./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.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.4_1.ufo.BOUNDED-10.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 a30aa210ed4a7c8ee647a70aef136aef282e5eccb07388ecda6495e33bc30b6d --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 13:25:26,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 13:25:26,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 13:25:26,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 13:25:26,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 13:25:26,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 13:25:26,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 13:25:26,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 13:25:26,189 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 13:25:26,190 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 13:25:26,190 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 13:25:26,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 13:25:26,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 13:25:26,197 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 13:25:26,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 13:25:26,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 13:25:26,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 13:25:26,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 13:25:26,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 13:25:26,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 13:25:26,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 13:25:26,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 13:25:26,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 13:25:26,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 13:25:26,217 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 13:25:26,218 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 13:25:26,218 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 13:25:26,219 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 13:25:26,220 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 13:25:26,220 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 13:25:26,221 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 13:25:26,221 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 13:25:26,223 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 13:25:26,224 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 13:25:26,225 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 13:25:26,225 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 13:25:26,225 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 13:25:26,225 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 13:25:26,226 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 13:25:26,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 13:25:26,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 13:25:26,231 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 13:25:26,251 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 13:25:26,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 13:25:26,251 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 13:25:26,252 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 13:25:26,252 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 13:25:26,252 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 13:25:26,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 13:25:26,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 13:25:26,253 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 13:25:26,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 13:25:26,254 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 13:25:26,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 13:25:26,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 13:25:26,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 13:25:26,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 13:25:26,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 13:25:26,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 13:25:26,255 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 13:25:26,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 13:25:26,255 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 13:25:26,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 13:25:26,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 13:25:26,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 13:25:26,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 13:25:26,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:25:26,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 13:25:26,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 13:25:26,257 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 13:25:26,257 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 13:25:26,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 13:25:26,257 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 13:25:26,258 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 13:25:26,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 13:25:26,258 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 13:25:26,258 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a30aa210ed4a7c8ee647a70aef136aef282e5eccb07388ecda6495e33bc30b6d [2021-12-21 13:25:26,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 13:25:26,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 13:25:26,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 13:25:26,529 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 13:25:26,530 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 13:25:26,530 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c [2021-12-21 13:25:26,591 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbb42a197/d5712f9dff56488da8048d498f95ee26/FLAGd0b721e93 [2021-12-21 13:25:27,005 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 13:25:27,006 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c [2021-12-21 13:25:27,017 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbb42a197/d5712f9dff56488da8048d498f95ee26/FLAGd0b721e93 [2021-12-21 13:25:27,031 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbb42a197/d5712f9dff56488da8048d498f95ee26 [2021-12-21 13:25:27,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 13:25:27,035 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 13:25:27,038 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 13:25:27,038 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 13:25:27,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 13:25:27,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:25:27" (1/1) ... [2021-12-21 13:25:27,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fdf24d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:27, skipping insertion in model container [2021-12-21 13:25:27,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:25:27" (1/1) ... [2021-12-21 13:25:27,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 13:25:27,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 13:25:27,378 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.4_1.ufo.BOUNDED-10.pals.c[14540,14553] [2021-12-21 13:25:27,380 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:25:27,395 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 13:25:27,450 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.4_1.ufo.BOUNDED-10.pals.c[14540,14553] [2021-12-21 13:25:27,458 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:25:27,470 INFO L208 MainTranslator]: Completed translation [2021-12-21 13:25:27,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:27 WrapperNode [2021-12-21 13:25:27,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 13:25:27,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 13:25:27,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 13:25:27,472 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 13:25:27,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:27" (1/1) ... [2021-12-21 13:25:27,498 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:27" (1/1) ... [2021-12-21 13:25:27,551 INFO L137 Inliner]: procedures = 32, calls = 48, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 533 [2021-12-21 13:25:27,552 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 13:25:27,553 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 13:25:27,553 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 13:25:27,553 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 13:25:27,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:27" (1/1) ... [2021-12-21 13:25:27,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:27" (1/1) ... [2021-12-21 13:25:27,581 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:27" (1/1) ... [2021-12-21 13:25:27,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:27" (1/1) ... [2021-12-21 13:25:27,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:27" (1/1) ... [2021-12-21 13:25:27,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:27" (1/1) ... [2021-12-21 13:25:27,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:27" (1/1) ... [2021-12-21 13:25:27,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 13:25:27,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 13:25:27,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 13:25:27,632 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 13:25:27,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:27" (1/1) ... [2021-12-21 13:25:27,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:25:27,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:25:27,677 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 13:25:27,697 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 13:25:27,714 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2021-12-21 13:25:27,714 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2021-12-21 13:25:27,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 13:25:27,714 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2021-12-21 13:25:27,714 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2021-12-21 13:25:27,715 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-12-21 13:25:27,715 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2021-12-21 13:25:27,715 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2021-12-21 13:25:27,715 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2021-12-21 13:25:27,715 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 13:25:27,715 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 13:25:27,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 13:25:27,716 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2021-12-21 13:25:27,716 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2021-12-21 13:25:27,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 13:25:27,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 13:25:27,717 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2021-12-21 13:25:27,717 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2021-12-21 13:25:27,832 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 13:25:27,833 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 13:25:28,238 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 13:25:28,246 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 13:25:28,246 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 13:25:28,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:25:28 BoogieIcfgContainer [2021-12-21 13:25:28,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 13:25:28,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 13:25:28,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 13:25:28,262 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 13:25:28,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 01:25:27" (1/3) ... [2021-12-21 13:25:28,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49db844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:25:28, skipping insertion in model container [2021-12-21 13:25:28,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:27" (2/3) ... [2021-12-21 13:25:28,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49db844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:25:28, skipping insertion in model container [2021-12-21 13:25:28,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:25:28" (3/3) ... [2021-12-21 13:25:28,264 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c [2021-12-21 13:25:28,268 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 13:25:28,269 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 13:25:28,305 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 13:25:28,310 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 13:25:28,310 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 13:25:28,326 INFO L276 IsEmpty]: Start isEmpty. Operand has 205 states, 165 states have (on average 1.5454545454545454) internal successors, (255), 166 states have internal predecessors, (255), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-21 13:25:28,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 13:25:28,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:28,332 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 13:25:28,333 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:28,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:28,337 INFO L85 PathProgramCache]: Analyzing trace with hash 255328600, now seen corresponding path program 1 times [2021-12-21 13:25:28,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:28,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281337278] [2021-12-21 13:25:28,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:28,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:28,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 13:25:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:28,496 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 13:25:28,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:28,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281337278] [2021-12-21 13:25:28,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281337278] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:28,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:28,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 13:25:28,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308304841] [2021-12-21 13:25:28,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:28,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 13:25:28,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:28,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 13:25:28,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 13:25:28,536 INFO L87 Difference]: Start difference. First operand has 205 states, 165 states have (on average 1.5454545454545454) internal successors, (255), 166 states have internal predecessors, (255), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 13:25:28,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:28,604 INFO L93 Difference]: Finished difference Result 394 states and 634 transitions. [2021-12-21 13:25:28,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 13:25:28,606 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 13:25:28,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:28,615 INFO L225 Difference]: With dead ends: 394 [2021-12-21 13:25:28,615 INFO L226 Difference]: Without dead ends: 201 [2021-12-21 13:25:28,619 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 13:25:28,622 INFO L933 BasicCegarLoop]: 308 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, 308 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 13:25:28,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:28,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-21 13:25:28,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2021-12-21 13:25:28,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 162 states have (on average 1.4938271604938271) internal successors, (242), 162 states have internal predecessors, (242), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-21 13:25:28,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 304 transitions. [2021-12-21 13:25:28,667 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 304 transitions. Word has length 44 [2021-12-21 13:25:28,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:28,667 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 304 transitions. [2021-12-21 13:25:28,667 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 13:25:28,668 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 304 transitions. [2021-12-21 13:25:28,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 13:25:28,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:28,670 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 13:25:28,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 13:25:28,670 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:28,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:28,671 INFO L85 PathProgramCache]: Analyzing trace with hash 246563096, now seen corresponding path program 1 times [2021-12-21 13:25:28,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:28,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368675889] [2021-12-21 13:25:28,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:28,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:28,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 13:25:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:28,804 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 13:25:28,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:28,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368675889] [2021-12-21 13:25:28,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368675889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:28,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:28,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 13:25:28,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461542722] [2021-12-21 13:25:28,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:28,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 13:25:28,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:28,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 13:25:28,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:25:28,810 INFO L87 Difference]: Start difference. First operand 201 states and 304 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 13:25:28,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:28,965 INFO L93 Difference]: Finished difference Result 525 states and 799 transitions. [2021-12-21 13:25:28,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 13:25:28,967 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 13:25:28,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:28,976 INFO L225 Difference]: With dead ends: 525 [2021-12-21 13:25:28,976 INFO L226 Difference]: Without dead ends: 338 [2021-12-21 13:25:28,981 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 13:25:28,984 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 167 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1566 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:28,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 1566 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:25:28,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-12-21 13:25:29,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 201. [2021-12-21 13:25:29,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 162 states have (on average 1.4197530864197532) internal successors, (230), 162 states have internal predecessors, (230), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-21 13:25:29,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 292 transitions. [2021-12-21 13:25:29,026 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 292 transitions. Word has length 44 [2021-12-21 13:25:29,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:29,027 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 292 transitions. [2021-12-21 13:25:29,028 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 13:25:29,028 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 292 transitions. [2021-12-21 13:25:29,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-21 13:25:29,031 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:29,031 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 13:25:29,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 13:25:29,031 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:29,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:29,032 INFO L85 PathProgramCache]: Analyzing trace with hash -428937283, now seen corresponding path program 1 times [2021-12-21 13:25:29,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:29,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752382834] [2021-12-21 13:25:29,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:29,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:29,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:29,222 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 13:25:29,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:29,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752382834] [2021-12-21 13:25:29,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752382834] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:29,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:29,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:29,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264239789] [2021-12-21 13:25:29,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:29,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:29,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:29,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:29,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:29,225 INFO L87 Difference]: Start difference. First operand 201 states and 292 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 13:25:29,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:29,261 INFO L93 Difference]: Finished difference Result 389 states and 574 transitions. [2021-12-21 13:25:29,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:25:29,262 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 13:25:29,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:29,264 INFO L225 Difference]: With dead ends: 389 [2021-12-21 13:25:29,264 INFO L226 Difference]: Without dead ends: 205 [2021-12-21 13:25:29,265 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 13:25:29,266 INFO L933 BasicCegarLoop]: 286 mSDtfsCounter, 5 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 848 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 13:25:29,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 848 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:29,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-21 13:25:29,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2021-12-21 13:25:29,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 165 states have (on average 1.412121212121212) internal successors, (233), 165 states have internal predecessors, (233), 31 states have call successors, (31), 8 states have call predecessors, (31), 8 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-21 13:25:29,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 295 transitions. [2021-12-21 13:25:29,292 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 295 transitions. Word has length 55 [2021-12-21 13:25:29,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:29,292 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 295 transitions. [2021-12-21 13:25:29,293 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 13:25:29,293 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 295 transitions. [2021-12-21 13:25:29,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-21 13:25:29,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:29,304 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 13:25:29,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 13:25:29,305 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:29,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:29,306 INFO L85 PathProgramCache]: Analyzing trace with hash 544058639, now seen corresponding path program 1 times [2021-12-21 13:25:29,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:29,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843133218] [2021-12-21 13:25:29,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:29,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:29,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:29,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:29,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-21 13:25:29,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:29,387 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 13:25:29,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:29,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843133218] [2021-12-21 13:25:29,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843133218] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:29,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:29,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:25:29,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070452383] [2021-12-21 13:25:29,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:29,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:25:29,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:29,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:25:29,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:25:29,390 INFO L87 Difference]: Start difference. First operand 205 states and 295 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 13:25:29,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:29,425 INFO L93 Difference]: Finished difference Result 558 states and 814 transitions. [2021-12-21 13:25:29,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:25:29,425 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 13:25:29,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:29,428 INFO L225 Difference]: With dead ends: 558 [2021-12-21 13:25:29,428 INFO L226 Difference]: Without dead ends: 370 [2021-12-21 13:25:29,429 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 13:25:29,430 INFO L933 BasicCegarLoop]: 337 mSDtfsCounter, 223 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 614 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 13:25:29,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 614 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:29,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-12-21 13:25:29,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 360. [2021-12-21 13:25:29,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 283 states have (on average 1.431095406360424) internal successors, (405), 284 states have internal predecessors, (405), 60 states have call successors, (60), 16 states have call predecessors, (60), 16 states have return successors, (60), 59 states have call predecessors, (60), 60 states have call successors, (60) [2021-12-21 13:25:29,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 525 transitions. [2021-12-21 13:25:29,450 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 525 transitions. Word has length 71 [2021-12-21 13:25:29,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:29,451 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 525 transitions. [2021-12-21 13:25:29,451 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 13:25:29,451 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 525 transitions. [2021-12-21 13:25:29,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-21 13:25:29,453 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:29,453 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 13:25:29,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 13:25:29,453 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:29,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:29,454 INFO L85 PathProgramCache]: Analyzing trace with hash -729077, now seen corresponding path program 1 times [2021-12-21 13:25:29,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:29,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642467832] [2021-12-21 13:25:29,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:29,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:29,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:29,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:29,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:29,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:29,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:29,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-21 13:25:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:29,522 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 13:25:29,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:29,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642467832] [2021-12-21 13:25:29,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642467832] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:29,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:29,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:25:29,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57826238] [2021-12-21 13:25:29,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:29,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:25:29,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:29,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:25:29,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:25:29,525 INFO L87 Difference]: Start difference. First operand 360 states and 525 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 13:25:29,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:29,574 INFO L93 Difference]: Finished difference Result 997 states and 1468 transitions. [2021-12-21 13:25:29,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:25:29,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 72 [2021-12-21 13:25:29,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:29,579 INFO L225 Difference]: With dead ends: 997 [2021-12-21 13:25:29,580 INFO L226 Difference]: Without dead ends: 654 [2021-12-21 13:25:29,581 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 13:25:29,582 INFO L933 BasicCegarLoop]: 370 mSDtfsCounter, 231 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 649 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 13:25:29,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 649 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:29,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-12-21 13:25:29,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 637. [2021-12-21 13:25:29,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 488 states have (on average 1.4487704918032787) internal successors, (707), 491 states have internal predecessors, (707), 117 states have call successors, (117), 31 states have call predecessors, (117), 31 states have return successors, (117), 114 states have call predecessors, (117), 117 states have call successors, (117) [2021-12-21 13:25:29,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 941 transitions. [2021-12-21 13:25:29,636 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 941 transitions. Word has length 72 [2021-12-21 13:25:29,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:29,638 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 941 transitions. [2021-12-21 13:25:29,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 13:25:29,638 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 941 transitions. [2021-12-21 13:25:29,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-21 13:25:29,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:29,642 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 13:25:29,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 13:25:29,643 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:29,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:29,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1280592755, now seen corresponding path program 1 times [2021-12-21 13:25:29,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:29,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922339072] [2021-12-21 13:25:29,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:29,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:29,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:29,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:29,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-21 13:25:29,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:29,776 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 13:25:29,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:29,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922339072] [2021-12-21 13:25:29,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922339072] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:29,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:29,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:25:29,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290582481] [2021-12-21 13:25:29,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:29,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:25:29,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:29,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:25:29,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:25:29,779 INFO L87 Difference]: Start difference. First operand 637 states and 941 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 13:25:30,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:30,090 INFO L93 Difference]: Finished difference Result 1785 states and 2683 transitions. [2021-12-21 13:25:30,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 13:25:30,091 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 13:25:30,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:30,099 INFO L225 Difference]: With dead ends: 1785 [2021-12-21 13:25:30,099 INFO L226 Difference]: Without dead ends: 1165 [2021-12-21 13:25:30,102 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 13:25:30,103 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 770 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:30,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [770 Valid, 776 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:25:30,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-12-21 13:25:30,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 762. [2021-12-21 13:25:30,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 600 states have (on average 1.4283333333333332) internal successors, (857), 603 states have internal predecessors, (857), 124 states have call successors, (124), 37 states have call predecessors, (124), 37 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-12-21 13:25:30,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1105 transitions. [2021-12-21 13:25:30,186 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1105 transitions. Word has length 72 [2021-12-21 13:25:30,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:30,186 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 1105 transitions. [2021-12-21 13:25:30,187 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 13:25:30,187 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1105 transitions. [2021-12-21 13:25:30,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-21 13:25:30,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:30,189 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 13:25:30,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 13:25:30,189 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:30,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:30,190 INFO L85 PathProgramCache]: Analyzing trace with hash 740165986, now seen corresponding path program 1 times [2021-12-21 13:25:30,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:30,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651861134] [2021-12-21 13:25:30,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:30,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:30,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:30,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:30,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 13:25:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:30,263 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 13:25:30,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:30,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651861134] [2021-12-21 13:25:30,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651861134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:30,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:30,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:25:30,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896741413] [2021-12-21 13:25:30,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:30,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:25:30,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:30,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:25:30,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:25:30,266 INFO L87 Difference]: Start difference. First operand 762 states and 1105 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 13:25:30,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:30,569 INFO L93 Difference]: Finished difference Result 1785 states and 2675 transitions. [2021-12-21 13:25:30,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 13:25:30,570 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 13:25:30,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:30,578 INFO L225 Difference]: With dead ends: 1785 [2021-12-21 13:25:30,578 INFO L226 Difference]: Without dead ends: 1165 [2021-12-21 13:25:30,581 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 13:25:30,582 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 766 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:30,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [766 Valid, 779 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:25:30,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-12-21 13:25:30,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 762. [2021-12-21 13:25:30,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 600 states have (on average 1.4216666666666666) internal successors, (853), 603 states have internal predecessors, (853), 124 states have call successors, (124), 37 states have call predecessors, (124), 37 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-12-21 13:25:30,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1101 transitions. [2021-12-21 13:25:30,646 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1101 transitions. Word has length 73 [2021-12-21 13:25:30,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:30,647 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 1101 transitions. [2021-12-21 13:25:30,647 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 13:25:30,648 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1101 transitions. [2021-12-21 13:25:30,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-21 13:25:30,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:30,651 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] [2021-12-21 13:25:30,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 13:25:30,655 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:30,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:30,656 INFO L85 PathProgramCache]: Analyzing trace with hash -2060570112, now seen corresponding path program 1 times [2021-12-21 13:25:30,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:30,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539406886] [2021-12-21 13:25:30,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:30,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:30,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:30,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:30,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:30,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:30,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:30,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 13:25:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:30,765 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 13:25:30,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:30,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539406886] [2021-12-21 13:25:30,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539406886] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:30,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:30,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:30,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477118324] [2021-12-21 13:25:30,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:30,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:30,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:30,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:30,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:30,768 INFO L87 Difference]: Start difference. First operand 762 states and 1101 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 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 13:25:30,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:30,837 INFO L93 Difference]: Finished difference Result 1402 states and 2052 transitions. [2021-12-21 13:25:30,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:25:30,838 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 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 74 [2021-12-21 13:25:30,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:30,842 INFO L225 Difference]: With dead ends: 1402 [2021-12-21 13:25:30,842 INFO L226 Difference]: Without dead ends: 782 [2021-12-21 13:25:30,844 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 13:25:30,845 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 6 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 860 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 13:25:30,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 860 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:30,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-12-21 13:25:30,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 782. [2021-12-21 13:25:30,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 616 states have (on average 1.4107142857142858) internal successors, (869), 619 states have internal predecessors, (869), 124 states have call successors, (124), 41 states have call predecessors, (124), 41 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-12-21 13:25:30,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1117 transitions. [2021-12-21 13:25:30,901 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1117 transitions. Word has length 74 [2021-12-21 13:25:30,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:30,902 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 1117 transitions. [2021-12-21 13:25:30,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 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 13:25:30,902 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1117 transitions. [2021-12-21 13:25:30,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-21 13:25:30,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:30,906 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] [2021-12-21 13:25:30,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 13:25:30,907 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:30,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:30,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1071682645, now seen corresponding path program 1 times [2021-12-21 13:25:30,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:30,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206713953] [2021-12-21 13:25:30,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:30,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:30,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:30,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:30,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 13:25:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 13:25:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,006 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 13:25:31,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:31,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206713953] [2021-12-21 13:25:31,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206713953] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:31,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:31,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:31,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393271247] [2021-12-21 13:25:31,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:31,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:31,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:31,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:31,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:31,009 INFO L87 Difference]: Start difference. First operand 782 states and 1117 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 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 13:25:31,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:31,097 INFO L93 Difference]: Finished difference Result 1442 states and 2096 transitions. [2021-12-21 13:25:31,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:25:31,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 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 82 [2021-12-21 13:25:31,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:31,102 INFO L225 Difference]: With dead ends: 1442 [2021-12-21 13:25:31,102 INFO L226 Difference]: Without dead ends: 802 [2021-12-21 13:25:31,104 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 13:25:31,105 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 6 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 846 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 13:25:31,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 846 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:31,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-12-21 13:25:31,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 802. [2021-12-21 13:25:31,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 632 states have (on average 1.4003164556962024) internal successors, (885), 635 states have internal predecessors, (885), 124 states have call successors, (124), 45 states have call predecessors, (124), 45 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-12-21 13:25:31,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 1133 transitions. [2021-12-21 13:25:31,155 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 1133 transitions. Word has length 82 [2021-12-21 13:25:31,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:31,156 INFO L470 AbstractCegarLoop]: Abstraction has 802 states and 1133 transitions. [2021-12-21 13:25:31,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 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 13:25:31,156 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 1133 transitions. [2021-12-21 13:25:31,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-21 13:25:31,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:31,158 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] [2021-12-21 13:25:31,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 13:25:31,158 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:31,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:31,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1920470825, now seen corresponding path program 1 times [2021-12-21 13:25:31,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:31,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233757148] [2021-12-21 13:25:31,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:31,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:31,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 13:25:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 13:25:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 13:25:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,237 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 13:25:31,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:31,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233757148] [2021-12-21 13:25:31,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233757148] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:31,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:31,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:31,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554108544] [2021-12-21 13:25:31,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:31,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:31,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:31,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:31,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:31,240 INFO L87 Difference]: Start difference. First operand 802 states and 1133 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 3 states have internal predecessors, (75), 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 13:25:31,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:31,321 INFO L93 Difference]: Finished difference Result 1482 states and 2128 transitions. [2021-12-21 13:25:31,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:25:31,321 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 3 states have internal predecessors, (75), 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 90 [2021-12-21 13:25:31,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:31,326 INFO L225 Difference]: With dead ends: 1482 [2021-12-21 13:25:31,326 INFO L226 Difference]: Without dead ends: 822 [2021-12-21 13:25:31,328 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 13:25:31,329 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 6 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 846 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 13:25:31,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 846 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:31,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-12-21 13:25:31,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 822. [2021-12-21 13:25:31,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 648 states have (on average 1.3904320987654322) internal successors, (901), 651 states have internal predecessors, (901), 124 states have call successors, (124), 49 states have call predecessors, (124), 49 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-12-21 13:25:31,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1149 transitions. [2021-12-21 13:25:31,390 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1149 transitions. Word has length 90 [2021-12-21 13:25:31,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:31,391 INFO L470 AbstractCegarLoop]: Abstraction has 822 states and 1149 transitions. [2021-12-21 13:25:31,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 3 states have internal predecessors, (75), 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 13:25:31,391 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1149 transitions. [2021-12-21 13:25:31,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-21 13:25:31,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:31,393 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] [2021-12-21 13:25:31,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 13:25:31,393 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:31,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:31,394 INFO L85 PathProgramCache]: Analyzing trace with hash -21962832, now seen corresponding path program 1 times [2021-12-21 13:25:31,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:31,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206696082] [2021-12-21 13:25:31,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:31,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 13:25:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 13:25:31,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 13:25:31,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,474 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 13:25:31,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:31,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206696082] [2021-12-21 13:25:31,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206696082] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:31,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:31,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:31,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120464495] [2021-12-21 13:25:31,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:31,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:31,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:31,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:31,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:31,477 INFO L87 Difference]: Start difference. First operand 822 states and 1149 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 3 states have internal predecessors, (75), 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 13:25:31,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:31,535 INFO L93 Difference]: Finished difference Result 1518 states and 2144 transitions. [2021-12-21 13:25:31,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:25:31,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 3 states have internal predecessors, (75), 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 90 [2021-12-21 13:25:31,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:31,540 INFO L225 Difference]: With dead ends: 1518 [2021-12-21 13:25:31,540 INFO L226 Difference]: Without dead ends: 838 [2021-12-21 13:25:31,542 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 13:25:31,543 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 5 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 855 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 13:25:31,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 855 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:31,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-12-21 13:25:31,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 838. [2021-12-21 13:25:31,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 660 states have (on average 1.3833333333333333) internal successors, (913), 663 states have internal predecessors, (913), 124 states have call successors, (124), 53 states have call predecessors, (124), 53 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-12-21 13:25:31,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1161 transitions. [2021-12-21 13:25:31,597 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1161 transitions. Word has length 90 [2021-12-21 13:25:31,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:31,597 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 1161 transitions. [2021-12-21 13:25:31,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 3 states have internal predecessors, (75), 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 13:25:31,597 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1161 transitions. [2021-12-21 13:25:31,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-21 13:25:31,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:31,599 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] [2021-12-21 13:25:31,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 13:25:31,600 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:31,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:31,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1155165143, now seen corresponding path program 1 times [2021-12-21 13:25:31,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:31,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159437639] [2021-12-21 13:25:31,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:31,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:31,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:31,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:31,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 13:25:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 13:25:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 13:25:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-21 13:25:31,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,688 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 13:25:31,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:31,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159437639] [2021-12-21 13:25:31,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159437639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:31,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:31,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:31,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460657827] [2021-12-21 13:25:31,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:31,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:31,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:31,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:31,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:31,691 INFO L87 Difference]: Start difference. First operand 838 states and 1161 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, (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 13:25:31,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:31,751 INFO L93 Difference]: Finished difference Result 1558 states and 2180 transitions. [2021-12-21 13:25:31,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:25:31,751 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, (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 98 [2021-12-21 13:25:31,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:31,755 INFO L225 Difference]: With dead ends: 1558 [2021-12-21 13:25:31,755 INFO L226 Difference]: Without dead ends: 862 [2021-12-21 13:25:31,757 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 13:25:31,758 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 7 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 857 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 13:25:31,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 857 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:31,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-12-21 13:25:31,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 862. [2021-12-21 13:25:31,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 680 states have (on average 1.3720588235294118) internal successors, (933), 683 states have internal predecessors, (933), 124 states have call successors, (124), 57 states have call predecessors, (124), 57 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-12-21 13:25:31,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1181 transitions. [2021-12-21 13:25:31,800 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1181 transitions. Word has length 98 [2021-12-21 13:25:31,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:31,801 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 1181 transitions. [2021-12-21 13:25:31,801 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, (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 13:25:31,801 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1181 transitions. [2021-12-21 13:25:31,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-21 13:25:31,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:31,803 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] [2021-12-21 13:25:31,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 13:25:31,804 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:31,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:31,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1039496388, now seen corresponding path program 1 times [2021-12-21 13:25:31,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:31,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559188422] [2021-12-21 13:25:31,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:31,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:31,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 13:25:31,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 13:25:31,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 13:25:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-21 13:25:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-21 13:25:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:31,967 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 13:25:31,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:31,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559188422] [2021-12-21 13:25:31,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559188422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:31,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:31,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:25:31,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934308339] [2021-12-21 13:25:31,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:31,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:25:31,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:31,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:25:31,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:25:31,970 INFO L87 Difference]: Start difference. First operand 862 states and 1181 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 6 states have internal predecessors, (80), 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 13:25:32,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:32,253 INFO L93 Difference]: Finished difference Result 2467 states and 3431 transitions. [2021-12-21 13:25:32,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 13:25:32,254 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 6 states have internal predecessors, (80), 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 101 [2021-12-21 13:25:32,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:32,262 INFO L225 Difference]: With dead ends: 2467 [2021-12-21 13:25:32,262 INFO L226 Difference]: Without dead ends: 1747 [2021-12-21 13:25:32,264 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 13:25:32,265 INFO L933 BasicCegarLoop]: 411 mSDtfsCounter, 391 mSDsluCounter, 1849 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 2260 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:32,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 2260 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:25:32,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-12-21 13:25:32,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1146. [2021-12-21 13:25:32,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 891 states have (on average 1.3636363636363635) internal successors, (1215), 896 states have internal predecessors, (1215), 172 states have call successors, (172), 82 states have call predecessors, (172), 82 states have return successors, (172), 167 states have call predecessors, (172), 172 states have call successors, (172) [2021-12-21 13:25:32,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 1559 transitions. [2021-12-21 13:25:32,347 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 1559 transitions. Word has length 101 [2021-12-21 13:25:32,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:32,348 INFO L470 AbstractCegarLoop]: Abstraction has 1146 states and 1559 transitions. [2021-12-21 13:25:32,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 6 states have internal predecessors, (80), 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 13:25:32,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 1559 transitions. [2021-12-21 13:25:32,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-21 13:25:32,349 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:32,350 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] [2021-12-21 13:25:32,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 13:25:32,350 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:32,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:32,351 INFO L85 PathProgramCache]: Analyzing trace with hash -410105680, now seen corresponding path program 1 times [2021-12-21 13:25:32,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:32,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11932355] [2021-12-21 13:25:32,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:32,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:32,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:32,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:32,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:32,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 13:25:32,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:32,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 13:25:32,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:32,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 13:25:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:32,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-21 13:25:32,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:32,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-21 13:25:32,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:32,449 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 13:25:32,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:32,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11932355] [2021-12-21 13:25:32,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11932355] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:32,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:32,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 13:25:32,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199679258] [2021-12-21 13:25:32,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:32,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 13:25:32,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:32,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 13:25:32,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:25:32,451 INFO L87 Difference]: Start difference. First operand 1146 states and 1559 transitions. Second operand has 6 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 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 13:25:32,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:32,614 INFO L93 Difference]: Finished difference Result 1611 states and 2289 transitions. [2021-12-21 13:25:32,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 13:25:32,615 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 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 104 [2021-12-21 13:25:32,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:32,621 INFO L225 Difference]: With dead ends: 1611 [2021-12-21 13:25:32,622 INFO L226 Difference]: Without dead ends: 1609 [2021-12-21 13:25:32,622 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 13:25:32,623 INFO L933 BasicCegarLoop]: 509 mSDtfsCounter, 255 mSDsluCounter, 1722 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 2231 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:32,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 2231 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:32,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2021-12-21 13:25:32,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1154. [2021-12-21 13:25:32,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 895 states have (on average 1.3620111731843576) internal successors, (1219), 902 states have internal predecessors, (1219), 174 states have call successors, (174), 84 states have call predecessors, (174), 84 states have return successors, (174), 167 states have call predecessors, (174), 174 states have call successors, (174) [2021-12-21 13:25:32,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1567 transitions. [2021-12-21 13:25:32,709 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1567 transitions. Word has length 104 [2021-12-21 13:25:32,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:32,709 INFO L470 AbstractCegarLoop]: Abstraction has 1154 states and 1567 transitions. [2021-12-21 13:25:32,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 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 13:25:32,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1567 transitions. [2021-12-21 13:25:32,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-21 13:25:32,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:32,711 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] [2021-12-21 13:25:32,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 13:25:32,712 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:32,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:32,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1945149666, now seen corresponding path program 1 times [2021-12-21 13:25:32,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:32,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174864703] [2021-12-21 13:25:32,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:32,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:32,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:32,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:32,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:32,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 13:25:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:32,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 13:25:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:32,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 13:25:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:32,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-21 13:25:32,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:32,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-21 13:25:32,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:32,787 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 13:25:32,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:32,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174864703] [2021-12-21 13:25:32,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174864703] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:32,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:32,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:32,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997596438] [2021-12-21 13:25:32,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:32,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:32,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:32,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:32,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:32,789 INFO L87 Difference]: Start difference. First operand 1154 states and 1567 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 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 13:25:32,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:32,868 INFO L93 Difference]: Finished difference Result 2122 states and 2904 transitions. [2021-12-21 13:25:32,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:25:32,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 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 105 [2021-12-21 13:25:32,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:32,873 INFO L225 Difference]: With dead ends: 2122 [2021-12-21 13:25:32,873 INFO L226 Difference]: Without dead ends: 1178 [2021-12-21 13:25:32,875 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 13:25:32,876 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 5 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 855 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 13:25:32,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 855 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:32,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2021-12-21 13:25:32,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1178. [2021-12-21 13:25:32,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 913 states have (on average 1.3548740416210296) internal successors, (1237), 920 states have internal predecessors, (1237), 174 states have call successors, (174), 90 states have call predecessors, (174), 90 states have return successors, (174), 167 states have call predecessors, (174), 174 states have call successors, (174) [2021-12-21 13:25:32,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1585 transitions. [2021-12-21 13:25:32,939 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1585 transitions. Word has length 105 [2021-12-21 13:25:32,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:32,940 INFO L470 AbstractCegarLoop]: Abstraction has 1178 states and 1585 transitions. [2021-12-21 13:25:32,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 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 13:25:32,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1585 transitions. [2021-12-21 13:25:32,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-21 13:25:32,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:32,942 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] [2021-12-21 13:25:32,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 13:25:32,942 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:32,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:32,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1810984556, now seen corresponding path program 1 times [2021-12-21 13:25:32,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:32,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100221732] [2021-12-21 13:25:32,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:32,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:32,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:33,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:33,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:33,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 13:25:33,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:33,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 13:25:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:33,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 13:25:33,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:33,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-21 13:25:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:33,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-21 13:25:33,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:33,024 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 13:25:33,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:33,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100221732] [2021-12-21 13:25:33,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100221732] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:33,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:33,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:25:33,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559837580] [2021-12-21 13:25:33,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:33,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:25:33,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:33,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:25:33,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:25:33,026 INFO L87 Difference]: Start difference. First operand 1178 states and 1585 transitions. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 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 13:25:33,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:33,241 INFO L93 Difference]: Finished difference Result 2408 states and 3282 transitions. [2021-12-21 13:25:33,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 13:25:33,242 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 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 107 [2021-12-21 13:25:33,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:33,248 INFO L225 Difference]: With dead ends: 2408 [2021-12-21 13:25:33,248 INFO L226 Difference]: Without dead ends: 1522 [2021-12-21 13:25:33,250 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 13:25:33,251 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 513 mSDsluCounter, 1827 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 2231 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:33,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 2231 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:25:33,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2021-12-21 13:25:33,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1224. [2021-12-21 13:25:33,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 970 states have (on average 1.3443298969072166) internal successors, (1304), 982 states have internal predecessors, (1304), 162 states have call successors, (162), 91 states have call predecessors, (162), 91 states have return successors, (162), 150 states have call predecessors, (162), 162 states have call successors, (162) [2021-12-21 13:25:33,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1628 transitions. [2021-12-21 13:25:33,329 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1628 transitions. Word has length 107 [2021-12-21 13:25:33,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:33,329 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 1628 transitions. [2021-12-21 13:25:33,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 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 13:25:33,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1628 transitions. [2021-12-21 13:25:33,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-21 13:25:33,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:33,331 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] [2021-12-21 13:25:33,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 13:25:33,332 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:33,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:33,332 INFO L85 PathProgramCache]: Analyzing trace with hash 687723298, now seen corresponding path program 1 times [2021-12-21 13:25:33,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:33,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688718807] [2021-12-21 13:25:33,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:33,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:33,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:33,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:33,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:33,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 13:25:33,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:33,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 13:25:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:33,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 13:25:33,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:33,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-21 13:25:33,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:33,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-21 13:25:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:33,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-21 13:25:33,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:33,471 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 13:25:33,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:33,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688718807] [2021-12-21 13:25:33,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688718807] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:33,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:33,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:25:33,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847953700] [2021-12-21 13:25:33,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:33,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:25:33,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:33,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:25:33,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:25:33,474 INFO L87 Difference]: Start difference. First operand 1224 states and 1628 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, (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 13:25:33,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:33,708 INFO L93 Difference]: Finished difference Result 2518 states and 3425 transitions. [2021-12-21 13:25:33,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 13:25:33,709 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, (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 109 [2021-12-21 13:25:33,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:33,716 INFO L225 Difference]: With dead ends: 2518 [2021-12-21 13:25:33,716 INFO L226 Difference]: Without dead ends: 1566 [2021-12-21 13:25:33,718 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 13:25:33,719 INFO L933 BasicCegarLoop]: 434 mSDtfsCounter, 395 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 2381 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:33,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 2381 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:25:33,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2021-12-21 13:25:33,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1110. [2021-12-21 13:25:33,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 883 states have (on average 1.345413363533409) internal successors, (1188), 893 states have internal predecessors, (1188), 145 states have call successors, (145), 81 states have call predecessors, (145), 81 states have return successors, (145), 135 states have call predecessors, (145), 145 states have call successors, (145) [2021-12-21 13:25:33,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 1478 transitions. [2021-12-21 13:25:33,827 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 1478 transitions. Word has length 109 [2021-12-21 13:25:33,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:33,828 INFO L470 AbstractCegarLoop]: Abstraction has 1110 states and 1478 transitions. [2021-12-21 13:25:33,828 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, (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 13:25:33,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 1478 transitions. [2021-12-21 13:25:33,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-21 13:25:33,829 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:33,830 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] [2021-12-21 13:25:33,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 13:25:33,830 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:33,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:33,831 INFO L85 PathProgramCache]: Analyzing trace with hash 943897966, now seen corresponding path program 1 times [2021-12-21 13:25:33,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:33,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031043467] [2021-12-21 13:25:33,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:33,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:33,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:33,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:33,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:33,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 13:25:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:33,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 13:25:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:33,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 13:25:33,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:33,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-21 13:25:33,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:33,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-21 13:25:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:33,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 13:25:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:33,958 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 13:25:33,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:33,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031043467] [2021-12-21 13:25:33,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031043467] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:33,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:33,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:25:33,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825371075] [2021-12-21 13:25:33,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:33,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:25:33,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:33,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:25:33,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:25:33,961 INFO L87 Difference]: Start difference. First operand 1110 states and 1478 transitions. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 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 13:25:34,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:34,578 INFO L93 Difference]: Finished difference Result 2589 states and 3532 transitions. [2021-12-21 13:25:34,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 13:25:34,579 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 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 110 [2021-12-21 13:25:34,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:34,585 INFO L225 Difference]: With dead ends: 2589 [2021-12-21 13:25:34,585 INFO L226 Difference]: Without dead ends: 1671 [2021-12-21 13:25:34,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:25:34,588 INFO L933 BasicCegarLoop]: 501 mSDtfsCounter, 1030 mSDsluCounter, 1628 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 2129 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:34,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1036 Valid, 2129 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 13:25:34,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2021-12-21 13:25:34,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1126. [2021-12-21 13:25:34,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 891 states have (on average 1.3254769921436589) internal successors, (1181), 902 states have internal predecessors, (1181), 148 states have call successors, (148), 86 states have call predecessors, (148), 86 states have return successors, (148), 137 states have call predecessors, (148), 148 states have call successors, (148) [2021-12-21 13:25:34,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1477 transitions. [2021-12-21 13:25:34,691 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1477 transitions. Word has length 110 [2021-12-21 13:25:34,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:34,691 INFO L470 AbstractCegarLoop]: Abstraction has 1126 states and 1477 transitions. [2021-12-21 13:25:34,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 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 13:25:34,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1477 transitions. [2021-12-21 13:25:34,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-21 13:25:34,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:34,693 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] [2021-12-21 13:25:34,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 13:25:34,693 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:34,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:34,694 INFO L85 PathProgramCache]: Analyzing trace with hash 272075901, now seen corresponding path program 1 times [2021-12-21 13:25:34,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:34,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26158407] [2021-12-21 13:25:34,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:34,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:34,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:34,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:25:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:34,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 13:25:34,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:34,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 13:25:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:34,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 13:25:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:34,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-21 13:25:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:34,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-21 13:25:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:34,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 13:25:34,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:34,758 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 13:25:34,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:34,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26158407] [2021-12-21 13:25:34,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26158407] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:34,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:34,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:34,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467693626] [2021-12-21 13:25:34,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:34,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:34,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:34,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:34,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:34,761 INFO L87 Difference]: Start difference. First operand 1126 states and 1477 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 13:25:35,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:35,069 INFO L93 Difference]: Finished difference Result 3155 states and 4223 transitions. [2021-12-21 13:25:35,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:25:35,070 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 110 [2021-12-21 13:25:35,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:35,079 INFO L225 Difference]: With dead ends: 3155 [2021-12-21 13:25:35,079 INFO L226 Difference]: Without dead ends: 2272 [2021-12-21 13:25:35,081 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 13:25:35,082 INFO L933 BasicCegarLoop]: 503 mSDtfsCounter, 434 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:35,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 1211 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:25:35,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2021-12-21 13:25:35,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 1915. [2021-12-21 13:25:35,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1490 states have (on average 1.323489932885906) internal successors, (1972), 1509 states have internal predecessors, (1972), 272 states have call successors, (272), 152 states have call predecessors, (272), 152 states have return successors, (272), 253 states have call predecessors, (272), 272 states have call successors, (272) [2021-12-21 13:25:35,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 2516 transitions. [2021-12-21 13:25:35,251 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 2516 transitions. Word has length 110 [2021-12-21 13:25:35,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:35,251 INFO L470 AbstractCegarLoop]: Abstraction has 1915 states and 2516 transitions. [2021-12-21 13:25:35,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 13:25:35,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 2516 transitions. [2021-12-21 13:25:35,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-21 13:25:35,253 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:35,253 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 13:25:35,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 13:25:35,254 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:35,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:35,254 INFO L85 PathProgramCache]: Analyzing trace with hash 173907826, now seen corresponding path program 1 times [2021-12-21 13:25:35,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:35,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101675364] [2021-12-21 13:25:35,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:35,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:35,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:35,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:25:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:35,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 13:25:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:35,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 13:25:35,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:35,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 13:25:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:35,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-21 13:25:35,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:35,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-21 13:25:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:35,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 13:25:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:35,418 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 13:25:35,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:35,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101675364] [2021-12-21 13:25:35,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101675364] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:35,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:35,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:25:35,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862198993] [2021-12-21 13:25:35,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:35,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:25:35,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:35,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:25:35,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:25:35,421 INFO L87 Difference]: Start difference. First operand 1915 states and 2516 transitions. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 6 states have internal predecessors, (89), 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 13:25:36,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:36,108 INFO L93 Difference]: Finished difference Result 4352 states and 5848 transitions. [2021-12-21 13:25:36,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 13:25:36,109 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 6 states have internal predecessors, (89), 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 112 [2021-12-21 13:25:36,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:36,119 INFO L225 Difference]: With dead ends: 4352 [2021-12-21 13:25:36,120 INFO L226 Difference]: Without dead ends: 2774 [2021-12-21 13:25:36,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:25:36,124 INFO L933 BasicCegarLoop]: 570 mSDtfsCounter, 788 mSDsluCounter, 1912 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 2482 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:36,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 2482 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 13:25:36,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2774 states. [2021-12-21 13:25:36,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2774 to 1936. [2021-12-21 13:25:36,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1936 states, 1498 states have (on average 1.3190921228304406) internal successors, (1976), 1518 states have internal predecessors, (1976), 280 states have call successors, (280), 157 states have call predecessors, (280), 157 states have return successors, (280), 260 states have call predecessors, (280), 280 states have call successors, (280) [2021-12-21 13:25:36,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 2536 transitions. [2021-12-21 13:25:36,333 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 2536 transitions. Word has length 112 [2021-12-21 13:25:36,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:36,333 INFO L470 AbstractCegarLoop]: Abstraction has 1936 states and 2536 transitions. [2021-12-21 13:25:36,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 6 states have internal predecessors, (89), 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 13:25:36,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 2536 transitions. [2021-12-21 13:25:36,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-21 13:25:36,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:36,335 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] [2021-12-21 13:25:36,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 13:25:36,336 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:36,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:36,336 INFO L85 PathProgramCache]: Analyzing trace with hash 540191593, now seen corresponding path program 1 times [2021-12-21 13:25:36,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:36,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406505536] [2021-12-21 13:25:36,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:36,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:36,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:36,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:36,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:36,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-21 13:25:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:36,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 13:25:36,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:36,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 13:25:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:36,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-21 13:25:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:36,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-21 13:25:36,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:36,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-21 13:25:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:36,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-21 13:25:36,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:36,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 13:25:36,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:36,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406505536] [2021-12-21 13:25:36,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406505536] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:36,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:36,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:36,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812261535] [2021-12-21 13:25:36,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:36,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:36,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:36,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:36,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:36,398 INFO L87 Difference]: Start difference. First operand 1936 states and 2536 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 13:25:36,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:36,775 INFO L93 Difference]: Finished difference Result 5122 states and 6787 transitions. [2021-12-21 13:25:36,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:25:36,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 113 [2021-12-21 13:25:36,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:36,789 INFO L225 Difference]: With dead ends: 5122 [2021-12-21 13:25:36,789 INFO L226 Difference]: Without dead ends: 3560 [2021-12-21 13:25:36,794 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 13:25:36,794 INFO L933 BasicCegarLoop]: 519 mSDtfsCounter, 481 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:36,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 1275 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:25:36,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3560 states. [2021-12-21 13:25:37,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3560 to 2987. [2021-12-21 13:25:37,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2987 states, 2274 states have (on average 1.3153034300791557) internal successors, (2991), 2305 states have internal predecessors, (2991), 460 states have call successors, (460), 252 states have call predecessors, (460), 252 states have return successors, (460), 429 states have call predecessors, (460), 460 states have call successors, (460) [2021-12-21 13:25:37,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2987 states to 2987 states and 3911 transitions. [2021-12-21 13:25:37,065 INFO L78 Accepts]: Start accepts. Automaton has 2987 states and 3911 transitions. Word has length 113 [2021-12-21 13:25:37,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:37,066 INFO L470 AbstractCegarLoop]: Abstraction has 2987 states and 3911 transitions. [2021-12-21 13:25:37,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 13:25:37,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2987 states and 3911 transitions. [2021-12-21 13:25:37,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-21 13:25:37,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:37,068 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] [2021-12-21 13:25:37,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 13:25:37,069 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:37,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:37,069 INFO L85 PathProgramCache]: Analyzing trace with hash -290051495, now seen corresponding path program 1 times [2021-12-21 13:25:37,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:37,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302894444] [2021-12-21 13:25:37,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:37,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:37,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:37,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 13:25:37,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:37,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 13:25:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:37,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 13:25:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:37,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 13:25:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:37,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 13:25:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:37,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 13:25:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:37,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-21 13:25:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:37,127 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 13:25:37,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:37,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302894444] [2021-12-21 13:25:37,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302894444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:37,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:37,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:37,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520465211] [2021-12-21 13:25:37,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:37,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:37,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:37,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:37,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:37,129 INFO L87 Difference]: Start difference. First operand 2987 states and 3911 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 13:25:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:37,598 INFO L93 Difference]: Finished difference Result 7078 states and 9333 transitions. [2021-12-21 13:25:37,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:25:37,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 113 [2021-12-21 13:25:37,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:37,622 INFO L225 Difference]: With dead ends: 7078 [2021-12-21 13:25:37,627 INFO L226 Difference]: Without dead ends: 4591 [2021-12-21 13:25:37,634 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 13:25:37,635 INFO L933 BasicCegarLoop]: 543 mSDtfsCounter, 428 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 1272 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:37,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 1272 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:25:37,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4591 states. [2021-12-21 13:25:37,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4591 to 4255. [2021-12-21 13:25:37,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4255 states, 3218 states have (on average 1.3132380360472342) internal successors, (4226), 3262 states have internal predecessors, (4226), 672 states have call successors, (672), 364 states have call predecessors, (672), 364 states have return successors, (672), 628 states have call predecessors, (672), 672 states have call successors, (672) [2021-12-21 13:25:38,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4255 states to 4255 states and 5570 transitions. [2021-12-21 13:25:38,013 INFO L78 Accepts]: Start accepts. Automaton has 4255 states and 5570 transitions. Word has length 113 [2021-12-21 13:25:38,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:38,014 INFO L470 AbstractCegarLoop]: Abstraction has 4255 states and 5570 transitions. [2021-12-21 13:25:38,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 13:25:38,015 INFO L276 IsEmpty]: Start isEmpty. Operand 4255 states and 5570 transitions. [2021-12-21 13:25:38,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-21 13:25:38,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:38,017 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 13:25:38,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 13:25:38,018 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:38,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:38,018 INFO L85 PathProgramCache]: Analyzing trace with hash 725293879, now seen corresponding path program 1 times [2021-12-21 13:25:38,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:38,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117500846] [2021-12-21 13:25:38,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:38,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:38,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:38,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 13:25:38,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:38,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-21 13:25:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:38,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-21 13:25:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:38,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 13:25:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:38,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 13:25:38,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:38,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-21 13:25:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:38,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-21 13:25:38,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:38,072 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 13:25:38,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:38,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117500846] [2021-12-21 13:25:38,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117500846] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:38,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:38,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:25:38,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822817407] [2021-12-21 13:25:38,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:38,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:25:38,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:38,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:25:38,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:25:38,075 INFO L87 Difference]: Start difference. First operand 4255 states and 5570 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 13:25:38,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:38,722 INFO L93 Difference]: Finished difference Result 9626 states and 13040 transitions. [2021-12-21 13:25:38,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:25:38,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 114 [2021-12-21 13:25:38,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:38,743 INFO L225 Difference]: With dead ends: 9626 [2021-12-21 13:25:38,743 INFO L226 Difference]: Without dead ends: 5764 [2021-12-21 13:25:38,753 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 13:25:38,753 INFO L933 BasicCegarLoop]: 452 mSDtfsCounter, 148 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 697 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 13:25:38,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 697 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:25:38,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5764 states. [2021-12-21 13:25:39,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5764 to 4261. [2021-12-21 13:25:39,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4261 states, 3224 states have (on average 1.3126550868486353) internal successors, (4232), 3268 states have internal predecessors, (4232), 672 states have call successors, (672), 364 states have call predecessors, (672), 364 states have return successors, (672), 628 states have call predecessors, (672), 672 states have call successors, (672) [2021-12-21 13:25:39,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4261 states to 4261 states and 5576 transitions. [2021-12-21 13:25:39,149 INFO L78 Accepts]: Start accepts. Automaton has 4261 states and 5576 transitions. Word has length 114 [2021-12-21 13:25:39,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:39,150 INFO L470 AbstractCegarLoop]: Abstraction has 4261 states and 5576 transitions. [2021-12-21 13:25:39,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 13:25:39,150 INFO L276 IsEmpty]: Start isEmpty. Operand 4261 states and 5576 transitions. [2021-12-21 13:25:39,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-21 13:25:39,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:39,152 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 13:25:39,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 13:25:39,153 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:39,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:39,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1766585516, now seen corresponding path program 1 times [2021-12-21 13:25:39,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:39,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247992839] [2021-12-21 13:25:39,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:39,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:39,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:39,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 13:25:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:39,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 13:25:39,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:39,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 13:25:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:39,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 13:25:39,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:39,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 13:25:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:39,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 13:25:39,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:39,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-21 13:25:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:39,224 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 13:25:39,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:39,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247992839] [2021-12-21 13:25:39,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247992839] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:39,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:39,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:39,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490926979] [2021-12-21 13:25:39,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:39,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:39,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:39,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:39,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:39,227 INFO L87 Difference]: Start difference. First operand 4261 states and 5576 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 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 13:25:39,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:39,690 INFO L93 Difference]: Finished difference Result 8938 states and 11948 transitions. [2021-12-21 13:25:39,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:25:39,691 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), 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 13:25:39,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:39,704 INFO L225 Difference]: With dead ends: 8938 [2021-12-21 13:25:39,705 INFO L226 Difference]: Without dead ends: 4770 [2021-12-21 13:25:39,712 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 13:25:39,714 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 356 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:39,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 871 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:39,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4770 states. [2021-12-21 13:25:39,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4770 to 3836. [2021-12-21 13:25:39,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3836 states, 2882 states have (on average 1.3178348369188064) internal successors, (3798), 2916 states have internal predecessors, (3798), 620 states have call successors, (620), 333 states have call predecessors, (620), 333 states have return successors, (620), 586 states have call predecessors, (620), 620 states have call successors, (620) [2021-12-21 13:25:40,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3836 states to 3836 states and 5038 transitions. [2021-12-21 13:25:40,041 INFO L78 Accepts]: Start accepts. Automaton has 3836 states and 5038 transitions. Word has length 115 [2021-12-21 13:25:40,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:40,041 INFO L470 AbstractCegarLoop]: Abstraction has 3836 states and 5038 transitions. [2021-12-21 13:25:40,041 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), 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 13:25:40,042 INFO L276 IsEmpty]: Start isEmpty. Operand 3836 states and 5038 transitions. [2021-12-21 13:25:40,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-21 13:25:40,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:40,043 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 13:25:40,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-21 13:25:40,044 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:40,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:40,044 INFO L85 PathProgramCache]: Analyzing trace with hash -723784830, now seen corresponding path program 1 times [2021-12-21 13:25:40,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:40,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796788067] [2021-12-21 13:25:40,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:40,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:40,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:40,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:40,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 13:25:40,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:40,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-21 13:25:40,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:40,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-21 13:25:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:40,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 13:25:40,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:40,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 13:25:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:40,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-21 13:25:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:40,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-21 13:25:40,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:40,094 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 13:25:40,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:40,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796788067] [2021-12-21 13:25:40,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796788067] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:40,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:40,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:25:40,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746307563] [2021-12-21 13:25:40,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:40,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:25:40,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:40,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:25:40,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:25:40,097 INFO L87 Difference]: Start difference. First operand 3836 states and 5038 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 13:25:40,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:40,618 INFO L93 Difference]: Finished difference Result 8444 states and 11382 transitions. [2021-12-21 13:25:40,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:25:40,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 116 [2021-12-21 13:25:40,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:40,633 INFO L225 Difference]: With dead ends: 8444 [2021-12-21 13:25:40,633 INFO L226 Difference]: Without dead ends: 4815 [2021-12-21 13:25:40,642 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 13:25:40,642 INFO L933 BasicCegarLoop]: 432 mSDtfsCounter, 148 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 674 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 13:25:40,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 674 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:25:40,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4815 states. [2021-12-21 13:25:41,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4815 to 3846. [2021-12-21 13:25:41,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3846 states, 2892 states have (on average 1.3167358229598893) internal successors, (3808), 2926 states have internal predecessors, (3808), 620 states have call successors, (620), 333 states have call predecessors, (620), 333 states have return successors, (620), 586 states have call predecessors, (620), 620 states have call successors, (620) [2021-12-21 13:25:41,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3846 states to 3846 states and 5048 transitions. [2021-12-21 13:25:41,024 INFO L78 Accepts]: Start accepts. Automaton has 3846 states and 5048 transitions. Word has length 116 [2021-12-21 13:25:41,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:41,024 INFO L470 AbstractCegarLoop]: Abstraction has 3846 states and 5048 transitions. [2021-12-21 13:25:41,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 13:25:41,024 INFO L276 IsEmpty]: Start isEmpty. Operand 3846 states and 5048 transitions. [2021-12-21 13:25:41,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-21 13:25:41,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:41,026 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 13:25:41,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-21 13:25:41,027 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:41,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:41,027 INFO L85 PathProgramCache]: Analyzing trace with hash -440834179, now seen corresponding path program 1 times [2021-12-21 13:25:41,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:41,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121298857] [2021-12-21 13:25:41,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:41,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:41,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 13:25:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-21 13:25:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-21 13:25:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 13:25:41,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 13:25:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-21 13:25:41,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-21 13:25:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,095 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 13:25:41,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:41,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121298857] [2021-12-21 13:25:41,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121298857] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:41,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:41,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:41,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322009219] [2021-12-21 13:25:41,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:41,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:41,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:41,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:41,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:41,098 INFO L87 Difference]: Start difference. First operand 3846 states and 5048 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 13:25:41,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:41,494 INFO L93 Difference]: Finished difference Result 8395 states and 11302 transitions. [2021-12-21 13:25:41,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:25:41,495 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 13:25:41,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:41,508 INFO L225 Difference]: With dead ends: 8395 [2021-12-21 13:25:41,509 INFO L226 Difference]: Without dead ends: 4691 [2021-12-21 13:25:41,516 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 13:25:41,517 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 271 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:41,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 902 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:41,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2021-12-21 13:25:41,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 2895. [2021-12-21 13:25:41,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2895 states, 2175 states have (on average 1.3066666666666666) internal successors, (2842), 2194 states have internal predecessors, (2842), 469 states have call successors, (469), 250 states have call predecessors, (469), 250 states have return successors, (469), 450 states have call predecessors, (469), 469 states have call successors, (469) [2021-12-21 13:25:41,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2895 states to 2895 states and 3780 transitions. [2021-12-21 13:25:41,823 INFO L78 Accepts]: Start accepts. Automaton has 2895 states and 3780 transitions. Word has length 116 [2021-12-21 13:25:41,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:41,823 INFO L470 AbstractCegarLoop]: Abstraction has 2895 states and 3780 transitions. [2021-12-21 13:25:41,823 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 13:25:41,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2895 states and 3780 transitions. [2021-12-21 13:25:41,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-21 13:25:41,828 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:41,828 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] [2021-12-21 13:25:41,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-21 13:25:41,828 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:41,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:41,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1943845531, now seen corresponding path program 1 times [2021-12-21 13:25:41,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:41,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883114933] [2021-12-21 13:25:41,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:41,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:41,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:41,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 13:25:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 13:25:41,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 13:25:41,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-21 13:25:41,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-21 13:25:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-21 13:25:41,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-21 13:25:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-21 13:25:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-21 13:25:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-21 13:25:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 13:25:41,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2021-12-21 13:25:41,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:41,984 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 16 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-21 13:25:41,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:41,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883114933] [2021-12-21 13:25:41,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883114933] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:25:41,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522222201] [2021-12-21 13:25:41,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:41,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:25:41,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:25:41,987 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 13:25:42,025 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 13:25:42,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:42,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 13:25:42,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:25:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 77 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-21 13:25:42,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:25:43,086 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-21 13:25:43,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522222201] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:25:43,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:25:43,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2021-12-21 13:25:43,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535370744] [2021-12-21 13:25:43,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:25:43,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 13:25:43,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:43,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 13:25:43,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-21 13:25:43,089 INFO L87 Difference]: Start difference. First operand 2895 states and 3780 transitions. Second operand has 14 states, 14 states have (on average 18.571428571428573) internal successors, (260), 13 states have internal predecessors, (260), 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 13:25:46,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:46,700 INFO L93 Difference]: Finished difference Result 9922 states and 13848 transitions. [2021-12-21 13:25:46,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-21 13:25:46,701 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 18.571428571428573) internal successors, (260), 13 states have internal predecessors, (260), 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 184 [2021-12-21 13:25:46,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:46,724 INFO L225 Difference]: With dead ends: 9922 [2021-12-21 13:25:46,725 INFO L226 Difference]: Without dead ends: 7306 [2021-12-21 13:25:46,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 400 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=749, Invalid=3411, Unknown=0, NotChecked=0, Total=4160 [2021-12-21 13:25:46,734 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 4409 mSDsluCounter, 2924 mSDsCounter, 0 mSdLazyCounter, 2010 mSolverCounterSat, 1308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4409 SdHoareTripleChecker+Valid, 3258 SdHoareTripleChecker+Invalid, 3318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1308 IncrementalHoareTripleChecker+Valid, 2010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:46,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4409 Valid, 3258 Invalid, 3318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1308 Valid, 2010 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-21 13:25:46,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2021-12-21 13:25:47,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 3419. [2021-12-21 13:25:47,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3419 states, 2592 states have (on average 1.3036265432098766) internal successors, (3379), 2612 states have internal predecessors, (3379), 531 states have call successors, (531), 295 states have call predecessors, (531), 295 states have return successors, (531), 511 states have call predecessors, (531), 531 states have call successors, (531) [2021-12-21 13:25:47,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3419 states to 3419 states and 4441 transitions. [2021-12-21 13:25:47,351 INFO L78 Accepts]: Start accepts. Automaton has 3419 states and 4441 transitions. Word has length 184 [2021-12-21 13:25:47,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:47,352 INFO L470 AbstractCegarLoop]: Abstraction has 3419 states and 4441 transitions. [2021-12-21 13:25:47,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.571428571428573) internal successors, (260), 13 states have internal predecessors, (260), 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 13:25:47,352 INFO L276 IsEmpty]: Start isEmpty. Operand 3419 states and 4441 transitions. [2021-12-21 13:25:47,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-12-21 13:25:47,358 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:47,358 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:25:47,386 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 13:25:47,571 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,SelfDestructingSolverStorable26 [2021-12-21 13:25:47,572 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:47,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:47,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1757506182, now seen corresponding path program 1 times [2021-12-21 13:25:47,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:47,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704944562] [2021-12-21 13:25:47,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:47,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:47,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:47,719 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 47 [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 60 [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 65 [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 73 [2021-12-21 13:25:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-21 13:25:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-21 13:25:47,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-21 13:25:47,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-21 13:25:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-21 13:25:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-21 13:25:47,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-21 13:25:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 13:25:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2021-12-21 13:25:47,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-12-21 13:25:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-21 13:25:47,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:47,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704944562] [2021-12-21 13:25:47,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704944562] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:25:47,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039181266] [2021-12-21 13:25:47,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:47,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:25:47,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:25:47,779 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 13:25:47,780 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 13:25:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 13:25:48,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:25:48,451 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 53 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 13:25:48,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:25:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-21 13:25:48,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039181266] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:25:48,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:25:48,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2021-12-21 13:25:48,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902849736] [2021-12-21 13:25:48,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:25:48,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 13:25:48,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:48,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 13:25:48,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-12-21 13:25:48,896 INFO L87 Difference]: Start difference. First operand 3419 states and 4441 transitions. Second operand has 16 states, 16 states have (on average 16.375) internal successors, (262), 14 states have internal predecessors, (262), 6 states have call successors, (43), 4 states have call predecessors, (43), 7 states have return successors, (42), 8 states have call predecessors, (42), 6 states have call successors, (42) [2021-12-21 13:25:56,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:56,813 INFO L93 Difference]: Finished difference Result 17212 states and 23325 transitions. [2021-12-21 13:25:56,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-12-21 13:25:56,813 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 16.375) internal successors, (262), 14 states have internal predecessors, (262), 6 states have call successors, (43), 4 states have call predecessors, (43), 7 states have return successors, (42), 8 states have call predecessors, (42), 6 states have call successors, (42) Word has length 192 [2021-12-21 13:25:56,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:56,856 INFO L225 Difference]: With dead ends: 17212 [2021-12-21 13:25:56,856 INFO L226 Difference]: Without dead ends: 14081 [2021-12-21 13:25:56,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 472 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5045 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1835, Invalid=12207, Unknown=0, NotChecked=0, Total=14042 [2021-12-21 13:25:56,870 INFO L933 BasicCegarLoop]: 1788 mSDtfsCounter, 5757 mSDsluCounter, 13477 mSDsCounter, 0 mSdLazyCounter, 5456 mSolverCounterSat, 3537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5757 SdHoareTripleChecker+Valid, 15265 SdHoareTripleChecker+Invalid, 8993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3537 IncrementalHoareTripleChecker+Valid, 5456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:56,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5757 Valid, 15265 Invalid, 8993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3537 Valid, 5456 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-12-21 13:25:56,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14081 states. [2021-12-21 13:25:57,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14081 to 6242. [2021-12-21 13:25:57,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6242 states, 4698 states have (on average 1.3018305661983822) internal successors, (6116), 4736 states have internal predecessors, (6116), 992 states have call successors, (992), 551 states have call predecessors, (992), 551 states have return successors, (992), 954 states have call predecessors, (992), 992 states have call successors, (992) [2021-12-21 13:25:57,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6242 states to 6242 states and 8100 transitions. [2021-12-21 13:25:57,750 INFO L78 Accepts]: Start accepts. Automaton has 6242 states and 8100 transitions. Word has length 192 [2021-12-21 13:25:57,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:57,751 INFO L470 AbstractCegarLoop]: Abstraction has 6242 states and 8100 transitions. [2021-12-21 13:25:57,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 16.375) internal successors, (262), 14 states have internal predecessors, (262), 6 states have call successors, (43), 4 states have call predecessors, (43), 7 states have return successors, (42), 8 states have call predecessors, (42), 6 states have call successors, (42) [2021-12-21 13:25:57,751 INFO L276 IsEmpty]: Start isEmpty. Operand 6242 states and 8100 transitions. [2021-12-21 13:25:57,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-21 13:25:57,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:57,761 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] [2021-12-21 13:25:57,786 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 13:25:57,985 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,SelfDestructingSolverStorable27 [2021-12-21 13:25:57,986 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:57,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:57,986 INFO L85 PathProgramCache]: Analyzing trace with hash 2073750461, now seen corresponding path program 1 times [2021-12-21 13:25:57,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:57,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140998273] [2021-12-21 13:25:57,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:57,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:25:58,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 13:25:58,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 13:25:58,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-21 13:25:58,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-21 13:25:58,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-21 13:25:58,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 13:25:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-21 13:25:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-21 13:25:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-21 13:25:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-21 13:25:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-12-21 13:25:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-21 13:25:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-21 13:25:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-21 13:25:58,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:58,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140998273] [2021-12-21 13:25:58,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140998273] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:58,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:58,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:25:58,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405859474] [2021-12-21 13:25:58,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:58,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:25:58,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:58,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:25:58,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:25:58,113 INFO L87 Difference]: Start difference. First operand 6242 states and 8100 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 13:26:00,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:00,055 INFO L93 Difference]: Finished difference Result 20990 states and 27898 transitions. [2021-12-21 13:26:00,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 13:26:00,056 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 13:26:00,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:00,105 INFO L225 Difference]: With dead ends: 20990 [2021-12-21 13:26:00,106 INFO L226 Difference]: Without dead ends: 15098 [2021-12-21 13:26:00,123 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 13:26:00,128 INFO L933 BasicCegarLoop]: 566 mSDtfsCounter, 801 mSDsluCounter, 2482 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 3048 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:00,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [820 Valid, 3048 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:26:00,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15098 states. [2021-12-21 13:26:01,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15098 to 8084. [2021-12-21 13:26:01,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8084 states, 6028 states have (on average 1.3012607830126077) internal successors, (7844), 6079 states have internal predecessors, (7844), 1335 states have call successors, (1335), 720 states have call predecessors, (1335), 720 states have return successors, (1335), 1284 states have call predecessors, (1335), 1335 states have call successors, (1335) [2021-12-21 13:26:01,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8084 states to 8084 states and 10514 transitions. [2021-12-21 13:26:01,089 INFO L78 Accepts]: Start accepts. Automaton has 8084 states and 10514 transitions. Word has length 194 [2021-12-21 13:26:01,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:01,089 INFO L470 AbstractCegarLoop]: Abstraction has 8084 states and 10514 transitions. [2021-12-21 13:26:01,090 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 13:26:01,090 INFO L276 IsEmpty]: Start isEmpty. Operand 8084 states and 10514 transitions. [2021-12-21 13:26:01,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-21 13:26:01,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:01,104 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:26:01,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-21 13:26:01,105 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:01,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:01,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1452894841, now seen corresponding path program 1 times [2021-12-21 13:26:01,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:01,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490113194] [2021-12-21 13:26:01,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:01,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:01,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:26:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:01,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:26:01,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:01,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 13:26:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:01,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 13:26:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:01,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-21 13:26:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:01,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-21 13:26:01,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:01,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-21 13:26:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:01,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 13:26:01,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:01,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-21 13:26:01,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:01,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-21 13:26:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:01,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-12-21 13:26:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:01,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-21 13:26:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:01,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-21 13:26:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:01,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-21 13:26:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:01,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-21 13:26:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-21 13:26:01,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:01,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490113194] [2021-12-21 13:26:01,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490113194] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:26:01,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963825448] [2021-12-21 13:26:01,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:01,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:26:01,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:26:01,304 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 13:26:01,305 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 13:26:01,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:01,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 13:26:01,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:26:01,827 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 49 proven. 6 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-21 13:26:01,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:26:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-21 13:26:02,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963825448] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 13:26:02,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 13:26:02,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2021-12-21 13:26:02,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547013957] [2021-12-21 13:26:02,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:02,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:26:02,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:02,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:26:02,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:26:02,152 INFO L87 Difference]: Start difference. First operand 8084 states and 10514 transitions. Second operand has 5 states, 4 states have (on average 27.75) internal successors, (111), 5 states have internal predecessors, (111), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-21 13:26:02,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:02,741 INFO L93 Difference]: Finished difference Result 13320 states and 17375 transitions. [2021-12-21 13:26:02,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:26:02,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 27.75) internal successors, (111), 5 states have internal predecessors, (111), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 3 states have call successors, (14) Word has length 195 [2021-12-21 13:26:02,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:02,759 INFO L225 Difference]: With dead ends: 13320 [2021-12-21 13:26:02,759 INFO L226 Difference]: Without dead ends: 5440 [2021-12-21 13:26:02,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:26:02,772 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 2 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:02,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 859 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:26:02,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5440 states. [2021-12-21 13:26:03,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5440 to 5440. [2021-12-21 13:26:03,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5440 states, 4058 states have (on average 1.3013799901429275) internal successors, (5281), 4092 states have internal predecessors, (5281), 901 states have call successors, (901), 480 states have call predecessors, (901), 480 states have return successors, (901), 867 states have call predecessors, (901), 901 states have call successors, (901) [2021-12-21 13:26:03,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5440 states to 5440 states and 7083 transitions. [2021-12-21 13:26:03,352 INFO L78 Accepts]: Start accepts. Automaton has 5440 states and 7083 transitions. Word has length 195 [2021-12-21 13:26:03,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:03,352 INFO L470 AbstractCegarLoop]: Abstraction has 5440 states and 7083 transitions. [2021-12-21 13:26:03,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 27.75) internal successors, (111), 5 states have internal predecessors, (111), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-21 13:26:03,353 INFO L276 IsEmpty]: Start isEmpty. Operand 5440 states and 7083 transitions. [2021-12-21 13:26:03,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-21 13:26:03,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:03,361 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] [2021-12-21 13:26:03,385 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 13:26:03,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:26:03,576 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:03,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:03,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1119904118, now seen corresponding path program 1 times [2021-12-21 13:26:03,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:03,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189637094] [2021-12-21 13:26:03,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:03,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:03,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:26:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:26:03,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 13:26:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 13:26:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-21 13:26:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-21 13:26:03,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-21 13:26:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 13:26:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-21 13:26:03,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-21 13:26:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-12-21 13:26:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-21 13:26:03,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-21 13:26:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-21 13:26:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-21 13:26:03,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,770 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-21 13:26:03,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:03,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189637094] [2021-12-21 13:26:03,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189637094] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:26:03,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170766294] [2021-12-21 13:26:03,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:03,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:26:03,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:26:03,772 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 13:26:03,773 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 13:26:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 13:26:03,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:26:04,294 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 51 proven. 4 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-21 13:26:04,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:26:04,631 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-21 13:26:04,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170766294] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:26:04,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:26:04,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2021-12-21 13:26:04,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177548236] [2021-12-21 13:26:04,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:26:04,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 13:26:04,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:04,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 13:26:04,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-12-21 13:26:04,633 INFO L87 Difference]: Start difference. First operand 5440 states and 7083 transitions. Second operand has 17 states, 17 states have (on average 14.352941176470589) internal successors, (244), 16 states have internal predecessors, (244), 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 13:26:08,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:08,822 INFO L93 Difference]: Finished difference Result 15340 states and 20999 transitions. [2021-12-21 13:26:08,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-21 13:26:08,822 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 14.352941176470589) internal successors, (244), 16 states have internal predecessors, (244), 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 195 [2021-12-21 13:26:08,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:08,855 INFO L225 Difference]: With dead ends: 15340 [2021-12-21 13:26:08,856 INFO L226 Difference]: Without dead ends: 10105 [2021-12-21 13:26:08,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=662, Invalid=4168, Unknown=0, NotChecked=0, Total=4830 [2021-12-21 13:26:08,869 INFO L933 BasicCegarLoop]: 562 mSDtfsCounter, 3192 mSDsluCounter, 5433 mSDsCounter, 0 mSdLazyCounter, 3840 mSolverCounterSat, 1184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3192 SdHoareTripleChecker+Valid, 5995 SdHoareTripleChecker+Invalid, 5024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1184 IncrementalHoareTripleChecker+Valid, 3840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:08,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3192 Valid, 5995 Invalid, 5024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1184 Valid, 3840 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-21 13:26:08,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10105 states. [2021-12-21 13:26:09,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10105 to 6038. [2021-12-21 13:26:09,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6038 states, 4502 states have (on average 1.2972012438916036) internal successors, (5840), 4540 states have internal predecessors, (5840), 998 states have call successors, (998), 537 states have call predecessors, (998), 537 states have return successors, (998), 960 states have call predecessors, (998), 998 states have call successors, (998) [2021-12-21 13:26:09,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6038 states to 6038 states and 7836 transitions. [2021-12-21 13:26:09,728 INFO L78 Accepts]: Start accepts. Automaton has 6038 states and 7836 transitions. Word has length 195 [2021-12-21 13:26:09,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:09,728 INFO L470 AbstractCegarLoop]: Abstraction has 6038 states and 7836 transitions. [2021-12-21 13:26:09,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.352941176470589) internal successors, (244), 16 states have internal predecessors, (244), 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 13:26:09,729 INFO L276 IsEmpty]: Start isEmpty. Operand 6038 states and 7836 transitions. [2021-12-21 13:26:09,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-21 13:26:09,737 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:09,737 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:26:09,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 13:26:09,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:26:09,962 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:09,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:09,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1845710140, now seen corresponding path program 1 times [2021-12-21 13:26:09,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:09,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141880487] [2021-12-21 13:26:09,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:09,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:10,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:26:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:10,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:26:10,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:10,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 13:26:10,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:10,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 13:26:10,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:10,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-21 13:26:10,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:10,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-21 13:26:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:10,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-21 13:26:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:10,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 13:26:10,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:10,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-21 13:26:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:10,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-21 13:26:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:10,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-21 13:26:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:10,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-21 13:26:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:10,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-21 13:26:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:10,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-21 13:26:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:10,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-21 13:26:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:10,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-12-21 13:26:10,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-21 13:26:10,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:10,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141880487] [2021-12-21 13:26:10,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141880487] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:10,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:10,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:26:10,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501341281] [2021-12-21 13:26:10,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:10,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:26:10,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:10,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:26:10,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:26:10,126 INFO L87 Difference]: Start difference. First operand 6038 states and 7836 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-21 13:26:10,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:10,793 INFO L93 Difference]: Finished difference Result 11521 states and 15006 transitions. [2021-12-21 13:26:10,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:26:10,795 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 203 [2021-12-21 13:26:10,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:10,809 INFO L225 Difference]: With dead ends: 11521 [2021-12-21 13:26:10,809 INFO L226 Difference]: Without dead ends: 5677 [2021-12-21 13:26:10,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 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 13:26:10,818 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 449 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:10,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 438 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:26:10,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5677 states. [2021-12-21 13:26:11,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5677 to 5677. [2021-12-21 13:26:11,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5677 states, 4235 states have (on average 1.298229043683589) internal successors, (5498), 4271 states have internal predecessors, (5498), 938 states have call successors, (938), 503 states have call predecessors, (938), 503 states have return successors, (938), 902 states have call predecessors, (938), 938 states have call successors, (938) [2021-12-21 13:26:11,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5677 states to 5677 states and 7374 transitions. [2021-12-21 13:26:11,482 INFO L78 Accepts]: Start accepts. Automaton has 5677 states and 7374 transitions. Word has length 203 [2021-12-21 13:26:11,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:11,482 INFO L470 AbstractCegarLoop]: Abstraction has 5677 states and 7374 transitions. [2021-12-21 13:26:11,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-21 13:26:11,483 INFO L276 IsEmpty]: Start isEmpty. Operand 5677 states and 7374 transitions. [2021-12-21 13:26:11,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-12-21 13:26:11,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:11,492 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 13:26:11,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-21 13:26:11,492 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:11,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:11,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1739070418, now seen corresponding path program 1 times [2021-12-21 13:26:11,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:11,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684570800] [2021-12-21 13:26:11,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:11,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:11,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:26:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:11,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:26:11,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:11,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 13:26:11,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:11,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 13:26:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:11,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-21 13:26:11,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:11,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-21 13:26:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:11,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-21 13:26:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:11,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 13:26:11,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:11,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-21 13:26:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:11,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-21 13:26:11,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:11,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-21 13:26:11,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:11,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-21 13:26:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:11,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-21 13:26:11,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:11,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-21 13:26:11,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:11,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2021-12-21 13:26:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:11,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-12-21 13:26:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 28 proven. 19 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-21 13:26:11,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:11,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684570800] [2021-12-21 13:26:11,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684570800] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:26:11,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420049053] [2021-12-21 13:26:11,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:11,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:26:11,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:26:11,688 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 13:26:11,711 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 13:26:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:11,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 13:26:11,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:26:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 80 proven. 4 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-21 13:26:12,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:26:12,518 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 42 proven. 6 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-21 13:26:12,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420049053] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:26:12,518 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:26:12,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2021-12-21 13:26:12,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471522030] [2021-12-21 13:26:12,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:26:12,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 13:26:12,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:12,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 13:26:12,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-12-21 13:26:12,521 INFO L87 Difference]: Start difference. First operand 5677 states and 7374 transitions. Second operand has 17 states, 17 states have (on average 15.411764705882353) internal successors, (262), 16 states have internal predecessors, (262), 6 states have call successors, (40), 4 states have call predecessors, (40), 6 states have return successors, (40), 7 states have call predecessors, (40), 6 states have call successors, (40) [2021-12-21 13:26:18,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:18,010 INFO L93 Difference]: Finished difference Result 16844 states and 23130 transitions. [2021-12-21 13:26:18,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-21 13:26:18,011 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 15.411764705882353) internal successors, (262), 16 states have internal predecessors, (262), 6 states have call successors, (40), 4 states have call predecessors, (40), 6 states have return successors, (40), 7 states have call predecessors, (40), 6 states have call successors, (40) Word has length 204 [2021-12-21 13:26:18,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:18,038 INFO L225 Difference]: With dead ends: 16844 [2021-12-21 13:26:18,038 INFO L226 Difference]: Without dead ends: 11372 [2021-12-21 13:26:18,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 441 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2055 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=886, Invalid=5594, Unknown=0, NotChecked=0, Total=6480 [2021-12-21 13:26:18,049 INFO L933 BasicCegarLoop]: 631 mSDtfsCounter, 2973 mSDsluCounter, 6257 mSDsCounter, 0 mSdLazyCounter, 5191 mSolverCounterSat, 1461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2973 SdHoareTripleChecker+Valid, 6888 SdHoareTripleChecker+Invalid, 6652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1461 IncrementalHoareTripleChecker+Valid, 5191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:18,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2973 Valid, 6888 Invalid, 6652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1461 Valid, 5191 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-21 13:26:18,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11372 states. [2021-12-21 13:26:19,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11372 to 6321. [2021-12-21 13:26:19,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6321 states, 4723 states have (on average 1.2945161973322041) internal successors, (6114), 4763 states have internal predecessors, (6114), 1036 states have call successors, (1036), 561 states have call predecessors, (1036), 561 states have return successors, (1036), 996 states have call predecessors, (1036), 1036 states have call successors, (1036) [2021-12-21 13:26:19,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6321 states to 6321 states and 8186 transitions. [2021-12-21 13:26:19,032 INFO L78 Accepts]: Start accepts. Automaton has 6321 states and 8186 transitions. Word has length 204 [2021-12-21 13:26:19,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:19,033 INFO L470 AbstractCegarLoop]: Abstraction has 6321 states and 8186 transitions. [2021-12-21 13:26:19,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.411764705882353) internal successors, (262), 16 states have internal predecessors, (262), 6 states have call successors, (40), 4 states have call predecessors, (40), 6 states have return successors, (40), 7 states have call predecessors, (40), 6 states have call successors, (40) [2021-12-21 13:26:19,033 INFO L276 IsEmpty]: Start isEmpty. Operand 6321 states and 8186 transitions. [2021-12-21 13:26:19,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-12-21 13:26:19,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:19,043 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:26:19,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0