./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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.5.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 0a05a45e59c4449e0f919ee265abbb6a4949f64a9be713d749d79d0baffd63df --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 13:25:39,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 13:25:39,291 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 13:25:39,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 13:25:39,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 13:25:39,323 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 13:25:39,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 13:25:39,340 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 13:25:39,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 13:25:39,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 13:25:39,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 13:25:39,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 13:25:39,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 13:25:39,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 13:25:39,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 13:25:39,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 13:25:39,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 13:25:39,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 13:25:39,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 13:25:39,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 13:25:39,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 13:25:39,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 13:25:39,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 13:25:39,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 13:25:39,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 13:25:39,382 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 13:25:39,382 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 13:25:39,383 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 13:25:39,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 13:25:39,385 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 13:25:39,385 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 13:25:39,386 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 13:25:39,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 13:25:39,387 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 13:25:39,388 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 13:25:39,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 13:25:39,389 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 13:25:39,389 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 13:25:39,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 13:25:39,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 13:25:39,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 13:25:39,391 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 13:25:39,417 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 13:25:39,418 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 13:25:39,419 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 13:25:39,419 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 13:25:39,420 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 13:25:39,420 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 13:25:39,420 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 13:25:39,420 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 13:25:39,420 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 13:25:39,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 13:25:39,421 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 13:25:39,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 13:25:39,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 13:25:39,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 13:25:39,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 13:25:39,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 13:25:39,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 13:25:39,422 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 13:25:39,422 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 13:25:39,422 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 13:25:39,423 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 13:25:39,423 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 13:25:39,423 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 13:25:39,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 13:25:39,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:25:39,423 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 13:25:39,423 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 13:25:39,424 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 13:25:39,424 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 13:25:39,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 13:25:39,424 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 13:25:39,424 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 13:25:39,424 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 13:25:39,425 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 13:25:39,425 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0a05a45e59c4449e0f919ee265abbb6a4949f64a9be713d749d79d0baffd63df [2021-12-21 13:25:39,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 13:25:39,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 13:25:39,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 13:25:39,651 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 13:25:39,651 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 13:25:39,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c [2021-12-21 13:25:39,719 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c256804ad/8d6c6de89311455f9e8857cf8c892068/FLAG04951f086 [2021-12-21 13:25:40,117 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 13:25:40,117 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c [2021-12-21 13:25:40,130 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c256804ad/8d6c6de89311455f9e8857cf8c892068/FLAG04951f086 [2021-12-21 13:25:40,144 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c256804ad/8d6c6de89311455f9e8857cf8c892068 [2021-12-21 13:25:40,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 13:25:40,148 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 13:25:40,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 13:25:40,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 13:25:40,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 13:25:40,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:25:40" (1/1) ... [2021-12-21 13:25:40,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e45d360 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:40, skipping insertion in model container [2021-12-21 13:25:40,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:25:40" (1/1) ... [2021-12-21 13:25:40,160 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 13:25:40,200 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 13:25:40,384 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.5.ufo.UNBOUNDED.pals.c[14577,14590] [2021-12-21 13:25:40,386 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:25:40,391 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 13:25:40,445 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.5.ufo.UNBOUNDED.pals.c[14577,14590] [2021-12-21 13:25:40,456 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:25:40,468 INFO L208 MainTranslator]: Completed translation [2021-12-21 13:25:40,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:40 WrapperNode [2021-12-21 13:25:40,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 13:25:40,470 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 13:25:40,470 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 13:25:40,470 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 13:25:40,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:40" (1/1) ... [2021-12-21 13:25:40,484 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:40" (1/1) ... [2021-12-21 13:25:40,514 INFO L137 Inliner]: procedures = 32, calls = 47, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 536 [2021-12-21 13:25:40,514 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 13:25:40,515 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 13:25:40,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 13:25:40,515 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 13:25:40,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:40" (1/1) ... [2021-12-21 13:25:40,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:40" (1/1) ... [2021-12-21 13:25:40,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:40" (1/1) ... [2021-12-21 13:25:40,538 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:40" (1/1) ... [2021-12-21 13:25:40,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:40" (1/1) ... [2021-12-21 13:25:40,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:40" (1/1) ... [2021-12-21 13:25:40,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:40" (1/1) ... [2021-12-21 13:25:40,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 13:25:40,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 13:25:40,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 13:25:40,577 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 13:25:40,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:40" (1/1) ... [2021-12-21 13:25:40,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:25:40,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:25:40,601 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) [2021-12-21 13:25:40,607 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 [2021-12-21 13:25:40,633 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2021-12-21 13:25:40,633 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2021-12-21 13:25:40,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 13:25:40,633 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2021-12-21 13:25:40,634 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2021-12-21 13:25:40,634 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-12-21 13:25:40,634 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2021-12-21 13:25:40,634 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 13:25:40,634 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 13:25:40,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 13:25:40,634 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2021-12-21 13:25:40,635 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2021-12-21 13:25:40,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 13:25:40,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 13:25:40,635 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2021-12-21 13:25:40,635 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2021-12-21 13:25:40,721 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 13:25:40,722 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 13:25:41,046 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 13:25:41,052 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 13:25:41,052 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 13:25:41,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:25:41 BoogieIcfgContainer [2021-12-21 13:25:41,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 13:25:41,055 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 13:25:41,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 13:25:41,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 13:25:41,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 01:25:40" (1/3) ... [2021-12-21 13:25:41,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c93c7e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:25:41, skipping insertion in model container [2021-12-21 13:25:41,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:40" (2/3) ... [2021-12-21 13:25:41,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c93c7e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:25:41, skipping insertion in model container [2021-12-21 13:25:41,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:25:41" (3/3) ... [2021-12-21 13:25:41,059 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c [2021-12-21 13:25:41,063 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 13:25:41,063 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 13:25:41,093 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 13:25:41,098 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 [2021-12-21 13:25:41,098 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 13:25:41,113 INFO L276 IsEmpty]: Start isEmpty. Operand has 199 states, 162 states have (on average 1.5617283950617284) internal successors, (253), 164 states have internal predecessors, (253), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-21 13:25:41,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 13:25:41,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:41,118 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] [2021-12-21 13:25:41,119 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:41,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:41,122 INFO L85 PathProgramCache]: Analyzing trace with hash 11515241, now seen corresponding path program 1 times [2021-12-21 13:25:41,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:41,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790946161] [2021-12-21 13:25:41,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:41,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 13:25:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:25:41,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:41,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790946161] [2021-12-21 13:25:41,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790946161] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:41,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:41,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 13:25:41,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434930790] [2021-12-21 13:25:41,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:41,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 13:25:41,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:41,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 13:25:41,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 13:25:41,360 INFO L87 Difference]: Start difference. First operand has 199 states, 162 states have (on average 1.5617283950617284) internal successors, (253), 164 states have internal predecessors, (253), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) 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) [2021-12-21 13:25:41,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:41,443 INFO L93 Difference]: Finished difference Result 378 states and 619 transitions. [2021-12-21 13:25:41,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 13:25:41,445 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 [2021-12-21 13:25:41,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:41,462 INFO L225 Difference]: With dead ends: 378 [2021-12-21 13:25:41,464 INFO L226 Difference]: Without dead ends: 195 [2021-12-21 13:25:41,467 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 [2021-12-21 13:25:41,473 INFO L933 BasicCegarLoop]: 298 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, 298 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 [2021-12-21 13:25:41,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:41,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-21 13:25:41,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-12-21 13:25:41,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 159 states have (on average 1.509433962264151) internal successors, (240), 160 states have internal predecessors, (240), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-21 13:25:41,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 298 transitions. [2021-12-21 13:25:41,527 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 298 transitions. Word has length 44 [2021-12-21 13:25:41,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:41,528 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 298 transitions. [2021-12-21 13:25:41,528 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) [2021-12-21 13:25:41,528 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 298 transitions. [2021-12-21 13:25:41,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 13:25:41,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:41,531 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] [2021-12-21 13:25:41,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 13:25:41,532 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:41,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:41,534 INFO L85 PathProgramCache]: Analyzing trace with hash -419952089, now seen corresponding path program 1 times [2021-12-21 13:25:41,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:41,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627830316] [2021-12-21 13:25:41,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:41,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 13:25:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:25:41,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:41,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627830316] [2021-12-21 13:25:41,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627830316] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:41,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:41,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 13:25:41,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86334079] [2021-12-21 13:25:41,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:41,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 13:25:41,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:41,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 13:25:41,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:25:41,641 INFO L87 Difference]: Start difference. First operand 195 states and 298 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) [2021-12-21 13:25:41,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:41,705 INFO L93 Difference]: Finished difference Result 376 states and 570 transitions. [2021-12-21 13:25:41,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 13:25:41,706 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 [2021-12-21 13:25:41,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:41,707 INFO L225 Difference]: With dead ends: 376 [2021-12-21 13:25:41,707 INFO L226 Difference]: Without dead ends: 195 [2021-12-21 13:25:41,708 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 [2021-12-21 13:25:41,709 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 171 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1255 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 [2021-12-21 13:25:41,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 1255 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:41,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-21 13:25:41,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-12-21 13:25:41,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 159 states have (on average 1.4339622641509433) internal successors, (228), 160 states have internal predecessors, (228), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-21 13:25:41,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 286 transitions. [2021-12-21 13:25:41,719 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 286 transitions. Word has length 44 [2021-12-21 13:25:41,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:41,719 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 286 transitions. [2021-12-21 13:25:41,719 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) [2021-12-21 13:25:41,719 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 286 transitions. [2021-12-21 13:25:41,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-21 13:25:41,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:41,720 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] [2021-12-21 13:25:41,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 13:25:41,721 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:41,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:41,721 INFO L85 PathProgramCache]: Analyzing trace with hash -752782365, now seen corresponding path program 1 times [2021-12-21 13:25:41,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:41,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212255572] [2021-12-21 13:25:41,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:41,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:41,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:25:41,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:41,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212255572] [2021-12-21 13:25:41,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212255572] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:41,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:41,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:41,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710886046] [2021-12-21 13:25:41,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:41,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:41,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:41,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:41,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:41,878 INFO L87 Difference]: Start difference. First operand 195 states and 286 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) [2021-12-21 13:25:41,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:41,916 INFO L93 Difference]: Finished difference Result 377 states and 562 transitions. [2021-12-21 13:25:41,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:25:41,916 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 [2021-12-21 13:25:41,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:41,918 INFO L225 Difference]: With dead ends: 377 [2021-12-21 13:25:41,918 INFO L226 Difference]: Without dead ends: 199 [2021-12-21 13:25:41,918 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 [2021-12-21 13:25:41,919 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 5 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 830 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 [2021-12-21 13:25:41,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 830 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:41,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-12-21 13:25:41,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2021-12-21 13:25:41,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 162 states have (on average 1.4259259259259258) internal successors, (231), 163 states have internal predecessors, (231), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-21 13:25:41,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 289 transitions. [2021-12-21 13:25:41,931 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 289 transitions. Word has length 55 [2021-12-21 13:25:41,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:41,932 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 289 transitions. [2021-12-21 13:25:41,932 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) [2021-12-21 13:25:41,932 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 289 transitions. [2021-12-21 13:25:41,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-21 13:25:41,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:41,933 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] [2021-12-21 13:25:41,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 13:25:41,934 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:41,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:41,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1335268689, now seen corresponding path program 1 times [2021-12-21 13:25:41,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:41,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789574599] [2021-12-21 13:25:41,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:41,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:42,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:42,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:42,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-21 13:25:42,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 13:25:42,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:42,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789574599] [2021-12-21 13:25:42,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789574599] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:42,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:42,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:25:42,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562453360] [2021-12-21 13:25:42,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:42,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:25:42,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:42,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:25:42,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:25:42,041 INFO L87 Difference]: Start difference. First operand 199 states and 289 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) [2021-12-21 13:25:42,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:42,075 INFO L93 Difference]: Finished difference Result 543 states and 801 transitions. [2021-12-21 13:25:42,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:25:42,076 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 [2021-12-21 13:25:42,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:42,080 INFO L225 Difference]: With dead ends: 543 [2021-12-21 13:25:42,080 INFO L226 Difference]: Without dead ends: 361 [2021-12-21 13:25:42,081 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 [2021-12-21 13:25:42,087 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 222 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 597 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 [2021-12-21 13:25:42,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 597 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:42,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-12-21 13:25:42,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 352. [2021-12-21 13:25:42,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 280 states have (on average 1.4464285714285714) internal successors, (405), 282 states have internal predecessors, (405), 57 states have call successors, (57), 14 states have call predecessors, (57), 14 states have return successors, (57), 56 states have call predecessors, (57), 57 states have call successors, (57) [2021-12-21 13:25:42,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 519 transitions. [2021-12-21 13:25:42,114 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 519 transitions. Word has length 71 [2021-12-21 13:25:42,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:42,114 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 519 transitions. [2021-12-21 13:25:42,114 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) [2021-12-21 13:25:42,114 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 519 transitions. [2021-12-21 13:25:42,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-21 13:25:42,119 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:42,119 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] [2021-12-21 13:25:42,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 13:25:42,120 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:42,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:42,120 INFO L85 PathProgramCache]: Analyzing trace with hash -900788511, now seen corresponding path program 1 times [2021-12-21 13:25:42,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:42,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733406932] [2021-12-21 13:25:42,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:42,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:42,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:42,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:42,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:25:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:42,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-21 13:25:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 13:25:42,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:42,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733406932] [2021-12-21 13:25:42,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733406932] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:42,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:42,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:25:42,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625886898] [2021-12-21 13:25:42,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:42,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:25:42,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:42,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:25:42,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:25:42,193 INFO L87 Difference]: Start difference. First operand 352 states and 519 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) [2021-12-21 13:25:42,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:42,419 INFO L93 Difference]: Finished difference Result 1012 states and 1519 transitions. [2021-12-21 13:25:42,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 13:25:42,420 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 [2021-12-21 13:25:42,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:42,425 INFO L225 Difference]: With dead ends: 1012 [2021-12-21 13:25:42,425 INFO L226 Difference]: Without dead ends: 677 [2021-12-21 13:25:42,426 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 [2021-12-21 13:25:42,430 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 761 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:42,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 740 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:25:42,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-12-21 13:25:42,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 446. [2021-12-21 13:25:42,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 370 states have (on average 1.4324324324324325) internal successors, (530), 371 states have internal predecessors, (530), 59 states have call successors, (59), 16 states have call predecessors, (59), 16 states have return successors, (59), 58 states have call predecessors, (59), 59 states have call successors, (59) [2021-12-21 13:25:42,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 648 transitions. [2021-12-21 13:25:42,471 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 648 transitions. Word has length 72 [2021-12-21 13:25:42,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:42,473 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 648 transitions. [2021-12-21 13:25:42,473 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) [2021-12-21 13:25:42,473 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 648 transitions. [2021-12-21 13:25:42,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-21 13:25:42,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:42,474 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] [2021-12-21 13:25:42,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 13:25:42,475 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:42,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:42,476 INFO L85 PathProgramCache]: Analyzing trace with hash 763300850, now seen corresponding path program 1 times [2021-12-21 13:25:42,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:42,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270425542] [2021-12-21 13:25:42,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:42,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:42,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:42,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:42,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:25:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:42,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 13:25:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 13:25:42,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:42,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270425542] [2021-12-21 13:25:42,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270425542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:42,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:42,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:25:42,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153432738] [2021-12-21 13:25:42,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:42,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:25:42,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:42,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:25:42,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:25:42,575 INFO L87 Difference]: Start difference. First operand 446 states and 648 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) [2021-12-21 13:25:42,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:42,786 INFO L93 Difference]: Finished difference Result 1014 states and 1519 transitions. [2021-12-21 13:25:42,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 13:25:42,787 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 [2021-12-21 13:25:42,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:42,791 INFO L225 Difference]: With dead ends: 1014 [2021-12-21 13:25:42,791 INFO L226 Difference]: Without dead ends: 679 [2021-12-21 13:25:42,792 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 [2021-12-21 13:25:42,793 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 758 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:42,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [758 Valid, 742 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:25:42,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-12-21 13:25:42,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 450. [2021-12-21 13:25:42,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 374 states have (on average 1.427807486631016) internal successors, (534), 375 states have internal predecessors, (534), 59 states have call successors, (59), 16 states have call predecessors, (59), 16 states have return successors, (59), 58 states have call predecessors, (59), 59 states have call successors, (59) [2021-12-21 13:25:42,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 652 transitions. [2021-12-21 13:25:42,828 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 652 transitions. Word has length 73 [2021-12-21 13:25:42,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:42,828 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 652 transitions. [2021-12-21 13:25:42,829 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) [2021-12-21 13:25:42,829 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 652 transitions. [2021-12-21 13:25:42,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-21 13:25:42,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:42,830 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] [2021-12-21 13:25:42,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 13:25:42,831 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:42,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:42,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1861521472, now seen corresponding path program 1 times [2021-12-21 13:25:42,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:42,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076783053] [2021-12-21 13:25:42,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:42,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:42,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:42,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:42,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:25:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:42,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 13:25:42,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 13:25:42,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:42,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076783053] [2021-12-21 13:25:42,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076783053] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:42,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:42,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:42,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198891270] [2021-12-21 13:25:42,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:42,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:42,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:42,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:42,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:42,921 INFO L87 Difference]: Start difference. First operand 450 states and 652 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) [2021-12-21 13:25:43,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:43,124 INFO L93 Difference]: Finished difference Result 1014 states and 1515 transitions. [2021-12-21 13:25:43,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:25:43,125 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 [2021-12-21 13:25:43,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:43,130 INFO L225 Difference]: With dead ends: 1014 [2021-12-21 13:25:43,130 INFO L226 Difference]: Without dead ends: 679 [2021-12-21 13:25:43,131 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 [2021-12-21 13:25:43,132 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 227 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:43,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 715 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:25:43,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-12-21 13:25:43,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 450. [2021-12-21 13:25:43,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 374 states have (on average 1.4224598930481283) internal successors, (532), 375 states have internal predecessors, (532), 59 states have call successors, (59), 16 states have call predecessors, (59), 16 states have return successors, (59), 58 states have call predecessors, (59), 59 states have call successors, (59) [2021-12-21 13:25:43,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 650 transitions. [2021-12-21 13:25:43,162 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 650 transitions. Word has length 75 [2021-12-21 13:25:43,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:43,164 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 650 transitions. [2021-12-21 13:25:43,164 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) [2021-12-21 13:25:43,164 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 650 transitions. [2021-12-21 13:25:43,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-21 13:25:43,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:43,166 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] [2021-12-21 13:25:43,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 13:25:43,167 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:43,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:43,169 INFO L85 PathProgramCache]: Analyzing trace with hash -559886893, now seen corresponding path program 1 times [2021-12-21 13:25:43,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:43,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373716116] [2021-12-21 13:25:43,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:43,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:43,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:43,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:43,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:25:43,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:43,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:43,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 13:25:43,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:43,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373716116] [2021-12-21 13:25:43,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373716116] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:43,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:43,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:43,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832600127] [2021-12-21 13:25:43,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:43,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:43,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:43,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:43,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:43,275 INFO L87 Difference]: Start difference. First operand 450 states and 650 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) [2021-12-21 13:25:43,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:43,316 INFO L93 Difference]: Finished difference Result 795 states and 1165 transitions. [2021-12-21 13:25:43,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:25:43,316 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 [2021-12-21 13:25:43,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:43,318 INFO L225 Difference]: With dead ends: 795 [2021-12-21 13:25:43,318 INFO L226 Difference]: Without dead ends: 460 [2021-12-21 13:25:43,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:25:43,320 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 6 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 842 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 [2021-12-21 13:25:43,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 842 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:43,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-12-21 13:25:43,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 460. [2021-12-21 13:25:43,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 382 states have (on average 1.4136125654450262) internal successors, (540), 383 states have internal predecessors, (540), 59 states have call successors, (59), 18 states have call predecessors, (59), 18 states have return successors, (59), 58 states have call predecessors, (59), 59 states have call successors, (59) [2021-12-21 13:25:43,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 658 transitions. [2021-12-21 13:25:43,344 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 658 transitions. Word has length 76 [2021-12-21 13:25:43,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:43,344 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 658 transitions. [2021-12-21 13:25:43,344 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) [2021-12-21 13:25:43,345 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 658 transitions. [2021-12-21 13:25:43,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-21 13:25:43,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:43,346 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] [2021-12-21 13:25:43,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 13:25:43,346 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:43,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:43,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1187329977, now seen corresponding path program 1 times [2021-12-21 13:25:43,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:43,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111592308] [2021-12-21 13:25:43,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:43,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:43,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:43,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:43,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:25:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:43,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:43,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:25:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 13:25:43,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:43,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111592308] [2021-12-21 13:25:43,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111592308] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:43,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:43,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:43,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717222749] [2021-12-21 13:25:43,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:43,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:43,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:43,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:43,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:43,416 INFO L87 Difference]: Start difference. First operand 460 states and 658 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) [2021-12-21 13:25:43,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:43,457 INFO L93 Difference]: Finished difference Result 815 states and 1187 transitions. [2021-12-21 13:25:43,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:25:43,457 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 [2021-12-21 13:25:43,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:43,459 INFO L225 Difference]: With dead ends: 815 [2021-12-21 13:25:43,459 INFO L226 Difference]: Without dead ends: 470 [2021-12-21 13:25:43,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:25:43,461 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 6 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 828 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 [2021-12-21 13:25:43,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 828 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:43,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-12-21 13:25:43,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 470. [2021-12-21 13:25:43,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 390 states have (on average 1.405128205128205) internal successors, (548), 391 states have internal predecessors, (548), 59 states have call successors, (59), 20 states have call predecessors, (59), 20 states have return successors, (59), 58 states have call predecessors, (59), 59 states have call successors, (59) [2021-12-21 13:25:43,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 666 transitions. [2021-12-21 13:25:43,485 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 666 transitions. Word has length 84 [2021-12-21 13:25:43,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:43,485 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 666 transitions. [2021-12-21 13:25:43,486 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) [2021-12-21 13:25:43,486 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 666 transitions. [2021-12-21 13:25:43,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-21 13:25:43,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:43,487 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] [2021-12-21 13:25:43,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 13:25:43,487 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:43,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:43,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1492689475, now seen corresponding path program 1 times [2021-12-21 13:25:43,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:43,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867722795] [2021-12-21 13:25:43,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:43,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:43,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:43,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:25:43,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:43,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:43,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:25:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:43,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:25:43,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 13:25:43,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:43,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867722795] [2021-12-21 13:25:43,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867722795] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:43,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:43,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:43,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940388402] [2021-12-21 13:25:43,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:43,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:43,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:43,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:43,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:43,559 INFO L87 Difference]: Start difference. First operand 470 states and 666 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) [2021-12-21 13:25:43,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:43,603 INFO L93 Difference]: Finished difference Result 833 states and 1195 transitions. [2021-12-21 13:25:43,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:25:43,603 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 [2021-12-21 13:25:43,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:43,605 INFO L225 Difference]: With dead ends: 833 [2021-12-21 13:25:43,605 INFO L226 Difference]: Without dead ends: 478 [2021-12-21 13:25:43,606 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 [2021-12-21 13:25:43,607 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 5 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 837 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 [2021-12-21 13:25:43,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 837 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:43,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-12-21 13:25:43,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 478. [2021-12-21 13:25:43,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 396 states have (on average 1.398989898989899) internal successors, (554), 397 states have internal predecessors, (554), 59 states have call successors, (59), 22 states have call predecessors, (59), 22 states have return successors, (59), 58 states have call predecessors, (59), 59 states have call successors, (59) [2021-12-21 13:25:43,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 672 transitions. [2021-12-21 13:25:43,628 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 672 transitions. Word has length 92 [2021-12-21 13:25:43,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:43,628 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 672 transitions. [2021-12-21 13:25:43,628 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) [2021-12-21 13:25:43,628 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 672 transitions. [2021-12-21 13:25:43,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-21 13:25:43,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:43,629 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] [2021-12-21 13:25:43,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 13:25:43,630 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:43,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:43,630 INFO L85 PathProgramCache]: Analyzing trace with hash -405818518, now seen corresponding path program 1 times [2021-12-21 13:25:43,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:43,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385218883] [2021-12-21 13:25:43,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:43,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:43,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:43,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:25:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:43,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:43,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:43,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:25:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:43,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:25:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 13:25:43,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:43,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385218883] [2021-12-21 13:25:43,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385218883] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:43,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:43,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:43,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818838280] [2021-12-21 13:25:43,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:43,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:43,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:43,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:43,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:43,703 INFO L87 Difference]: Start difference. First operand 478 states and 672 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) [2021-12-21 13:25:43,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:43,767 INFO L93 Difference]: Finished difference Result 851 states and 1215 transitions. [2021-12-21 13:25:43,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:25:43,767 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 [2021-12-21 13:25:43,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:43,770 INFO L225 Difference]: With dead ends: 851 [2021-12-21 13:25:43,770 INFO L226 Difference]: Without dead ends: 488 [2021-12-21 13:25:43,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:25:43,771 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 6 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 828 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 [2021-12-21 13:25:43,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 828 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:43,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-12-21 13:25:43,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 488. [2021-12-21 13:25:43,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 404 states have (on average 1.391089108910891) internal successors, (562), 405 states have internal predecessors, (562), 59 states have call successors, (59), 24 states have call predecessors, (59), 24 states have return successors, (59), 58 states have call predecessors, (59), 59 states have call successors, (59) [2021-12-21 13:25:43,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 680 transitions. [2021-12-21 13:25:43,796 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 680 transitions. Word has length 92 [2021-12-21 13:25:43,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:43,796 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 680 transitions. [2021-12-21 13:25:43,796 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) [2021-12-21 13:25:43,796 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 680 transitions. [2021-12-21 13:25:43,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-21 13:25:43,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:43,797 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] [2021-12-21 13:25:43,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 13:25:43,798 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:43,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:43,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1172591310, now seen corresponding path program 1 times [2021-12-21 13:25:43,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:43,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931686691] [2021-12-21 13:25:43,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:43,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:43,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:43,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:43,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:25:43,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:43,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:43,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:25:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:43,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:25:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:43,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 13:25:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:43,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 13:25:43,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:43,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931686691] [2021-12-21 13:25:43,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931686691] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:43,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:43,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:43,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796167501] [2021-12-21 13:25:43,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:43,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:43,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:43,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:43,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:43,886 INFO L87 Difference]: Start difference. First operand 488 states and 680 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) [2021-12-21 13:25:43,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:43,934 INFO L93 Difference]: Finished difference Result 873 states and 1229 transitions. [2021-12-21 13:25:43,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:25:43,935 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 [2021-12-21 13:25:43,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:43,937 INFO L225 Difference]: With dead ends: 873 [2021-12-21 13:25:43,937 INFO L226 Difference]: Without dead ends: 500 [2021-12-21 13:25:43,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:25:43,939 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 7 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 839 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 [2021-12-21 13:25:43,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 839 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:43,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-12-21 13:25:43,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 500. [2021-12-21 13:25:43,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 414 states have (on average 1.3816425120772946) internal successors, (572), 415 states have internal predecessors, (572), 59 states have call successors, (59), 26 states have call predecessors, (59), 26 states have return successors, (59), 58 states have call predecessors, (59), 59 states have call successors, (59) [2021-12-21 13:25:43,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 690 transitions. [2021-12-21 13:25:43,963 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 690 transitions. Word has length 100 [2021-12-21 13:25:43,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:43,963 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 690 transitions. [2021-12-21 13:25:43,964 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) [2021-12-21 13:25:43,964 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 690 transitions. [2021-12-21 13:25:43,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-21 13:25:43,965 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:43,965 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] [2021-12-21 13:25:43,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 13:25:43,965 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:43,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:43,966 INFO L85 PathProgramCache]: Analyzing trace with hash 498895455, now seen corresponding path program 1 times [2021-12-21 13:25:43,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:43,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889241175] [2021-12-21 13:25:43,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:43,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:44,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:25:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:44,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:25:44,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:25:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 13:25:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 13:25:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 13:25:44,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:44,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889241175] [2021-12-21 13:25:44,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889241175] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:44,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:44,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:25:44,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809905772] [2021-12-21 13:25:44,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:44,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:25:44,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:44,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:25:44,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:25:44,114 INFO L87 Difference]: Start difference. First operand 500 states and 690 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) [2021-12-21 13:25:44,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:44,319 INFO L93 Difference]: Finished difference Result 1360 states and 1901 transitions. [2021-12-21 13:25:44,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 13:25:44,320 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 [2021-12-21 13:25:44,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:44,325 INFO L225 Difference]: With dead ends: 1360 [2021-12-21 13:25:44,326 INFO L226 Difference]: Without dead ends: 975 [2021-12-21 13:25:44,327 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 [2021-12-21 13:25:44,328 INFO L933 BasicCegarLoop]: 402 mSDtfsCounter, 383 mSDsluCounter, 1819 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 2221 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:44,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 2221 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:25:44,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-12-21 13:25:44,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 644. [2021-12-21 13:25:44,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 521 states have (on average 1.3723608445297504) internal successors, (715), 523 states have internal predecessors, (715), 83 states have call successors, (83), 39 states have call predecessors, (83), 39 states have return successors, (83), 81 states have call predecessors, (83), 83 states have call successors, (83) [2021-12-21 13:25:44,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 881 transitions. [2021-12-21 13:25:44,374 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 881 transitions. Word has length 103 [2021-12-21 13:25:44,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:44,375 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 881 transitions. [2021-12-21 13:25:44,375 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) [2021-12-21 13:25:44,375 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 881 transitions. [2021-12-21 13:25:44,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-21 13:25:44,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:44,376 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] [2021-12-21 13:25:44,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 13:25:44,377 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:44,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:44,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1291996142, now seen corresponding path program 1 times [2021-12-21 13:25:44,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:44,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146887007] [2021-12-21 13:25:44,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:44,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:44,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:25:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:25:44,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:25:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 13:25:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-21 13:25:44,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 13:25:44,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:44,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146887007] [2021-12-21 13:25:44,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146887007] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:44,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:44,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:44,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58128152] [2021-12-21 13:25:44,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:44,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:44,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:44,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:44,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:44,459 INFO L87 Difference]: Start difference. First operand 644 states and 881 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) [2021-12-21 13:25:44,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:44,520 INFO L93 Difference]: Finished difference Result 1149 states and 1585 transitions. [2021-12-21 13:25:44,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:25:44,521 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 [2021-12-21 13:25:44,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:44,523 INFO L225 Difference]: With dead ends: 1149 [2021-12-21 13:25:44,523 INFO L226 Difference]: Without dead ends: 656 [2021-12-21 13:25:44,524 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 [2021-12-21 13:25:44,525 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 5 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 837 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 [2021-12-21 13:25:44,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 837 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:44,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-12-21 13:25:44,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 656. [2021-12-21 13:25:44,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 530 states have (on average 1.3660377358490565) internal successors, (724), 532 states have internal predecessors, (724), 83 states have call successors, (83), 42 states have call predecessors, (83), 42 states have return successors, (83), 81 states have call predecessors, (83), 83 states have call successors, (83) [2021-12-21 13:25:44,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 890 transitions. [2021-12-21 13:25:44,553 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 890 transitions. Word has length 107 [2021-12-21 13:25:44,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:44,554 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 890 transitions. [2021-12-21 13:25:44,554 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) [2021-12-21 13:25:44,554 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 890 transitions. [2021-12-21 13:25:44,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-21 13:25:44,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:44,555 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] [2021-12-21 13:25:44,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 13:25:44,555 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:44,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:44,556 INFO L85 PathProgramCache]: Analyzing trace with hash 739054211, now seen corresponding path program 1 times [2021-12-21 13:25:44,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:44,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965693925] [2021-12-21 13:25:44,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:44,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:25:44,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:25:44,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:25:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 13:25:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 13:25:44,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,625 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 13:25:44,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:44,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965693925] [2021-12-21 13:25:44,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965693925] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:44,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:44,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 13:25:44,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986658360] [2021-12-21 13:25:44,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:44,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 13:25:44,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:44,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 13:25:44,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:25:44,627 INFO L87 Difference]: Start difference. First operand 656 states and 890 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) [2021-12-21 13:25:44,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:44,702 INFO L93 Difference]: Finished difference Result 921 states and 1302 transitions. [2021-12-21 13:25:44,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 13:25:44,703 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 [2021-12-21 13:25:44,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:44,720 INFO L225 Difference]: With dead ends: 921 [2021-12-21 13:25:44,721 INFO L226 Difference]: Without dead ends: 919 [2021-12-21 13:25:44,721 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 [2021-12-21 13:25:44,722 INFO L933 BasicCegarLoop]: 502 mSDtfsCounter, 261 mSDsluCounter, 1692 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 2194 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:44,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 2194 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:44,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2021-12-21 13:25:44,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 660. [2021-12-21 13:25:44,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 532 states have (on average 1.3646616541353382) internal successors, (726), 535 states have internal predecessors, (726), 84 states have call successors, (84), 43 states have call predecessors, (84), 43 states have return successors, (84), 81 states have call predecessors, (84), 84 states have call successors, (84) [2021-12-21 13:25:44,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 894 transitions. [2021-12-21 13:25:44,754 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 894 transitions. Word has length 106 [2021-12-21 13:25:44,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:44,755 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 894 transitions. [2021-12-21 13:25:44,755 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) [2021-12-21 13:25:44,755 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 894 transitions. [2021-12-21 13:25:44,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-21 13:25:44,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:44,756 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] [2021-12-21 13:25:44,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 13:25:44,756 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:44,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:44,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1139472038, now seen corresponding path program 1 times [2021-12-21 13:25:44,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:44,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728634365] [2021-12-21 13:25:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:44,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:44,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:25:44,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:25:44,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:25:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 13:25:44,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 13:25:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:44,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 13:25:44,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:44,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728634365] [2021-12-21 13:25:44,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728634365] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:44,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:44,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:25:44,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388456489] [2021-12-21 13:25:44,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:44,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:25:44,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:44,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:25:44,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:25:44,833 INFO L87 Difference]: Start difference. First operand 660 states and 894 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) [2021-12-21 13:25:45,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:45,001 INFO L93 Difference]: Finished difference Result 1388 states and 1913 transitions. [2021-12-21 13:25:45,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 13:25:45,001 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 [2021-12-21 13:25:45,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:45,005 INFO L225 Difference]: With dead ends: 1388 [2021-12-21 13:25:45,006 INFO L226 Difference]: Without dead ends: 920 [2021-12-21 13:25:45,008 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 [2021-12-21 13:25:45,008 INFO L933 BasicCegarLoop]: 393 mSDtfsCounter, 503 mSDsluCounter, 1785 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 2178 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:45,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 2178 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:25:45,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-12-21 13:25:45,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 703. [2021-12-21 13:25:45,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 584 states have (on average 1.3595890410958904) internal successors, (794), 589 states have internal predecessors, (794), 76 states have call successors, (76), 42 states have call predecessors, (76), 42 states have return successors, (76), 71 states have call predecessors, (76), 76 states have call successors, (76) [2021-12-21 13:25:45,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 946 transitions. [2021-12-21 13:25:45,073 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 946 transitions. Word has length 109 [2021-12-21 13:25:45,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:45,074 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 946 transitions. [2021-12-21 13:25:45,074 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) [2021-12-21 13:25:45,074 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 946 transitions. [2021-12-21 13:25:45,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-21 13:25:45,079 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:45,080 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] [2021-12-21 13:25:45,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 13:25:45,080 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:45,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:45,080 INFO L85 PathProgramCache]: Analyzing trace with hash 672232165, now seen corresponding path program 1 times [2021-12-21 13:25:45,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:45,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083107023] [2021-12-21 13:25:45,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:45,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:45,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:45,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:25:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:45,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:45,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:25:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:45,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:25:45,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:45,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 13:25:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:45,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 13:25:45,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:45,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-21 13:25:45,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 13:25:45,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:45,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083107023] [2021-12-21 13:25:45,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083107023] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:45,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:45,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:25:45,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453987419] [2021-12-21 13:25:45,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:45,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:25:45,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:45,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:25:45,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:25:45,171 INFO L87 Difference]: Start difference. First operand 703 states and 946 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) [2021-12-21 13:25:45,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:45,327 INFO L93 Difference]: Finished difference Result 1450 states and 1994 transitions. [2021-12-21 13:25:45,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 13:25:45,328 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 [2021-12-21 13:25:45,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:45,331 INFO L225 Difference]: With dead ends: 1450 [2021-12-21 13:25:45,331 INFO L226 Difference]: Without dead ends: 929 [2021-12-21 13:25:45,332 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 [2021-12-21 13:25:45,332 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 367 mSDsluCounter, 1906 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 2330 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:45,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 2330 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:25:45,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-12-21 13:25:45,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 692. [2021-12-21 13:25:45,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 576 states have (on average 1.3576388888888888) internal successors, (782), 581 states have internal predecessors, (782), 74 states have call successors, (74), 41 states have call predecessors, (74), 41 states have return successors, (74), 69 states have call predecessors, (74), 74 states have call successors, (74) [2021-12-21 13:25:45,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 930 transitions. [2021-12-21 13:25:45,371 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 930 transitions. Word has length 111 [2021-12-21 13:25:45,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:45,371 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 930 transitions. [2021-12-21 13:25:45,371 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) [2021-12-21 13:25:45,371 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 930 transitions. [2021-12-21 13:25:45,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-21 13:25:45,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:45,372 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] [2021-12-21 13:25:45,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 13:25:45,372 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:45,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:45,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1990320010, now seen corresponding path program 1 times [2021-12-21 13:25:45,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:45,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624201272] [2021-12-21 13:25:45,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:45,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:45,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:45,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:45,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:25:45,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:45,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:45,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:25:45,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:45,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:25:45,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:45,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 13:25:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:45,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-21 13:25:45,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:45,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 13:25:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:45,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 13:25:45,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:45,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624201272] [2021-12-21 13:25:45,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624201272] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:45,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:45,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:45,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092455222] [2021-12-21 13:25:45,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:45,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:45,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:45,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:45,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:45,430 INFO L87 Difference]: Start difference. First operand 692 states and 930 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) [2021-12-21 13:25:45,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:45,607 INFO L93 Difference]: Finished difference Result 1922 states and 2633 transitions. [2021-12-21 13:25:45,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:25:45,608 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 [2021-12-21 13:25:45,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:45,612 INFO L225 Difference]: With dead ends: 1922 [2021-12-21 13:25:45,612 INFO L226 Difference]: Without dead ends: 1392 [2021-12-21 13:25:45,613 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 [2021-12-21 13:25:45,613 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 424 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:45,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 1043 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:25:45,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2021-12-21 13:25:45,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1154. [2021-12-21 13:25:45,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 938 states have (on average 1.349680170575693) internal successors, (1266), 947 states have internal predecessors, (1266), 140 states have call successors, (140), 75 states have call predecessors, (140), 75 states have return successors, (140), 131 states have call predecessors, (140), 140 states have call successors, (140) [2021-12-21 13:25:45,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1546 transitions. [2021-12-21 13:25:45,684 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1546 transitions. Word has length 112 [2021-12-21 13:25:45,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:45,684 INFO L470 AbstractCegarLoop]: Abstraction has 1154 states and 1546 transitions. [2021-12-21 13:25:45,685 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) [2021-12-21 13:25:45,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1546 transitions. [2021-12-21 13:25:45,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-21 13:25:45,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:45,686 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] [2021-12-21 13:25:45,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 13:25:45,686 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:45,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:45,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1802932996, now seen corresponding path program 1 times [2021-12-21 13:25:45,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:45,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176081275] [2021-12-21 13:25:45,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:45,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:45,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:45,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:45,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:45,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:25:45,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:45,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:25:45,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:45,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 13:25:45,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:45,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-21 13:25:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:45,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 13:25:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 13:25:45,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:45,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176081275] [2021-12-21 13:25:45,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176081275] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:45,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:45,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:25:45,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850019683] [2021-12-21 13:25:45,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:45,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:25:45,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:45,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:25:45,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:25:45,750 INFO L87 Difference]: Start difference. First operand 1154 states and 1546 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 13:25:45,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:45,868 INFO L93 Difference]: Finished difference Result 3024 states and 4036 transitions. [2021-12-21 13:25:45,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:25:45,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 112 [2021-12-21 13:25:45,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:45,875 INFO L225 Difference]: With dead ends: 3024 [2021-12-21 13:25:45,875 INFO L226 Difference]: Without dead ends: 2045 [2021-12-21 13:25:45,877 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 [2021-12-21 13:25:45,878 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 220 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 627 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 [2021-12-21 13:25:45,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 627 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:45,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2021-12-21 13:25:46,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1691. [2021-12-21 13:25:46,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1340 states have (on average 1.3425373134328358) internal successors, (1799), 1355 states have internal predecessors, (1799), 230 states have call successors, (230), 120 states have call predecessors, (230), 120 states have return successors, (230), 215 states have call predecessors, (230), 230 states have call successors, (230) [2021-12-21 13:25:46,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 2259 transitions. [2021-12-21 13:25:46,017 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 2259 transitions. Word has length 112 [2021-12-21 13:25:46,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:46,017 INFO L470 AbstractCegarLoop]: Abstraction has 1691 states and 2259 transitions. [2021-12-21 13:25:46,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 13:25:46,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 2259 transitions. [2021-12-21 13:25:46,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-21 13:25:46,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:46,019 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] [2021-12-21 13:25:46,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 13:25:46,019 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:46,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:46,020 INFO L85 PathProgramCache]: Analyzing trace with hash -225653114, now seen corresponding path program 1 times [2021-12-21 13:25:46,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:46,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271608321] [2021-12-21 13:25:46,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:46,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:46,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:46,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:46,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:46,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:46,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:46,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:25:46,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:46,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:25:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:46,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 13:25:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:46,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-21 13:25:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:46,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 13:25:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 13:25:46,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:46,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271608321] [2021-12-21 13:25:46,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271608321] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:46,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:46,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:25:46,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413729015] [2021-12-21 13:25:46,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:46,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:25:46,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:46,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:25:46,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:25:46,114 INFO L87 Difference]: Start difference. First operand 1691 states and 2259 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) [2021-12-21 13:25:46,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:46,664 INFO L93 Difference]: Finished difference Result 3913 states and 5376 transitions. [2021-12-21 13:25:46,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 13:25:46,664 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 [2021-12-21 13:25:46,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:46,673 INFO L225 Difference]: With dead ends: 3913 [2021-12-21 13:25:46,673 INFO L226 Difference]: Without dead ends: 2493 [2021-12-21 13:25:46,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:25:46,677 INFO L933 BasicCegarLoop]: 668 mSDtfsCounter, 717 mSDsluCounter, 2384 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 3052 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:46,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [723 Valid, 3052 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 13:25:46,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2021-12-21 13:25:46,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 1697. [2021-12-21 13:25:46,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1340 states have (on average 1.3291044776119403) internal successors, (1781), 1356 states have internal predecessors, (1781), 231 states have call successors, (231), 125 states have call predecessors, (231), 125 states have return successors, (231), 215 states have call predecessors, (231), 231 states have call successors, (231) [2021-12-21 13:25:46,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 2243 transitions. [2021-12-21 13:25:46,821 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 2243 transitions. Word has length 112 [2021-12-21 13:25:46,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:46,822 INFO L470 AbstractCegarLoop]: Abstraction has 1697 states and 2243 transitions. [2021-12-21 13:25:46,822 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) [2021-12-21 13:25:46,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 2243 transitions. [2021-12-21 13:25:46,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-21 13:25:46,824 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:46,824 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] [2021-12-21 13:25:46,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 13:25:46,825 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:46,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:46,825 INFO L85 PathProgramCache]: Analyzing trace with hash -2002429441, now seen corresponding path program 1 times [2021-12-21 13:25:46,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:46,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054550870] [2021-12-21 13:25:46,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:46,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:46,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:46,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:25:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:46,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:46,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:46,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:25:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:46,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:25:46,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:46,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 13:25:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:46,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-21 13:25:46,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:46,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 13:25:46,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 13:25:46,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:46,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054550870] [2021-12-21 13:25:46,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054550870] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:46,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:46,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:25:46,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446855935] [2021-12-21 13:25:46,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:46,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:25:46,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:46,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:25:46,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:25:46,921 INFO L87 Difference]: Start difference. First operand 1697 states and 2243 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) [2021-12-21 13:25:47,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:47,493 INFO L93 Difference]: Finished difference Result 4049 states and 5477 transitions. [2021-12-21 13:25:47,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 13:25:47,493 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 [2021-12-21 13:25:47,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:47,502 INFO L225 Difference]: With dead ends: 4049 [2021-12-21 13:25:47,502 INFO L226 Difference]: Without dead ends: 2681 [2021-12-21 13:25:47,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:25:47,506 INFO L933 BasicCegarLoop]: 544 mSDtfsCounter, 780 mSDsluCounter, 1820 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 2364 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:47,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 2364 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 13:25:47,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2681 states. [2021-12-21 13:25:47,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2681 to 1716. [2021-12-21 13:25:47,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1346 states have (on average 1.324665676077266) internal successors, (1783), 1363 states have internal predecessors, (1783), 239 states have call successors, (239), 130 states have call predecessors, (239), 130 states have return successors, (239), 222 states have call predecessors, (239), 239 states have call successors, (239) [2021-12-21 13:25:47,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 2261 transitions. [2021-12-21 13:25:47,680 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 2261 transitions. Word has length 114 [2021-12-21 13:25:47,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:47,680 INFO L470 AbstractCegarLoop]: Abstraction has 1716 states and 2261 transitions. [2021-12-21 13:25:47,680 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) [2021-12-21 13:25:47,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 2261 transitions. [2021-12-21 13:25:47,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-21 13:25:47,682 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:47,682 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] [2021-12-21 13:25:47,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 13:25:47,682 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:47,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:47,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1926273345, now seen corresponding path program 1 times [2021-12-21 13:25:47,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:47,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339180505] [2021-12-21 13:25:47,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:47,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:47,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-21 13:25:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 13:25:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 13:25:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 13:25:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 13:25:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 13:25:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-21 13:25:47,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 13:25:47,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:47,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339180505] [2021-12-21 13:25:47,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339180505] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:47,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:47,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:47,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994338720] [2021-12-21 13:25:47,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:47,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:47,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:47,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:47,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:47,743 INFO L87 Difference]: Start difference. First operand 1716 states and 2261 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) [2021-12-21 13:25:48,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:48,027 INFO L93 Difference]: Finished difference Result 4474 states and 5968 transitions. [2021-12-21 13:25:48,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:25:48,028 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 [2021-12-21 13:25:48,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:48,039 INFO L225 Difference]: With dead ends: 4474 [2021-12-21 13:25:48,039 INFO L226 Difference]: Without dead ends: 3122 [2021-12-21 13:25:48,043 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 [2021-12-21 13:25:48,043 INFO L933 BasicCegarLoop]: 508 mSDtfsCounter, 468 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 1242 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:48,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 1242 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:25:48,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3122 states. [2021-12-21 13:25:48,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3122 to 2645. [2021-12-21 13:25:48,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2038 states have (on average 1.3209028459273797) internal successors, (2692), 2065 states have internal predecessors, (2692), 394 states have call successors, (394), 212 states have call predecessors, (394), 212 states have return successors, (394), 367 states have call predecessors, (394), 394 states have call successors, (394) [2021-12-21 13:25:48,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 3480 transitions. [2021-12-21 13:25:48,247 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 3480 transitions. Word has length 115 [2021-12-21 13:25:48,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:48,248 INFO L470 AbstractCegarLoop]: Abstraction has 2645 states and 3480 transitions. [2021-12-21 13:25:48,248 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) [2021-12-21 13:25:48,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 3480 transitions. [2021-12-21 13:25:48,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-21 13:25:48,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:48,250 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] [2021-12-21 13:25:48,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 13:25:48,250 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:48,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:48,251 INFO L85 PathProgramCache]: Analyzing trace with hash -359185766, now seen corresponding path program 1 times [2021-12-21 13:25:48,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:48,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838122947] [2021-12-21 13:25:48,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:48,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:48,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:48,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:48,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 13:25:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:48,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 13:25:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:48,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-21 13:25:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:48,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 13:25:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:48,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-21 13:25:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:48,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-21 13:25:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:48,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-21 13:25:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 13:25:48,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:48,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838122947] [2021-12-21 13:25:48,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838122947] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:48,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:48,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:25:48,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919714425] [2021-12-21 13:25:48,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:48,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:25:48,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:48,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:25:48,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:25:48,290 INFO L87 Difference]: Start difference. First operand 2645 states and 3480 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2021-12-21 13:25:48,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:48,647 INFO L93 Difference]: Finished difference Result 6356 states and 8732 transitions. [2021-12-21 13:25:48,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:25:48,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 115 [2021-12-21 13:25:48,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:48,661 INFO L225 Difference]: With dead ends: 6356 [2021-12-21 13:25:48,661 INFO L226 Difference]: Without dead ends: 3955 [2021-12-21 13:25:48,666 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 [2021-12-21 13:25:48,667 INFO L933 BasicCegarLoop]: 445 mSDtfsCounter, 151 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:48,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 683 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:25:48,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3955 states. [2021-12-21 13:25:48,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3955 to 2648. [2021-12-21 13:25:48,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 2041 states have (on average 1.3204311611954924) internal successors, (2695), 2068 states have internal predecessors, (2695), 394 states have call successors, (394), 212 states have call predecessors, (394), 212 states have return successors, (394), 367 states have call predecessors, (394), 394 states have call successors, (394) [2021-12-21 13:25:48,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 3483 transitions. [2021-12-21 13:25:48,916 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 3483 transitions. Word has length 115 [2021-12-21 13:25:48,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:48,916 INFO L470 AbstractCegarLoop]: Abstraction has 2648 states and 3483 transitions. [2021-12-21 13:25:48,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2021-12-21 13:25:48,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 3483 transitions. [2021-12-21 13:25:48,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-21 13:25:48,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:48,919 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] [2021-12-21 13:25:48,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 13:25:48,920 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:48,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:48,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1956455983, now seen corresponding path program 1 times [2021-12-21 13:25:48,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:48,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338223224] [2021-12-21 13:25:48,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:48,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:48,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:48,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:48,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 13:25:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:48,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 13:25:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:48,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-21 13:25:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:48,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 13:25:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:48,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-21 13:25:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:48,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-21 13:25:48,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:48,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-21 13:25:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 13:25:48,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:48,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338223224] [2021-12-21 13:25:48,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338223224] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:48,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:48,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:48,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805529947] [2021-12-21 13:25:48,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:48,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:48,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:48,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:48,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:48,984 INFO L87 Difference]: Start difference. First operand 2648 states and 3483 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) [2021-12-21 13:25:49,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:49,340 INFO L93 Difference]: Finished difference Result 6363 states and 8434 transitions. [2021-12-21 13:25:49,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:25:49,341 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 [2021-12-21 13:25:49,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:49,352 INFO L225 Difference]: With dead ends: 6363 [2021-12-21 13:25:49,352 INFO L226 Difference]: Without dead ends: 4210 [2021-12-21 13:25:49,356 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 [2021-12-21 13:25:49,356 INFO L933 BasicCegarLoop]: 541 mSDtfsCounter, 417 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:49,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 1246 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:25:49,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4210 states. [2021-12-21 13:25:49,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4210 to 3626. [2021-12-21 13:25:49,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3626 states, 2780 states have (on average 1.3183453237410072) internal successors, (3665), 2817 states have internal predecessors, (3665), 551 states have call successors, (551), 294 states have call predecessors, (551), 294 states have return successors, (551), 514 states have call predecessors, (551), 551 states have call successors, (551) [2021-12-21 13:25:49,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 4767 transitions. [2021-12-21 13:25:49,614 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 4767 transitions. Word has length 115 [2021-12-21 13:25:49,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:49,614 INFO L470 AbstractCegarLoop]: Abstraction has 3626 states and 4767 transitions. [2021-12-21 13:25:49,615 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) [2021-12-21 13:25:49,615 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 4767 transitions. [2021-12-21 13:25:49,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-21 13:25:49,617 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:49,617 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] [2021-12-21 13:25:49,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-21 13:25:49,618 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:49,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:49,618 INFO L85 PathProgramCache]: Analyzing trace with hash -692474903, now seen corresponding path program 1 times [2021-12-21 13:25:49,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:49,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776331550] [2021-12-21 13:25:49,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:49,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 13:25:49,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 13:25:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 13:25:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-21 13:25:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 13:25:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-21 13:25:49,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-21 13:25:49,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 13:25:49,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:49,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776331550] [2021-12-21 13:25:49,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776331550] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:49,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:49,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:49,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614121077] [2021-12-21 13:25:49,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:49,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:49,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:49,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:49,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:49,689 INFO L87 Difference]: Start difference. First operand 3626 states and 4767 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 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) [2021-12-21 13:25:50,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:50,017 INFO L93 Difference]: Finished difference Result 7543 states and 10134 transitions. [2021-12-21 13:25:50,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:25:50,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 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 [2021-12-21 13:25:50,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:50,035 INFO L225 Difference]: With dead ends: 7543 [2021-12-21 13:25:50,036 INFO L226 Difference]: Without dead ends: 4010 [2021-12-21 13:25:50,042 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 [2021-12-21 13:25:50,043 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 368 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:50,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 860 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:50,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4010 states. [2021-12-21 13:25:50,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4010 to 3152. [2021-12-21 13:25:50,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3152 states, 2383 states have (on average 1.3176668065463701) internal successors, (3140), 2407 states have internal predecessors, (3140), 502 states have call successors, (502), 266 states have call predecessors, (502), 266 states have return successors, (502), 478 states have call predecessors, (502), 502 states have call successors, (502) [2021-12-21 13:25:50,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3152 states to 3152 states and 4144 transitions. [2021-12-21 13:25:50,301 INFO L78 Accepts]: Start accepts. Automaton has 3152 states and 4144 transitions. Word has length 116 [2021-12-21 13:25:50,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:50,301 INFO L470 AbstractCegarLoop]: Abstraction has 3152 states and 4144 transitions. [2021-12-21 13:25:50,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 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) [2021-12-21 13:25:50,301 INFO L276 IsEmpty]: Start isEmpty. Operand 3152 states and 4144 transitions. [2021-12-21 13:25:50,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-21 13:25:50,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:50,303 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] [2021-12-21 13:25:50,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-21 13:25:50,303 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:50,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:50,303 INFO L85 PathProgramCache]: Analyzing trace with hash -962766154, now seen corresponding path program 1 times [2021-12-21 13:25:50,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:50,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912825637] [2021-12-21 13:25:50,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:50,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 13:25:50,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 13:25:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 13:25:50,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-21 13:25:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 13:25:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-21 13:25:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-21 13:25:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 13:25:50,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:50,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912825637] [2021-12-21 13:25:50,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912825637] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:50,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:50,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:25:50,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828579949] [2021-12-21 13:25:50,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:50,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:25:50,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:50,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:25:50,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:25:50,350 INFO L87 Difference]: Start difference. First operand 3152 states and 4144 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) [2021-12-21 13:25:50,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:50,801 INFO L93 Difference]: Finished difference Result 6864 states and 9256 transitions. [2021-12-21 13:25:50,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:25:50,801 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 [2021-12-21 13:25:50,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:50,812 INFO L225 Difference]: With dead ends: 6864 [2021-12-21 13:25:50,813 INFO L226 Difference]: Without dead ends: 3925 [2021-12-21 13:25:50,818 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 [2021-12-21 13:25:50,819 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 151 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 659 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 [2021-12-21 13:25:50,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 659 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:25:50,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3925 states. [2021-12-21 13:25:51,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3925 to 3159. [2021-12-21 13:25:51,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3159 states, 2390 states have (on average 1.3167364016736403) internal successors, (3147), 2414 states have internal predecessors, (3147), 502 states have call successors, (502), 266 states have call predecessors, (502), 266 states have return successors, (502), 478 states have call predecessors, (502), 502 states have call successors, (502) [2021-12-21 13:25:51,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3159 states to 3159 states and 4151 transitions. [2021-12-21 13:25:51,063 INFO L78 Accepts]: Start accepts. Automaton has 3159 states and 4151 transitions. Word has length 118 [2021-12-21 13:25:51,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:51,063 INFO L470 AbstractCegarLoop]: Abstraction has 3159 states and 4151 transitions. [2021-12-21 13:25:51,063 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) [2021-12-21 13:25:51,064 INFO L276 IsEmpty]: Start isEmpty. Operand 3159 states and 4151 transitions. [2021-12-21 13:25:51,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-21 13:25:51,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:51,065 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] [2021-12-21 13:25:51,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-21 13:25:51,065 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:51,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:51,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1404528470, now seen corresponding path program 1 times [2021-12-21 13:25:51,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:51,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304750549] [2021-12-21 13:25:51,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:51,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:51,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 13:25:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 13:25:51,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 13:25:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-21 13:25:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 13:25:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-21 13:25:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-21 13:25:51,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 13:25:51,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:51,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304750549] [2021-12-21 13:25:51,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304750549] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:51,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:51,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:51,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760039069] [2021-12-21 13:25:51,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:51,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:51,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:51,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:51,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:51,124 INFO L87 Difference]: Start difference. First operand 3159 states and 4151 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) [2021-12-21 13:25:51,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:51,422 INFO L93 Difference]: Finished difference Result 6831 states and 9219 transitions. [2021-12-21 13:25:51,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:25:51,423 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 [2021-12-21 13:25:51,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:51,433 INFO L225 Difference]: With dead ends: 6831 [2021-12-21 13:25:51,434 INFO L226 Difference]: Without dead ends: 3818 [2021-12-21 13:25:51,440 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 [2021-12-21 13:25:51,441 INFO L933 BasicCegarLoop]: 344 mSDtfsCounter, 277 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:51,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 872 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:51,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3818 states. [2021-12-21 13:25:51,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3818 to 2901. [2021-12-21 13:25:51,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2901 states, 2191 states have (on average 1.3144682793245093) internal successors, (2880), 2210 states have internal predecessors, (2880), 464 states have call successors, (464), 245 states have call predecessors, (464), 245 states have return successors, (464), 445 states have call predecessors, (464), 464 states have call successors, (464) [2021-12-21 13:25:51,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2901 states to 2901 states and 3808 transitions. [2021-12-21 13:25:51,690 INFO L78 Accepts]: Start accepts. Automaton has 2901 states and 3808 transitions. Word has length 118 [2021-12-21 13:25:51,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:51,690 INFO L470 AbstractCegarLoop]: Abstraction has 2901 states and 3808 transitions. [2021-12-21 13:25:51,690 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) [2021-12-21 13:25:51,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2901 states and 3808 transitions. [2021-12-21 13:25:51,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-21 13:25:51,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:51,695 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] [2021-12-21 13:25:51,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-21 13:25:51,695 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:51,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:51,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1457998733, now seen corresponding path program 1 times [2021-12-21 13:25:51,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:51,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252279485] [2021-12-21 13:25:51,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:51,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:25:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:51,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:25:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:25:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 13:25:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 13:25:51,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-21 13:25:51,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-21 13:25:51,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-21 13:25:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-21 13:25:51,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-21 13:25:51,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-12-21 13:25:51,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-21 13:25:51,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,881 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-21 13:25:51,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:51,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252279485] [2021-12-21 13:25:51,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252279485] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:25:51,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380505401] [2021-12-21 13:25:51,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:51,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:25:51,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:25:51,896 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) [2021-12-21 13:25:51,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 13:25:52,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:52,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 13:25:52,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:25:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 31 proven. 60 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 13:25:52,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:25:52,797 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-21 13:25:52,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380505401] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:25:52,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:25:52,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 19 [2021-12-21 13:25:52,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602487947] [2021-12-21 13:25:52,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:25:52,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-21 13:25:52,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:52,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-21 13:25:52,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-12-21 13:25:52,800 INFO L87 Difference]: Start difference. First operand 2901 states and 3808 transitions. Second operand has 19 states, 19 states have (on average 14.421052631578947) internal successors, (274), 18 states have internal predecessors, (274), 7 states have call successors, (40), 4 states have call predecessors, (40), 6 states have return successors, (39), 8 states have call predecessors, (39), 7 states have call successors, (39) [2021-12-21 13:25:59,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:59,096 INFO L93 Difference]: Finished difference Result 10514 states and 14418 transitions. [2021-12-21 13:25:59,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-12-21 13:25:59,096 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 14.421052631578947) internal successors, (274), 18 states have internal predecessors, (274), 7 states have call successors, (40), 4 states have call predecessors, (40), 6 states have return successors, (39), 8 states have call predecessors, (39), 7 states have call successors, (39) Word has length 185 [2021-12-21 13:25:59,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:59,116 INFO L225 Difference]: With dead ends: 10514 [2021-12-21 13:25:59,116 INFO L226 Difference]: Without dead ends: 7856 [2021-12-21 13:25:59,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 420 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4892 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2387, Invalid=10953, Unknown=0, NotChecked=0, Total=13340 [2021-12-21 13:25:59,124 INFO L933 BasicCegarLoop]: 637 mSDtfsCounter, 5585 mSDsluCounter, 5594 mSDsCounter, 0 mSdLazyCounter, 4727 mSolverCounterSat, 2390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5585 SdHoareTripleChecker+Valid, 6231 SdHoareTripleChecker+Invalid, 7117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2390 IncrementalHoareTripleChecker+Valid, 4727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:59,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5585 Valid, 6231 Invalid, 7117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2390 Valid, 4727 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-21 13:25:59,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7856 states. [2021-12-21 13:25:59,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7856 to 4372. [2021-12-21 13:25:59,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4372 states, 3338 states have (on average 1.3118633912522468) internal successors, (4379), 3363 states have internal predecessors, (4379), 666 states have call successors, (666), 367 states have call predecessors, (666), 367 states have return successors, (666), 641 states have call predecessors, (666), 666 states have call successors, (666) [2021-12-21 13:25:59,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4372 states to 4372 states and 5711 transitions. [2021-12-21 13:25:59,519 INFO L78 Accepts]: Start accepts. Automaton has 4372 states and 5711 transitions. Word has length 185 [2021-12-21 13:25:59,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:59,520 INFO L470 AbstractCegarLoop]: Abstraction has 4372 states and 5711 transitions. [2021-12-21 13:25:59,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 14.421052631578947) internal successors, (274), 18 states have internal predecessors, (274), 7 states have call successors, (40), 4 states have call predecessors, (40), 6 states have return successors, (39), 8 states have call predecessors, (39), 7 states have call successors, (39) [2021-12-21 13:25:59,520 INFO L276 IsEmpty]: Start isEmpty. Operand 4372 states and 5711 transitions. [2021-12-21 13:25:59,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-21 13:25:59,526 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:59,526 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] [2021-12-21 13:25:59,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 13:25:59,744 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 [2021-12-21 13:25:59,745 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:59,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:59,745 INFO L85 PathProgramCache]: Analyzing trace with hash 17651729, now seen corresponding path program 1 times [2021-12-21 13:25:59,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:59,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200670488] [2021-12-21 13:25:59,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:59,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:59,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:59,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:59,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:59,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:59,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:59,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:25:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:59,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:25:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:59,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 13:25:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:59,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 13:25:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:59,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-21 13:25:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:59,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-21 13:25:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:59,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-21 13:25:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:59,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-21 13:25:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:59,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-21 13:25:59,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:59,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-12-21 13:25:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:59,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-21 13:25:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:59,852 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-21 13:25:59,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:59,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200670488] [2021-12-21 13:25:59,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200670488] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:25:59,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380124677] [2021-12-21 13:25:59,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:59,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:25:59,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:25:59,853 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) [2021-12-21 13:25:59,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 13:25:59,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:59,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 13:25:59,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:26:00,406 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-21 13:26:00,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:26:00,776 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-21 13:26:00,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380124677] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:26:00,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:26:00,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2021-12-21 13:26:00,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15801212] [2021-12-21 13:26:00,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:26:00,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 13:26:00,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:00,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 13:26:00,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-21 13:26:00,778 INFO L87 Difference]: Start difference. First operand 4372 states and 5711 transitions. Second operand has 14 states, 14 states have (on average 18.785714285714285) internal successors, (263), 13 states have internal predecessors, (263), 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) [2021-12-21 13:26:03,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:03,549 INFO L93 Difference]: Finished difference Result 11427 states and 15614 transitions. [2021-12-21 13:26:03,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-21 13:26:03,550 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 18.785714285714285) internal successors, (263), 13 states have internal predecessors, (263), 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 [2021-12-21 13:26:03,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:03,569 INFO L225 Difference]: With dead ends: 11427 [2021-12-21 13:26:03,569 INFO L226 Difference]: Without dead ends: 7426 [2021-12-21 13:26:03,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 402 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=749, Invalid=3411, Unknown=0, NotChecked=0, Total=4160 [2021-12-21 13:26:03,577 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 2901 mSDsluCounter, 3949 mSDsCounter, 0 mSdLazyCounter, 1989 mSolverCounterSat, 816 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2901 SdHoareTripleChecker+Valid, 4424 SdHoareTripleChecker+Invalid, 2805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 816 IncrementalHoareTripleChecker+Valid, 1989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:03,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2901 Valid, 4424 Invalid, 2805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [816 Valid, 1989 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 13:26:03,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7426 states. [2021-12-21 13:26:04,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7426 to 4372. [2021-12-21 13:26:04,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4372 states, 3338 states have (on average 1.3067705212702216) internal successors, (4362), 3363 states have internal predecessors, (4362), 666 states have call successors, (666), 367 states have call predecessors, (666), 367 states have return successors, (666), 641 states have call predecessors, (666), 666 states have call successors, (666) [2021-12-21 13:26:04,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4372 states to 4372 states and 5694 transitions. [2021-12-21 13:26:04,136 INFO L78 Accepts]: Start accepts. Automaton has 4372 states and 5694 transitions. Word has length 185 [2021-12-21 13:26:04,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:04,137 INFO L470 AbstractCegarLoop]: Abstraction has 4372 states and 5694 transitions. [2021-12-21 13:26:04,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.785714285714285) internal successors, (263), 13 states have internal predecessors, (263), 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) [2021-12-21 13:26:04,138 INFO L276 IsEmpty]: Start isEmpty. Operand 4372 states and 5694 transitions. [2021-12-21 13:26:04,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-21 13:26:04,143 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:04,143 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:26:04,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 13:26:04,349 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 [2021-12-21 13:26:04,349 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:04,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:04,349 INFO L85 PathProgramCache]: Analyzing trace with hash 264749648, now seen corresponding path program 1 times [2021-12-21 13:26:04,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:04,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233972920] [2021-12-21 13:26:04,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:04,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:04,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:04,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:26:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:04,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:26:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:04,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:26:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:04,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:26:04,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:04,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:26:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:04,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 13:26:04,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:04,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 13:26:04,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:04,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-21 13:26:04,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:04,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-21 13:26:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:04,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-21 13:26:04,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:04,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-21 13:26:04,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:04,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-21 13:26:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:04,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-12-21 13:26:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:04,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-21 13:26:04,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:04,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-21 13:26:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-21 13:26:04,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:04,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233972920] [2021-12-21 13:26:04,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233972920] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:04,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:04,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:26:04,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391166691] [2021-12-21 13:26:04,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:04,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:26:04,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:04,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:26:04,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:26:04,440 INFO L87 Difference]: Start difference. First operand 4372 states and 5694 transitions. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 6 states have internal predecessors, (115), 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) [2021-12-21 13:26:05,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:05,705 INFO L93 Difference]: Finished difference Result 14760 states and 19864 transitions. [2021-12-21 13:26:05,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 13:26:05,706 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 6 states have internal predecessors, (115), 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 194 [2021-12-21 13:26:05,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:05,730 INFO L225 Difference]: With dead ends: 14760 [2021-12-21 13:26:05,730 INFO L226 Difference]: Without dead ends: 10786 [2021-12-21 13:26:05,736 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 [2021-12-21 13:26:05,737 INFO L933 BasicCegarLoop]: 550 mSDtfsCounter, 808 mSDsluCounter, 2408 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 2958 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:05,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [825 Valid, 2958 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:26:05,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10786 states. [2021-12-21 13:26:06,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10786 to 6092. [2021-12-21 13:26:06,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6092 states, 4582 states have (on average 1.304452204277608) internal successors, (5977), 4619 states have internal predecessors, (5977), 986 states have call successors, (986), 523 states have call predecessors, (986), 523 states have return successors, (986), 949 states have call predecessors, (986), 986 states have call successors, (986) [2021-12-21 13:26:06,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6092 states to 6092 states and 7949 transitions. [2021-12-21 13:26:06,325 INFO L78 Accepts]: Start accepts. Automaton has 6092 states and 7949 transitions. Word has length 194 [2021-12-21 13:26:06,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:06,326 INFO L470 AbstractCegarLoop]: Abstraction has 6092 states and 7949 transitions. [2021-12-21 13:26:06,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 6 states have internal predecessors, (115), 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) [2021-12-21 13:26:06,326 INFO L276 IsEmpty]: Start isEmpty. Operand 6092 states and 7949 transitions. [2021-12-21 13:26:06,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-21 13:26:06,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:06,334 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, 1] [2021-12-21 13:26:06,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-21 13:26:06,334 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:06,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:06,334 INFO L85 PathProgramCache]: Analyzing trace with hash 322517035, now seen corresponding path program 1 times [2021-12-21 13:26:06,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:06,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282115499] [2021-12-21 13:26:06,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:06,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:06,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:26:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:06,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:26:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:06,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:26:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:06,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:26:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:06,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:26:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:06,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 13:26:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:06,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 13:26:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:06,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-21 13:26:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:06,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-21 13:26:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:06,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-21 13:26:06,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:06,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-12-21 13:26:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:06,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-12-21 13:26:06,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:06,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-21 13:26:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:06,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-21 13:26:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:06,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2021-12-21 13:26:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:06,462 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-21 13:26:06,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:06,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282115499] [2021-12-21 13:26:06,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282115499] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:26:06,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423970378] [2021-12-21 13:26:06,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:06,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:26:06,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:26:06,480 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) [2021-12-21 13:26:06,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 13:26:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:06,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 13:26:06,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:26:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 13:26:07,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:26:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-21 13:26:07,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423970378] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:26:07,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:26:07,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2021-12-21 13:26:07,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535817731] [2021-12-21 13:26:07,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:26:07,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 13:26:07,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:07,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 13:26:07,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-12-21 13:26:07,356 INFO L87 Difference]: Start difference. First operand 6092 states and 7949 transitions. Second operand has 16 states, 16 states have (on average 18.125) internal successors, (290), 15 states have internal predecessors, (290), 7 states have call successors, (44), 4 states have call predecessors, (44), 6 states have return successors, (43), 8 states have call predecessors, (43), 7 states have call successors, (43) [2021-12-21 13:26:15,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:15,880 INFO L93 Difference]: Finished difference Result 25522 states and 34804 transitions. [2021-12-21 13:26:15,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-12-21 13:26:15,889 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 18.125) internal successors, (290), 15 states have internal predecessors, (290), 7 states have call successors, (44), 4 states have call predecessors, (44), 6 states have return successors, (43), 8 states have call predecessors, (43), 7 states have call successors, (43) Word has length 196 [2021-12-21 13:26:15,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:15,943 INFO L225 Difference]: With dead ends: 25522 [2021-12-21 13:26:15,943 INFO L226 Difference]: Without dead ends: 19828 [2021-12-21 13:26:15,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 473 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8834 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3372, Invalid=18384, Unknown=0, NotChecked=0, Total=21756 [2021-12-21 13:26:15,961 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 11472 mSDsluCounter, 5337 mSDsCounter, 0 mSdLazyCounter, 4102 mSolverCounterSat, 5284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11472 SdHoareTripleChecker+Valid, 6176 SdHoareTripleChecker+Invalid, 9386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5284 IncrementalHoareTripleChecker+Valid, 4102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:15,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11472 Valid, 6176 Invalid, 9386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5284 Valid, 4102 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-21 13:26:15,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19828 states. [2021-12-21 13:26:16,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19828 to 8800. [2021-12-21 13:26:16,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8800 states, 6592 states have (on average 1.2999089805825244) internal successors, (8569), 6647 states have internal predecessors, (8569), 1438 states have call successors, (1438), 769 states have call predecessors, (1438), 769 states have return successors, (1438), 1383 states have call predecessors, (1438), 1438 states have call successors, (1438) [2021-12-21 13:26:16,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8800 states to 8800 states and 11445 transitions. [2021-12-21 13:26:17,002 INFO L78 Accepts]: Start accepts. Automaton has 8800 states and 11445 transitions. Word has length 196 [2021-12-21 13:26:17,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:17,003 INFO L470 AbstractCegarLoop]: Abstraction has 8800 states and 11445 transitions. [2021-12-21 13:26:17,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 18.125) internal successors, (290), 15 states have internal predecessors, (290), 7 states have call successors, (44), 4 states have call predecessors, (44), 6 states have return successors, (43), 8 states have call predecessors, (43), 7 states have call successors, (43) [2021-12-21 13:26:17,003 INFO L276 IsEmpty]: Start isEmpty. Operand 8800 states and 11445 transitions. [2021-12-21 13:26:17,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-21 13:26:17,013 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:17,013 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] [2021-12-21 13:26:17,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 13:26:17,230 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 [2021-12-21 13:26:17,230 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:17,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:17,231 INFO L85 PathProgramCache]: Analyzing trace with hash -607517794, now seen corresponding path program 1 times [2021-12-21 13:26:17,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:17,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578772316] [2021-12-21 13:26:17,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:17,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:26:17,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:26:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 13:26:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 13:26:17,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 13:26:17,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 13:26:17,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-21 13:26:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-21 13:26:17,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-21 13:26:17,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-21 13:26:17,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-21 13:26:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-21 13:26:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-12-21 13:26:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-12-21 13:26:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2021-12-21 13:26:17,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,436 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-21 13:26:17,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:17,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578772316] [2021-12-21 13:26:17,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578772316] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:26:17,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921058210] [2021-12-21 13:26:17,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:17,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:26:17,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:26:17,438 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) [2021-12-21 13:26:17,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 13:26:17,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 13:26:17,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:26:17,914 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 52 proven. 4 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-21 13:26:17,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:26:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-21 13:26:18,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921058210] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:26:18,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:26:18,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2021-12-21 13:26:18,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359461307] [2021-12-21 13:26:18,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:26:18,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 13:26:18,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:18,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 13:26:18,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-12-21 13:26:18,276 INFO L87 Difference]: Start difference. First operand 8800 states and 11445 transitions. Second operand has 17 states, 17 states have (on average 14.529411764705882) internal successors, (247), 16 states have internal predecessors, (247), 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) [2021-12-21 13:26:23,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:23,830 INFO L93 Difference]: Finished difference Result 26193 states and 35896 transitions. [2021-12-21 13:26:23,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-21 13:26:23,830 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 14.529411764705882) internal successors, (247), 16 states have internal predecessors, (247), 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 197 [2021-12-21 13:26:23,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:23,883 INFO L225 Difference]: With dead ends: 26193 [2021-12-21 13:26:23,883 INFO L226 Difference]: Without dead ends: 17713 [2021-12-21 13:26:23,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=662, Invalid=4168, Unknown=0, NotChecked=0, Total=4830 [2021-12-21 13:26:23,899 INFO L933 BasicCegarLoop]: 857 mSDtfsCounter, 2578 mSDsluCounter, 8149 mSDsCounter, 0 mSdLazyCounter, 4836 mSolverCounterSat, 1209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2578 SdHoareTripleChecker+Valid, 9006 SdHoareTripleChecker+Invalid, 6045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1209 IncrementalHoareTripleChecker+Valid, 4836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:23,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2578 Valid, 9006 Invalid, 6045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1209 Valid, 4836 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-21 13:26:23,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17713 states. [2021-12-21 13:26:25,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17713 to 10196. [2021-12-21 13:26:25,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10196 states, 7614 states have (on average 1.2966903073286051) internal successors, (9873), 7679 states have internal predecessors, (9873), 1676 states have call successors, (1676), 905 states have call predecessors, (1676), 905 states have return successors, (1676), 1611 states have call predecessors, (1676), 1676 states have call successors, (1676) [2021-12-21 13:26:25,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10196 states to 10196 states and 13225 transitions. [2021-12-21 13:26:25,343 INFO L78 Accepts]: Start accepts. Automaton has 10196 states and 13225 transitions. Word has length 197 [2021-12-21 13:26:25,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:25,343 INFO L470 AbstractCegarLoop]: Abstraction has 10196 states and 13225 transitions. [2021-12-21 13:26:25,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.529411764705882) internal successors, (247), 16 states have internal predecessors, (247), 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) [2021-12-21 13:26:25,343 INFO L276 IsEmpty]: Start isEmpty. Operand 10196 states and 13225 transitions. [2021-12-21 13:26:25,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-21 13:26:25,354 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:25,355 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:26:25,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-21 13:26:25,568 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 [2021-12-21 13:26:25,568 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:25,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:25,568 INFO L85 PathProgramCache]: Analyzing trace with hash 266392652, now seen corresponding path program 1 times [2021-12-21 13:26:25,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:25,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016809823] [2021-12-21 13:26:25,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:25,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:25,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:26:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:25,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:26:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:25,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 13:26:25,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:25,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 13:26:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:25,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 13:26:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:25,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 13:26:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:25,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-21 13:26:25,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:25,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-21 13:26:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:25,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-21 13:26:25,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:25,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-21 13:26:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:25,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-21 13:26:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:25,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 13:26:25,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:25,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-12-21 13:26:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:25,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-12-21 13:26:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:25,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2021-12-21 13:26:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:25,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2021-12-21 13:26:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-21 13:26:25,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:25,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016809823] [2021-12-21 13:26:25,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016809823] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:26:25,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301875593] [2021-12-21 13:26:25,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:25,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:26:25,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:26:25,711 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) [2021-12-21 13:26:25,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 13:26:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:25,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 13:26:25,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:26:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 74 proven. 4 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-21 13:26:26,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:26:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-21 13:26:26,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301875593] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:26:26,505 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:26:26,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2021-12-21 13:26:26,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388226359] [2021-12-21 13:26:26,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:26:26,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 13:26:26,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:26,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 13:26:26,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-21 13:26:26,509 INFO L87 Difference]: Start difference. First operand 10196 states and 13225 transitions. Second operand has 9 states, 9 states have (on average 20.0) internal successors, (180), 8 states have internal predecessors, (180), 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) [2021-12-21 13:26:28,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:28,681 INFO L93 Difference]: Finished difference Result 24217 states and 32536 transitions. [2021-12-21 13:26:28,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 13:26:28,681 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 20.0) internal successors, (180), 8 states have internal predecessors, (180), 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 205 [2021-12-21 13:26:28,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:28,744 INFO L225 Difference]: With dead ends: 24217 [2021-12-21 13:26:28,744 INFO L226 Difference]: Without dead ends: 14409 [2021-12-21 13:26:28,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 439 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-21 13:26:28,766 INFO L933 BasicCegarLoop]: 418 mSDtfsCounter, 284 mSDsluCounter, 2208 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 2626 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:28,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 2626 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:26:28,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14409 states. [2021-12-21 13:26:30,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14409 to 10196. [2021-12-21 13:26:30,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10196 states, 7614 states have (on average 1.2957709482532178) internal successors, (9866), 7679 states have internal predecessors, (9866), 1676 states have call successors, (1676), 905 states have call predecessors, (1676), 905 states have return successors, (1676), 1611 states have call predecessors, (1676), 1676 states have call successors, (1676) [2021-12-21 13:26:30,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10196 states to 10196 states and 13218 transitions. [2021-12-21 13:26:30,244 INFO L78 Accepts]: Start accepts. Automaton has 10196 states and 13218 transitions. Word has length 205 [2021-12-21 13:26:30,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:30,244 INFO L470 AbstractCegarLoop]: Abstraction has 10196 states and 13218 transitions. [2021-12-21 13:26:30,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.0) internal successors, (180), 8 states have internal predecessors, (180), 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) [2021-12-21 13:26:30,244 INFO L276 IsEmpty]: Start isEmpty. Operand 10196 states and 13218 transitions. [2021-12-21 13:26:30,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-12-21 13:26:30,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:30,254 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 13:26:30,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-21 13:26:30,456 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,SelfDestructingSolverStorable32 [2021-12-21 13:26:30,456 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:30,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:30,456 INFO L85 PathProgramCache]: Analyzing trace with hash -395672383, now seen corresponding path program 1 times [2021-12-21 13:26:30,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:30,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387041513] [2021-12-21 13:26:30,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:30,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:30,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:26:30,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:30,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:26:30,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:30,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 13:26:30,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:30,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 13:26:30,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:30,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 13:26:30,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:30,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 13:26:30,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:30,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 13:26:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:30,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-21 13:26:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:30,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-21 13:26:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:30,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-21 13:26:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:30,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-21 13:26:30,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:30,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-21 13:26:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:30,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-12-21 13:26:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:30,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-21 13:26:30,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:30,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2021-12-21 13:26:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:30,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-12-21 13:26:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:30,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2021-12-21 13:26:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:30,555 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-21 13:26:30,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:30,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387041513] [2021-12-21 13:26:30,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387041513] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:30,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:30,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:26:30,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495046105] [2021-12-21 13:26:30,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:30,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:26:30,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:30,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:26:30,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:26:30,557 INFO L87 Difference]: Start difference. First operand 10196 states and 13218 transitions. Second operand has 5 states, 4 states have (on average 29.5) internal successors, (118), 5 states have internal predecessors, (118), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-21 13:26:31,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:31,311 INFO L93 Difference]: Finished difference Result 16446 states and 21413 transitions. [2021-12-21 13:26:31,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:26:31,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 29.5) internal successors, (118), 5 states have internal predecessors, (118), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 212 [2021-12-21 13:26:31,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:31,328 INFO L225 Difference]: With dead ends: 16446 [2021-12-21 13:26:31,329 INFO L226 Difference]: Without dead ends: 6606 [2021-12-21 13:26:31,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:26:31,346 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 2 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:31,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1122 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:26:31,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6606 states. [2021-12-21 13:26:32,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6606 to 6606. [2021-12-21 13:26:32,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6606 states, 4948 states have (on average 1.2954729183508489) internal successors, (6410), 4989 states have internal predecessors, (6410), 1080 states have call successors, (1080), 577 states have call predecessors, (1080), 577 states have return successors, (1080), 1039 states have call predecessors, (1080), 1080 states have call successors, (1080) [2021-12-21 13:26:32,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6606 states to 6606 states and 8570 transitions. [2021-12-21 13:26:32,185 INFO L78 Accepts]: Start accepts. Automaton has 6606 states and 8570 transitions. Word has length 212 [2021-12-21 13:26:32,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:32,186 INFO L470 AbstractCegarLoop]: Abstraction has 6606 states and 8570 transitions. [2021-12-21 13:26:32,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 29.5) internal successors, (118), 5 states have internal predecessors, (118), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-21 13:26:32,186 INFO L276 IsEmpty]: Start isEmpty. Operand 6606 states and 8570 transitions. [2021-12-21 13:26:32,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-12-21 13:26:32,193 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:32,194 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:26:32,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-21 13:26:32,194 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:32,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:32,194 INFO L85 PathProgramCache]: Analyzing trace with hash -56266143, now seen corresponding path program 1 times [2021-12-21 13:26:32,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:32,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146021345] [2021-12-21 13:26:32,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:32,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:32,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:26:32,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:32,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:26:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:32,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 13:26:32,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:32,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 13:26:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:32,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 13:26:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:32,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 13:26:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:32,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 13:26:32,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:32,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-21 13:26:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:32,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-21 13:26:32,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:32,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-21 13:26:32,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:32,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-21 13:26:32,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:32,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-21 13:26:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:32,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-12-21 13:26:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:32,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-21 13:26:32,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:32,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2021-12-21 13:26:32,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:32,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-12-21 13:26:32,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:32,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2021-12-21 13:26:32,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:32,281 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-21 13:26:32,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:32,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146021345] [2021-12-21 13:26:32,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146021345] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:32,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:32,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:26:32,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382995899] [2021-12-21 13:26:32,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:32,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:26:32,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:32,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:26:32,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:26:32,283 INFO L87 Difference]: Start difference. First operand 6606 states and 8570 transitions. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 13:26:33,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:33,077 INFO L93 Difference]: Finished difference Result 12559 states and 16371 transitions. [2021-12-21 13:26:33,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:26:33,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 212 [2021-12-21 13:26:33,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:33,091 INFO L225 Difference]: With dead ends: 12559 [2021-12-21 13:26:33,092 INFO L226 Difference]: Without dead ends: 6242 [2021-12-21 13:26:33,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:26:33,106 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 277 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:33,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 426 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:26:33,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6242 states. [2021-12-21 13:26:33,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6242 to 6242. [2021-12-21 13:26:33,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6242 states, 4678 states have (on average 1.2967079948696023) internal successors, (6066), 4717 states have internal predecessors, (6066), 1020 states have call successors, (1020), 543 states have call predecessors, (1020), 543 states have return successors, (1020), 981 states have call predecessors, (1020), 1020 states have call successors, (1020) [2021-12-21 13:26:33,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6242 states to 6242 states and 8106 transitions. [2021-12-21 13:26:33,854 INFO L78 Accepts]: Start accepts. Automaton has 6242 states and 8106 transitions. Word has length 212 [2021-12-21 13:26:33,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:33,854 INFO L470 AbstractCegarLoop]: Abstraction has 6242 states and 8106 transitions. [2021-12-21 13:26:33,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 13:26:33,854 INFO L276 IsEmpty]: Start isEmpty. Operand 6242 states and 8106 transitions. [2021-12-21 13:26:33,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-12-21 13:26:33,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:33,861 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:26:33,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-21 13:26:33,861 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:33,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:33,861 INFO L85 PathProgramCache]: Analyzing trace with hash 598590481, now seen corresponding path program 1 times [2021-12-21 13:26:33,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:33,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450676459] [2021-12-21 13:26:33,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:33,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:33,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:33,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:26:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:33,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:26:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:33,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:26:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:33,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:26:33,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:33,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:26:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:33,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 13:26:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:33,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-21 13:26:33,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:33,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 13:26:33,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:33,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-21 13:26:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:33,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 13:26:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:33,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-21 13:26:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:33,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-21 13:26:33,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:33,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-21 13:26:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:33,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2021-12-21 13:26:33,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:33,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-12-21 13:26:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:33,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-12-21 13:26:33,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:33,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2021-12-21 13:26:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:33,939 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-21 13:26:33,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:33,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450676459] [2021-12-21 13:26:33,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450676459] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:33,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:33,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:26:33,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524952564] [2021-12-21 13:26:33,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:33,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:26:33,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:33,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:26:33,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:26:33,941 INFO L87 Difference]: Start difference. First operand 6242 states and 8106 transitions. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-21 13:26:34,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:34,720 INFO L93 Difference]: Finished difference Result 11965 states and 15594 transitions. [2021-12-21 13:26:34,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:26:34,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 214 [2021-12-21 13:26:34,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:34,731 INFO L225 Difference]: With dead ends: 11965 [2021-12-21 13:26:34,732 INFO L226 Difference]: Without dead ends: 5930 [2021-12-21 13:26:34,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:26:34,740 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 277 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:34,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 428 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:26:34,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5930 states. [2021-12-21 13:26:35,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5930 to 5772. [2021-12-21 13:26:35,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5772 states, 4324 states have (on average 1.299722479185939) internal successors, (5620), 4360 states have internal predecessors, (5620), 943 states have call successors, (943), 504 states have call predecessors, (943), 504 states have return successors, (943), 907 states have call predecessors, (943), 943 states have call successors, (943) [2021-12-21 13:26:35,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5772 states to 5772 states and 7506 transitions. [2021-12-21 13:26:35,542 INFO L78 Accepts]: Start accepts. Automaton has 5772 states and 7506 transitions. Word has length 214 [2021-12-21 13:26:35,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:35,542 INFO L470 AbstractCegarLoop]: Abstraction has 5772 states and 7506 transitions. [2021-12-21 13:26:35,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-21 13:26:35,543 INFO L276 IsEmpty]: Start isEmpty. Operand 5772 states and 7506 transitions. [2021-12-21 13:26:35,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-12-21 13:26:35,549 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:35,549 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 13:26:35,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-21 13:26:35,549 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:35,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:35,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1490841889, now seen corresponding path program 1 times [2021-12-21 13:26:35,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:35,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997515854] [2021-12-21 13:26:35,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:35,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:35,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:26:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:35,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:26:35,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:35,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 13:26:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:35,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 13:26:35,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:35,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 13:26:35,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:35,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 13:26:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:35,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 13:26:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:35,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-21 13:26:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:35,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-21 13:26:35,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:35,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-21 13:26:35,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:35,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-21 13:26:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:35,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-21 13:26:35,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:35,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2021-12-21 13:26:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:35,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-12-21 13:26:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:35,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2021-12-21 13:26:35,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:35,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2021-12-21 13:26:35,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:35,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-12-21 13:26:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:35,760 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 29 proven. 19 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-21 13:26:35,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:35,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997515854] [2021-12-21 13:26:35,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997515854] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:26:35,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906673403] [2021-12-21 13:26:35,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:35,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:26:35,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:26:35,762 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) [2021-12-21 13:26:35,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 13:26:35,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:35,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-21 13:26:35,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:26:36,574 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 82 proven. 27 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 13:26:36,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:26:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 29 proven. 19 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-21 13:26:37,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906673403] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:26:37,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:26:37,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 25 [2021-12-21 13:26:37,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812139964] [2021-12-21 13:26:37,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:26:37,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-21 13:26:37,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:37,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-21 13:26:37,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-12-21 13:26:37,034 INFO L87 Difference]: Start difference. First operand 5772 states and 7506 transitions. Second operand has 25 states, 25 states have (on average 12.96) internal successors, (324), 25 states have internal predecessors, (324), 9 states have call successors, (46), 5 states have call predecessors, (46), 5 states have return successors, (45), 9 states have call predecessors, (45), 9 states have call successors, (45)