./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 c3fed411 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-tmp.no-commuhash-c3fed41 [2021-12-16 01:09:56,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 01:09:56,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 01:09:56,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 01:09:56,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 01:09:56,276 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 01:09:56,278 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 01:09:56,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 01:09:56,283 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 01:09:56,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 01:09:56,285 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 01:09:56,286 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 01:09:56,286 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 01:09:56,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 01:09:56,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 01:09:56,289 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 01:09:56,290 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 01:09:56,292 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 01:09:56,293 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 01:09:56,294 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 01:09:56,295 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 01:09:56,298 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 01:09:56,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 01:09:56,299 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 01:09:56,301 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 01:09:56,305 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 01:09:56,305 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 01:09:56,306 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 01:09:56,307 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 01:09:56,307 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 01:09:56,308 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 01:09:56,308 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 01:09:56,309 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 01:09:56,310 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 01:09:56,311 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 01:09:56,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 01:09:56,312 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 01:09:56,312 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 01:09:56,312 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 01:09:56,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 01:09:56,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 01:09:56,314 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 01:09:56,333 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 01:09:56,334 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 01:09:56,334 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 01:09:56,334 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 01:09:56,335 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 01:09:56,335 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 01:09:56,336 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 01:09:56,336 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 01:09:56,336 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 01:09:56,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 01:09:56,337 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 01:09:56,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 01:09:56,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 01:09:56,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 01:09:56,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 01:09:56,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 01:09:56,338 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 01:09:56,338 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 01:09:56,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 01:09:56,338 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 01:09:56,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 01:09:56,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 01:09:56,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 01:09:56,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 01:09:56,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 01:09:56,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 01:09:56,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 01:09:56,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 01:09:56,340 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 01:09:56,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 01:09:56,340 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 01:09:56,340 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 01:09:56,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 01:09:56,340 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 01:09:56,341 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5d72e5e7abaa750c1c0009f2e3addca35915e1b949637f5a49ed633aadc3fe53 [2021-12-16 01:09:56,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 01:09:56,573 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 01:09:56,575 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 01:09:56,576 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 01:09:56,577 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 01:09:56,577 INFO L432 ainManager$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 [2021-12-16 01:09:56,622 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5b077999/a76e60a61f124a23b523896ac2534e6c/FLAG934a168a3 [2021-12-16 01:09:57,071 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 01:09:57,071 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c [2021-12-16 01:09:57,081 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5b077999/a76e60a61f124a23b523896ac2534e6c/FLAG934a168a3 [2021-12-16 01:09:57,094 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5b077999/a76e60a61f124a23b523896ac2534e6c [2021-12-16 01:09:57,097 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 01:09:57,098 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 01:09:57,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 01:09:57,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 01:09:57,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 01:09:57,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 01:09:57" (1/1) ... [2021-12-16 01:09:57,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36f26a25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:09:57, skipping insertion in model container [2021-12-16 01:09:57,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 01:09:57" (1/1) ... [2021-12-16 01:09:57,110 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 01:09:57,144 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 01:09:57,361 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] [2021-12-16 01:09:57,365 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 01:09:57,374 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 01:09:57,437 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] [2021-12-16 01:09:57,439 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 01:09:57,448 INFO L208 MainTranslator]: Completed translation [2021-12-16 01:09:57,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:09:57 WrapperNode [2021-12-16 01:09:57,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 01:09:57,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 01:09:57,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 01:09:57,450 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 01:09:57,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:09:57" (1/1) ... [2021-12-16 01:09:57,464 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:09:57" (1/1) ... [2021-12-16 01:09:57,489 INFO L137 Inliner]: procedures = 32, calls = 48, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 535 [2021-12-16 01:09:57,489 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 01:09:57,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 01:09:57,490 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 01:09:57,490 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 01:09:57,496 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:09:57" (1/1) ... [2021-12-16 01:09:57,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:09:57" (1/1) ... [2021-12-16 01:09:57,500 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:09:57" (1/1) ... [2021-12-16 01:09:57,500 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:09:57" (1/1) ... [2021-12-16 01:09:57,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:09:57" (1/1) ... [2021-12-16 01:09:57,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:09:57" (1/1) ... [2021-12-16 01:09:57,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:09:57" (1/1) ... [2021-12-16 01:09:57,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 01:09:57,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 01:09:57,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 01:09:57,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 01:09:57,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:09:57" (1/1) ... [2021-12-16 01:09:57,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 01:09:57,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:09:57,578 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) [2021-12-16 01:09:57,587 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 [2021-12-16 01:09:57,620 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2021-12-16 01:09:57,621 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2021-12-16 01:09:57,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 01:09:57,621 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2021-12-16 01:09:57,622 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2021-12-16 01:09:57,622 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-12-16 01:09:57,622 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2021-12-16 01:09:57,622 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2021-12-16 01:09:57,625 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2021-12-16 01:09:57,625 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-16 01:09:57,625 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-16 01:09:57,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 01:09:57,626 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2021-12-16 01:09:57,626 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2021-12-16 01:09:57,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 01:09:57,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 01:09:57,627 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2021-12-16 01:09:57,627 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2021-12-16 01:09:57,716 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 01:09:57,721 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 01:09:58,178 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 01:09:58,185 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 01:09:58,185 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-16 01:09:58,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 01:09:58 BoogieIcfgContainer [2021-12-16 01:09:58,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 01:09:58,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 01:09:58,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 01:09:58,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 01:09:58,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 01:09:57" (1/3) ... [2021-12-16 01:09:58,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ca25ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 01:09:58, skipping insertion in model container [2021-12-16 01:09:58,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:09:57" (2/3) ... [2021-12-16 01:09:58,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ca25ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 01:09:58, skipping insertion in model container [2021-12-16 01:09:58,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 01:09:58" (3/3) ... [2021-12-16 01:09:58,203 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c [2021-12-16 01:09:58,207 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 01:09:58,208 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 01:09:58,256 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 01:09:58,262 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 [2021-12-16 01:09:58,263 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 01:09:58,282 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) [2021-12-16 01:09:58,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-16 01:09:58,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:09:58,287 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] [2021-12-16 01:09:58,288 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:09:58,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:09:58,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1527920627, now seen corresponding path program 1 times [2021-12-16 01:09:58,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:09:58,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731081195] [2021-12-16 01:09:58,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:09:58,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:09:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:09:58,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:09:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:09:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:09:58,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:09:58,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731081195] [2021-12-16 01:09:58,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731081195] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:09:58,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:09:58,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 01:09:58,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023454475] [2021-12-16 01:09:58,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:09:58,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 01:09:58,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:09:58,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 01:09:58,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 01:09:58,466 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) [2021-12-16 01:09:58,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:09:58,501 INFO L93 Difference]: Finished difference Result 392 states and 637 transitions. [2021-12-16 01:09:58,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 01:09:58,503 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 [2021-12-16 01:09:58,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:09:58,509 INFO L225 Difference]: With dead ends: 392 [2021-12-16 01:09:58,511 INFO L226 Difference]: Without dead ends: 202 [2021-12-16 01:09:58,514 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 [2021-12-16 01:09:58,516 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 [2021-12-16 01:09:58,517 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] [2021-12-16 01:09:58,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-16 01:09:58,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2021-12-16 01:09:58,557 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) [2021-12-16 01:09:58,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 307 transitions. [2021-12-16 01:09:58,561 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 307 transitions. Word has length 44 [2021-12-16 01:09:58,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:09:58,562 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 307 transitions. [2021-12-16 01:09:58,562 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) [2021-12-16 01:09:58,562 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 307 transitions. [2021-12-16 01:09:58,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-16 01:09:58,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:09:58,564 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] [2021-12-16 01:09:58,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 01:09:58,565 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:09:58,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:09:58,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1536686131, now seen corresponding path program 1 times [2021-12-16 01:09:58,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:09:58,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047453220] [2021-12-16 01:09:58,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:09:58,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:09:58,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:09:58,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:09:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:09:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:09:58,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:09:58,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047453220] [2021-12-16 01:09:58,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047453220] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:09:58,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:09:58,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 01:09:58,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098663643] [2021-12-16 01:09:58,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:09:58,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 01:09:58,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:09:58,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 01:09:58,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 01:09:58,664 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) [2021-12-16 01:09:58,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:09:58,760 INFO L93 Difference]: Finished difference Result 390 states and 588 transitions. [2021-12-16 01:09:58,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 01:09:58,761 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 [2021-12-16 01:09:58,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:09:58,768 INFO L225 Difference]: With dead ends: 390 [2021-12-16 01:09:58,770 INFO L226 Difference]: Without dead ends: 202 [2021-12-16 01:09:58,771 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 [2021-12-16 01:09:58,774 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 [2021-12-16 01:09:58,775 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] [2021-12-16 01:09:58,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-16 01:09:58,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2021-12-16 01:09:58,796 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) [2021-12-16 01:09:58,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 295 transitions. [2021-12-16 01:09:58,804 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 295 transitions. Word has length 44 [2021-12-16 01:09:58,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:09:58,805 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 295 transitions. [2021-12-16 01:09:58,805 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) [2021-12-16 01:09:58,805 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 295 transitions. [2021-12-16 01:09:58,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-16 01:09:58,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:09:58,808 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] [2021-12-16 01:09:58,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 01:09:58,808 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:09:58,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:09:58,809 INFO L85 PathProgramCache]: Analyzing trace with hash 2082780786, now seen corresponding path program 1 times [2021-12-16 01:09:58,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:09:58,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633530162] [2021-12-16 01:09:58,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:09:58,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:09:58,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:09:58,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:09:58,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:09:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:09:58,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:09:58,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633530162] [2021-12-16 01:09:58,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633530162] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:09:58,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:09:58,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 01:09:58,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990047929] [2021-12-16 01:09:58,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:09:58,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 01:09:58,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:09:58,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 01:09:58,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 01:09:58,991 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) [2021-12-16 01:09:59,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:09:59,024 INFO L93 Difference]: Finished difference Result 391 states and 580 transitions. [2021-12-16 01:09:59,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 01:09:59,024 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 [2021-12-16 01:09:59,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:09:59,026 INFO L225 Difference]: With dead ends: 391 [2021-12-16 01:09:59,026 INFO L226 Difference]: Without dead ends: 206 [2021-12-16 01:09:59,027 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 [2021-12-16 01:09:59,027 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 [2021-12-16 01:09:59,028 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] [2021-12-16 01:09:59,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-12-16 01:09:59,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2021-12-16 01:09:59,039 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) [2021-12-16 01:09:59,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 298 transitions. [2021-12-16 01:09:59,040 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 298 transitions. Word has length 55 [2021-12-16 01:09:59,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:09:59,041 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 298 transitions. [2021-12-16 01:09:59,041 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) [2021-12-16 01:09:59,041 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 298 transitions. [2021-12-16 01:09:59,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-16 01:09:59,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:09:59,045 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] [2021-12-16 01:09:59,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 01:09:59,045 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:09:59,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:09:59,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1990587108, now seen corresponding path program 1 times [2021-12-16 01:09:59,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:09:59,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289629507] [2021-12-16 01:09:59,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:09:59,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:09:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:09:59,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:09:59,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:09:59,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 01:09:59,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:09:59,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 01:09:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:09:59,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 01:09:59,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:09:59,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289629507] [2021-12-16 01:09:59,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289629507] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:09:59,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:09:59,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:09:59,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567015794] [2021-12-16 01:09:59,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:09:59,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:09:59,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:09:59,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:09:59,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:09:59,127 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) [2021-12-16 01:09:59,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:09:59,174 INFO L93 Difference]: Finished difference Result 561 states and 823 transitions. [2021-12-16 01:09:59,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:09:59,175 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 [2021-12-16 01:09:59,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:09:59,178 INFO L225 Difference]: With dead ends: 561 [2021-12-16 01:09:59,179 INFO L226 Difference]: Without dead ends: 372 [2021-12-16 01:09:59,180 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 [2021-12-16 01:09:59,185 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 [2021-12-16 01:09:59,187 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] [2021-12-16 01:09:59,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-12-16 01:09:59,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 363. [2021-12-16 01:09:59,211 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) [2021-12-16 01:09:59,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 532 transitions. [2021-12-16 01:09:59,215 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 532 transitions. Word has length 71 [2021-12-16 01:09:59,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:09:59,216 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 532 transitions. [2021-12-16 01:09:59,216 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) [2021-12-16 01:09:59,216 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 532 transitions. [2021-12-16 01:09:59,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-16 01:09:59,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:09:59,219 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] [2021-12-16 01:09:59,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 01:09:59,220 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:09:59,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:09:59,221 INFO L85 PathProgramCache]: Analyzing trace with hash 687571372, now seen corresponding path program 1 times [2021-12-16 01:09:59,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:09:59,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799655301] [2021-12-16 01:09:59,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:09:59,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:09:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:09:59,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:09:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:09:59,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 01:09:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:09:59,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-16 01:09:59,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:09:59,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 01:09:59,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:09:59,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799655301] [2021-12-16 01:09:59,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799655301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:09:59,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:09:59,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:09:59,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933695988] [2021-12-16 01:09:59,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:09:59,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:09:59,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:09:59,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:09:59,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:09:59,320 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) [2021-12-16 01:09:59,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:09:59,371 INFO L93 Difference]: Finished difference Result 1006 states and 1489 transitions. [2021-12-16 01:09:59,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:09:59,372 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 [2021-12-16 01:09:59,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:09:59,376 INFO L225 Difference]: With dead ends: 1006 [2021-12-16 01:09:59,376 INFO L226 Difference]: Without dead ends: 660 [2021-12-16 01:09:59,377 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 [2021-12-16 01:09:59,378 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 [2021-12-16 01:09:59,378 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] [2021-12-16 01:09:59,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-12-16 01:09:59,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 643. [2021-12-16 01:09:59,422 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) [2021-12-16 01:09:59,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 955 transitions. [2021-12-16 01:09:59,428 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 955 transitions. Word has length 72 [2021-12-16 01:09:59,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:09:59,428 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 955 transitions. [2021-12-16 01:09:59,428 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) [2021-12-16 01:09:59,429 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 955 transitions. [2021-12-16 01:09:59,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-16 01:09:59,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:09:59,430 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] [2021-12-16 01:09:59,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 01:09:59,430 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:09:59,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:09:59,431 INFO L85 PathProgramCache]: Analyzing trace with hash -592292306, now seen corresponding path program 1 times [2021-12-16 01:09:59,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:09:59,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736735361] [2021-12-16 01:09:59,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:09:59,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:09:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:09:59,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:09:59,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:09:59,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 01:09:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:09:59,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-16 01:09:59,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:09:59,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 01:09:59,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:09:59,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736735361] [2021-12-16 01:09:59,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736735361] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:09:59,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:09:59,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 01:09:59,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200751153] [2021-12-16 01:09:59,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:09:59,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:09:59,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:09:59,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:09:59,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:09:59,527 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) [2021-12-16 01:09:59,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:09:59,784 INFO L93 Difference]: Finished difference Result 1799 states and 2717 transitions. [2021-12-16 01:09:59,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 01:09:59,785 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 [2021-12-16 01:09:59,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:09:59,792 INFO L225 Difference]: With dead ends: 1799 [2021-12-16 01:09:59,792 INFO L226 Difference]: Without dead ends: 1173 [2021-12-16 01:09:59,794 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 [2021-12-16 01:09:59,795 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 783 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2021-12-16 01:09:59,795 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] [2021-12-16 01:09:59,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-12-16 01:09:59,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 768. [2021-12-16 01:09:59,846 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) [2021-12-16 01:09:59,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1119 transitions. [2021-12-16 01:09:59,850 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1119 transitions. Word has length 72 [2021-12-16 01:09:59,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:09:59,850 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 1119 transitions. [2021-12-16 01:09:59,850 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) [2021-12-16 01:09:59,850 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1119 transitions. [2021-12-16 01:09:59,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-16 01:09:59,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:09:59,851 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] [2021-12-16 01:09:59,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 01:09:59,852 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:09:59,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:09:59,852 INFO L85 PathProgramCache]: Analyzing trace with hash 9157699, now seen corresponding path program 1 times [2021-12-16 01:09:59,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:09:59,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633929632] [2021-12-16 01:09:59,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:09:59,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:09:59,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:09:59,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:09:59,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:09:59,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 01:09:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:09:59,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-16 01:09:59,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:09:59,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 01:09:59,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:09:59,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633929632] [2021-12-16 01:09:59,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633929632] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:09:59,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:09:59,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 01:09:59,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961381362] [2021-12-16 01:09:59,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:09:59,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:09:59,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:09:59,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:09:59,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:09:59,901 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) [2021-12-16 01:10:00,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:00,142 INFO L93 Difference]: Finished difference Result 1803 states and 2717 transitions. [2021-12-16 01:10:00,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 01:10:00,142 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 [2021-12-16 01:10:00,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:00,147 INFO L225 Difference]: With dead ends: 1803 [2021-12-16 01:10:00,147 INFO L226 Difference]: Without dead ends: 1177 [2021-12-16 01:10:00,149 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 [2021-12-16 01:10:00,149 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 780 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2021-12-16 01:10:00,150 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] [2021-12-16 01:10:00,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-12-16 01:10:00,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 776. [2021-12-16 01:10:00,179 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) [2021-12-16 01:10:00,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1127 transitions. [2021-12-16 01:10:00,182 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1127 transitions. Word has length 73 [2021-12-16 01:10:00,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:00,183 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 1127 transitions. [2021-12-16 01:10:00,183 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) [2021-12-16 01:10:00,183 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1127 transitions. [2021-12-16 01:10:00,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-16 01:10:00,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:00,184 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] [2021-12-16 01:10:00,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 01:10:00,184 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:00,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:00,185 INFO L85 PathProgramCache]: Analyzing trace with hash 341297525, now seen corresponding path program 1 times [2021-12-16 01:10:00,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:00,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733812036] [2021-12-16 01:10:00,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:00,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:00,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:00,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:00,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:00,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 01:10:00,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:00,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-16 01:10:00,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 01:10:00,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:00,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733812036] [2021-12-16 01:10:00,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733812036] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:10:00,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:10:00,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 01:10:00,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759621912] [2021-12-16 01:10:00,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:10:00,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 01:10:00,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:00,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 01:10:00,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 01:10:00,253 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) [2021-12-16 01:10:00,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:00,476 INFO L93 Difference]: Finished difference Result 1803 states and 2709 transitions. [2021-12-16 01:10:00,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 01:10:00,476 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 [2021-12-16 01:10:00,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:00,481 INFO L225 Difference]: With dead ends: 1803 [2021-12-16 01:10:00,481 INFO L226 Difference]: Without dead ends: 1177 [2021-12-16 01:10:00,482 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 [2021-12-16 01:10:00,483 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 237 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2021-12-16 01:10:00,483 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] [2021-12-16 01:10:00,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-12-16 01:10:00,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 776. [2021-12-16 01:10:00,513 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) [2021-12-16 01:10:00,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1123 transitions. [2021-12-16 01:10:00,516 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1123 transitions. Word has length 75 [2021-12-16 01:10:00,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:00,517 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 1123 transitions. [2021-12-16 01:10:00,517 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) [2021-12-16 01:10:00,517 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1123 transitions. [2021-12-16 01:10:00,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-16 01:10:00,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:00,518 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] [2021-12-16 01:10:00,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 01:10:00,518 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:00,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:00,519 INFO L85 PathProgramCache]: Analyzing trace with hash 662931196, now seen corresponding path program 1 times [2021-12-16 01:10:00,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:00,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640742608] [2021-12-16 01:10:00,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:00,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:00,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:00,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:00,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:00,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 01:10:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:00,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 01:10:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:00,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 01:10:00,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:00,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640742608] [2021-12-16 01:10:00,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640742608] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:10:00,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:10:00,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 01:10:00,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84468220] [2021-12-16 01:10:00,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:10:00,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 01:10:00,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:00,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 01:10:00,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 01:10:00,577 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) [2021-12-16 01:10:00,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:00,613 INFO L93 Difference]: Finished difference Result 1422 states and 2088 transitions. [2021-12-16 01:10:00,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 01:10:00,613 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 [2021-12-16 01:10:00,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:00,616 INFO L225 Difference]: With dead ends: 1422 [2021-12-16 01:10:00,616 INFO L226 Difference]: Without dead ends: 796 [2021-12-16 01:10:00,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:10:00,618 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 [2021-12-16 01:10:00,618 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] [2021-12-16 01:10:00,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-12-16 01:10:00,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 796. [2021-12-16 01:10:00,648 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) [2021-12-16 01:10:00,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1139 transitions. [2021-12-16 01:10:00,651 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1139 transitions. Word has length 76 [2021-12-16 01:10:00,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:00,651 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 1139 transitions. [2021-12-16 01:10:00,652 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) [2021-12-16 01:10:00,652 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1139 transitions. [2021-12-16 01:10:00,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-16 01:10:00,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:00,653 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] [2021-12-16 01:10:00,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 01:10:00,653 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:00,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:00,654 INFO L85 PathProgramCache]: Analyzing trace with hash -520002270, now seen corresponding path program 1 times [2021-12-16 01:10:00,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:00,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791691638] [2021-12-16 01:10:00,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:00,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:00,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:00,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:00,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 01:10:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:00,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 01:10:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:00,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 01:10:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 01:10:00,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:00,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791691638] [2021-12-16 01:10:00,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791691638] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:10:00,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:10:00,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 01:10:00,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412197179] [2021-12-16 01:10:00,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:10:00,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 01:10:00,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:00,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 01:10:00,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 01:10:00,751 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) [2021-12-16 01:10:00,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:00,794 INFO L93 Difference]: Finished difference Result 1462 states and 2132 transitions. [2021-12-16 01:10:00,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 01:10:00,795 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 [2021-12-16 01:10:00,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:00,797 INFO L225 Difference]: With dead ends: 1462 [2021-12-16 01:10:00,798 INFO L226 Difference]: Without dead ends: 816 [2021-12-16 01:10:00,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:10:00,799 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 [2021-12-16 01:10:00,800 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] [2021-12-16 01:10:00,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-12-16 01:10:00,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 816. [2021-12-16 01:10:00,824 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) [2021-12-16 01:10:00,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1155 transitions. [2021-12-16 01:10:00,828 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1155 transitions. Word has length 84 [2021-12-16 01:10:00,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:00,828 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 1155 transitions. [2021-12-16 01:10:00,828 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) [2021-12-16 01:10:00,829 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1155 transitions. [2021-12-16 01:10:00,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-16 01:10:00,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:00,830 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] [2021-12-16 01:10:00,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 01:10:00,831 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:00,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:00,831 INFO L85 PathProgramCache]: Analyzing trace with hash -285867028, now seen corresponding path program 1 times [2021-12-16 01:10:00,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:00,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296312532] [2021-12-16 01:10:00,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:00,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:00,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:00,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:00,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 01:10:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:00,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 01:10:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:00,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 01:10:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:00,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 01:10:00,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:00,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 01:10:00,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:00,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296312532] [2021-12-16 01:10:00,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296312532] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:10:00,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:10:00,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 01:10:00,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633720006] [2021-12-16 01:10:00,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:10:00,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 01:10:00,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:00,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 01:10:00,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 01:10:00,886 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) [2021-12-16 01:10:00,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:00,931 INFO L93 Difference]: Finished difference Result 1498 states and 2148 transitions. [2021-12-16 01:10:00,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 01:10:00,932 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 [2021-12-16 01:10:00,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:00,935 INFO L225 Difference]: With dead ends: 1498 [2021-12-16 01:10:00,935 INFO L226 Difference]: Without dead ends: 832 [2021-12-16 01:10:00,936 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 [2021-12-16 01:10:00,937 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 [2021-12-16 01:10:00,937 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] [2021-12-16 01:10:00,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-12-16 01:10:00,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 832. [2021-12-16 01:10:00,961 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) [2021-12-16 01:10:00,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1167 transitions. [2021-12-16 01:10:00,964 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1167 transitions. Word has length 92 [2021-12-16 01:10:00,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:00,964 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 1167 transitions. [2021-12-16 01:10:00,965 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) [2021-12-16 01:10:00,965 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1167 transitions. [2021-12-16 01:10:00,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-16 01:10:00,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:00,966 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] [2021-12-16 01:10:00,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 01:10:00,966 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:00,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:00,967 INFO L85 PathProgramCache]: Analyzing trace with hash 2110592275, now seen corresponding path program 1 times [2021-12-16 01:10:00,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:00,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438848036] [2021-12-16 01:10:00,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:00,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:00,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 01:10:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 01:10:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 01:10:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 01:10:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 01:10:01,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:01,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438848036] [2021-12-16 01:10:01,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438848036] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:10:01,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:10:01,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 01:10:01,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756106980] [2021-12-16 01:10:01,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:10:01,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 01:10:01,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:01,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 01:10:01,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 01:10:01,034 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) [2021-12-16 01:10:01,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:01,092 INFO L93 Difference]: Finished difference Result 1534 states and 2188 transitions. [2021-12-16 01:10:01,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 01:10:01,092 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 [2021-12-16 01:10:01,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:01,095 INFO L225 Difference]: With dead ends: 1534 [2021-12-16 01:10:01,095 INFO L226 Difference]: Without dead ends: 852 [2021-12-16 01:10:01,096 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 [2021-12-16 01:10:01,097 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 [2021-12-16 01:10:01,097 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] [2021-12-16 01:10:01,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-12-16 01:10:01,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 852. [2021-12-16 01:10:01,118 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) [2021-12-16 01:10:01,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1183 transitions. [2021-12-16 01:10:01,121 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1183 transitions. Word has length 92 [2021-12-16 01:10:01,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:01,121 INFO L470 AbstractCegarLoop]: Abstraction has 852 states and 1183 transitions. [2021-12-16 01:10:01,121 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) [2021-12-16 01:10:01,121 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1183 transitions. [2021-12-16 01:10:01,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-16 01:10:01,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:01,123 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] [2021-12-16 01:10:01,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-16 01:10:01,123 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:01,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:01,123 INFO L85 PathProgramCache]: Analyzing trace with hash 483840627, now seen corresponding path program 1 times [2021-12-16 01:10:01,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:01,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716283490] [2021-12-16 01:10:01,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:01,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:01,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 01:10:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 01:10:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 01:10:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 01:10:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-16 01:10:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 01:10:01,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:01,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716283490] [2021-12-16 01:10:01,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716283490] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:10:01,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:10:01,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 01:10:01,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900366767] [2021-12-16 01:10:01,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:10:01,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 01:10:01,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:01,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 01:10:01,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 01:10:01,183 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) [2021-12-16 01:10:01,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:01,227 INFO L93 Difference]: Finished difference Result 1578 states and 2216 transitions. [2021-12-16 01:10:01,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 01:10:01,227 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 [2021-12-16 01:10:01,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:01,230 INFO L225 Difference]: With dead ends: 1578 [2021-12-16 01:10:01,230 INFO L226 Difference]: Without dead ends: 876 [2021-12-16 01:10:01,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:10:01,232 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 [2021-12-16 01:10:01,232 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] [2021-12-16 01:10:01,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2021-12-16 01:10:01,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 876. [2021-12-16 01:10:01,255 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) [2021-12-16 01:10:01,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1203 transitions. [2021-12-16 01:10:01,258 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1203 transitions. Word has length 100 [2021-12-16 01:10:01,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:01,259 INFO L470 AbstractCegarLoop]: Abstraction has 876 states and 1203 transitions. [2021-12-16 01:10:01,259 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) [2021-12-16 01:10:01,259 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1203 transitions. [2021-12-16 01:10:01,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-16 01:10:01,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:01,261 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] [2021-12-16 01:10:01,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-16 01:10:01,261 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:01,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:01,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1857958922, now seen corresponding path program 1 times [2021-12-16 01:10:01,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:01,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15739014] [2021-12-16 01:10:01,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:01,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 01:10:01,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 01:10:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 01:10:01,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 01:10:01,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-16 01:10:01,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-16 01:10:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 01:10:01,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:01,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15739014] [2021-12-16 01:10:01,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15739014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:10:01,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:10:01,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:10:01,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095222751] [2021-12-16 01:10:01,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:10:01,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:10:01,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:01,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:10:01,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:10:01,360 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) [2021-12-16 01:10:01,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:01,556 INFO L93 Difference]: Finished difference Result 2489 states and 3477 transitions. [2021-12-16 01:10:01,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 01:10:01,556 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 [2021-12-16 01:10:01,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:01,562 INFO L225 Difference]: With dead ends: 2489 [2021-12-16 01:10:01,562 INFO L226 Difference]: Without dead ends: 1763 [2021-12-16 01:10:01,564 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 [2021-12-16 01:10:01,564 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 [2021-12-16 01:10:01,564 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] [2021-12-16 01:10:01,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2021-12-16 01:10:01,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1160. [2021-12-16 01:10:01,606 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) [2021-12-16 01:10:01,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1581 transitions. [2021-12-16 01:10:01,609 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1581 transitions. Word has length 103 [2021-12-16 01:10:01,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:01,610 INFO L470 AbstractCegarLoop]: Abstraction has 1160 states and 1581 transitions. [2021-12-16 01:10:01,610 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) [2021-12-16 01:10:01,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1581 transitions. [2021-12-16 01:10:01,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-16 01:10:01,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:01,611 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] [2021-12-16 01:10:01,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-16 01:10:01,611 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:01,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:01,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1544619372, now seen corresponding path program 1 times [2021-12-16 01:10:01,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:01,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811005440] [2021-12-16 01:10:01,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:01,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:01,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 01:10:01,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 01:10:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 01:10:01,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 01:10:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-16 01:10:01,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-16 01:10:01,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 01:10:01,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:01,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811005440] [2021-12-16 01:10:01,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811005440] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:10:01,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:10:01,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 01:10:01,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116268921] [2021-12-16 01:10:01,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:10:01,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 01:10:01,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:01,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 01:10:01,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 01:10:01,665 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) [2021-12-16 01:10:01,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:01,717 INFO L93 Difference]: Finished difference Result 2126 states and 2924 transitions. [2021-12-16 01:10:01,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 01:10:01,718 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 [2021-12-16 01:10:01,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:01,722 INFO L225 Difference]: With dead ends: 2126 [2021-12-16 01:10:01,722 INFO L226 Difference]: Without dead ends: 1184 [2021-12-16 01:10:01,724 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 [2021-12-16 01:10:01,724 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 [2021-12-16 01:10:01,725 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] [2021-12-16 01:10:01,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-12-16 01:10:01,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 1184. [2021-12-16 01:10:01,774 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) [2021-12-16 01:10:01,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1599 transitions. [2021-12-16 01:10:01,778 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1599 transitions. Word has length 107 [2021-12-16 01:10:01,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:01,778 INFO L470 AbstractCegarLoop]: Abstraction has 1184 states and 1599 transitions. [2021-12-16 01:10:01,778 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) [2021-12-16 01:10:01,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1599 transitions. [2021-12-16 01:10:01,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-16 01:10:01,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:01,780 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] [2021-12-16 01:10:01,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-16 01:10:01,780 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:01,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:01,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1746652564, now seen corresponding path program 1 times [2021-12-16 01:10:01,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:01,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848297690] [2021-12-16 01:10:01,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:01,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:01,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 01:10:01,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 01:10:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 01:10:01,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 01:10:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-16 01:10:01,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-16 01:10:01,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 01:10:01,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:01,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848297690] [2021-12-16 01:10:01,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848297690] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:10:01,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:10:01,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 01:10:01,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999958895] [2021-12-16 01:10:01,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:10:01,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 01:10:01,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:01,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 01:10:01,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 01:10:01,856 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) [2021-12-16 01:10:01,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:01,958 INFO L93 Difference]: Finished difference Result 1655 states and 2343 transitions. [2021-12-16 01:10:01,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 01:10:01,959 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 [2021-12-16 01:10:01,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:01,966 INFO L225 Difference]: With dead ends: 1655 [2021-12-16 01:10:01,966 INFO L226 Difference]: Without dead ends: 1653 [2021-12-16 01:10:01,967 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 [2021-12-16 01:10:01,967 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 [2021-12-16 01:10:01,968 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] [2021-12-16 01:10:01,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2021-12-16 01:10:02,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1192. [2021-12-16 01:10:02,013 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) [2021-12-16 01:10:02,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1607 transitions. [2021-12-16 01:10:02,016 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1607 transitions. Word has length 106 [2021-12-16 01:10:02,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:02,016 INFO L470 AbstractCegarLoop]: Abstraction has 1192 states and 1607 transitions. [2021-12-16 01:10:02,016 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) [2021-12-16 01:10:02,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1607 transitions. [2021-12-16 01:10:02,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-16 01:10:02,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:02,018 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] [2021-12-16 01:10:02,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-16 01:10:02,018 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:02,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:02,018 INFO L85 PathProgramCache]: Analyzing trace with hash 285885957, now seen corresponding path program 1 times [2021-12-16 01:10:02,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:02,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787468542] [2021-12-16 01:10:02,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:02,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:02,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:02,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:02,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 01:10:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:02,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 01:10:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:02,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 01:10:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:02,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 01:10:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:02,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-16 01:10:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:02,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-16 01:10:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:02,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 01:10:02,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:02,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787468542] [2021-12-16 01:10:02,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787468542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:10:02,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:10:02,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:10:02,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811027278] [2021-12-16 01:10:02,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:10:02,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:10:02,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:02,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:10:02,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:10:02,091 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) [2021-12-16 01:10:02,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:02,257 INFO L93 Difference]: Finished difference Result 2446 states and 3360 transitions. [2021-12-16 01:10:02,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 01:10:02,258 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 [2021-12-16 01:10:02,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:02,263 INFO L225 Difference]: With dead ends: 2446 [2021-12-16 01:10:02,263 INFO L226 Difference]: Without dead ends: 1554 [2021-12-16 01:10:02,265 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 [2021-12-16 01:10:02,266 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 [2021-12-16 01:10:02,266 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] [2021-12-16 01:10:02,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2021-12-16 01:10:02,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1236. [2021-12-16 01:10:02,315 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) [2021-12-16 01:10:02,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1648 transitions. [2021-12-16 01:10:02,318 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1648 transitions. Word has length 109 [2021-12-16 01:10:02,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:02,319 INFO L470 AbstractCegarLoop]: Abstraction has 1236 states and 1648 transitions. [2021-12-16 01:10:02,319 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) [2021-12-16 01:10:02,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1648 transitions. [2021-12-16 01:10:02,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-16 01:10:02,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:02,320 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] [2021-12-16 01:10:02,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-16 01:10:02,321 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:02,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:02,321 INFO L85 PathProgramCache]: Analyzing trace with hash 641112124, now seen corresponding path program 1 times [2021-12-16 01:10:02,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:02,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958925244] [2021-12-16 01:10:02,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:02,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:02,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:02,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:02,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 01:10:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:02,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 01:10:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:02,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 01:10:02,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:02,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 01:10:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:02,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-16 01:10:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:02,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-16 01:10:02,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:02,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-16 01:10:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 01:10:02,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:02,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958925244] [2021-12-16 01:10:02,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958925244] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:10:02,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:10:02,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:10:02,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131662162] [2021-12-16 01:10:02,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:10:02,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:10:02,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:02,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:10:02,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:10:02,429 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) [2021-12-16 01:10:02,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:02,591 INFO L93 Difference]: Finished difference Result 2538 states and 3469 transitions. [2021-12-16 01:10:02,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 01:10:02,592 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 [2021-12-16 01:10:02,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:02,598 INFO L225 Difference]: With dead ends: 2538 [2021-12-16 01:10:02,598 INFO L226 Difference]: Without dead ends: 1582 [2021-12-16 01:10:02,601 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 [2021-12-16 01:10:02,601 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 [2021-12-16 01:10:02,601 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] [2021-12-16 01:10:02,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-12-16 01:10:02,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1123. [2021-12-16 01:10:02,667 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) [2021-12-16 01:10:02,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1499 transitions. [2021-12-16 01:10:02,670 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1499 transitions. Word has length 111 [2021-12-16 01:10:02,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:02,670 INFO L470 AbstractCegarLoop]: Abstraction has 1123 states and 1499 transitions. [2021-12-16 01:10:02,670 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) [2021-12-16 01:10:02,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1499 transitions. [2021-12-16 01:10:02,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-16 01:10:02,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:02,671 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] [2021-12-16 01:10:02,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-16 01:10:02,672 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:02,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:02,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1939847605, now seen corresponding path program 1 times [2021-12-16 01:10:02,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:02,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131706358] [2021-12-16 01:10:02,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:02,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:02,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:02,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 01:10:02,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:02,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 01:10:02,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:02,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 01:10:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:02,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 01:10:02,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:02,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-16 01:10:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:02,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-16 01:10:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:02,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-16 01:10:02,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:02,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 01:10:02,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:02,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131706358] [2021-12-16 01:10:02,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131706358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:10:02,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:10:02,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 01:10:02,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994995519] [2021-12-16 01:10:02,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:10:02,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 01:10:02,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:02,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 01:10:02,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:10:02,774 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) [2021-12-16 01:10:03,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:03,239 INFO L93 Difference]: Finished difference Result 2606 states and 3573 transitions. [2021-12-16 01:10:03,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 01:10:03,240 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 [2021-12-16 01:10:03,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:03,246 INFO L225 Difference]: With dead ends: 2606 [2021-12-16 01:10:03,246 INFO L226 Difference]: Without dead ends: 1683 [2021-12-16 01:10:03,248 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 [2021-12-16 01:10:03,248 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, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 01:10:03,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1053 Valid, 2152 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 01:10:03,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2021-12-16 01:10:03,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1139. [2021-12-16 01:10:03,315 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) [2021-12-16 01:10:03,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1498 transitions. [2021-12-16 01:10:03,317 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1498 transitions. Word has length 112 [2021-12-16 01:10:03,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:03,318 INFO L470 AbstractCegarLoop]: Abstraction has 1139 states and 1498 transitions. [2021-12-16 01:10:03,318 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) [2021-12-16 01:10:03,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1498 transitions. [2021-12-16 01:10:03,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-16 01:10:03,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:03,319 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] [2021-12-16 01:10:03,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-16 01:10:03,319 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:03,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:03,320 INFO L85 PathProgramCache]: Analyzing trace with hash 889695918, now seen corresponding path program 1 times [2021-12-16 01:10:03,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:03,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59909911] [2021-12-16 01:10:03,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:03,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:03,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:03,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 01:10:03,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:03,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 01:10:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:03,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 01:10:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:03,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 01:10:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:03,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-16 01:10:03,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:03,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-16 01:10:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:03,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-16 01:10:03,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 01:10:03,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:03,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59909911] [2021-12-16 01:10:03,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59909911] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:10:03,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:10:03,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 01:10:03,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683658332] [2021-12-16 01:10:03,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:10:03,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 01:10:03,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:03,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 01:10:03,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 01:10:03,372 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) [2021-12-16 01:10:03,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:03,536 INFO L93 Difference]: Finished difference Result 3175 states and 4263 transitions. [2021-12-16 01:10:03,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 01:10:03,536 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 [2021-12-16 01:10:03,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:03,543 INFO L225 Difference]: With dead ends: 3175 [2021-12-16 01:10:03,543 INFO L226 Difference]: Without dead ends: 2287 [2021-12-16 01:10:03,545 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 [2021-12-16 01:10:03,546 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 [2021-12-16 01:10:03,546 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] [2021-12-16 01:10:03,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-12-16 01:10:03,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 1935. [2021-12-16 01:10:03,658 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) [2021-12-16 01:10:03,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 2548 transitions. [2021-12-16 01:10:03,662 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 2548 transitions. Word has length 112 [2021-12-16 01:10:03,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:03,663 INFO L470 AbstractCegarLoop]: Abstraction has 1935 states and 2548 transitions. [2021-12-16 01:10:03,663 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) [2021-12-16 01:10:03,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 2548 transitions. [2021-12-16 01:10:03,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-16 01:10:03,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:03,664 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] [2021-12-16 01:10:03,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-16 01:10:03,665 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:03,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:03,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1041296419, now seen corresponding path program 1 times [2021-12-16 01:10:03,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:03,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550711019] [2021-12-16 01:10:03,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:03,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:03,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:03,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:03,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 01:10:03,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:03,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 01:10:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:03,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 01:10:03,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:03,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 01:10:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:03,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-16 01:10:03,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:03,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-16 01:10:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:03,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-16 01:10:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:03,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 01:10:03,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:03,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550711019] [2021-12-16 01:10:03,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550711019] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:10:03,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:10:03,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:10:03,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302502606] [2021-12-16 01:10:03,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:10:03,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:10:03,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:03,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:10:03,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:10:03,775 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) [2021-12-16 01:10:04,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:04,264 INFO L93 Difference]: Finished difference Result 4386 states and 5918 transitions. [2021-12-16 01:10:04,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 01:10:04,265 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 [2021-12-16 01:10:04,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:04,274 INFO L225 Difference]: With dead ends: 4386 [2021-12-16 01:10:04,274 INFO L226 Difference]: Without dead ends: 2800 [2021-12-16 01:10:04,277 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 [2021-12-16 01:10:04,278 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, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 01:10:04,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [805 Valid, 2505 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 01:10:04,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2800 states. [2021-12-16 01:10:04,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2800 to 1954. [2021-12-16 01:10:04,414 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) [2021-12-16 01:10:04,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1954 states to 1954 states and 2566 transitions. [2021-12-16 01:10:04,419 INFO L78 Accepts]: Start accepts. Automaton has 1954 states and 2566 transitions. Word has length 114 [2021-12-16 01:10:04,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:04,420 INFO L470 AbstractCegarLoop]: Abstraction has 1954 states and 2566 transitions. [2021-12-16 01:10:04,420 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) [2021-12-16 01:10:04,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1954 states and 2566 transitions. [2021-12-16 01:10:04,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-16 01:10:04,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:04,422 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] [2021-12-16 01:10:04,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-16 01:10:04,422 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:04,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:04,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1708808100, now seen corresponding path program 1 times [2021-12-16 01:10:04,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:04,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609520219] [2021-12-16 01:10:04,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:04,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:04,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:04,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 01:10:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:04,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 01:10:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:04,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 01:10:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:04,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-16 01:10:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:04,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-16 01:10:04,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:04,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-16 01:10:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:04,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-16 01:10:04,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 01:10:04,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:04,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609520219] [2021-12-16 01:10:04,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609520219] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:10:04,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:10:04,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 01:10:04,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004253583] [2021-12-16 01:10:04,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:10:04,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 01:10:04,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:04,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 01:10:04,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 01:10:04,472 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) [2021-12-16 01:10:04,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:04,691 INFO L93 Difference]: Finished difference Result 5154 states and 6849 transitions. [2021-12-16 01:10:04,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 01:10:04,693 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 [2021-12-16 01:10:04,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:04,703 INFO L225 Difference]: With dead ends: 5154 [2021-12-16 01:10:04,703 INFO L226 Difference]: Without dead ends: 3584 [2021-12-16 01:10:04,705 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 [2021-12-16 01:10:04,706 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 [2021-12-16 01:10:04,706 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] [2021-12-16 01:10:04,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3584 states. [2021-12-16 01:10:04,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3584 to 3015. [2021-12-16 01:10:04,807 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) [2021-12-16 01:10:04,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 3957 transitions. [2021-12-16 01:10:04,813 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 3957 transitions. Word has length 115 [2021-12-16 01:10:04,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:04,813 INFO L470 AbstractCegarLoop]: Abstraction has 3015 states and 3957 transitions. [2021-12-16 01:10:04,813 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) [2021-12-16 01:10:04,813 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 3957 transitions. [2021-12-16 01:10:04,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-16 01:10:04,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:04,815 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] [2021-12-16 01:10:04,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-16 01:10:04,815 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:04,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:04,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1228455916, now seen corresponding path program 1 times [2021-12-16 01:10:04,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:04,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642224530] [2021-12-16 01:10:04,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:04,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:04,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:04,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:04,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-16 01:10:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:04,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 01:10:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:04,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-16 01:10:04,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:04,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-16 01:10:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:04,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 01:10:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:04,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-16 01:10:04,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:04,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-16 01:10:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:04,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 01:10:04,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:04,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642224530] [2021-12-16 01:10:04,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642224530] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:10:04,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:10:04,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 01:10:04,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610329263] [2021-12-16 01:10:04,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:10:04,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 01:10:04,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:04,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 01:10:04,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 01:10:04,860 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) [2021-12-16 01:10:05,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:05,120 INFO L93 Difference]: Finished difference Result 7127 states and 9424 transitions. [2021-12-16 01:10:05,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 01:10:05,121 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 [2021-12-16 01:10:05,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:05,134 INFO L225 Difference]: With dead ends: 7127 [2021-12-16 01:10:05,134 INFO L226 Difference]: Without dead ends: 4626 [2021-12-16 01:10:05,139 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 [2021-12-16 01:10:05,140 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 [2021-12-16 01:10:05,140 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] [2021-12-16 01:10:05,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4626 states. [2021-12-16 01:10:05,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4626 to 4292. [2021-12-16 01:10:05,419 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) [2021-12-16 01:10:05,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 5631 transitions. [2021-12-16 01:10:05,430 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 5631 transitions. Word has length 115 [2021-12-16 01:10:05,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:05,430 INFO L470 AbstractCegarLoop]: Abstraction has 4292 states and 5631 transitions. [2021-12-16 01:10:05,430 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) [2021-12-16 01:10:05,430 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 5631 transitions. [2021-12-16 01:10:05,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-16 01:10:05,432 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:05,433 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] [2021-12-16 01:10:05,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-16 01:10:05,433 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:05,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:05,433 INFO L85 PathProgramCache]: Analyzing trace with hash 331094376, now seen corresponding path program 1 times [2021-12-16 01:10:05,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:05,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79632183] [2021-12-16 01:10:05,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:05,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:05,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:05,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 01:10:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:05,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-16 01:10:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:05,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-16 01:10:05,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:05,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-16 01:10:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:05,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-16 01:10:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:05,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-16 01:10:05,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:05,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-16 01:10:05,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:05,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 01:10:05,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:05,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79632183] [2021-12-16 01:10:05,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79632183] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:10:05,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:10:05,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:10:05,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598736678] [2021-12-16 01:10:05,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:10:05,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:10:05,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:05,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:10:05,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:10:05,474 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) [2021-12-16 01:10:05,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:05,797 INFO L93 Difference]: Finished difference Result 9705 states and 13179 transitions. [2021-12-16 01:10:05,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:10:05,798 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 [2021-12-16 01:10:05,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:05,815 INFO L225 Difference]: With dead ends: 9705 [2021-12-16 01:10:05,815 INFO L226 Difference]: Without dead ends: 5818 [2021-12-16 01:10:05,824 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 [2021-12-16 01:10:05,825 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 [2021-12-16 01:10:05,825 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] [2021-12-16 01:10:05,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5818 states. [2021-12-16 01:10:06,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5818 to 4298. [2021-12-16 01:10:06,063 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) [2021-12-16 01:10:06,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4298 states to 4298 states and 5637 transitions. [2021-12-16 01:10:06,074 INFO L78 Accepts]: Start accepts. Automaton has 4298 states and 5637 transitions. Word has length 116 [2021-12-16 01:10:06,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:06,074 INFO L470 AbstractCegarLoop]: Abstraction has 4298 states and 5637 transitions. [2021-12-16 01:10:06,074 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) [2021-12-16 01:10:06,074 INFO L276 IsEmpty]: Start isEmpty. Operand 4298 states and 5637 transitions. [2021-12-16 01:10:06,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-16 01:10:06,076 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:06,076 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] [2021-12-16 01:10:06,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-16 01:10:06,076 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:06,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:06,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1590062833, now seen corresponding path program 1 times [2021-12-16 01:10:06,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:06,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861001281] [2021-12-16 01:10:06,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:06,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:06,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:06,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:06,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-16 01:10:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:06,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 01:10:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:06,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-16 01:10:06,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:06,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-16 01:10:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:06,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 01:10:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:06,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-16 01:10:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:06,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-16 01:10:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 01:10:06,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:06,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861001281] [2021-12-16 01:10:06,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861001281] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:10:06,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:10:06,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 01:10:06,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420503769] [2021-12-16 01:10:06,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:10:06,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 01:10:06,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:06,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 01:10:06,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 01:10:06,137 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) [2021-12-16 01:10:06,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:06,333 INFO L93 Difference]: Finished difference Result 9003 states and 12067 transitions. [2021-12-16 01:10:06,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 01:10:06,333 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 [2021-12-16 01:10:06,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:06,375 INFO L225 Difference]: With dead ends: 9003 [2021-12-16 01:10:06,376 INFO L226 Difference]: Without dead ends: 4802 [2021-12-16 01:10:06,380 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 [2021-12-16 01:10:06,381 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 [2021-12-16 01:10:06,381 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] [2021-12-16 01:10:06,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4802 states. [2021-12-16 01:10:06,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4802 to 3865. [2021-12-16 01:10:06,538 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) [2021-12-16 01:10:06,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3865 states to 3865 states and 5091 transitions. [2021-12-16 01:10:06,547 INFO L78 Accepts]: Start accepts. Automaton has 3865 states and 5091 transitions. Word has length 117 [2021-12-16 01:10:06,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:06,548 INFO L470 AbstractCegarLoop]: Abstraction has 3865 states and 5091 transitions. [2021-12-16 01:10:06,548 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) [2021-12-16 01:10:06,548 INFO L276 IsEmpty]: Start isEmpty. Operand 3865 states and 5091 transitions. [2021-12-16 01:10:06,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-16 01:10:06,549 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:06,549 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] [2021-12-16 01:10:06,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-16 01:10:06,550 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:06,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:06,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1465420109, now seen corresponding path program 1 times [2021-12-16 01:10:06,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:06,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428327205] [2021-12-16 01:10:06,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:06,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:06,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:06,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:06,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 01:10:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:06,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-16 01:10:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:06,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-16 01:10:06,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:06,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-16 01:10:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:06,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-16 01:10:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:06,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-16 01:10:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:06,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-16 01:10:06,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 01:10:06,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:06,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428327205] [2021-12-16 01:10:06,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428327205] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:10:06,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:10:06,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:10:06,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032443179] [2021-12-16 01:10:06,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:10:06,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:10:06,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:06,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:10:06,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:10:06,585 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) [2021-12-16 01:10:06,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:06,851 INFO L93 Difference]: Finished difference Result 8503 states and 11497 transitions. [2021-12-16 01:10:06,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:10:06,852 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 [2021-12-16 01:10:06,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:06,863 INFO L225 Difference]: With dead ends: 8503 [2021-12-16 01:10:06,864 INFO L226 Difference]: Without dead ends: 4851 [2021-12-16 01:10:06,869 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 [2021-12-16 01:10:06,870 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 151 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2021-12-16 01:10:06,871 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] [2021-12-16 01:10:06,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4851 states. [2021-12-16 01:10:07,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4851 to 3875. [2021-12-16 01:10:07,043 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) [2021-12-16 01:10:07,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 5101 transitions. [2021-12-16 01:10:07,053 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 5101 transitions. Word has length 118 [2021-12-16 01:10:07,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:07,054 INFO L470 AbstractCegarLoop]: Abstraction has 3875 states and 5101 transitions. [2021-12-16 01:10:07,054 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) [2021-12-16 01:10:07,054 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 5101 transitions. [2021-12-16 01:10:07,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-16 01:10:07,055 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:07,056 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] [2021-12-16 01:10:07,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-16 01:10:07,056 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:07,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:07,056 INFO L85 PathProgramCache]: Analyzing trace with hash -132784146, now seen corresponding path program 1 times [2021-12-16 01:10:07,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:07,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861119371] [2021-12-16 01:10:07,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:07,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:07,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:07,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:07,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 01:10:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:07,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-16 01:10:07,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:07,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-16 01:10:07,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:07,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-16 01:10:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:07,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-16 01:10:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:07,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-16 01:10:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:07,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-16 01:10:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:07,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 01:10:07,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:07,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861119371] [2021-12-16 01:10:07,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861119371] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:10:07,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:10:07,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 01:10:07,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133260014] [2021-12-16 01:10:07,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:10:07,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 01:10:07,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:07,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 01:10:07,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 01:10:07,126 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) [2021-12-16 01:10:07,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:07,369 INFO L93 Difference]: Finished difference Result 8451 states and 11414 transitions. [2021-12-16 01:10:07,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 01:10:07,370 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 [2021-12-16 01:10:07,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:07,382 INFO L225 Difference]: With dead ends: 8451 [2021-12-16 01:10:07,382 INFO L226 Difference]: Without dead ends: 4722 [2021-12-16 01:10:07,389 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 [2021-12-16 01:10:07,390 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 [2021-12-16 01:10:07,390 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] [2021-12-16 01:10:07,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4722 states. [2021-12-16 01:10:07,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4722 to 2925. [2021-12-16 01:10:07,569 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) [2021-12-16 01:10:07,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2925 states to 2925 states and 3834 transitions. [2021-12-16 01:10:07,577 INFO L78 Accepts]: Start accepts. Automaton has 2925 states and 3834 transitions. Word has length 118 [2021-12-16 01:10:07,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:07,577 INFO L470 AbstractCegarLoop]: Abstraction has 2925 states and 3834 transitions. [2021-12-16 01:10:07,577 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) [2021-12-16 01:10:07,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2925 states and 3834 transitions. [2021-12-16 01:10:07,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-16 01:10:07,582 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:07,582 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] [2021-12-16 01:10:07,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-16 01:10:07,583 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:07,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:07,583 INFO L85 PathProgramCache]: Analyzing trace with hash -664741411, now seen corresponding path program 1 times [2021-12-16 01:10:07,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:07,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782805346] [2021-12-16 01:10:07,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:07,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:07,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:07,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:07,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 01:10:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:07,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 01:10:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:07,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 01:10:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:07,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 01:10:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:07,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-16 01:10:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:07,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-16 01:10:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:07,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-16 01:10:07,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:07,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-16 01:10:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:07,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-16 01:10:07,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:07,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-16 01:10:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:07,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-16 01:10:07,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:07,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-12-16 01:10:07,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:07,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-16 01:10:07,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:07,711 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 16 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-16 01:10:07,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:07,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782805346] [2021-12-16 01:10:07,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782805346] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:10:07,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859671108] [2021-12-16 01:10:07,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:07,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:10:07,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:10:07,713 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) [2021-12-16 01:10:07,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 01:10:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:07,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 01:10:07,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:10:08,240 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 77 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-16 01:10:08,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 01:10:08,597 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-16 01:10:08,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859671108] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 01:10:08,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 01:10:08,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2021-12-16 01:10:08,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738393839] [2021-12-16 01:10:08,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 01:10:08,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 01:10:08,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:08,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 01:10:08,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-16 01:10:08,599 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) [2021-12-16 01:10:11,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:11,188 INFO L93 Difference]: Finished difference Result 9990 states and 13988 transitions. [2021-12-16 01:10:11,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-16 01:10:11,189 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 [2021-12-16 01:10:11,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:11,211 INFO L225 Difference]: With dead ends: 9990 [2021-12-16 01:10:11,211 INFO L226 Difference]: Without dead ends: 7352 [2021-12-16 01:10:11,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 402 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=749, Invalid=3411, Unknown=0, NotChecked=0, Total=4160 [2021-12-16 01:10:11,219 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 4455 mSDsluCounter, 2937 mSDsCounter, 0 mSdLazyCounter, 2038 mSolverCounterSat, 1308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.4s IncrementalHoareTripleChecker+Time [2021-12-16 01:10:11,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4455 Valid, 3273 Invalid, 3346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1308 Valid, 2038 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-16 01:10:11,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7352 states. [2021-12-16 01:10:11,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7352 to 3449. [2021-12-16 01:10:11,445 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) [2021-12-16 01:10:11,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 4495 transitions. [2021-12-16 01:10:11,452 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 4495 transitions. Word has length 185 [2021-12-16 01:10:11,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:11,452 INFO L470 AbstractCegarLoop]: Abstraction has 3449 states and 4495 transitions. [2021-12-16 01:10:11,453 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) [2021-12-16 01:10:11,453 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 4495 transitions. [2021-12-16 01:10:11,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-12-16 01:10:11,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:11,457 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] [2021-12-16 01:10:11,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 01:10:11,675 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 [2021-12-16 01:10:11,675 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:11,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:11,675 INFO L85 PathProgramCache]: Analyzing trace with hash 782511274, now seen corresponding path program 1 times [2021-12-16 01:10:11,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:11,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972740148] [2021-12-16 01:10:11,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:11,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:11,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:11,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:11,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 01:10:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:11,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 01:10:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:11,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 01:10:11,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:11,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 01:10:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:11,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-16 01:10:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:11,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-16 01:10:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:11,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-16 01:10:11,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:11,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-16 01:10:11,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:11,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-16 01:10:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:11,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-16 01:10:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:11,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-16 01:10:11,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:11,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-12-16 01:10:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:11,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-16 01:10:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:11,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-12-16 01:10:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:11,857 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-16 01:10:11,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:11,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972740148] [2021-12-16 01:10:11,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972740148] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:10:11,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990202236] [2021-12-16 01:10:11,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:11,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:10:11,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:10:11,859 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) [2021-12-16 01:10:11,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 01:10:12,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:12,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 01:10:12,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:10:12,407 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 53 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 01:10:12,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 01:10:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-16 01:10:12,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990202236] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 01:10:12,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 01:10:12,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2021-12-16 01:10:12,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404603449] [2021-12-16 01:10:12,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 01:10:12,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 01:10:12,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:12,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 01:10:12,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-12-16 01:10:12,739 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) [2021-12-16 01:10:19,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:19,528 INFO L93 Difference]: Finished difference Result 17499 states and 23924 transitions. [2021-12-16 01:10:19,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-12-16 01:10:19,529 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 [2021-12-16 01:10:19,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:19,564 INFO L225 Difference]: With dead ends: 17499 [2021-12-16 01:10:19,565 INFO L226 Difference]: Without dead ends: 14346 [2021-12-16 01:10:19,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 474 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5045 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1835, Invalid=12207, Unknown=0, NotChecked=0, Total=14042 [2021-12-16 01:10:19,576 INFO L933 BasicCegarLoop]: 1822 mSDtfsCounter, 7160 mSDsluCounter, 13743 mSDsCounter, 0 mSdLazyCounter, 5454 mSolverCounterSat, 4426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s 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, 4.2s IncrementalHoareTripleChecker+Time [2021-12-16 01:10:19,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7160 Valid, 15565 Invalid, 9880 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4426 Valid, 5454 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-12-16 01:10:19,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14346 states. [2021-12-16 01:10:19,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14346 to 6315. [2021-12-16 01:10:19,968 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) [2021-12-16 01:10:19,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6315 states to 6315 states and 8241 transitions. [2021-12-16 01:10:19,981 INFO L78 Accepts]: Start accepts. Automaton has 6315 states and 8241 transitions. Word has length 193 [2021-12-16 01:10:19,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:19,984 INFO L470 AbstractCegarLoop]: Abstraction has 6315 states and 8241 transitions. [2021-12-16 01:10:19,984 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) [2021-12-16 01:10:19,984 INFO L276 IsEmpty]: Start isEmpty. Operand 6315 states and 8241 transitions. [2021-12-16 01:10:19,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-16 01:10:19,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:19,993 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] [2021-12-16 01:10:20,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-16 01:10:20,224 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 [2021-12-16 01:10:20,224 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:20,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:20,225 INFO L85 PathProgramCache]: Analyzing trace with hash -579946063, now seen corresponding path program 1 times [2021-12-16 01:10:20,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:20,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234952922] [2021-12-16 01:10:20,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:20,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:20,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:20,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:20,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 01:10:20,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:20,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 01:10:20,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:20,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 01:10:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:20,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-16 01:10:20,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:20,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-16 01:10:20,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:20,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-16 01:10:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:20,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-16 01:10:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:20,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-16 01:10:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:20,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-16 01:10:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:20,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-12-16 01:10:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:20,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-16 01:10:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:20,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-16 01:10:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:20,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-16 01:10:20,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:20,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-16 01:10:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:20,301 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-16 01:10:20,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:20,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234952922] [2021-12-16 01:10:20,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234952922] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:10:20,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:10:20,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:10:20,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577704728] [2021-12-16 01:10:20,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:10:20,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:10:20,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:20,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:10:20,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:10:20,303 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) [2021-12-16 01:10:21,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:21,375 INFO L93 Difference]: Finished difference Result 21323 states and 28571 transitions. [2021-12-16 01:10:21,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 01:10:21,375 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 [2021-12-16 01:10:21,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:21,402 INFO L225 Difference]: With dead ends: 21323 [2021-12-16 01:10:21,402 INFO L226 Difference]: Without dead ends: 15366 [2021-12-16 01:10:21,409 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 [2021-12-16 01:10:21,410 INFO L933 BasicCegarLoop]: 572 mSDtfsCounter, 811 mSDsluCounter, 2510 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2021-12-16 01:10:21,410 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] [2021-12-16 01:10:21,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15366 states. [2021-12-16 01:10:21,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15366 to 8157. [2021-12-16 01:10:21,882 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) [2021-12-16 01:10:21,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8157 states to 8157 states and 10655 transitions. [2021-12-16 01:10:21,902 INFO L78 Accepts]: Start accepts. Automaton has 8157 states and 10655 transitions. Word has length 195 [2021-12-16 01:10:21,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:21,903 INFO L470 AbstractCegarLoop]: Abstraction has 8157 states and 10655 transitions. [2021-12-16 01:10:21,904 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) [2021-12-16 01:10:21,904 INFO L276 IsEmpty]: Start isEmpty. Operand 8157 states and 10655 transitions. [2021-12-16 01:10:21,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-16 01:10:21,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:21,920 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] [2021-12-16 01:10:21,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-16 01:10:21,920 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:21,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:21,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1014240118, now seen corresponding path program 1 times [2021-12-16 01:10:21,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:21,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445407140] [2021-12-16 01:10:21,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:21,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:21,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:22,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:22,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 01:10:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:22,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 01:10:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:22,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 01:10:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:22,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-16 01:10:22,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:22,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-16 01:10:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:22,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-16 01:10:22,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:22,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-16 01:10:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:22,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-16 01:10:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:22,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-16 01:10:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:22,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-16 01:10:22,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:22,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-16 01:10:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:22,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-12-16 01:10:22,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:22,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-12-16 01:10:22,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:22,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2021-12-16 01:10:22,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-16 01:10:22,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:22,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445407140] [2021-12-16 01:10:22,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445407140] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:10:22,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162972628] [2021-12-16 01:10:22,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:22,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:10:22,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:10:22,048 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) [2021-12-16 01:10:22,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 01:10:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:22,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 01:10:22,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:10:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 49 proven. 6 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-16 01:10:22,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 01:10:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 01:10:22,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162972628] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 01:10:22,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-16 01:10:22,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 7] total 14 [2021-12-16 01:10:22,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236390323] [2021-12-16 01:10:22,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:10:22,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:10:22,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:22,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:10:22,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-16 01:10:22,784 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) [2021-12-16 01:10:23,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:23,123 INFO L93 Difference]: Finished difference Result 13437 states and 17606 transitions. [2021-12-16 01:10:23,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 01:10:23,124 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 [2021-12-16 01:10:23,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:23,141 INFO L225 Difference]: With dead ends: 13437 [2021-12-16 01:10:23,142 INFO L226 Difference]: Without dead ends: 5486 [2021-12-16 01:10:23,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 415 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-16 01:10:23,152 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 [2021-12-16 01:10:23,152 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] [2021-12-16 01:10:23,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5486 states. [2021-12-16 01:10:23,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5486 to 5486. [2021-12-16 01:10:23,451 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) [2021-12-16 01:10:23,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5486 states to 5486 states and 7171 transitions. [2021-12-16 01:10:23,462 INFO L78 Accepts]: Start accepts. Automaton has 5486 states and 7171 transitions. Word has length 197 [2021-12-16 01:10:23,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:23,463 INFO L470 AbstractCegarLoop]: Abstraction has 5486 states and 7171 transitions. [2021-12-16 01:10:23,463 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) [2021-12-16 01:10:23,463 INFO L276 IsEmpty]: Start isEmpty. Operand 5486 states and 7171 transitions. [2021-12-16 01:10:23,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-16 01:10:23,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:23,470 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] [2021-12-16 01:10:23,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 01:10:23,687 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 [2021-12-16 01:10:23,687 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:23,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:23,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1806123049, now seen corresponding path program 1 times [2021-12-16 01:10:23,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:23,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835760454] [2021-12-16 01:10:23,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:23,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:23,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:23,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 01:10:23,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:23,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 01:10:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:23,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 01:10:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:23,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-16 01:10:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:23,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-16 01:10:23,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:23,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-16 01:10:23,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:23,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-16 01:10:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:23,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-16 01:10:23,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:23,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-16 01:10:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:23,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-16 01:10:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:23,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-16 01:10:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:23,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-12-16 01:10:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:23,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-12-16 01:10:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:23,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2021-12-16 01:10:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-16 01:10:23,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:23,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835760454] [2021-12-16 01:10:23,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835760454] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:10:23,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546653307] [2021-12-16 01:10:23,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:23,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:10:23,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:10:23,864 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) [2021-12-16 01:10:23,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 01:10:24,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:24,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 01:10:24,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:10:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 71 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 01:10:24,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 01:10:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-16 01:10:24,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546653307] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 01:10:24,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 01:10:24,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 24 [2021-12-16 01:10:24,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259960531] [2021-12-16 01:10:24,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 01:10:24,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-16 01:10:24,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:24,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-16 01:10:24,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-12-16 01:10:24,989 INFO L87 Difference]: Start difference. First operand 5486 states and 7171 transitions. Second operand has 24 states, 24 states have (on average 14.25) internal successors, (342), 24 states have internal predecessors, (342), 9 states have call successors, (41), 5 states have call predecessors, (41), 5 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2021-12-16 01:10:37,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:37,445 INFO L93 Difference]: Finished difference Result 28569 states and 40063 transitions. [2021-12-16 01:10:37,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2021-12-16 01:10:37,446 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 14.25) internal successors, (342), 24 states have internal predecessors, (342), 9 states have call successors, (41), 5 states have call predecessors, (41), 5 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) Word has length 197 [2021-12-16 01:10:37,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:37,504 INFO L225 Difference]: With dead ends: 28569 [2021-12-16 01:10:37,504 INFO L226 Difference]: Without dead ends: 23367 [2021-12-16 01:10:37,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 415 SyntacticMatches, 1 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26384 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6223, Invalid=57029, Unknown=0, NotChecked=0, Total=63252 [2021-12-16 01:10:37,528 INFO L933 BasicCegarLoop]: 704 mSDtfsCounter, 9301 mSDsluCounter, 7984 mSDsCounter, 0 mSdLazyCounter, 12849 mSolverCounterSat, 4404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9301 SdHoareTripleChecker+Valid, 8688 SdHoareTripleChecker+Invalid, 17253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4404 IncrementalHoareTripleChecker+Valid, 12849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-12-16 01:10:37,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9301 Valid, 8688 Invalid, 17253 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4404 Valid, 12849 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2021-12-16 01:10:37,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23367 states. [2021-12-16 01:10:38,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23367 to 11873. [2021-12-16 01:10:38,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11873 states, 8944 states have (on average 1.3064624329159213) internal successors, (11685), 9014 states have internal predecessors, (11685), 1889 states have call successors, (1889), 1039 states have call predecessors, (1889), 1039 states have return successors, (1889), 1819 states have call predecessors, (1889), 1889 states have call successors, (1889) [2021-12-16 01:10:38,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11873 states to 11873 states and 15463 transitions. [2021-12-16 01:10:38,498 INFO L78 Accepts]: Start accepts. Automaton has 11873 states and 15463 transitions. Word has length 197 [2021-12-16 01:10:38,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:38,500 INFO L470 AbstractCegarLoop]: Abstraction has 11873 states and 15463 transitions. [2021-12-16 01:10:38,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.25) internal successors, (342), 24 states have internal predecessors, (342), 9 states have call successors, (41), 5 states have call predecessors, (41), 5 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2021-12-16 01:10:38,500 INFO L276 IsEmpty]: Start isEmpty. Operand 11873 states and 15463 transitions. [2021-12-16 01:10:38,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-16 01:10:38,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:38,517 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:10:38,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 01:10:38,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:10:38,735 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:38,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:38,736 INFO L85 PathProgramCache]: Analyzing trace with hash 2096530114, now seen corresponding path program 1 times [2021-12-16 01:10:38,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:38,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451948265] [2021-12-16 01:10:38,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:38,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:38,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:38,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 01:10:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:38,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 01:10:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:38,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 01:10:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:38,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-16 01:10:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:38,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-16 01:10:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:38,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-16 01:10:38,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:38,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-16 01:10:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:38,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-16 01:10:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:38,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-16 01:10:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:38,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-16 01:10:38,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:38,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-16 01:10:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:38,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-12-16 01:10:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:38,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-12-16 01:10:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:38,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2021-12-16 01:10:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:38,825 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-16 01:10:38,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:38,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451948265] [2021-12-16 01:10:38,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451948265] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:10:38,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:10:38,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 01:10:38,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517541028] [2021-12-16 01:10:38,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:10:38,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:10:38,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:38,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:10:38,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:10:38,827 INFO L87 Difference]: Start difference. First operand 11873 states and 15463 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 01:10:39,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:39,682 INFO L93 Difference]: Finished difference Result 22733 states and 29699 transitions. [2021-12-16 01:10:39,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 01:10:39,683 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 197 [2021-12-16 01:10:39,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:39,706 INFO L225 Difference]: With dead ends: 22733 [2021-12-16 01:10:39,706 INFO L226 Difference]: Without dead ends: 11127 [2021-12-16 01:10:39,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:10:39,721 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 449 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:10:39,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 475 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:10:39,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11127 states. [2021-12-16 01:10:40,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11127 to 11125. [2021-12-16 01:10:40,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11125 states, 8388 states have (on average 1.308416785884597) internal successors, (10975), 8454 states have internal predecessors, (10975), 1767 states have call successors, (1767), 969 states have call predecessors, (1767), 969 states have return successors, (1767), 1701 states have call predecessors, (1767), 1767 states have call successors, (1767) [2021-12-16 01:10:40,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11125 states to 11125 states and 14509 transitions. [2021-12-16 01:10:40,425 INFO L78 Accepts]: Start accepts. Automaton has 11125 states and 14509 transitions. Word has length 197 [2021-12-16 01:10:40,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:40,425 INFO L470 AbstractCegarLoop]: Abstraction has 11125 states and 14509 transitions. [2021-12-16 01:10:40,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 01:10:40,426 INFO L276 IsEmpty]: Start isEmpty. Operand 11125 states and 14509 transitions. [2021-12-16 01:10:40,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-12-16 01:10:40,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:40,438 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:10:40,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-16 01:10:40,438 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:40,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:40,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1193102570, now seen corresponding path program 1 times [2021-12-16 01:10:40,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:40,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632375370] [2021-12-16 01:10:40,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:40,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:40,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:40,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 01:10:40,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:40,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 01:10:40,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:40,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 01:10:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:40,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-16 01:10:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:40,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-16 01:10:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:40,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-16 01:10:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:40,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-16 01:10:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:40,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-16 01:10:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:40,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-16 01:10:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:40,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-16 01:10:40,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:40,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-16 01:10:40,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:40,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-16 01:10:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:40,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-12-16 01:10:40,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:40,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-12-16 01:10:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:40,606 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 29 proven. 19 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-16 01:10:40,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:40,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632375370] [2021-12-16 01:10:40,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632375370] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:10:40,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762232105] [2021-12-16 01:10:40,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:40,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:10:40,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:10:40,608 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 01:10:40,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 01:10:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:40,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 01:10:40,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:10:41,030 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 66 proven. 4 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-16 01:10:41,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 01:10:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-16 01:10:41,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762232105] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 01:10:41,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 01:10:41,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2021-12-16 01:10:41,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689784837] [2021-12-16 01:10:41,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 01:10:41,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 01:10:41,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:41,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 01:10:41,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-12-16 01:10:41,325 INFO L87 Difference]: Start difference. First operand 11125 states and 14509 transitions. Second operand has 17 states, 17 states have (on average 15.117647058823529) internal successors, (257), 16 states have internal predecessors, (257), 6 states have call successors, (37), 4 states have call predecessors, (37), 6 states have return successors, (37), 7 states have call predecessors, (37), 6 states have call successors, (37) [2021-12-16 01:10:46,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:46,366 INFO L93 Difference]: Finished difference Result 34382 states and 47559 transitions. [2021-12-16 01:10:46,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-16 01:10:46,367 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 15.117647058823529) internal successors, (257), 16 states have internal predecessors, (257), 6 states have call successors, (37), 4 states have call predecessors, (37), 6 states have return successors, (37), 7 states have call predecessors, (37), 6 states have call successors, (37) Word has length 198 [2021-12-16 01:10:46,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:46,421 INFO L225 Difference]: With dead ends: 34382 [2021-12-16 01:10:46,422 INFO L226 Difference]: Without dead ends: 23563 [2021-12-16 01:10:46,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 426 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2057 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=886, Invalid=5594, Unknown=0, NotChecked=0, Total=6480 [2021-12-16 01:10:46,441 INFO L933 BasicCegarLoop]: 638 mSDtfsCounter, 3541 mSDsluCounter, 6708 mSDsCounter, 0 mSdLazyCounter, 5658 mSolverCounterSat, 1858 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3541 SdHoareTripleChecker+Valid, 7346 SdHoareTripleChecker+Invalid, 7516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1858 IncrementalHoareTripleChecker+Valid, 5658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-16 01:10:46,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3541 Valid, 7346 Invalid, 7516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1858 Valid, 5658 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-16 01:10:46,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23563 states. [2021-12-16 01:10:47,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23563 to 12473. [2021-12-16 01:10:47,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12473 states, 9416 states have (on average 1.304269328802039) internal successors, (12281), 9490 states have internal predecessors, (12281), 1967 states have call successors, (1967), 1089 states have call predecessors, (1967), 1089 states have return successors, (1967), 1893 states have call predecessors, (1967), 1967 states have call successors, (1967) [2021-12-16 01:10:47,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12473 states to 12473 states and 16215 transitions. [2021-12-16 01:10:47,553 INFO L78 Accepts]: Start accepts. Automaton has 12473 states and 16215 transitions. Word has length 198 [2021-12-16 01:10:47,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:47,553 INFO L470 AbstractCegarLoop]: Abstraction has 12473 states and 16215 transitions. [2021-12-16 01:10:47,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.117647058823529) internal successors, (257), 16 states have internal predecessors, (257), 6 states have call successors, (37), 4 states have call predecessors, (37), 6 states have return successors, (37), 7 states have call predecessors, (37), 6 states have call successors, (37) [2021-12-16 01:10:47,554 INFO L276 IsEmpty]: Start isEmpty. Operand 12473 states and 16215 transitions. [2021-12-16 01:10:47,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-12-16 01:10:47,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:47,570 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:10:47,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 01:10:47,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-16 01:10:47,784 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:47,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:47,784 INFO L85 PathProgramCache]: Analyzing trace with hash -679576872, now seen corresponding path program 1 times [2021-12-16 01:10:47,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:47,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998149476] [2021-12-16 01:10:47,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:47,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:47,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:47,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 01:10:47,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:47,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 01:10:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:47,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 01:10:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:47,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-16 01:10:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:47,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-16 01:10:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:47,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-16 01:10:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:47,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-16 01:10:47,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:47,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-16 01:10:47,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:47,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-16 01:10:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:47,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-16 01:10:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:47,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-12-16 01:10:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:47,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-16 01:10:47,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:47,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-12-16 01:10:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:47,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-12-16 01:10:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:47,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-16 01:10:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:47,846 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-16 01:10:47,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:47,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998149476] [2021-12-16 01:10:47,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998149476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:10:47,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:10:47,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 01:10:47,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663340354] [2021-12-16 01:10:47,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:10:47,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 01:10:47,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:47,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 01:10:47,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 01:10:47,848 INFO L87 Difference]: Start difference. First operand 12473 states and 16215 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-16 01:10:48,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:48,697 INFO L93 Difference]: Finished difference Result 24021 states and 31326 transitions. [2021-12-16 01:10:48,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 01:10:48,697 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 206 [2021-12-16 01:10:48,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:48,756 INFO L225 Difference]: With dead ends: 24021 [2021-12-16 01:10:48,771 INFO L226 Difference]: Without dead ends: 11817 [2021-12-16 01:10:48,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 01:10:48,799 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 234 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:10:48,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 454 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:10:48,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11817 states. [2021-12-16 01:10:49,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11817 to 11785. [2021-12-16 01:10:49,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11785 states, 8920 states have (on average 1.303811659192825) internal successors, (11630), 8990 states have internal predecessors, (11630), 1845 states have call successors, (1845), 1019 states have call predecessors, (1845), 1019 states have return successors, (1845), 1775 states have call predecessors, (1845), 1845 states have call successors, (1845) [2021-12-16 01:10:49,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11785 states to 11785 states and 15320 transitions. [2021-12-16 01:10:49,570 INFO L78 Accepts]: Start accepts. Automaton has 11785 states and 15320 transitions. Word has length 206 [2021-12-16 01:10:49,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:49,570 INFO L470 AbstractCegarLoop]: Abstraction has 11785 states and 15320 transitions. [2021-12-16 01:10:49,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-16 01:10:49,571 INFO L276 IsEmpty]: Start isEmpty. Operand 11785 states and 15320 transitions. [2021-12-16 01:10:49,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-16 01:10:49,584 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:49,584 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:10:49,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-16 01:10:49,584 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:49,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:49,585 INFO L85 PathProgramCache]: Analyzing trace with hash -999010550, now seen corresponding path program 1 times [2021-12-16 01:10:49,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:49,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95991600] [2021-12-16 01:10:49,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:49,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:49,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:49,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 01:10:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:49,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 01:10:49,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:49,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 01:10:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:49,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 01:10:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:49,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-16 01:10:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:49,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-16 01:10:49,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:49,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-16 01:10:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:49,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-16 01:10:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:49,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-16 01:10:49,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:49,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-16 01:10:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:49,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-12-16 01:10:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:49,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-12-16 01:10:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:49,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-16 01:10:49,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:49,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-12-16 01:10:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:49,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-12-16 01:10:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-16 01:10:49,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:49,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95991600] [2021-12-16 01:10:49,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95991600] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:10:49,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800994334] [2021-12-16 01:10:49,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:49,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:10:49,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:10:49,700 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 01:10:49,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 01:10:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:49,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 01:10:49,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:10:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 8 proven. 115 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-16 01:10:50,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 01:10:50,502 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-16 01:10:50,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800994334] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 01:10:50,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 01:10:50,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2021-12-16 01:10:50,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795817106] [2021-12-16 01:10:50,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 01:10:50,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 01:10:50,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:50,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 01:10:50,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-16 01:10:50,503 INFO L87 Difference]: Start difference. First operand 11785 states and 15320 transitions. Second operand has 10 states, 10 states have (on average 18.7) internal successors, (187), 9 states have internal predecessors, (187), 4 states have call successors, (34), 5 states have call predecessors, (34), 7 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) [2021-12-16 01:10:52,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:52,340 INFO L93 Difference]: Finished difference Result 36730 states and 47908 transitions. [2021-12-16 01:10:52,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-16 01:10:52,341 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.7) internal successors, (187), 9 states have internal predecessors, (187), 4 states have call successors, (34), 5 states have call predecessors, (34), 7 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) Word has length 207 [2021-12-16 01:10:52,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:52,394 INFO L225 Difference]: With dead ends: 36730 [2021-12-16 01:10:52,394 INFO L226 Difference]: Without dead ends: 25380 [2021-12-16 01:10:52,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-12-16 01:10:52,414 INFO L933 BasicCegarLoop]: 402 mSDtfsCounter, 779 mSDsluCounter, 2560 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 2962 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:10:52,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [784 Valid, 2962 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:10:52,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25380 states. [2021-12-16 01:10:53,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25380 to 18325. [2021-12-16 01:10:53,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18325 states, 13994 states have (on average 1.2876947263112763) internal successors, (18020), 14123 states have internal predecessors, (18020), 2752 states have call successors, (2752), 1578 states have call predecessors, (2752), 1578 states have return successors, (2752), 2623 states have call predecessors, (2752), 2752 states have call successors, (2752) [2021-12-16 01:10:53,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18325 states to 18325 states and 23524 transitions. [2021-12-16 01:10:53,904 INFO L78 Accepts]: Start accepts. Automaton has 18325 states and 23524 transitions. Word has length 207 [2021-12-16 01:10:53,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:10:53,905 INFO L470 AbstractCegarLoop]: Abstraction has 18325 states and 23524 transitions. [2021-12-16 01:10:53,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.7) internal successors, (187), 9 states have internal predecessors, (187), 4 states have call successors, (34), 5 states have call predecessors, (34), 7 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) [2021-12-16 01:10:53,905 INFO L276 IsEmpty]: Start isEmpty. Operand 18325 states and 23524 transitions. [2021-12-16 01:10:53,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-16 01:10:53,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:10:53,915 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:10:53,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 01:10:54,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:10:54,128 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:10:54,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:10:54,141 INFO L85 PathProgramCache]: Analyzing trace with hash 261492107, now seen corresponding path program 1 times [2021-12-16 01:10:54,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:10:54,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240516925] [2021-12-16 01:10:54,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:54,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:10:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:54,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:10:54,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:54,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 01:10:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:54,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 01:10:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:54,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 01:10:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:54,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-16 01:10:54,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:54,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-16 01:10:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:54,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-16 01:10:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:54,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-16 01:10:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:54,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-16 01:10:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:54,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-16 01:10:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:54,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-16 01:10:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:54,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-12-16 01:10:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:54,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-12-16 01:10:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:54,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-12-16 01:10:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:54,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-12-16 01:10:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:54,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2021-12-16 01:10:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-16 01:10:54,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:10:54,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240516925] [2021-12-16 01:10:54,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240516925] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:10:54,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143144850] [2021-12-16 01:10:54,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:10:54,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:10:54,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:10:54,308 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 01:10:54,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 01:10:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:10:54,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 01:10:54,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:10:54,736 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 67 proven. 4 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-16 01:10:54,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 01:10:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-16 01:10:55,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143144850] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 01:10:55,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 01:10:55,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2021-12-16 01:10:55,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609727437] [2021-12-16 01:10:55,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 01:10:55,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 01:10:55,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:10:55,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 01:10:55,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 01:10:55,038 INFO L87 Difference]: Start difference. First operand 18325 states and 23524 transitions. Second operand has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 8 states have internal predecessors, (182), 3 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-12-16 01:10:56,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:10:56,936 INFO L93 Difference]: Finished difference Result 42775 states and 56777 transitions. [2021-12-16 01:10:56,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 01:10:56,937 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 8 states have internal predecessors, (182), 3 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 207 [2021-12-16 01:10:56,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:10:56,998 INFO L225 Difference]: With dead ends: 42775 [2021-12-16 01:10:56,998 INFO L226 Difference]: Without dead ends: 24756 [2021-12-16 01:10:57,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 443 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-16 01:10:57,025 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 281 mSDsluCounter, 1859 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 2283 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:10:57,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 2283 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:10:57,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24756 states.