Start accepts. Automaton has 27534 states and 34749 transitions. Word has length 222 [2021-11-13 18:37:56,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:37:56,012 INFO L470 AbstractCegarLoop]: Abstraction has 27534 states and 34749 transitions. [2021-11-13 18:37:56,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 13.043478260869565) internal successors, (300), 20 states have internal predecessors, (300), 7 states have call successors, (46), 4 states have call predecessors, (46), 8 states have return successors, (46), 10 states have call predecessors, (46), 7 states have call successors, (46) [2021-11-13 18:37:56,013 INFO L276 IsEmpty]: Start isEmpty. Operand 27534 states and 34749 transitions. [2021-11-13 18:37:56,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-13 18:37:56,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:37:56,025 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:37:56,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:37:56,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-13 18:37:56,241 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:37:56,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:37:56,241 INFO L85 PathProgramCache]: Analyzing trace with hash 267578377, now seen corresponding path program 1 times [2021-11-13 18:37:56,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:37:56,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508297310] [2021-11-13 18:37:56,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:37:56,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:37:56,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:56,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:37:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:56,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:37:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:56,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 18:37:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:56,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:37:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:56,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-13 18:37:56,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:56,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-13 18:37:56,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:56,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-13 18:37:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:56,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-13 18:37:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:56,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-13 18:37:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:56,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-13 18:37:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:56,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-13 18:37:56,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:56,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-13 18:37:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:56,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 18:37:56,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:56,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-11-13 18:37:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:56,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-11-13 18:37:56,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:56,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2021-11-13 18:37:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:56,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2021-11-13 18:37:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:56,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2021-11-13 18:37:56,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-13 18:37:56,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:37:56,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508297310] [2021-11-13 18:37:56,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508297310] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:37:56,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:37:56,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:37:56,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814143297] [2021-11-13 18:37:56,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:37:56,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:37:56,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:37:56,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:37:56,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:37:56,476 INFO L87 Difference]: Start difference. First operand 27534 states and 34749 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-13 18:38:03,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:03,193 INFO L93 Difference]: Finished difference Result 58793 states and 76076 transitions. [2021-11-13 18:38:03,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:38:03,193 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 223 [2021-11-13 18:38:03,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:03,329 INFO L225 Difference]: With dead ends: 58793 [2021-11-13 18:38:03,329 INFO L226 Difference]: Without dead ends: 36619 [2021-11-13 18:38:03,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:38:03,369 INFO L933 BasicCegarLoop]: 612 mSDtfsCounter, 704 mSDsluCounter, 1981 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 302.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 2593 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.02ms SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 378.23ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:03,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [707 Valid, 2593 Invalid, 547 Unknown, 0 Unchecked, 8.02ms Time], IncrementalHoareTripleChecker [176 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 378.23ms Time] [2021-11-13 18:38:03,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36619 states. [2021-11-13 18:38:07,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36619 to 28186. [2021-11-13 18:38:07,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28186 states, 21445 states have (on average 1.2610398694334344) internal successors, (27043), 21636 states have internal predecessors, (27043), 4258 states have call successors, (4258), 2483 states have call predecessors, (4258), 2482 states have return successors, (4233), 4066 states have call predecessors, (4233), 4233 states have call successors, (4233) [2021-11-13 18:38:07,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28186 states to 28186 states and 35534 transitions. [2021-11-13 18:38:07,851 INFO L78 Accepts]: Start accepts. Automaton has 28186 states and 35534 transitions. Word has length 223 [2021-11-13 18:38:07,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:07,851 INFO L470 AbstractCegarLoop]: Abstraction has 28186 states and 35534 transitions. [2021-11-13 18:38:07,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-13 18:38:07,852 INFO L276 IsEmpty]: Start isEmpty. Operand 28186 states and 35534 transitions. [2021-11-13 18:38:07,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-13 18:38:07,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:07,858 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:38:07,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-11-13 18:38:07,858 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:07,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:07,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1055302569, now seen corresponding path program 1 times [2021-11-13 18:38:07,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:07,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957103531] [2021-11-13 18:38:07,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:07,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:07,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:07,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:38:07,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:07,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:38:07,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:07,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 18:38:07,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:08,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:38:08,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:08,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-13 18:38:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:08,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-13 18:38:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:08,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-13 18:38:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:08,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-13 18:38:08,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:08,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-13 18:38:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:08,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-13 18:38:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:08,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-13 18:38:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:08,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-13 18:38:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:08,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-11-13 18:38:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:08,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-11-13 18:38:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:08,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-11-13 18:38:08,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:08,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2021-11-13 18:38:08,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:08,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2021-11-13 18:38:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:08,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2021-11-13 18:38:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:08,047 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 18:38:08,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:08,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957103531] [2021-11-13 18:38:08,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957103531] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:38:08,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530639018] [2021-11-13 18:38:08,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:08,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:08,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:38:08,056 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:38:08,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-13 18:38:08,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:08,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 18:38:08,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:38:09,037 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 110 proven. 4 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 18:38:09,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:38:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 18:38:09,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530639018] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:38:09,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:38:09,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2021-11-13 18:38:09,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800212797] [2021-11-13 18:38:09,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:38:09,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 18:38:09,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:09,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 18:38:09,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:38:09,555 INFO L87 Difference]: Start difference. First operand 28186 states and 35534 transitions. Second operand has 19 states, 19 states have (on average 16.05263157894737) internal successors, (305), 19 states have internal predecessors, (305), 8 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 8 states have call predecessors, (46), 8 states have call successors, (46) [2021-11-13 18:38:25,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:25,636 INFO L93 Difference]: Finished difference Result 89350 states and 119724 transitions. [2021-11-13 18:38:25,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-13 18:38:25,636 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 16.05263157894737) internal successors, (305), 19 states have internal predecessors, (305), 8 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 8 states have call predecessors, (46), 8 states have call successors, (46) Word has length 224 [2021-11-13 18:38:25,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:25,845 INFO L225 Difference]: With dead ends: 89350 [2021-11-13 18:38:25,845 INFO L226 Difference]: Without dead ends: 63219 [2021-11-13 18:38:25,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 473 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=431, Invalid=1825, Unknown=0, NotChecked=0, Total=2256 [2021-11-13 18:38:25,888 INFO L933 BasicCegarLoop]: 695 mSDtfsCounter, 4482 mSDsluCounter, 4011 mSDsCounter, 0 mSdLazyCounter, 4869 mSolverCounterSat, 1312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2351.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4508 SdHoareTripleChecker+Valid, 4706 SdHoareTripleChecker+Invalid, 6181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.95ms SdHoareTripleChecker+Time, 1312 IncrementalHoareTripleChecker+Valid, 4869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2827.13ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:25,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4508 Valid, 4706 Invalid, 6181 Unknown, 0 Unchecked, 25.95ms Time], IncrementalHoareTripleChecker [1312 Valid, 4869 Invalid, 0 Unknown, 0 Unchecked, 2827.13ms Time] [2021-11-13 18:38:25,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63219 states. [2021-11-13 18:38:31,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63219 to 33803. [2021-11-13 18:38:31,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33803 states, 25604 states have (on average 1.262966723949383) internal successors, (32337), 25837 states have internal predecessors, (32337), 5185 states have call successors, (5185), 3014 states have call predecessors, (5185), 3013 states have return successors, (5160), 4951 states have call predecessors, (5160), 5160 states have call successors, (5160) [2021-11-13 18:38:32,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33803 states to 33803 states and 42682 transitions. [2021-11-13 18:38:32,077 INFO L78 Accepts]: Start accepts. Automaton has 33803 states and 42682 transitions. Word has length 224 [2021-11-13 18:38:32,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:32,078 INFO L470 AbstractCegarLoop]: Abstraction has 33803 states and 42682 transitions. [2021-11-13 18:38:32,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 16.05263157894737) internal successors, (305), 19 states have internal predecessors, (305), 8 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 8 states have call predecessors, (46), 8 states have call successors, (46) [2021-11-13 18:38:32,078 INFO L276 IsEmpty]: Start isEmpty. Operand 33803 states and 42682 transitions. [2021-11-13 18:38:32,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-13 18:38:32,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:32,087 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:38:32,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-13 18:38:32,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a26d20-86bd-4b1f-93c0-f8211105feb0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-13 18:38:32,287 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:32,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:32,288 INFO L85 PathProgramCache]: Analyzing trace with hash 838054128, now seen corresponding path program 1 times [2021-11-13 18:38:32,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:32,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653786219] [2021-11-13 18:38:32,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:32,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:32,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:32,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:38:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:32,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:38:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:32,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 18:38:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:32,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:38:32,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:32,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-13 18:38:32,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:32,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-13 18:38:32,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:32,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-13 18:38:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:32,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-13 18:38:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:32,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-13 18:38:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:32,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-13 18:38:32,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:32,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-13 18:38:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:32,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-11-13 18:38:32,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:32,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-11-13 18:38:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:32,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-11-13 18:38:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:32,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-11-13 18:38:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:32,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2021-11-13 18:38:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:32,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2021-11-13 18:38:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:32,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2021-11-13 18:38:32,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:32,446 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-11-13 18:38:32,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:32,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653786219] [2021-11-13 18:38:32,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653786219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:38:32,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:38:32,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:38:32,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629246842] [2021-11-13 18:38:32,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:38:32,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:38:32,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:32,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:38:32,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:38:32,449 INFO L87 Difference]: Start difference. First operand 33803 states and 42682 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18)