./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 ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 0.2.2-dev-ae00767 [2021-12-28 01:06:56,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:06:56,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:06:56,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:06:56,891 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:06:56,894 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:06:56,895 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:06:56,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:06:56,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:06:56,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:06:56,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:06:56,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:06:56,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:06:56,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:06:56,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:06:56,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:06:56,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:06:56,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:06:56,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:06:56,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:06:56,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:06:56,927 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:06:56,929 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:06:56,930 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:06:56,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:06:56,936 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:06:56,936 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:06:56,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:06:56,937 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:06:56,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:06:56,938 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:06:56,939 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:06:56,940 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:06:56,941 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:06:56,942 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:06:56,942 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:06:56,943 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:06:56,943 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:06:56,943 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:06:56,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:06:56,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:06:56,949 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:06:56,984 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:06:56,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:06:56,985 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:06:56,985 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:06:56,986 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:06:56,986 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:06:56,987 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:06:56,988 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:06:56,988 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:06:56,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:06:56,989 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:06:56,989 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:06:56,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:06:56,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:06:56,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:06:56,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:06:56,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:06:56,991 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:06:56,991 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:06:56,991 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:06:56,991 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:06:56,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:06:56,992 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:06:56,992 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:06:56,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:06:56,992 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:06:56,993 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:06:57,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:06:57,001 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:06:57,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:06:57,002 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:06:57,002 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:06:57,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:06:57,002 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5d72e5e7abaa750c1c0009f2e3addca35915e1b949637f5a49ed633aadc3fe53 [2021-12-28 01:06:57,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:06:57,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:06:57,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:06:57,320 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:06:57,320 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:06:57,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c [2021-12-28 01:06:57,393 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea601ea15/34f98b84cd0942d58926a67c39a69443/FLAG136627b2d [2021-12-28 01:06:57,891 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:06:57,892 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c [2021-12-28 01:06:57,903 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea601ea15/34f98b84cd0942d58926a67c39a69443/FLAG136627b2d [2021-12-28 01:06:58,384 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea601ea15/34f98b84cd0942d58926a67c39a69443 [2021-12-28 01:06:58,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:06:58,387 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:06:58,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:06:58,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:06:58,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:06:58,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:06:58" (1/1) ... [2021-12-28 01:06:58,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@193ee53f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:06:58, skipping insertion in model container [2021-12-28 01:06:58,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:06:58" (1/1) ... [2021-12-28 01:06:58,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:06:58,442 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:06:58,749 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c[14680,14693] [2021-12-28 01:06:58,755 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:06:58,762 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:06:58,841 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c[14680,14693] [2021-12-28 01:06:58,847 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:06:58,860 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:06:58,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:06:58 WrapperNode [2021-12-28 01:06:58,860 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:06:58,861 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:06:58,862 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:06:58,862 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:06:58,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:06:58" (1/1) ... [2021-12-28 01:06:58,879 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:06:58" (1/1) ... [2021-12-28 01:06:58,909 INFO L137 Inliner]: procedures = 32, calls = 48, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 535 [2021-12-28 01:06:58,910 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:06:58,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:06:58,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:06:58,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:06:58,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:06:58" (1/1) ... [2021-12-28 01:06:58,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:06:58" (1/1) ... [2021-12-28 01:06:58,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:06:58" (1/1) ... [2021-12-28 01:06:58,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:06:58" (1/1) ... [2021-12-28 01:06:58,931 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:06:58" (1/1) ... [2021-12-28 01:06:58,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:06:58" (1/1) ... [2021-12-28 01:06:58,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:06:58" (1/1) ... [2021-12-28 01:06:58,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:06:58,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:06:58,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:06:58,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:06:58,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:06:58" (1/1) ... [2021-12-28 01:06:58,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:06:58,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:06:59,016 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 01:06:59,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 01:06:59,054 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2021-12-28 01:06:59,055 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2021-12-28 01:06:59,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:06:59,056 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2021-12-28 01:06:59,056 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2021-12-28 01:06:59,056 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-12-28 01:06:59,056 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2021-12-28 01:06:59,059 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2021-12-28 01:06:59,059 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2021-12-28 01:06:59,060 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-28 01:06:59,060 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-28 01:06:59,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:06:59,060 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2021-12-28 01:06:59,060 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2021-12-28 01:06:59,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:06:59,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:06:59,061 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2021-12-28 01:06:59,061 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2021-12-28 01:06:59,191 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:06:59,209 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:06:59,680 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:06:59,687 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:06:59,687 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 01:06:59,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:06:59 BoogieIcfgContainer [2021-12-28 01:06:59,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:06:59,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:06:59,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:06:59,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:06:59,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:06:58" (1/3) ... [2021-12-28 01:06:59,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a2bd61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:06:59, skipping insertion in model container [2021-12-28 01:06:59,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:06:58" (2/3) ... [2021-12-28 01:06:59,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a2bd61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:06:59, skipping insertion in model container [2021-12-28 01:06:59,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:06:59" (3/3) ... [2021-12-28 01:06:59,698 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c [2021-12-28 01:06:59,702 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:06:59,702 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 01:06:59,735 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:06:59,740 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 [2021-12-28 01:06:59,740 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 01:06:59,759 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) [2021-12-28 01:06:59,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-28 01:06:59,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:06:59,766 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] [2021-12-28 01:06:59,766 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:06:59,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:06:59,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1527920627, now seen corresponding path program 1 times [2021-12-28 01:06:59,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:06:59,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322888345] [2021-12-28 01:06:59,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:06:59,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:06:59,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:06:59,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:06:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:06:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:06:59,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:06:59,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322888345] [2021-12-28 01:06:59,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322888345] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:06:59,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:06:59,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 01:06:59,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686991602] [2021-12-28 01:06:59,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:06:59,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 01:06:59,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:00,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 01:07:00,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 01:07:00,015 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) [2021-12-28 01:07:00,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:00,073 INFO L93 Difference]: Finished difference Result 392 states and 637 transitions. [2021-12-28 01:07:00,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 01:07:00,075 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 [2021-12-28 01:07:00,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:00,083 INFO L225 Difference]: With dead ends: 392 [2021-12-28 01:07:00,085 INFO L226 Difference]: Without dead ends: 202 [2021-12-28 01:07:00,090 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 [2021-12-28 01:07:00,092 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:00,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:00,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-28 01:07:00,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2021-12-28 01:07:00,137 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) [2021-12-28 01:07:00,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 307 transitions. [2021-12-28 01:07:00,142 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 307 transitions. Word has length 44 [2021-12-28 01:07:00,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:00,143 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 307 transitions. [2021-12-28 01:07:00,143 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) [2021-12-28 01:07:00,143 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 307 transitions. [2021-12-28 01:07:00,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-28 01:07:00,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:00,146 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] [2021-12-28 01:07:00,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:07:00,146 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:00,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:00,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1536686131, now seen corresponding path program 1 times [2021-12-28 01:07:00,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:00,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519580054] [2021-12-28 01:07:00,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:00,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:00,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:00,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:07:00,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:00,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519580054] [2021-12-28 01:07:00,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519580054] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:00,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:00,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:07:00,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135340897] [2021-12-28 01:07:00,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:00,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:07:00,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:00,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:07:00,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:07:00,276 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) [2021-12-28 01:07:00,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:00,353 INFO L93 Difference]: Finished difference Result 390 states and 588 transitions. [2021-12-28 01:07:00,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 01:07:00,354 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 [2021-12-28 01:07:00,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:00,356 INFO L225 Difference]: With dead ends: 390 [2021-12-28 01:07:00,359 INFO L226 Difference]: Without dead ends: 202 [2021-12-28 01:07:00,361 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 [2021-12-28 01:07:00,365 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 171 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1298 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:00,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 1298 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:00,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-28 01:07:00,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2021-12-28 01:07:00,391 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) [2021-12-28 01:07:00,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 295 transitions. [2021-12-28 01:07:00,399 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 295 transitions. Word has length 44 [2021-12-28 01:07:00,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:00,399 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 295 transitions. [2021-12-28 01:07:00,400 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) [2021-12-28 01:07:00,400 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 295 transitions. [2021-12-28 01:07:00,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-28 01:07:00,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:00,403 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] [2021-12-28 01:07:00,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:07:00,404 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:00,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:00,405 INFO L85 PathProgramCache]: Analyzing trace with hash 2082780786, now seen corresponding path program 1 times [2021-12-28 01:07:00,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:00,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118440009] [2021-12-28 01:07:00,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:00,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:00,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:00,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:00,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:07:00,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:00,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118440009] [2021-12-28 01:07:00,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118440009] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:00,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:00,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:07:00,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734529383] [2021-12-28 01:07:00,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:00,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:00,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:00,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:00,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:07:00,568 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) [2021-12-28 01:07:00,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:00,639 INFO L93 Difference]: Finished difference Result 391 states and 580 transitions. [2021-12-28 01:07:00,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:07:00,640 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 [2021-12-28 01:07:00,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:00,644 INFO L225 Difference]: With dead ends: 391 [2021-12-28 01:07:00,644 INFO L226 Difference]: Without dead ends: 206 [2021-12-28 01:07:00,645 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 [2021-12-28 01:07:00,651 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 5 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:00,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 857 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:00,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-12-28 01:07:00,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2021-12-28 01:07:00,684 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) [2021-12-28 01:07:00,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 298 transitions. [2021-12-28 01:07:00,686 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 298 transitions. Word has length 55 [2021-12-28 01:07:00,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:00,686 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 298 transitions. [2021-12-28 01:07:00,687 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) [2021-12-28 01:07:00,687 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 298 transitions. [2021-12-28 01:07:00,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-28 01:07:00,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:00,689 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] [2021-12-28 01:07:00,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 01:07:00,690 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:00,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:00,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1990587108, now seen corresponding path program 1 times [2021-12-28 01:07:00,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:00,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403869090] [2021-12-28 01:07:00,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:00,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:00,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:00,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:00,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 01:07:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:00,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-28 01:07:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:00,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 01:07:00,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:00,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403869090] [2021-12-28 01:07:00,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403869090] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:00,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:00,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:07:00,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312867062] [2021-12-28 01:07:00,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:00,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:07:00,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:00,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:07:00,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:07:00,862 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) [2021-12-28 01:07:00,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:00,909 INFO L93 Difference]: Finished difference Result 561 states and 823 transitions. [2021-12-28 01:07:00,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:07:00,910 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 [2021-12-28 01:07:00,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:00,914 INFO L225 Difference]: With dead ends: 561 [2021-12-28 01:07:00,914 INFO L226 Difference]: Without dead ends: 372 [2021-12-28 01:07:00,915 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 [2021-12-28 01:07:00,922 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 226 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:00,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 620 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:00,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-12-28 01:07:00,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 363. [2021-12-28 01:07:00,966 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) [2021-12-28 01:07:00,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 532 transitions. [2021-12-28 01:07:00,971 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 532 transitions. Word has length 71 [2021-12-28 01:07:00,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:00,972 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 532 transitions. [2021-12-28 01:07:00,972 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) [2021-12-28 01:07:00,972 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 532 transitions. [2021-12-28 01:07:00,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-28 01:07:00,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:00,978 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] [2021-12-28 01:07:00,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 01:07:00,979 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:00,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:00,979 INFO L85 PathProgramCache]: Analyzing trace with hash 687571372, now seen corresponding path program 1 times [2021-12-28 01:07:00,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:00,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698836918] [2021-12-28 01:07:00,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:00,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:01,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:01,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 01:07:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:01,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-28 01:07:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:01,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 01:07:01,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:01,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698836918] [2021-12-28 01:07:01,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698836918] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:01,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:01,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:07:01,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168789567] [2021-12-28 01:07:01,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:01,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:07:01,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:01,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:07:01,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:07:01,084 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) [2021-12-28 01:07:01,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:01,143 INFO L93 Difference]: Finished difference Result 1006 states and 1489 transitions. [2021-12-28 01:07:01,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:07:01,144 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 [2021-12-28 01:07:01,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:01,151 INFO L225 Difference]: With dead ends: 1006 [2021-12-28 01:07:01,152 INFO L226 Difference]: Without dead ends: 660 [2021-12-28 01:07:01,153 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 [2021-12-28 01:07:01,154 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 234 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:01,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 655 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:01,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-12-28 01:07:01,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 643. [2021-12-28 01:07:01,202 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) [2021-12-28 01:07:01,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 955 transitions. [2021-12-28 01:07:01,208 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 955 transitions. Word has length 72 [2021-12-28 01:07:01,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:01,209 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 955 transitions. [2021-12-28 01:07:01,210 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) [2021-12-28 01:07:01,210 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 955 transitions. [2021-12-28 01:07:01,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-28 01:07:01,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:01,213 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] [2021-12-28 01:07:01,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 01:07:01,214 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:01,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:01,215 INFO L85 PathProgramCache]: Analyzing trace with hash -592292306, now seen corresponding path program 1 times [2021-12-28 01:07:01,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:01,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935363773] [2021-12-28 01:07:01,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:01,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:01,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:01,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 01:07:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:01,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-28 01:07:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 01:07:01,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:01,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935363773] [2021-12-28 01:07:01,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935363773] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:01,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:01,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:07:01,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439916309] [2021-12-28 01:07:01,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:01,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:07:01,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:01,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:07:01,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:01,348 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) [2021-12-28 01:07:01,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:01,711 INFO L93 Difference]: Finished difference Result 1799 states and 2717 transitions. [2021-12-28 01:07:01,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:07:01,712 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 [2021-12-28 01:07:01,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:01,721 INFO L225 Difference]: With dead ends: 1799 [2021-12-28 01:07:01,721 INFO L226 Difference]: Without dead ends: 1173 [2021-12-28 01:07:01,723 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 [2021-12-28 01:07:01,724 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 783 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:01,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 775 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:07:01,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-12-28 01:07:01,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 768. [2021-12-28 01:07:01,789 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) [2021-12-28 01:07:01,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1119 transitions. [2021-12-28 01:07:01,794 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1119 transitions. Word has length 72 [2021-12-28 01:07:01,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:01,794 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 1119 transitions. [2021-12-28 01:07:01,795 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) [2021-12-28 01:07:01,795 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1119 transitions. [2021-12-28 01:07:01,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-28 01:07:01,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:01,797 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] [2021-12-28 01:07:01,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 01:07:01,797 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:01,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:01,798 INFO L85 PathProgramCache]: Analyzing trace with hash 9157699, now seen corresponding path program 1 times [2021-12-28 01:07:01,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:01,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425417437] [2021-12-28 01:07:01,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:01,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:01,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:01,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:01,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 01:07:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:01,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 01:07:01,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:01,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 01:07:01,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:01,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425417437] [2021-12-28 01:07:01,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425417437] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:01,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:01,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:07:01,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779579623] [2021-12-28 01:07:01,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:01,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:07:01,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:01,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:07:01,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:01,906 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) [2021-12-28 01:07:02,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:02,221 INFO L93 Difference]: Finished difference Result 1803 states and 2717 transitions. [2021-12-28 01:07:02,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:07:02,222 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 [2021-12-28 01:07:02,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:02,228 INFO L225 Difference]: With dead ends: 1803 [2021-12-28 01:07:02,228 INFO L226 Difference]: Without dead ends: 1177 [2021-12-28 01:07:02,231 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 [2021-12-28 01:07:02,232 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 780 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:02,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 777 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:07:02,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-12-28 01:07:02,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 776. [2021-12-28 01:07:02,293 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) [2021-12-28 01:07:02,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1127 transitions. [2021-12-28 01:07:02,297 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1127 transitions. Word has length 73 [2021-12-28 01:07:02,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:02,298 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 1127 transitions. [2021-12-28 01:07:02,298 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) [2021-12-28 01:07:02,298 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1127 transitions. [2021-12-28 01:07:02,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-28 01:07:02,300 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:02,300 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] [2021-12-28 01:07:02,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 01:07:02,300 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:02,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:02,301 INFO L85 PathProgramCache]: Analyzing trace with hash 341297525, now seen corresponding path program 1 times [2021-12-28 01:07:02,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:02,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963023414] [2021-12-28 01:07:02,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:02,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:02,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:02,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 01:07:02,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:02,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-28 01:07:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 01:07:02,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:02,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963023414] [2021-12-28 01:07:02,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963023414] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:02,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:02,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:07:02,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713650950] [2021-12-28 01:07:02,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:02,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:02,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:02,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:02,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:07:02,386 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) [2021-12-28 01:07:02,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:02,726 INFO L93 Difference]: Finished difference Result 1803 states and 2709 transitions. [2021-12-28 01:07:02,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:07:02,727 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 [2021-12-28 01:07:02,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:02,733 INFO L225 Difference]: With dead ends: 1803 [2021-12-28 01:07:02,733 INFO L226 Difference]: Without dead ends: 1177 [2021-12-28 01:07:02,736 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 [2021-12-28 01:07:02,737 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 237 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:02,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 744 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:07:02,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-12-28 01:07:02,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 776. [2021-12-28 01:07:02,806 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) [2021-12-28 01:07:02,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1123 transitions. [2021-12-28 01:07:02,812 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1123 transitions. Word has length 75 [2021-12-28 01:07:02,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:02,812 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 1123 transitions. [2021-12-28 01:07:02,813 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) [2021-12-28 01:07:02,813 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1123 transitions. [2021-12-28 01:07:02,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-28 01:07:02,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:02,817 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] [2021-12-28 01:07:02,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 01:07:02,818 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:02,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:02,818 INFO L85 PathProgramCache]: Analyzing trace with hash 662931196, now seen corresponding path program 1 times [2021-12-28 01:07:02,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:02,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297012705] [2021-12-28 01:07:02,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:02,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:02,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:02,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:02,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 01:07:02,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:02,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-28 01:07:02,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 01:07:02,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:02,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297012705] [2021-12-28 01:07:02,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297012705] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:02,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:02,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:07:02,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636890045] [2021-12-28 01:07:02,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:02,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:02,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:02,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:02,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:07:02,953 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) [2021-12-28 01:07:03,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:03,024 INFO L93 Difference]: Finished difference Result 1422 states and 2088 transitions. [2021-12-28 01:07:03,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:07:03,025 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 [2021-12-28 01:07:03,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:03,029 INFO L225 Difference]: With dead ends: 1422 [2021-12-28 01:07:03,029 INFO L226 Difference]: Without dead ends: 796 [2021-12-28 01:07:03,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:03,032 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 6 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:03,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 869 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:03,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-12-28 01:07:03,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 796. [2021-12-28 01:07:03,090 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) [2021-12-28 01:07:03,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1139 transitions. [2021-12-28 01:07:03,095 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1139 transitions. Word has length 76 [2021-12-28 01:07:03,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:03,095 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 1139 transitions. [2021-12-28 01:07:03,095 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) [2021-12-28 01:07:03,095 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1139 transitions. [2021-12-28 01:07:03,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-28 01:07:03,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:03,097 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] [2021-12-28 01:07:03,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 01:07:03,097 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:03,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:03,098 INFO L85 PathProgramCache]: Analyzing trace with hash -520002270, now seen corresponding path program 1 times [2021-12-28 01:07:03,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:03,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751641209] [2021-12-28 01:07:03,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:03,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:03,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:03,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:03,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 01:07:03,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:03,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-28 01:07:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:03,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 01:07:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 01:07:03,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:03,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751641209] [2021-12-28 01:07:03,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751641209] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:03,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:03,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:07:03,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398838347] [2021-12-28 01:07:03,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:03,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:03,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:03,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:03,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:07:03,216 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) [2021-12-28 01:07:03,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:03,292 INFO L93 Difference]: Finished difference Result 1462 states and 2132 transitions. [2021-12-28 01:07:03,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:07:03,293 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 [2021-12-28 01:07:03,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:03,297 INFO L225 Difference]: With dead ends: 1462 [2021-12-28 01:07:03,297 INFO L226 Difference]: Without dead ends: 816 [2021-12-28 01:07:03,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:03,300 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 6 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:03,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 855 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:03,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-12-28 01:07:03,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 816. [2021-12-28 01:07:03,355 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) [2021-12-28 01:07:03,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1155 transitions. [2021-12-28 01:07:03,360 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1155 transitions. Word has length 84 [2021-12-28 01:07:03,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:03,360 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 1155 transitions. [2021-12-28 01:07:03,360 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) [2021-12-28 01:07:03,361 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1155 transitions. [2021-12-28 01:07:03,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-28 01:07:03,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:03,362 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] [2021-12-28 01:07:03,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 01:07:03,363 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:03,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:03,363 INFO L85 PathProgramCache]: Analyzing trace with hash -285867028, now seen corresponding path program 1 times [2021-12-28 01:07:03,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:03,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479860321] [2021-12-28 01:07:03,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:03,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:03,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:03,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:03,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 01:07:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:03,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-28 01:07:03,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:03,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 01:07:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:03,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 01:07:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:03,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 01:07:03,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:03,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479860321] [2021-12-28 01:07:03,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479860321] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:03,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:03,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:07:03,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917216909] [2021-12-28 01:07:03,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:03,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:03,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:03,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:03,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:07:03,452 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) [2021-12-28 01:07:03,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:03,520 INFO L93 Difference]: Finished difference Result 1498 states and 2148 transitions. [2021-12-28 01:07:03,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:07:03,521 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 [2021-12-28 01:07:03,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:03,525 INFO L225 Difference]: With dead ends: 1498 [2021-12-28 01:07:03,525 INFO L226 Difference]: Without dead ends: 832 [2021-12-28 01:07:03,527 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 [2021-12-28 01:07:03,527 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 5 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:03,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 864 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:03,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-12-28 01:07:03,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 832. [2021-12-28 01:07:03,583 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) [2021-12-28 01:07:03,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1167 transitions. [2021-12-28 01:07:03,587 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1167 transitions. Word has length 92 [2021-12-28 01:07:03,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:03,588 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 1167 transitions. [2021-12-28 01:07:03,588 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) [2021-12-28 01:07:03,588 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1167 transitions. [2021-12-28 01:07:03,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-28 01:07:03,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:03,590 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] [2021-12-28 01:07:03,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 01:07:03,591 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:03,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:03,591 INFO L85 PathProgramCache]: Analyzing trace with hash 2110592275, now seen corresponding path program 1 times [2021-12-28 01:07:03,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:03,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703434877] [2021-12-28 01:07:03,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:03,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:03,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:03,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 01:07:03,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:03,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-28 01:07:03,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:03,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 01:07:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:03,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 01:07:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:03,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 01:07:03,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:03,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703434877] [2021-12-28 01:07:03,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703434877] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:03,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:03,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:07:03,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439137376] [2021-12-28 01:07:03,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:03,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:03,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:03,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:03,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:07:03,693 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) [2021-12-28 01:07:03,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:03,770 INFO L93 Difference]: Finished difference Result 1534 states and 2188 transitions. [2021-12-28 01:07:03,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:07:03,771 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 [2021-12-28 01:07:03,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:03,775 INFO L225 Difference]: With dead ends: 1534 [2021-12-28 01:07:03,776 INFO L226 Difference]: Without dead ends: 852 [2021-12-28 01:07:03,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:03,778 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 6 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:03,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 855 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:03,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-12-28 01:07:03,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 852. [2021-12-28 01:07:03,826 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) [2021-12-28 01:07:03,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1183 transitions. [2021-12-28 01:07:03,830 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1183 transitions. Word has length 92 [2021-12-28 01:07:03,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:03,830 INFO L470 AbstractCegarLoop]: Abstraction has 852 states and 1183 transitions. [2021-12-28 01:07:03,831 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) [2021-12-28 01:07:03,831 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1183 transitions. [2021-12-28 01:07:03,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-28 01:07:03,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:03,833 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] [2021-12-28 01:07:03,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 01:07:03,833 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:03,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:03,834 INFO L85 PathProgramCache]: Analyzing trace with hash 483840627, now seen corresponding path program 1 times [2021-12-28 01:07:03,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:03,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990608710] [2021-12-28 01:07:03,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:03,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:03,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:03,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:03,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 01:07:03,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:03,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-28 01:07:03,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:03,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 01:07:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:03,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 01:07:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:03,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 01:07:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-28 01:07:03,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:03,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990608710] [2021-12-28 01:07:03,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990608710] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:03,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:03,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:07:03,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009560809] [2021-12-28 01:07:03,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:03,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:03,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:03,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:03,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:07:03,940 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) [2021-12-28 01:07:04,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:04,011 INFO L93 Difference]: Finished difference Result 1578 states and 2216 transitions. [2021-12-28 01:07:04,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:07:04,011 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 [2021-12-28 01:07:04,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:04,016 INFO L225 Difference]: With dead ends: 1578 [2021-12-28 01:07:04,016 INFO L226 Difference]: Without dead ends: 876 [2021-12-28 01:07:04,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:04,019 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 7 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:04,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 866 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:04,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2021-12-28 01:07:04,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 876. [2021-12-28 01:07:04,069 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) [2021-12-28 01:07:04,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1203 transitions. [2021-12-28 01:07:04,072 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1203 transitions. Word has length 100 [2021-12-28 01:07:04,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:04,072 INFO L470 AbstractCegarLoop]: Abstraction has 876 states and 1203 transitions. [2021-12-28 01:07:04,072 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) [2021-12-28 01:07:04,073 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1203 transitions. [2021-12-28 01:07:04,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-28 01:07:04,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:04,075 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] [2021-12-28 01:07:04,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 01:07:04,076 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:04,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:04,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1857958922, now seen corresponding path program 1 times [2021-12-28 01:07:04,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:04,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40565047] [2021-12-28 01:07:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:04,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:04,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:04,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:04,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 01:07:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:04,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-28 01:07:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:04,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 01:07:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:04,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 01:07:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:04,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 01:07:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:04,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-28 01:07:04,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:04,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 01:07:04,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:04,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40565047] [2021-12-28 01:07:04,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40565047] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:04,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:04,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:07:04,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525934453] [2021-12-28 01:07:04,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:04,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:07:04,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:04,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:07:04,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:07:04,274 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) [2021-12-28 01:07:04,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:04,568 INFO L93 Difference]: Finished difference Result 2489 states and 3477 transitions. [2021-12-28 01:07:04,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 01:07:04,569 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 [2021-12-28 01:07:04,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:04,576 INFO L225 Difference]: With dead ends: 2489 [2021-12-28 01:07:04,576 INFO L226 Difference]: Without dead ends: 1763 [2021-12-28 01:07:04,578 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 [2021-12-28 01:07:04,579 INFO L933 BasicCegarLoop]: 417 mSDtfsCounter, 392 mSDsluCounter, 1888 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 2305 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:04,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 2305 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:07:04,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2021-12-28 01:07:04,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1160. [2021-12-28 01:07:04,669 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) [2021-12-28 01:07:04,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1581 transitions. [2021-12-28 01:07:04,675 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1581 transitions. Word has length 103 [2021-12-28 01:07:04,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:04,675 INFO L470 AbstractCegarLoop]: Abstraction has 1160 states and 1581 transitions. [2021-12-28 01:07:04,675 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) [2021-12-28 01:07:04,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1581 transitions. [2021-12-28 01:07:04,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-28 01:07:04,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:04,677 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] [2021-12-28 01:07:04,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 01:07:04,678 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:04,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:04,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1544619372, now seen corresponding path program 1 times [2021-12-28 01:07:04,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:04,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776517768] [2021-12-28 01:07:04,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:04,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:04,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:04,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 01:07:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:04,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-28 01:07:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:04,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 01:07:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:04,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 01:07:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:04,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 01:07:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:04,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:04,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 01:07:04,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:04,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776517768] [2021-12-28 01:07:04,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776517768] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:04,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:04,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:07:04,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651526013] [2021-12-28 01:07:04,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:04,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:04,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:04,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:04,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:07:04,768 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) [2021-12-28 01:07:04,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:04,876 INFO L93 Difference]: Finished difference Result 2126 states and 2924 transitions. [2021-12-28 01:07:04,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:07:04,877 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 [2021-12-28 01:07:04,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:04,883 INFO L225 Difference]: With dead ends: 2126 [2021-12-28 01:07:04,883 INFO L226 Difference]: Without dead ends: 1184 [2021-12-28 01:07:04,886 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 [2021-12-28 01:07:04,887 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 5 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:04,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 864 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:04,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-12-28 01:07:04,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 1184. [2021-12-28 01:07:04,969 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) [2021-12-28 01:07:04,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1599 transitions. [2021-12-28 01:07:04,973 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1599 transitions. Word has length 107 [2021-12-28 01:07:04,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:04,974 INFO L470 AbstractCegarLoop]: Abstraction has 1184 states and 1599 transitions. [2021-12-28 01:07:04,974 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) [2021-12-28 01:07:04,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1599 transitions. [2021-12-28 01:07:04,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-28 01:07:04,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:04,975 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] [2021-12-28 01:07:04,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 01:07:04,975 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:04,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:04,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1746652564, now seen corresponding path program 1 times [2021-12-28 01:07:04,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:04,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500292848] [2021-12-28 01:07:04,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:04,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:05,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:05,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 01:07:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:05,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-28 01:07:05,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:05,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 01:07:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:05,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 01:07:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:05,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 01:07:05,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:05,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-28 01:07:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:05,085 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-28 01:07:05,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:05,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500292848] [2021-12-28 01:07:05,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500292848] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:05,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:05,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:07:05,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496967871] [2021-12-28 01:07:05,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:05,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:07:05,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:05,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:07:05,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:07:05,088 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) [2021-12-28 01:07:05,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:05,247 INFO L93 Difference]: Finished difference Result 1655 states and 2343 transitions. [2021-12-28 01:07:05,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 01:07:05,248 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 [2021-12-28 01:07:05,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:05,255 INFO L225 Difference]: With dead ends: 1655 [2021-12-28 01:07:05,255 INFO L226 Difference]: Without dead ends: 1653 [2021-12-28 01:07:05,256 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 [2021-12-28 01:07:05,257 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 261 mSDsluCounter, 1740 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 2255 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:05,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 2255 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:05,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2021-12-28 01:07:05,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1192. [2021-12-28 01:07:05,342 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) [2021-12-28 01:07:05,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1607 transitions. [2021-12-28 01:07:05,347 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1607 transitions. Word has length 106 [2021-12-28 01:07:05,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:05,347 INFO L470 AbstractCegarLoop]: Abstraction has 1192 states and 1607 transitions. [2021-12-28 01:07:05,347 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) [2021-12-28 01:07:05,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1607 transitions. [2021-12-28 01:07:05,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-28 01:07:05,349 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:05,349 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] [2021-12-28 01:07:05,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 01:07:05,349 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:05,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:05,350 INFO L85 PathProgramCache]: Analyzing trace with hash 285885957, now seen corresponding path program 1 times [2021-12-28 01:07:05,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:05,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216203975] [2021-12-28 01:07:05,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:05,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:05,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:05,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:05,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 01:07:05,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:05,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-28 01:07:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:05,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 01:07:05,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:05,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 01:07:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:05,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 01:07:05,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:05,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-28 01:07:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:05,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-28 01:07:05,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:05,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216203975] [2021-12-28 01:07:05,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216203975] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:05,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:05,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:07:05,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314976823] [2021-12-28 01:07:05,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:05,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:07:05,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:05,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:07:05,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:07:05,455 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) [2021-12-28 01:07:05,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:05,697 INFO L93 Difference]: Finished difference Result 2446 states and 3360 transitions. [2021-12-28 01:07:05,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 01:07:05,698 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 [2021-12-28 01:07:05,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:05,705 INFO L225 Difference]: With dead ends: 2446 [2021-12-28 01:07:05,705 INFO L226 Difference]: Without dead ends: 1554 [2021-12-28 01:07:05,708 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 [2021-12-28 01:07:05,709 INFO L933 BasicCegarLoop]: 410 mSDtfsCounter, 524 mSDsluCounter, 1854 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 2264 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:05,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 2264 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:07:05,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2021-12-28 01:07:05,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1236. [2021-12-28 01:07:05,822 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) [2021-12-28 01:07:05,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1648 transitions. [2021-12-28 01:07:05,826 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1648 transitions. Word has length 109 [2021-12-28 01:07:05,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:05,826 INFO L470 AbstractCegarLoop]: Abstraction has 1236 states and 1648 transitions. [2021-12-28 01:07:05,826 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) [2021-12-28 01:07:05,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1648 transitions. [2021-12-28 01:07:05,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-28 01:07:05,828 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:05,828 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] [2021-12-28 01:07:05,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 01:07:05,828 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:05,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:05,829 INFO L85 PathProgramCache]: Analyzing trace with hash 641112124, now seen corresponding path program 1 times [2021-12-28 01:07:05,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:05,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513091095] [2021-12-28 01:07:05,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:05,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:05,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:05,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:05,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:05,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 01:07:05,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:05,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-28 01:07:05,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:05,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 01:07:05,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:05,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 01:07:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:05,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 01:07:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:05,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-28 01:07:05,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:05,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-28 01:07:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-28 01:07:05,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:05,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513091095] [2021-12-28 01:07:05,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513091095] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:05,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:05,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:07:05,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752388659] [2021-12-28 01:07:05,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:05,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:07:05,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:05,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:07:05,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:07:05,944 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) [2021-12-28 01:07:06,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:06,242 INFO L93 Difference]: Finished difference Result 2538 states and 3469 transitions. [2021-12-28 01:07:06,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 01:07:06,243 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 [2021-12-28 01:07:06,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:06,249 INFO L225 Difference]: With dead ends: 2538 [2021-12-28 01:07:06,250 INFO L226 Difference]: Without dead ends: 1582 [2021-12-28 01:07:06,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:07:06,252 INFO L933 BasicCegarLoop]: 440 mSDtfsCounter, 396 mSDsluCounter, 1974 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 2414 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:06,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 2414 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:07:06,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-12-28 01:07:06,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1123. [2021-12-28 01:07:06,357 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) [2021-12-28 01:07:06,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1499 transitions. [2021-12-28 01:07:06,360 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1499 transitions. Word has length 111 [2021-12-28 01:07:06,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:06,361 INFO L470 AbstractCegarLoop]: Abstraction has 1123 states and 1499 transitions. [2021-12-28 01:07:06,361 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) [2021-12-28 01:07:06,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1499 transitions. [2021-12-28 01:07:06,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-28 01:07:06,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:06,362 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] [2021-12-28 01:07:06,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 01:07:06,363 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:06,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:06,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1939847605, now seen corresponding path program 1 times [2021-12-28 01:07:06,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:06,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122506456] [2021-12-28 01:07:06,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:06,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:06,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:06,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:06,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 01:07:06,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:06,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-28 01:07:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:06,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 01:07:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:06,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 01:07:06,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:06,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 01:07:06,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:06,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:06,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 01:07:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-28 01:07:06,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:06,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122506456] [2021-12-28 01:07:06,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122506456] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:06,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:06,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 01:07:06,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931894933] [2021-12-28 01:07:06,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:06,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 01:07:06,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:06,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 01:07:06,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:07:06,483 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) [2021-12-28 01:07:07,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:07,131 INFO L93 Difference]: Finished difference Result 2606 states and 3573 transitions. [2021-12-28 01:07:07,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 01:07:07,132 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 [2021-12-28 01:07:07,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:07,139 INFO L225 Difference]: With dead ends: 2606 [2021-12-28 01:07:07,140 INFO L226 Difference]: Without dead ends: 1683 [2021-12-28 01:07:07,142 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 [2021-12-28 01:07:07,142 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 1047 mSDsluCounter, 1646 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 2152 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:07,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1053 Valid, 2152 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 01:07:07,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2021-12-28 01:07:07,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1139. [2021-12-28 01:07:07,269 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) [2021-12-28 01:07:07,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1498 transitions. [2021-12-28 01:07:07,272 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1498 transitions. Word has length 112 [2021-12-28 01:07:07,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:07,272 INFO L470 AbstractCegarLoop]: Abstraction has 1139 states and 1498 transitions. [2021-12-28 01:07:07,272 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) [2021-12-28 01:07:07,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1498 transitions. [2021-12-28 01:07:07,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-28 01:07:07,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:07,274 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] [2021-12-28 01:07:07,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 01:07:07,274 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:07,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:07,275 INFO L85 PathProgramCache]: Analyzing trace with hash 889695918, now seen corresponding path program 1 times [2021-12-28 01:07:07,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:07,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558260724] [2021-12-28 01:07:07,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:07,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:07,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:07,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:07,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 01:07:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:07,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-28 01:07:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:07,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 01:07:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:07,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 01:07:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:07,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 01:07:07,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:07,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:07,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 01:07:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-28 01:07:07,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:07,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558260724] [2021-12-28 01:07:07,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558260724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:07,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:07,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:07:07,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499640118] [2021-12-28 01:07:07,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:07,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:07,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:07,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:07,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:07:07,346 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) [2021-12-28 01:07:07,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:07,656 INFO L93 Difference]: Finished difference Result 3175 states and 4263 transitions. [2021-12-28 01:07:07,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:07:07,657 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 [2021-12-28 01:07:07,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:07,666 INFO L225 Difference]: With dead ends: 3175 [2021-12-28 01:07:07,666 INFO L226 Difference]: Without dead ends: 2287 [2021-12-28 01:07:07,668 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 [2021-12-28 01:07:07,669 INFO L933 BasicCegarLoop]: 510 mSDtfsCounter, 437 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:07,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 1223 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:07:07,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-12-28 01:07:07,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 1935. [2021-12-28 01:07:07,849 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) [2021-12-28 01:07:07,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 2548 transitions. [2021-12-28 01:07:07,854 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 2548 transitions. Word has length 112 [2021-12-28 01:07:07,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:07,854 INFO L470 AbstractCegarLoop]: Abstraction has 1935 states and 2548 transitions. [2021-12-28 01:07:07,855 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) [2021-12-28 01:07:07,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 2548 transitions. [2021-12-28 01:07:07,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-28 01:07:07,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:07,856 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] [2021-12-28 01:07:07,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-28 01:07:07,857 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:07,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:07,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1041296419, now seen corresponding path program 1 times [2021-12-28 01:07:07,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:07,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225496094] [2021-12-28 01:07:07,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:07,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:07,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:07,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 01:07:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:07,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-28 01:07:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:07,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 01:07:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:07,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 01:07:07,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:07,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 01:07:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:07,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:07,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:07,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 01:07:07,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:07,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-28 01:07:07,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:07,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225496094] [2021-12-28 01:07:07,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225496094] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:07,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:07,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:07:07,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222524276] [2021-12-28 01:07:07,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:07,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:07:07,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:07,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:07:07,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:07:07,991 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) [2021-12-28 01:07:08,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:08,787 INFO L93 Difference]: Finished difference Result 4386 states and 5918 transitions. [2021-12-28 01:07:08,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 01:07:08,788 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 [2021-12-28 01:07:08,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:08,801 INFO L225 Difference]: With dead ends: 4386 [2021-12-28 01:07:08,801 INFO L226 Difference]: Without dead ends: 2800 [2021-12-28 01:07:08,807 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 [2021-12-28 01:07:08,807 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 802 mSDsluCounter, 1930 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 2505 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:08,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [805 Valid, 2505 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 01:07:08,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2800 states. [2021-12-28 01:07:09,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2800 to 1954. [2021-12-28 01:07:09,033 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) [2021-12-28 01:07:09,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1954 states to 1954 states and 2566 transitions. [2021-12-28 01:07:09,038 INFO L78 Accepts]: Start accepts. Automaton has 1954 states and 2566 transitions. Word has length 114 [2021-12-28 01:07:09,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:09,039 INFO L470 AbstractCegarLoop]: Abstraction has 1954 states and 2566 transitions. [2021-12-28 01:07:09,039 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) [2021-12-28 01:07:09,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1954 states and 2566 transitions. [2021-12-28 01:07:09,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-28 01:07:09,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:09,041 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] [2021-12-28 01:07:09,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-28 01:07:09,041 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:09,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:09,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1708808100, now seen corresponding path program 1 times [2021-12-28 01:07:09,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:09,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106811116] [2021-12-28 01:07:09,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:09,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:09,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:09,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:09,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 01:07:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:09,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 01:07:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:09,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-28 01:07:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:09,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 01:07:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:09,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-28 01:07:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:09,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-28 01:07:09,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:09,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-28 01:07:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:09,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-28 01:07:09,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:09,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106811116] [2021-12-28 01:07:09,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106811116] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:09,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:09,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:07:09,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185477286] [2021-12-28 01:07:09,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:09,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:09,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:09,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:09,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:07:09,109 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) [2021-12-28 01:07:09,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:09,562 INFO L93 Difference]: Finished difference Result 5154 states and 6849 transitions. [2021-12-28 01:07:09,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:07:09,563 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 [2021-12-28 01:07:09,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:09,578 INFO L225 Difference]: With dead ends: 5154 [2021-12-28 01:07:09,578 INFO L226 Difference]: Without dead ends: 3584 [2021-12-28 01:07:09,583 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 [2021-12-28 01:07:09,584 INFO L933 BasicCegarLoop]: 526 mSDtfsCounter, 484 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:09,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 1287 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:07:09,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3584 states. [2021-12-28 01:07:09,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3584 to 3015. [2021-12-28 01:07:09,897 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) [2021-12-28 01:07:09,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 3957 transitions. [2021-12-28 01:07:09,905 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 3957 transitions. Word has length 115 [2021-12-28 01:07:09,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:09,905 INFO L470 AbstractCegarLoop]: Abstraction has 3015 states and 3957 transitions. [2021-12-28 01:07:09,906 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) [2021-12-28 01:07:09,906 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 3957 transitions. [2021-12-28 01:07:09,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-28 01:07:09,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:09,909 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] [2021-12-28 01:07:09,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-28 01:07:09,910 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:09,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:09,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1228455916, now seen corresponding path program 1 times [2021-12-28 01:07:09,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:09,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627997303] [2021-12-28 01:07:09,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:09,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:09,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:09,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-28 01:07:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:09,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-28 01:07:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:09,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-28 01:07:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:09,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 01:07:09,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:09,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 01:07:09,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:09,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-28 01:07:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:09,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-28 01:07:09,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:09,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-28 01:07:09,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:09,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627997303] [2021-12-28 01:07:09,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627997303] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:09,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:09,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:07:09,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068854395] [2021-12-28 01:07:09,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:09,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:09,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:09,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:09,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:07:09,980 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) [2021-12-28 01:07:10,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:10,572 INFO L93 Difference]: Finished difference Result 7127 states and 9424 transitions. [2021-12-28 01:07:10,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:07:10,573 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 [2021-12-28 01:07:10,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:10,587 INFO L225 Difference]: With dead ends: 7127 [2021-12-28 01:07:10,588 INFO L226 Difference]: Without dead ends: 4626 [2021-12-28 01:07:10,595 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 [2021-12-28 01:07:10,596 INFO L933 BasicCegarLoop]: 549 mSDtfsCounter, 431 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:10,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 1283 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:07:10,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4626 states. [2021-12-28 01:07:11,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4626 to 4292. [2021-12-28 01:07:11,063 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) [2021-12-28 01:07:11,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 5631 transitions. [2021-12-28 01:07:11,074 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 5631 transitions. Word has length 115 [2021-12-28 01:07:11,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:11,075 INFO L470 AbstractCegarLoop]: Abstraction has 4292 states and 5631 transitions. [2021-12-28 01:07:11,075 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) [2021-12-28 01:07:11,075 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 5631 transitions. [2021-12-28 01:07:11,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-28 01:07:11,078 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:11,078 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] [2021-12-28 01:07:11,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-28 01:07:11,078 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:11,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:11,079 INFO L85 PathProgramCache]: Analyzing trace with hash 331094376, now seen corresponding path program 1 times [2021-12-28 01:07:11,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:11,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913509785] [2021-12-28 01:07:11,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:11,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:11,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:11,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 01:07:11,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:11,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-28 01:07:11,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:11,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 01:07:11,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:11,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-28 01:07:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:11,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 01:07:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:11,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-28 01:07:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:11,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-28 01:07:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-28 01:07:11,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:11,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913509785] [2021-12-28 01:07:11,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913509785] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:11,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:11,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:07:11,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722981424] [2021-12-28 01:07:11,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:11,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:07:11,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:11,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:07:11,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:07:11,149 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) [2021-12-28 01:07:11,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:11,798 INFO L93 Difference]: Finished difference Result 9705 states and 13179 transitions. [2021-12-28 01:07:11,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:07:11,799 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 [2021-12-28 01:07:11,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:11,819 INFO L225 Difference]: With dead ends: 9705 [2021-12-28 01:07:11,819 INFO L226 Difference]: Without dead ends: 5818 [2021-12-28 01:07:11,830 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 [2021-12-28 01:07:11,831 INFO L933 BasicCegarLoop]: 458 mSDtfsCounter, 151 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:11,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 704 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:07:11,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5818 states. [2021-12-28 01:07:12,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5818 to 4298. [2021-12-28 01:07:12,264 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) [2021-12-28 01:07:12,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4298 states to 4298 states and 5637 transitions. [2021-12-28 01:07:12,278 INFO L78 Accepts]: Start accepts. Automaton has 4298 states and 5637 transitions. Word has length 116 [2021-12-28 01:07:12,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:12,278 INFO L470 AbstractCegarLoop]: Abstraction has 4298 states and 5637 transitions. [2021-12-28 01:07:12,278 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) [2021-12-28 01:07:12,278 INFO L276 IsEmpty]: Start isEmpty. Operand 4298 states and 5637 transitions. [2021-12-28 01:07:12,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-28 01:07:12,281 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:12,281 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] [2021-12-28 01:07:12,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-28 01:07:12,281 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:12,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:12,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1590062833, now seen corresponding path program 1 times [2021-12-28 01:07:12,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:12,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108713290] [2021-12-28 01:07:12,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:12,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:12,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:12,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:12,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-28 01:07:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:12,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-28 01:07:12,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:12,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-28 01:07:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:12,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 01:07:12,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:12,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 01:07:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:12,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-28 01:07:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:12,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-28 01:07:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-28 01:07:12,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:12,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108713290] [2021-12-28 01:07:12,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108713290] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:12,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:12,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:07:12,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50893484] [2021-12-28 01:07:12,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:12,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:12,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:12,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:12,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:07:12,380 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) [2021-12-28 01:07:12,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:12,980 INFO L93 Difference]: Finished difference Result 9003 states and 12067 transitions. [2021-12-28 01:07:12,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:07:12,981 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 [2021-12-28 01:07:12,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:12,997 INFO L225 Difference]: With dead ends: 9003 [2021-12-28 01:07:12,998 INFO L226 Difference]: Without dead ends: 4802 [2021-12-28 01:07:13,008 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 [2021-12-28 01:07:13,009 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 369 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:13,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 882 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:13,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4802 states. [2021-12-28 01:07:13,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4802 to 3865. [2021-12-28 01:07:13,403 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) [2021-12-28 01:07:13,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3865 states to 3865 states and 5091 transitions. [2021-12-28 01:07:13,413 INFO L78 Accepts]: Start accepts. Automaton has 3865 states and 5091 transitions. Word has length 117 [2021-12-28 01:07:13,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:13,414 INFO L470 AbstractCegarLoop]: Abstraction has 3865 states and 5091 transitions. [2021-12-28 01:07:13,414 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) [2021-12-28 01:07:13,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3865 states and 5091 transitions. [2021-12-28 01:07:13,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-28 01:07:13,416 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:13,416 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] [2021-12-28 01:07:13,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-28 01:07:13,416 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:13,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:13,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1465420109, now seen corresponding path program 1 times [2021-12-28 01:07:13,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:13,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989245496] [2021-12-28 01:07:13,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:13,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:13,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:13,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 01:07:13,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:13,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-28 01:07:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:13,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 01:07:13,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:13,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-28 01:07:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:13,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 01:07:13,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:13,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-28 01:07:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:13,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-28 01:07:13,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:13,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-28 01:07:13,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:13,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989245496] [2021-12-28 01:07:13,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989245496] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:13,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:13,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:07:13,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292924128] [2021-12-28 01:07:13,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:13,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:07:13,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:13,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:07:13,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:07:13,462 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) [2021-12-28 01:07:14,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:14,028 INFO L93 Difference]: Finished difference Result 8503 states and 11497 transitions. [2021-12-28 01:07:14,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:07:14,029 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 [2021-12-28 01:07:14,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:14,044 INFO L225 Difference]: With dead ends: 8503 [2021-12-28 01:07:14,044 INFO L226 Difference]: Without dead ends: 4851 [2021-12-28 01:07:14,051 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 [2021-12-28 01:07:14,051 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 151 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:14,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 680 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:07:14,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4851 states. [2021-12-28 01:07:14,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4851 to 3875. [2021-12-28 01:07:14,371 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) [2021-12-28 01:07:14,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 5101 transitions. [2021-12-28 01:07:14,382 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 5101 transitions. Word has length 118 [2021-12-28 01:07:14,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:14,383 INFO L470 AbstractCegarLoop]: Abstraction has 3875 states and 5101 transitions. [2021-12-28 01:07:14,383 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) [2021-12-28 01:07:14,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 5101 transitions. [2021-12-28 01:07:14,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-28 01:07:14,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:14,385 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] [2021-12-28 01:07:14,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-28 01:07:14,385 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:14,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:14,386 INFO L85 PathProgramCache]: Analyzing trace with hash -132784146, now seen corresponding path program 1 times [2021-12-28 01:07:14,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:14,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962160284] [2021-12-28 01:07:14,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:14,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:14,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 01:07:14,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-28 01:07:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 01:07:14,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-28 01:07:14,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 01:07:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-28 01:07:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-28 01:07:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,456 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-28 01:07:14,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:14,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962160284] [2021-12-28 01:07:14,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962160284] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:14,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:14,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:07:14,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105008635] [2021-12-28 01:07:14,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:14,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:14,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:14,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:14,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:07:14,458 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) [2021-12-28 01:07:14,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:14,875 INFO L93 Difference]: Finished difference Result 8451 states and 11414 transitions. [2021-12-28 01:07:14,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:07:14,876 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 [2021-12-28 01:07:14,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:14,892 INFO L225 Difference]: With dead ends: 8451 [2021-12-28 01:07:14,892 INFO L226 Difference]: Without dead ends: 4722 [2021-12-28 01:07:14,902 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 [2021-12-28 01:07:14,903 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 284 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:14,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 913 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:14,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4722 states. [2021-12-28 01:07:15,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4722 to 2925. [2021-12-28 01:07:15,223 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) [2021-12-28 01:07:15,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2925 states to 2925 states and 3834 transitions. [2021-12-28 01:07:15,231 INFO L78 Accepts]: Start accepts. Automaton has 2925 states and 3834 transitions. Word has length 118 [2021-12-28 01:07:15,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:15,231 INFO L470 AbstractCegarLoop]: Abstraction has 2925 states and 3834 transitions. [2021-12-28 01:07:15,232 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) [2021-12-28 01:07:15,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2925 states and 3834 transitions. [2021-12-28 01:07:15,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-28 01:07:15,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:15,238 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] [2021-12-28 01:07:15,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-28 01:07:15,239 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:15,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:15,239 INFO L85 PathProgramCache]: Analyzing trace with hash -664741411, now seen corresponding path program 1 times [2021-12-28 01:07:15,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:15,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62533887] [2021-12-28 01:07:15,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:15,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 01:07:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-28 01:07:15,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 01:07:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 01:07:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 01:07:15,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-28 01:07:15,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-28 01:07:15,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 01:07:15,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-28 01:07:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-28 01:07:15,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-28 01:07:15,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-12-28 01:07:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-28 01:07:15,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,424 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 16 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-28 01:07:15,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:15,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62533887] [2021-12-28 01:07:15,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62533887] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:07:15,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256866055] [2021-12-28 01:07:15,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:15,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:07:15,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:07:15,427 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 01:07:15,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 01:07:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-28 01:07:15,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:07:16,101 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 77 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-28 01:07:16,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:07:16,472 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-28 01:07:16,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256866055] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:07:16,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:07:16,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2021-12-28 01:07:16,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875027591] [2021-12-28 01:07:16,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:07:16,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 01:07:16,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:16,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 01:07:16,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-28 01:07:16,476 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) [2021-12-28 01:07:20,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:20,018 INFO L93 Difference]: Finished difference Result 9990 states and 13988 transitions. [2021-12-28 01:07:20,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-28 01:07:20,018 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 [2021-12-28 01:07:20,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:20,044 INFO L225 Difference]: With dead ends: 9990 [2021-12-28 01:07:20,044 INFO L226 Difference]: Without dead ends: 7352 [2021-12-28 01:07:20,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 402 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=749, Invalid=3411, Unknown=0, NotChecked=0, Total=4160 [2021-12-28 01:07:20,054 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 4455 mSDsluCounter, 2937 mSDsCounter, 0 mSdLazyCounter, 2038 mSolverCounterSat, 1308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4455 SdHoareTripleChecker+Valid, 3273 SdHoareTripleChecker+Invalid, 3346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1308 IncrementalHoareTripleChecker+Valid, 2038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:20,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4455 Valid, 3273 Invalid, 3346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1308 Valid, 2038 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-28 01:07:20,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7352 states. [2021-12-28 01:07:20,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7352 to 3449. [2021-12-28 01:07:20,589 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) [2021-12-28 01:07:20,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 4495 transitions. [2021-12-28 01:07:20,597 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 4495 transitions. Word has length 185 [2021-12-28 01:07:20,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:20,598 INFO L470 AbstractCegarLoop]: Abstraction has 3449 states and 4495 transitions. [2021-12-28 01:07:20,598 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) [2021-12-28 01:07:20,598 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 4495 transitions. [2021-12-28 01:07:20,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-12-28 01:07:20,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:20,603 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] [2021-12-28 01:07:20,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 01:07:20,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-28 01:07:20,820 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:20,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:20,820 INFO L85 PathProgramCache]: Analyzing trace with hash 782511274, now seen corresponding path program 1 times [2021-12-28 01:07:20,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:20,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271161291] [2021-12-28 01:07:20,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:20,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:20,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:20,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 01:07:20,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-28 01:07:20,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 01:07:20,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 01:07:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 01:07:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-28 01:07:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-28 01:07:20,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-28 01:07:20,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-28 01:07:20,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-28 01:07:20,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-28 01:07:20,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-12-28 01:07:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-28 01:07:21,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-12-28 01:07:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,019 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-28 01:07:21,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:21,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271161291] [2021-12-28 01:07:21,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271161291] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:07:21,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432504302] [2021-12-28 01:07:21,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:21,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:07:21,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:07:21,021 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 01:07:21,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 01:07:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-28 01:07:21,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:07:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 53 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-28 01:07:21,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:07:22,058 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-28 01:07:22,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432504302] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:07:22,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:07:22,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2021-12-28 01:07:22,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8486433] [2021-12-28 01:07:22,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:07:22,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-28 01:07:22,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:22,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-28 01:07:22,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-12-28 01:07:22,061 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) [2021-12-28 01:07:30,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:30,551 INFO L93 Difference]: Finished difference Result 17499 states and 23924 transitions. [2021-12-28 01:07:30,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-12-28 01:07:30,551 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 [2021-12-28 01:07:30,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:30,596 INFO L225 Difference]: With dead ends: 17499 [2021-12-28 01:07:30,596 INFO L226 Difference]: Without dead ends: 14346 [2021-12-28 01:07:30,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 474 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5045 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1835, Invalid=12207, Unknown=0, NotChecked=0, Total=14042 [2021-12-28 01:07:30,610 INFO L933 BasicCegarLoop]: 1822 mSDtfsCounter, 7160 mSDsluCounter, 13743 mSDsCounter, 0 mSdLazyCounter, 5454 mSolverCounterSat, 4426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7160 SdHoareTripleChecker+Valid, 15565 SdHoareTripleChecker+Invalid, 9880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4426 IncrementalHoareTripleChecker+Valid, 5454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:30,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7160 Valid, 15565 Invalid, 9880 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4426 Valid, 5454 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-12-28 01:07:30,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14346 states. [2021-12-28 01:07:31,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14346 to 6315. [2021-12-28 01:07:31,565 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) [2021-12-28 01:07:31,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6315 states to 6315 states and 8241 transitions. [2021-12-28 01:07:31,583 INFO L78 Accepts]: Start accepts. Automaton has 6315 states and 8241 transitions. Word has length 193 [2021-12-28 01:07:31,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:31,584 INFO L470 AbstractCegarLoop]: Abstraction has 6315 states and 8241 transitions. [2021-12-28 01:07:31,584 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) [2021-12-28 01:07:31,585 INFO L276 IsEmpty]: Start isEmpty. Operand 6315 states and 8241 transitions. [2021-12-28 01:07:31,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-28 01:07:31,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:31,595 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] [2021-12-28 01:07:31,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 01:07:31,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-28 01:07:31,809 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:31,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:31,810 INFO L85 PathProgramCache]: Analyzing trace with hash -579946063, now seen corresponding path program 1 times [2021-12-28 01:07:31,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:31,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915943636] [2021-12-28 01:07:31,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:31,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 01:07:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 01:07:31,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-28 01:07:31,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 01:07:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-28 01:07:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-28 01:07:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-28 01:07:31,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-28 01:07:31,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-28 01:07:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-12-28 01:07:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-28 01:07:31,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-28 01:07:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-28 01:07:31,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-28 01:07:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,921 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-28 01:07:31,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:31,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915943636] [2021-12-28 01:07:31,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915943636] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:31,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:31,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:07:31,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530433427] [2021-12-28 01:07:31,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:31,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:07:31,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:31,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:07:31,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:07:31,923 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) [2021-12-28 01:07:34,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:34,225 INFO L93 Difference]: Finished difference Result 21323 states and 28571 transitions. [2021-12-28 01:07:34,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 01:07:34,225 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 [2021-12-28 01:07:34,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:34,278 INFO L225 Difference]: With dead ends: 21323 [2021-12-28 01:07:34,278 INFO L226 Difference]: Without dead ends: 15366 [2021-12-28 01:07:34,295 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 [2021-12-28 01:07:34,296 INFO L933 BasicCegarLoop]: 572 mSDtfsCounter, 811 mSDsluCounter, 2510 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 3082 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:34,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [830 Valid, 3082 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:07:34,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15366 states. [2021-12-28 01:07:35,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15366 to 8157. [2021-12-28 01:07:35,353 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) [2021-12-28 01:07:35,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8157 states to 8157 states and 10655 transitions. [2021-12-28 01:07:35,376 INFO L78 Accepts]: Start accepts. Automaton has 8157 states and 10655 transitions. Word has length 195 [2021-12-28 01:07:35,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:35,377 INFO L470 AbstractCegarLoop]: Abstraction has 8157 states and 10655 transitions. [2021-12-28 01:07:35,378 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) [2021-12-28 01:07:35,378 INFO L276 IsEmpty]: Start isEmpty. Operand 8157 states and 10655 transitions. [2021-12-28 01:07:35,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-28 01:07:35,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:35,391 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] [2021-12-28 01:07:35,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-28 01:07:35,391 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:35,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:35,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1014240118, now seen corresponding path program 1 times [2021-12-28 01:07:35,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:35,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254916021] [2021-12-28 01:07:35,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:35,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:35,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 01:07:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 01:07:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-28 01:07:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 01:07:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-28 01:07:35,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-28 01:07:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-28 01:07:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-28 01:07:35,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-28 01:07:35,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-28 01:07:35,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-28 01:07:35,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-12-28 01:07:35,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-12-28 01:07:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2021-12-28 01:07:35,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,560 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-28 01:07:35,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:35,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254916021] [2021-12-28 01:07:35,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254916021] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:07:35,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645112468] [2021-12-28 01:07:35,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:35,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:07:35,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:07:35,562 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 01:07:35,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 01:07:35,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 01:07:35,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:07:36,080 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 49 proven. 6 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-28 01:07:36,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:07:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-28 01:07:36,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645112468] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-28 01:07:36,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-28 01:07:36,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 7] total 14 [2021-12-28 01:07:36,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726924009] [2021-12-28 01:07:36,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:36,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:07:36,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:36,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:07:36,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-28 01:07:36,430 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) [2021-12-28 01:07:37,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:37,164 INFO L93 Difference]: Finished difference Result 13437 states and 17606 transitions. [2021-12-28 01:07:37,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:07:37,165 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 [2021-12-28 01:07:37,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:37,182 INFO L225 Difference]: With dead ends: 13437 [2021-12-28 01:07:37,182 INFO L226 Difference]: Without dead ends: 5486 [2021-12-28 01:07:37,193 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 [2021-12-28 01:07:37,194 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 2 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:37,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1156 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:37,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5486 states. [2021-12-28 01:07:37,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5486 to 5486. [2021-12-28 01:07:37,863 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) [2021-12-28 01:07:37,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5486 states to 5486 states and 7171 transitions. [2021-12-28 01:07:37,879 INFO L78 Accepts]: Start accepts. Automaton has 5486 states and 7171 transitions. Word has length 197 [2021-12-28 01:07:37,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:37,880 INFO L470 AbstractCegarLoop]: Abstraction has 5486 states and 7171 transitions. [2021-12-28 01:07:37,880 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) [2021-12-28 01:07:37,880 INFO L276 IsEmpty]: Start isEmpty. Operand 5486 states and 7171 transitions. [2021-12-28 01:07:37,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-28 01:07:37,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:37,891 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] [2021-12-28 01:07:37,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 01:07:38,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:07:38,118 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:38,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:38,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1806123049, now seen corresponding path program 1 times [2021-12-28 01:07:38,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:38,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254438842] [2021-12-28 01:07:38,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:38,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:38,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:38,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 01:07:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:38,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 01:07:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:38,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 01:07:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:38,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-28 01:07:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:38,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 01:07:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:38,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-28 01:07:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:38,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-28 01:07:38,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:38,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-28 01:07:38,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:38,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-28 01:07:38,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:38,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-28 01:07:38,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:38,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-28 01:07:38,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:38,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-28 01:07:38,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:38,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-12-28 01:07:38,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:38,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-12-28 01:07:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:38,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2021-12-28 01:07:38,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-28 01:07:38,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:38,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254438842] [2021-12-28 01:07:38,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254438842] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:07:38,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21676370] [2021-12-28 01:07:38,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:38,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:07:38,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:07:38,325 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 01:07:38,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 01:07:38,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:38,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-28 01:07:38,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:07:39,235 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 71 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-28 01:07:39,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:07:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-28 01:07:39,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21676370] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:07:39,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:07:39,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 24 [2021-12-28 01:07:39,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985306298] [2021-12-28 01:07:39,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:07:39,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-28 01:07:39,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:39,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-28 01:07:39,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-12-28 01:07:39,726 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)