./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/systemc/mem_slave_tlm.4.cil.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 69030034dd333d91bcd0f7615fd4a158a32a8c2c03a6334daabdaad4c77a89b5 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 11:42:52,659 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 11:42:52,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 11:42:52,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 11:42:52,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 11:42:52,699 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 11:42:52,700 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 11:42:52,701 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 11:42:52,702 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 11:42:52,703 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 11:42:52,704 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 11:42:52,706 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 11:42:52,706 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 11:42:52,711 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 11:42:52,713 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 11:42:52,714 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 11:42:52,715 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 11:42:52,717 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 11:42:52,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 11:42:52,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 11:42:52,725 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 11:42:52,726 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 11:42:52,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 11:42:52,727 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 11:42:52,729 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 11:42:52,732 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 11:42:52,733 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 11:42:52,733 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 11:42:52,734 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 11:42:52,735 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 11:42:52,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 11:42:52,736 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 11:42:52,736 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 11:42:52,737 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 11:42:52,738 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 11:42:52,738 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 11:42:52,739 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 11:42:52,740 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 11:42:52,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 11:42:52,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 11:42:52,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 11:42:52,742 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 11:42:52,768 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 11:42:52,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 11:42:52,770 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 11:42:52,770 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 11:42:52,771 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 11:42:52,771 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 11:42:52,771 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 11:42:52,772 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 11:42:52,772 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 11:42:52,772 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 11:42:52,773 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 11:42:52,773 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 11:42:52,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 11:42:52,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 11:42:52,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 11:42:52,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 11:42:52,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 11:42:52,774 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 11:42:52,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 11:42:52,774 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 11:42:52,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 11:42:52,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 11:42:52,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 11:42:52,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 11:42:52,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:42:52,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 11:42:52,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 11:42:52,775 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 11:42:52,776 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 11:42:52,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 11:42:52,776 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 11:42:52,776 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 11:42:52,776 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 11:42:52,776 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 11:42:52,777 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69030034dd333d91bcd0f7615fd4a158a32a8c2c03a6334daabdaad4c77a89b5 [2021-12-22 11:42:52,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 11:42:52,977 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 11:42:52,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 11:42:52,981 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 11:42:52,981 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 11:42:52,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c [2021-12-22 11:42:53,045 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/800d7ecd7/273b2bd4fcf94eac97ae72c5b1a309da/FLAGcf8275b54 [2021-12-22 11:42:53,455 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 11:42:53,456 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c [2021-12-22 11:42:53,465 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/800d7ecd7/273b2bd4fcf94eac97ae72c5b1a309da/FLAGcf8275b54 [2021-12-22 11:42:53,865 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/800d7ecd7/273b2bd4fcf94eac97ae72c5b1a309da [2021-12-22 11:42:53,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 11:42:53,869 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 11:42:53,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 11:42:53,871 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 11:42:53,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 11:42:53,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:42:53" (1/1) ... [2021-12-22 11:42:53,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4033215a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:42:53, skipping insertion in model container [2021-12-22 11:42:53,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:42:53" (1/1) ... [2021-12-22 11:42:53,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 11:42:53,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 11:42:54,048 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/systemc/mem_slave_tlm.4.cil.c[646,659] [2021-12-22 11:42:54,143 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:42:54,151 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 11:42:54,158 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/systemc/mem_slave_tlm.4.cil.c[646,659] [2021-12-22 11:42:54,206 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:42:54,217 INFO L208 MainTranslator]: Completed translation [2021-12-22 11:42:54,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:42:54 WrapperNode [2021-12-22 11:42:54,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 11:42:54,219 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 11:42:54,219 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 11:42:54,219 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 11:42:54,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:42:54" (1/1) ... [2021-12-22 11:42:54,232 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:42:54" (1/1) ... [2021-12-22 11:42:54,261 INFO L137 Inliner]: procedures = 19, calls = 18, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 861 [2021-12-22 11:42:54,261 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 11:42:54,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 11:42:54,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 11:42:54,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 11:42:54,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:42:54" (1/1) ... [2021-12-22 11:42:54,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:42:54" (1/1) ... [2021-12-22 11:42:54,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:42:54" (1/1) ... [2021-12-22 11:42:54,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:42:54" (1/1) ... [2021-12-22 11:42:54,281 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:42:54" (1/1) ... [2021-12-22 11:42:54,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:42:54" (1/1) ... [2021-12-22 11:42:54,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:42:54" (1/1) ... [2021-12-22 11:42:54,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 11:42:54,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 11:42:54,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 11:42:54,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 11:42:54,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:42:54" (1/1) ... [2021-12-22 11:42:54,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:42:54,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:42:54,332 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) [2021-12-22 11:42:54,335 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 [2021-12-22 11:42:54,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 11:42:54,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 11:42:54,357 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-22 11:42:54,357 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-22 11:42:54,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 11:42:54,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 11:42:54,422 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 11:42:54,423 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 11:42:54,981 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 11:42:54,991 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 11:42:54,991 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-12-22 11:42:54,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:42:54 BoogieIcfgContainer [2021-12-22 11:42:54,994 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 11:42:54,995 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 11:42:54,995 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 11:42:54,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 11:42:54,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:42:53" (1/3) ... [2021-12-22 11:42:54,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4024f0d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:42:54, skipping insertion in model container [2021-12-22 11:42:54,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:42:54" (2/3) ... [2021-12-22 11:42:54,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4024f0d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:42:54, skipping insertion in model container [2021-12-22 11:42:54,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:42:54" (3/3) ... [2021-12-22 11:42:55,001 INFO L111 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.4.cil.c [2021-12-22 11:42:55,005 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 11:42:55,006 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 11:42:55,060 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 11:42:55,065 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 [2021-12-22 11:42:55,065 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 11:42:55,090 INFO L276 IsEmpty]: Start isEmpty. Operand has 277 states, 269 states have (on average 1.8550185873605949) internal successors, (499), 275 states have internal predecessors, (499), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-22 11:42:55,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-22 11:42:55,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:42:55,097 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] [2021-12-22 11:42:55,098 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:42:55,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:42:55,102 INFO L85 PathProgramCache]: Analyzing trace with hash 193087539, now seen corresponding path program 1 times [2021-12-22 11:42:55,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:42:55,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496319556] [2021-12-22 11:42:55,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:42:55,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:42:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:42:55,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:42:55,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:42:55,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496319556] [2021-12-22 11:42:55,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496319556] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:42:55,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:42:55,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:42:55,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875673322] [2021-12-22 11:42:55,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:42:55,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:42:55,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:42:55,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:42:55,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:42:55,327 INFO L87 Difference]: Start difference. First operand has 277 states, 269 states have (on average 1.8550185873605949) internal successors, (499), 275 states have internal predecessors, (499), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:55,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:42:55,655 INFO L93 Difference]: Finished difference Result 730 states and 1341 transitions. [2021-12-22 11:42:55,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:42:55,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-22 11:42:55,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:42:55,667 INFO L225 Difference]: With dead ends: 730 [2021-12-22 11:42:55,667 INFO L226 Difference]: Without dead ends: 450 [2021-12-22 11:42:55,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:42:55,674 INFO L933 BasicCegarLoop]: 479 mSDtfsCounter, 267 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:42:55,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 789 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:42:55,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-12-22 11:42:55,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 437. [2021-12-22 11:42:55,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 431 states have (on average 1.6009280742459397) internal successors, (690), 435 states have internal predecessors, (690), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:55,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 695 transitions. [2021-12-22 11:42:55,741 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 695 transitions. Word has length 29 [2021-12-22 11:42:55,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:42:55,742 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 695 transitions. [2021-12-22 11:42:55,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:55,742 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 695 transitions. [2021-12-22 11:42:55,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-22 11:42:55,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:42:55,745 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] [2021-12-22 11:42:55,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 11:42:55,745 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:42:55,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:42:55,746 INFO L85 PathProgramCache]: Analyzing trace with hash 909656450, now seen corresponding path program 1 times [2021-12-22 11:42:55,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:42:55,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500239819] [2021-12-22 11:42:55,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:42:55,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:42:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:42:55,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:42:55,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:42:55,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500239819] [2021-12-22 11:42:55,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500239819] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:42:55,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:42:55,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:42:55,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129479551] [2021-12-22 11:42:55,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:42:55,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:42:55,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:42:55,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:42:55,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:42:55,810 INFO L87 Difference]: Start difference. First operand 437 states and 695 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:55,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:42:55,911 INFO L93 Difference]: Finished difference Result 1149 states and 1853 transitions. [2021-12-22 11:42:55,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:42:55,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-22 11:42:55,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:42:55,916 INFO L225 Difference]: With dead ends: 1149 [2021-12-22 11:42:55,916 INFO L226 Difference]: Without dead ends: 726 [2021-12-22 11:42:55,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:42:55,919 INFO L933 BasicCegarLoop]: 650 mSDtfsCounter, 330 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:42:55,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 1032 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:42:55,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2021-12-22 11:42:55,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 713. [2021-12-22 11:42:55,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 707 states have (on average 1.6350777934936351) internal successors, (1156), 711 states have internal predecessors, (1156), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:55,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1161 transitions. [2021-12-22 11:42:55,949 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1161 transitions. Word has length 40 [2021-12-22 11:42:55,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:42:55,949 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 1161 transitions. [2021-12-22 11:42:55,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:55,949 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1161 transitions. [2021-12-22 11:42:55,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-22 11:42:55,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:42:55,952 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] [2021-12-22 11:42:55,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 11:42:55,952 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:42:55,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:42:55,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1642726185, now seen corresponding path program 1 times [2021-12-22 11:42:55,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:42:55,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661356845] [2021-12-22 11:42:55,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:42:55,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:42:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:42:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:42:56,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:42:56,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661356845] [2021-12-22 11:42:56,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661356845] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:42:56,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:42:56,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:42:56,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431246835] [2021-12-22 11:42:56,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:42:56,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:42:56,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:42:56,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:42:56,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:42:56,013 INFO L87 Difference]: Start difference. First operand 713 states and 1161 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:56,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:42:56,045 INFO L93 Difference]: Finished difference Result 1793 states and 2916 transitions. [2021-12-22 11:42:56,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:42:56,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-22 11:42:56,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:42:56,050 INFO L225 Difference]: With dead ends: 1793 [2021-12-22 11:42:56,050 INFO L226 Difference]: Without dead ends: 1105 [2021-12-22 11:42:56,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:42:56,052 INFO L933 BasicCegarLoop]: 451 mSDtfsCounter, 357 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:42:56,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 817 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:42:56,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-12-22 11:42:56,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 1094. [2021-12-22 11:42:56,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1088 states have (on average 1.6231617647058822) internal successors, (1766), 1092 states have internal predecessors, (1766), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:56,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1771 transitions. [2021-12-22 11:42:56,081 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1771 transitions. Word has length 41 [2021-12-22 11:42:56,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:42:56,082 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 1771 transitions. [2021-12-22 11:42:56,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:56,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1771 transitions. [2021-12-22 11:42:56,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 11:42:56,085 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:42:56,085 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 11:42:56,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 11:42:56,086 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:42:56,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:42:56,086 INFO L85 PathProgramCache]: Analyzing trace with hash -49710902, now seen corresponding path program 1 times [2021-12-22 11:42:56,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:42:56,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039922291] [2021-12-22 11:42:56,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:42:56,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:42:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:42:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:42:56,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:42:56,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039922291] [2021-12-22 11:42:56,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039922291] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:42:56,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:42:56,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:42:56,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444217613] [2021-12-22 11:42:56,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:42:56,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:42:56,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:42:56,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:42:56,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:42:56,145 INFO L87 Difference]: Start difference. First operand 1094 states and 1771 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:56,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:42:56,375 INFO L93 Difference]: Finished difference Result 3018 states and 4863 transitions. [2021-12-22 11:42:56,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:42:56,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-22 11:42:56,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:42:56,382 INFO L225 Difference]: With dead ends: 3018 [2021-12-22 11:42:56,382 INFO L226 Difference]: Without dead ends: 1949 [2021-12-22 11:42:56,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:42:56,385 INFO L933 BasicCegarLoop]: 702 mSDtfsCounter, 588 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:42:56,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 1586 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:42:56,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1949 states. [2021-12-22 11:42:56,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1949 to 1716. [2021-12-22 11:42:56,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1710 states have (on average 1.5988304093567252) internal successors, (2734), 1714 states have internal predecessors, (2734), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:56,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 2739 transitions. [2021-12-22 11:42:56,428 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 2739 transitions. Word has length 48 [2021-12-22 11:42:56,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:42:56,429 INFO L470 AbstractCegarLoop]: Abstraction has 1716 states and 2739 transitions. [2021-12-22 11:42:56,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:56,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 2739 transitions. [2021-12-22 11:42:56,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-22 11:42:56,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:42:56,430 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] [2021-12-22 11:42:56,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 11:42:56,430 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:42:56,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:42:56,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1086798880, now seen corresponding path program 1 times [2021-12-22 11:42:56,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:42:56,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70287265] [2021-12-22 11:42:56,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:42:56,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:42:56,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:42:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:42:56,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:42:56,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70287265] [2021-12-22 11:42:56,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70287265] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:42:56,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:42:56,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:42:56,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182156366] [2021-12-22 11:42:56,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:42:56,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:42:56,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:42:56,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:42:56,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:42:56,467 INFO L87 Difference]: Start difference. First operand 1716 states and 2739 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:56,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:42:56,783 INFO L93 Difference]: Finished difference Result 5101 states and 8048 transitions. [2021-12-22 11:42:56,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:42:56,783 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-22 11:42:56,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:42:56,794 INFO L225 Difference]: With dead ends: 5101 [2021-12-22 11:42:56,795 INFO L226 Difference]: Without dead ends: 3404 [2021-12-22 11:42:56,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:42:56,799 INFO L933 BasicCegarLoop]: 396 mSDtfsCounter, 750 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:42:56,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [750 Valid, 1077 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:42:56,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3404 states. [2021-12-22 11:42:56,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3404 to 3026. [2021-12-22 11:42:56,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3026 states, 3020 states have (on average 1.57317880794702) internal successors, (4751), 3024 states have internal predecessors, (4751), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:56,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3026 states to 3026 states and 4756 transitions. [2021-12-22 11:42:56,889 INFO L78 Accepts]: Start accepts. Automaton has 3026 states and 4756 transitions. Word has length 53 [2021-12-22 11:42:56,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:42:56,889 INFO L470 AbstractCegarLoop]: Abstraction has 3026 states and 4756 transitions. [2021-12-22 11:42:56,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:56,890 INFO L276 IsEmpty]: Start isEmpty. Operand 3026 states and 4756 transitions. [2021-12-22 11:42:56,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-22 11:42:56,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:42:56,891 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] [2021-12-22 11:42:56,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 11:42:56,892 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:42:56,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:42:56,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1057985257, now seen corresponding path program 1 times [2021-12-22 11:42:56,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:42:56,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949052267] [2021-12-22 11:42:56,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:42:56,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:42:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:42:56,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:42:56,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:42:56,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949052267] [2021-12-22 11:42:56,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949052267] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:42:56,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:42:56,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:42:56,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549942286] [2021-12-22 11:42:56,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:42:56,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:42:56,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:42:56,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:42:56,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:42:56,924 INFO L87 Difference]: Start difference. First operand 3026 states and 4756 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:57,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:42:57,023 INFO L93 Difference]: Finished difference Result 7113 states and 11141 transitions. [2021-12-22 11:42:57,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:42:57,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-22 11:42:57,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:42:57,040 INFO L225 Difference]: With dead ends: 7113 [2021-12-22 11:42:57,040 INFO L226 Difference]: Without dead ends: 4110 [2021-12-22 11:42:57,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:42:57,047 INFO L933 BasicCegarLoop]: 448 mSDtfsCounter, 372 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:42:57,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 720 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:42:57,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4110 states. [2021-12-22 11:42:57,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4110 to 3926. [2021-12-22 11:42:57,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 3920 states have (on average 1.5543367346938775) internal successors, (6093), 3924 states have internal predecessors, (6093), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:57,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 6098 transitions. [2021-12-22 11:42:57,221 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 6098 transitions. Word has length 53 [2021-12-22 11:42:57,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:42:57,222 INFO L470 AbstractCegarLoop]: Abstraction has 3926 states and 6098 transitions. [2021-12-22 11:42:57,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:57,222 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 6098 transitions. [2021-12-22 11:42:57,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-22 11:42:57,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:42:57,224 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, 1, 1, 1, 1, 1, 1] [2021-12-22 11:42:57,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 11:42:57,224 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:42:57,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:42:57,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1585990245, now seen corresponding path program 1 times [2021-12-22 11:42:57,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:42:57,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190615794] [2021-12-22 11:42:57,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:42:57,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:42:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:42:57,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:42:57,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:42:57,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190615794] [2021-12-22 11:42:57,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190615794] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:42:57,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:42:57,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:42:57,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82824076] [2021-12-22 11:42:57,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:42:57,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:42:57,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:42:57,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:42:57,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:42:57,320 INFO L87 Difference]: Start difference. First operand 3926 states and 6098 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:57,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:42:57,719 INFO L93 Difference]: Finished difference Result 9442 states and 14788 transitions. [2021-12-22 11:42:57,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:42:57,720 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-22 11:42:57,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:42:57,734 INFO L225 Difference]: With dead ends: 9442 [2021-12-22 11:42:57,734 INFO L226 Difference]: Without dead ends: 5539 [2021-12-22 11:42:57,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:42:57,738 INFO L933 BasicCegarLoop]: 593 mSDtfsCounter, 254 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 11:42:57,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 889 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 11:42:57,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5539 states. [2021-12-22 11:42:57,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5539 to 4758. [2021-12-22 11:42:57,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4758 states, 4752 states have (on average 1.4983164983164983) internal successors, (7120), 4756 states have internal predecessors, (7120), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:57,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4758 states to 4758 states and 7125 transitions. [2021-12-22 11:42:57,904 INFO L78 Accepts]: Start accepts. Automaton has 4758 states and 7125 transitions. Word has length 61 [2021-12-22 11:42:57,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:42:57,905 INFO L470 AbstractCegarLoop]: Abstraction has 4758 states and 7125 transitions. [2021-12-22 11:42:57,905 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:57,905 INFO L276 IsEmpty]: Start isEmpty. Operand 4758 states and 7125 transitions. [2021-12-22 11:42:57,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-22 11:42:57,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:42:57,908 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:42:57,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 11:42:57,908 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:42:57,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:42:57,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1564004079, now seen corresponding path program 1 times [2021-12-22 11:42:57,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:42:57,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7702070] [2021-12-22 11:42:57,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:42:57,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:42:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:42:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:42:57,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:42:57,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7702070] [2021-12-22 11:42:57,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7702070] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:42:57,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:42:57,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:42:57,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325738546] [2021-12-22 11:42:57,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:42:57,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:42:57,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:42:57,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:42:57,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:42:57,967 INFO L87 Difference]: Start difference. First operand 4758 states and 7125 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:58,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:42:58,106 INFO L93 Difference]: Finished difference Result 9359 states and 14027 transitions. [2021-12-22 11:42:58,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:42:58,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-22 11:42:58,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:42:58,120 INFO L225 Difference]: With dead ends: 9359 [2021-12-22 11:42:58,120 INFO L226 Difference]: Without dead ends: 4624 [2021-12-22 11:42:58,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:42:58,127 INFO L933 BasicCegarLoop]: 419 mSDtfsCounter, 349 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:42:58,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 447 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:42:58,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4624 states. [2021-12-22 11:42:58,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4624 to 4624. [2021-12-22 11:42:58,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4624 states, 4618 states have (on average 1.4766132524902555) internal successors, (6819), 4622 states have internal predecessors, (6819), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:58,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4624 states to 4624 states and 6824 transitions. [2021-12-22 11:42:58,264 INFO L78 Accepts]: Start accepts. Automaton has 4624 states and 6824 transitions. Word has length 63 [2021-12-22 11:42:58,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:42:58,264 INFO L470 AbstractCegarLoop]: Abstraction has 4624 states and 6824 transitions. [2021-12-22 11:42:58,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:58,265 INFO L276 IsEmpty]: Start isEmpty. Operand 4624 states and 6824 transitions. [2021-12-22 11:42:58,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-22 11:42:58,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:42:58,267 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:42:58,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 11:42:58,267 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:42:58,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:42:58,268 INFO L85 PathProgramCache]: Analyzing trace with hash 357537147, now seen corresponding path program 1 times [2021-12-22 11:42:58,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:42:58,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313642410] [2021-12-22 11:42:58,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:42:58,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:42:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:42:58,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:42:58,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:42:58,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313642410] [2021-12-22 11:42:58,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313642410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:42:58,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:42:58,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:42:58,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144073086] [2021-12-22 11:42:58,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:42:58,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:42:58,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:42:58,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:42:58,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:42:58,292 INFO L87 Difference]: Start difference. First operand 4624 states and 6824 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:58,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:42:58,429 INFO L93 Difference]: Finished difference Result 9892 states and 14766 transitions. [2021-12-22 11:42:58,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:42:58,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-22 11:42:58,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:42:58,449 INFO L225 Difference]: With dead ends: 9892 [2021-12-22 11:42:58,449 INFO L226 Difference]: Without dead ends: 5291 [2021-12-22 11:42:58,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:42:58,459 INFO L933 BasicCegarLoop]: 598 mSDtfsCounter, 313 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:42:58,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 1010 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:42:58,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5291 states. [2021-12-22 11:42:58,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5291 to 3550. [2021-12-22 11:42:58,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3550 states, 3544 states have (on average 1.4923814898419865) internal successors, (5289), 3548 states have internal predecessors, (5289), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:58,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3550 states to 3550 states and 5294 transitions. [2021-12-22 11:42:58,609 INFO L78 Accepts]: Start accepts. Automaton has 3550 states and 5294 transitions. Word has length 64 [2021-12-22 11:42:58,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:42:58,610 INFO L470 AbstractCegarLoop]: Abstraction has 3550 states and 5294 transitions. [2021-12-22 11:42:58,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:58,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3550 states and 5294 transitions. [2021-12-22 11:42:58,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 11:42:58,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:42:58,611 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:42:58,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 11:42:58,612 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:42:58,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:42:58,612 INFO L85 PathProgramCache]: Analyzing trace with hash 550768718, now seen corresponding path program 1 times [2021-12-22 11:42:58,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:42:58,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263211051] [2021-12-22 11:42:58,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:42:58,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:42:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:42:58,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:42:58,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:42:58,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263211051] [2021-12-22 11:42:58,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263211051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:42:58,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:42:58,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:42:58,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918332923] [2021-12-22 11:42:58,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:42:58,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:42:58,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:42:58,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:42:58,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:42:58,669 INFO L87 Difference]: Start difference. First operand 3550 states and 5294 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:59,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:42:59,513 INFO L93 Difference]: Finished difference Result 16792 states and 24825 transitions. [2021-12-22 11:42:59,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 11:42:59,513 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-22 11:42:59,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:42:59,539 INFO L225 Difference]: With dead ends: 16792 [2021-12-22 11:42:59,539 INFO L226 Difference]: Without dead ends: 13467 [2021-12-22 11:42:59,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-12-22 11:42:59,549 INFO L933 BasicCegarLoop]: 1074 mSDtfsCounter, 2131 mSDsluCounter, 2969 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2131 SdHoareTripleChecker+Valid, 4043 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 11:42:59,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2131 Valid, 4043 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 11:42:59,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13467 states. [2021-12-22 11:42:59,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13467 to 4420. [2021-12-22 11:42:59,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4420 states, 4414 states have (on average 1.4841413683733575) internal successors, (6551), 4418 states have internal predecessors, (6551), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:59,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4420 states to 4420 states and 6556 transitions. [2021-12-22 11:42:59,764 INFO L78 Accepts]: Start accepts. Automaton has 4420 states and 6556 transitions. Word has length 66 [2021-12-22 11:42:59,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:42:59,765 INFO L470 AbstractCegarLoop]: Abstraction has 4420 states and 6556 transitions. [2021-12-22 11:42:59,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:42:59,766 INFO L276 IsEmpty]: Start isEmpty. Operand 4420 states and 6556 transitions. [2021-12-22 11:42:59,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-22 11:42:59,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:42:59,767 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:42:59,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 11:42:59,767 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:42:59,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:42:59,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1157262175, now seen corresponding path program 1 times [2021-12-22 11:42:59,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:42:59,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569966640] [2021-12-22 11:42:59,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:42:59,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:42:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:42:59,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:42:59,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:42:59,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569966640] [2021-12-22 11:42:59,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569966640] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:42:59,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:42:59,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 11:42:59,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358199849] [2021-12-22 11:42:59,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:42:59,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 11:42:59,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:42:59,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 11:42:59,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:42:59,807 INFO L87 Difference]: Start difference. First operand 4420 states and 6556 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:00,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:43:00,954 INFO L93 Difference]: Finished difference Result 30445 states and 44831 transitions. [2021-12-22 11:43:00,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-22 11:43:00,955 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-22 11:43:00,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:43:01,013 INFO L225 Difference]: With dead ends: 30445 [2021-12-22 11:43:01,013 INFO L226 Difference]: Without dead ends: 26250 [2021-12-22 11:43:01,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-12-22 11:43:01,027 INFO L933 BasicCegarLoop]: 1885 mSDtfsCounter, 3829 mSDsluCounter, 6792 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3829 SdHoareTripleChecker+Valid, 8677 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:43:01,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3829 Valid, 8677 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:43:01,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26250 states. [2021-12-22 11:43:01,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26250 to 4730. [2021-12-22 11:43:01,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4730 states, 4724 states have (on average 1.4739627434377647) internal successors, (6963), 4728 states have internal predecessors, (6963), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:01,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4730 states to 4730 states and 6968 transitions. [2021-12-22 11:43:01,430 INFO L78 Accepts]: Start accepts. Automaton has 4730 states and 6968 transitions. Word has length 67 [2021-12-22 11:43:01,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:43:01,430 INFO L470 AbstractCegarLoop]: Abstraction has 4730 states and 6968 transitions. [2021-12-22 11:43:01,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:01,431 INFO L276 IsEmpty]: Start isEmpty. Operand 4730 states and 6968 transitions. [2021-12-22 11:43:01,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-22 11:43:01,432 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:43:01,432 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] [2021-12-22 11:43:01,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 11:43:01,433 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:43:01,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:43:01,433 INFO L85 PathProgramCache]: Analyzing trace with hash 587846131, now seen corresponding path program 1 times [2021-12-22 11:43:01,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:43:01,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445109137] [2021-12-22 11:43:01,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:01,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:43:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:01,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:43:01,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:43:01,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445109137] [2021-12-22 11:43:01,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445109137] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:43:01,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:43:01,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:43:01,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955892157] [2021-12-22 11:43:01,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:43:01,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:43:01,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:43:01,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:43:01,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:43:01,456 INFO L87 Difference]: Start difference. First operand 4730 states and 6968 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:01,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:43:01,666 INFO L93 Difference]: Finished difference Result 9971 states and 14664 transitions. [2021-12-22 11:43:01,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:43:01,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-22 11:43:01,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:43:01,675 INFO L225 Difference]: With dead ends: 9971 [2021-12-22 11:43:01,676 INFO L226 Difference]: Without dead ends: 5262 [2021-12-22 11:43:01,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:43:01,684 INFO L933 BasicCegarLoop]: 452 mSDtfsCounter, 139 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:43:01,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 826 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:43:01,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5262 states. [2021-12-22 11:43:01,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5262 to 5188. [2021-12-22 11:43:01,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5188 states, 5182 states have (on average 1.4698957931300656) internal successors, (7617), 5186 states have internal predecessors, (7617), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:01,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5188 states to 5188 states and 7622 transitions. [2021-12-22 11:43:01,937 INFO L78 Accepts]: Start accepts. Automaton has 5188 states and 7622 transitions. Word has length 79 [2021-12-22 11:43:01,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:43:01,937 INFO L470 AbstractCegarLoop]: Abstraction has 5188 states and 7622 transitions. [2021-12-22 11:43:01,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:01,937 INFO L276 IsEmpty]: Start isEmpty. Operand 5188 states and 7622 transitions. [2021-12-22 11:43:01,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 11:43:01,939 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:43:01,939 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-22 11:43:01,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 11:43:01,939 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:43:01,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:43:01,939 INFO L85 PathProgramCache]: Analyzing trace with hash -880253353, now seen corresponding path program 1 times [2021-12-22 11:43:01,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:43:01,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005237454] [2021-12-22 11:43:01,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:01,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:43:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:01,994 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:43:01,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:43:01,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005237454] [2021-12-22 11:43:01,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005237454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:43:01,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:43:01,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:43:01,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518390653] [2021-12-22 11:43:01,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:43:01,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:43:01,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:43:01,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:43:01,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:43:01,995 INFO L87 Difference]: Start difference. First operand 5188 states and 7622 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:02,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:43:02,491 INFO L93 Difference]: Finished difference Result 13874 states and 20224 transitions. [2021-12-22 11:43:02,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:43:02,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-12-22 11:43:02,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:43:02,506 INFO L225 Difference]: With dead ends: 13874 [2021-12-22 11:43:02,507 INFO L226 Difference]: Without dead ends: 8585 [2021-12-22 11:43:02,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:43:02,515 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 654 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:43:02,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [654 Valid, 1276 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:43:02,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8585 states. [2021-12-22 11:43:02,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8585 to 7651. [2021-12-22 11:43:02,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7651 states, 7645 states have (on average 1.4395029431000654) internal successors, (11005), 7649 states have internal predecessors, (11005), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:02,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7651 states to 7651 states and 11010 transitions. [2021-12-22 11:43:02,869 INFO L78 Accepts]: Start accepts. Automaton has 7651 states and 11010 transitions. Word has length 91 [2021-12-22 11:43:02,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:43:02,869 INFO L470 AbstractCegarLoop]: Abstraction has 7651 states and 11010 transitions. [2021-12-22 11:43:02,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:02,870 INFO L276 IsEmpty]: Start isEmpty. Operand 7651 states and 11010 transitions. [2021-12-22 11:43:02,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-22 11:43:02,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:43:02,872 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-22 11:43:02,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 11:43:02,872 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:43:02,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:43:02,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1094322202, now seen corresponding path program 1 times [2021-12-22 11:43:02,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:43:02,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498916337] [2021-12-22 11:43:02,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:02,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:43:02,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:43:02,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:43:02,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498916337] [2021-12-22 11:43:02,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498916337] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:43:02,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:43:02,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:43:02,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996518256] [2021-12-22 11:43:02,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:43:02,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:43:02,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:43:02,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:43:02,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:43:02,902 INFO L87 Difference]: Start difference. First operand 7651 states and 11010 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:03,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:43:03,081 INFO L93 Difference]: Finished difference Result 11033 states and 15906 transitions. [2021-12-22 11:43:03,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:43:03,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-12-22 11:43:03,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:43:03,090 INFO L225 Difference]: With dead ends: 11033 [2021-12-22 11:43:03,090 INFO L226 Difference]: Without dead ends: 3385 [2021-12-22 11:43:03,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:43:03,099 INFO L933 BasicCegarLoop]: 446 mSDtfsCounter, 343 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:43:03,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 525 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:43:03,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3385 states. [2021-12-22 11:43:03,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3385 to 3332. [2021-12-22 11:43:03,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3332 states, 3326 states have (on average 1.34996993385448) internal successors, (4490), 3330 states have internal predecessors, (4490), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:03,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 4495 transitions. [2021-12-22 11:43:03,291 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 4495 transitions. Word has length 99 [2021-12-22 11:43:03,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:43:03,291 INFO L470 AbstractCegarLoop]: Abstraction has 3332 states and 4495 transitions. [2021-12-22 11:43:03,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:03,292 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 4495 transitions. [2021-12-22 11:43:03,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-22 11:43:03,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:43:03,293 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] [2021-12-22 11:43:03,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 11:43:03,293 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:43:03,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:43:03,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1249050813, now seen corresponding path program 1 times [2021-12-22 11:43:03,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:43:03,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957430768] [2021-12-22 11:43:03,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:03,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:43:03,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:03,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:43:03,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:43:03,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957430768] [2021-12-22 11:43:03,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957430768] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:43:03,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:43:03,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:43:03,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163758765] [2021-12-22 11:43:03,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:43:03,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:43:03,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:43:03,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:43:03,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:43:03,324 INFO L87 Difference]: Start difference. First operand 3332 states and 4495 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:03,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:43:03,898 INFO L93 Difference]: Finished difference Result 12736 states and 17172 transitions. [2021-12-22 11:43:03,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 11:43:03,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-22 11:43:03,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:43:03,913 INFO L225 Difference]: With dead ends: 12736 [2021-12-22 11:43:03,914 INFO L226 Difference]: Without dead ends: 9581 [2021-12-22 11:43:03,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:43:03,926 INFO L933 BasicCegarLoop]: 1086 mSDtfsCounter, 1548 mSDsluCounter, 2326 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1548 SdHoareTripleChecker+Valid, 3412 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:43:03,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1548 Valid, 3412 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:43:03,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9581 states. [2021-12-22 11:43:04,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9581 to 3334. [2021-12-22 11:43:04,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3334 states, 3328 states have (on average 1.3479567307692308) internal successors, (4486), 3332 states have internal predecessors, (4486), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:04,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3334 states to 3334 states and 4491 transitions. [2021-12-22 11:43:04,182 INFO L78 Accepts]: Start accepts. Automaton has 3334 states and 4491 transitions. Word has length 101 [2021-12-22 11:43:04,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:43:04,182 INFO L470 AbstractCegarLoop]: Abstraction has 3334 states and 4491 transitions. [2021-12-22 11:43:04,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:04,183 INFO L276 IsEmpty]: Start isEmpty. Operand 3334 states and 4491 transitions. [2021-12-22 11:43:04,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-22 11:43:04,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:43:04,184 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] [2021-12-22 11:43:04,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 11:43:04,184 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:43:04,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:43:04,185 INFO L85 PathProgramCache]: Analyzing trace with hash 2071034270, now seen corresponding path program 1 times [2021-12-22 11:43:04,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:43:04,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962859520] [2021-12-22 11:43:04,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:04,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:43:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:43:04,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:43:04,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962859520] [2021-12-22 11:43:04,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962859520] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:43:04,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685493708] [2021-12-22 11:43:04,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:04,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:43:04,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:43:04,221 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) [2021-12-22 11:43:04,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 11:43:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:04,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 11:43:04,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:43:04,586 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 11:43:04,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 11:43:04,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685493708] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:43:04,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 11:43:04,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-22 11:43:04,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533269932] [2021-12-22 11:43:04,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:43:04,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:43:04,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:43:04,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:43:04,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:43:04,588 INFO L87 Difference]: Start difference. First operand 3334 states and 4491 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:04,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:43:04,848 INFO L93 Difference]: Finished difference Result 3977 states and 5352 transitions. [2021-12-22 11:43:04,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:43:04,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-12-22 11:43:04,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:43:04,854 INFO L225 Difference]: With dead ends: 3977 [2021-12-22 11:43:04,854 INFO L226 Difference]: Without dead ends: 3973 [2021-12-22 11:43:04,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:43:04,856 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 237 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:43:04,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 811 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:43:04,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3973 states. [2021-12-22 11:43:05,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3973 to 3923. [2021-12-22 11:43:05,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3923 states, 3917 states have (on average 1.34516211386265) internal successors, (5269), 3921 states have internal predecessors, (5269), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:05,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3923 states to 3923 states and 5274 transitions. [2021-12-22 11:43:05,094 INFO L78 Accepts]: Start accepts. Automaton has 3923 states and 5274 transitions. Word has length 103 [2021-12-22 11:43:05,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:43:05,094 INFO L470 AbstractCegarLoop]: Abstraction has 3923 states and 5274 transitions. [2021-12-22 11:43:05,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:05,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3923 states and 5274 transitions. [2021-12-22 11:43:05,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-22 11:43:05,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:43:05,096 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:43:05,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 11:43:05,312 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,SelfDestructingSolverStorable15 [2021-12-22 11:43:05,312 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:43:05,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:43:05,313 INFO L85 PathProgramCache]: Analyzing trace with hash -62225411, now seen corresponding path program 1 times [2021-12-22 11:43:05,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:43:05,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180478588] [2021-12-22 11:43:05,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:05,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:43:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:05,351 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:43:05,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:43:05,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180478588] [2021-12-22 11:43:05,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180478588] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:43:05,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277250090] [2021-12-22 11:43:05,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:05,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:43:05,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:43:05,352 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) [2021-12-22 11:43:05,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 11:43:05,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:05,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 11:43:05,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:43:05,759 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 11:43:05,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 11:43:05,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277250090] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:43:05,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 11:43:05,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-22 11:43:05,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297500942] [2021-12-22 11:43:05,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:43:05,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:43:05,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:43:05,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:43:05,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:43:05,761 INFO L87 Difference]: Start difference. First operand 3923 states and 5274 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:05,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:43:05,994 INFO L93 Difference]: Finished difference Result 6990 states and 9448 transitions. [2021-12-22 11:43:05,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:43:05,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2021-12-22 11:43:05,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:43:05,998 INFO L225 Difference]: With dead ends: 6990 [2021-12-22 11:43:05,999 INFO L226 Difference]: Without dead ends: 3072 [2021-12-22 11:43:06,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:43:06,004 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 268 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:43:06,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 426 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:43:06,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2021-12-22 11:43:06,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 2850. [2021-12-22 11:43:06,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2850 states, 2844 states have (on average 1.3259493670886076) internal successors, (3771), 2848 states have internal predecessors, (3771), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:06,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2850 states to 2850 states and 3776 transitions. [2021-12-22 11:43:06,172 INFO L78 Accepts]: Start accepts. Automaton has 2850 states and 3776 transitions. Word has length 159 [2021-12-22 11:43:06,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:43:06,173 INFO L470 AbstractCegarLoop]: Abstraction has 2850 states and 3776 transitions. [2021-12-22 11:43:06,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:06,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2850 states and 3776 transitions. [2021-12-22 11:43:06,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-22 11:43:06,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:43:06,175 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:43:06,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 11:43:06,391 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,SelfDestructingSolverStorable16 [2021-12-22 11:43:06,392 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:43:06,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:43:06,392 INFO L85 PathProgramCache]: Analyzing trace with hash 397670283, now seen corresponding path program 1 times [2021-12-22 11:43:06,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:43:06,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047263894] [2021-12-22 11:43:06,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:06,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:43:06,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 11:43:06,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:43:06,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047263894] [2021-12-22 11:43:06,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047263894] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:43:06,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069319777] [2021-12-22 11:43:06,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:06,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:43:06,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:43:06,432 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) [2021-12-22 11:43:06,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 11:43:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:06,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 11:43:06,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:43:06,744 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 11:43:06,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 11:43:06,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069319777] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:43:06,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 11:43:06,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-22 11:43:06,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462174599] [2021-12-22 11:43:06,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:43:06,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:43:06,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:43:06,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:43:06,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:43:06,746 INFO L87 Difference]: Start difference. First operand 2850 states and 3776 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:06,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:43:06,933 INFO L93 Difference]: Finished difference Result 5528 states and 7365 transitions. [2021-12-22 11:43:06,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:43:06,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2021-12-22 11:43:06,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:43:06,937 INFO L225 Difference]: With dead ends: 5528 [2021-12-22 11:43:06,938 INFO L226 Difference]: Without dead ends: 2850 [2021-12-22 11:43:06,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:43:06,941 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 278 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:43:06,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 398 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:43:06,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2021-12-22 11:43:07,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 2850. [2021-12-22 11:43:07,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2850 states, 2844 states have (on average 1.2921940928270041) internal successors, (3675), 2848 states have internal predecessors, (3675), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:07,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2850 states to 2850 states and 3680 transitions. [2021-12-22 11:43:07,100 INFO L78 Accepts]: Start accepts. Automaton has 2850 states and 3680 transitions. Word has length 162 [2021-12-22 11:43:07,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:43:07,100 INFO L470 AbstractCegarLoop]: Abstraction has 2850 states and 3680 transitions. [2021-12-22 11:43:07,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:07,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2850 states and 3680 transitions. [2021-12-22 11:43:07,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-22 11:43:07,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:43:07,102 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:43:07,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 11:43:07,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-22 11:43:07,329 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:43:07,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:43:07,329 INFO L85 PathProgramCache]: Analyzing trace with hash -276776698, now seen corresponding path program 1 times [2021-12-22 11:43:07,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:43:07,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575190550] [2021-12-22 11:43:07,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:07,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:43:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:07,376 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 11:43:07,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:43:07,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575190550] [2021-12-22 11:43:07,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575190550] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:43:07,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621195725] [2021-12-22 11:43:07,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:07,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:43:07,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:43:07,387 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) [2021-12-22 11:43:07,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 11:43:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:07,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 11:43:07,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:43:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 11:43:07,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 11:43:07,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621195725] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:43:07,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 11:43:07,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-22 11:43:07,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791617742] [2021-12-22 11:43:07,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:43:07,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:43:07,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:43:07,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:43:07,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:43:07,657 INFO L87 Difference]: Start difference. First operand 2850 states and 3680 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:08,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:43:08,022 INFO L93 Difference]: Finished difference Result 6447 states and 8490 transitions. [2021-12-22 11:43:08,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:43:08,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2021-12-22 11:43:08,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:43:08,026 INFO L225 Difference]: With dead ends: 6447 [2021-12-22 11:43:08,027 INFO L226 Difference]: Without dead ends: 3769 [2021-12-22 11:43:08,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:43:08,031 INFO L933 BasicCegarLoop]: 451 mSDtfsCounter, 209 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:43:08,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 674 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:43:08,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3769 states. [2021-12-22 11:43:08,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3769 to 3681. [2021-12-22 11:43:08,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3681 states, 3675 states have (on average 1.2612244897959184) internal successors, (4635), 3679 states have internal predecessors, (4635), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:08,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3681 states to 3681 states and 4640 transitions. [2021-12-22 11:43:08,225 INFO L78 Accepts]: Start accepts. Automaton has 3681 states and 4640 transitions. Word has length 163 [2021-12-22 11:43:08,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:43:08,226 INFO L470 AbstractCegarLoop]: Abstraction has 3681 states and 4640 transitions. [2021-12-22 11:43:08,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:08,226 INFO L276 IsEmpty]: Start isEmpty. Operand 3681 states and 4640 transitions. [2021-12-22 11:43:08,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-22 11:43:08,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:43:08,237 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:43:08,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-22 11:43:08,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:43:08,464 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:43:08,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:43:08,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1158970864, now seen corresponding path program 1 times [2021-12-22 11:43:08,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:43:08,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699323221] [2021-12-22 11:43:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:08,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:43:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 11:43:08,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:43:08,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699323221] [2021-12-22 11:43:08,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699323221] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:43:08,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616807791] [2021-12-22 11:43:08,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:08,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:43:08,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:43:08,554 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) [2021-12-22 11:43:08,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 11:43:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:08,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-22 11:43:08,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:43:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 11:43:09,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:43:09,402 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 11:43:09,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616807791] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:43:09,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:43:09,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2021-12-22 11:43:09,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57531813] [2021-12-22 11:43:09,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:43:09,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 11:43:09,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:43:09,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 11:43:09,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:43:09,404 INFO L87 Difference]: Start difference. First operand 3681 states and 4640 transitions. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:10,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:43:10,729 INFO L93 Difference]: Finished difference Result 18486 states and 23395 transitions. [2021-12-22 11:43:10,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-22 11:43:10,729 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-12-22 11:43:10,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:43:10,750 INFO L225 Difference]: With dead ends: 18486 [2021-12-22 11:43:10,750 INFO L226 Difference]: Without dead ends: 14977 [2021-12-22 11:43:10,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 339 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-12-22 11:43:10,758 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 4143 mSDsluCounter, 4800 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4143 SdHoareTripleChecker+Valid, 5679 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:43:10,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4143 Valid, 5679 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:43:10,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14977 states. [2021-12-22 11:43:11,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14977 to 5218. [2021-12-22 11:43:11,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5218 states, 5212 states have (on average 1.266308518802763) internal successors, (6600), 5216 states have internal predecessors, (6600), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:11,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5218 states to 5218 states and 6605 transitions. [2021-12-22 11:43:11,186 INFO L78 Accepts]: Start accepts. Automaton has 5218 states and 6605 transitions. Word has length 165 [2021-12-22 11:43:11,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:43:11,187 INFO L470 AbstractCegarLoop]: Abstraction has 5218 states and 6605 transitions. [2021-12-22 11:43:11,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:11,187 INFO L276 IsEmpty]: Start isEmpty. Operand 5218 states and 6605 transitions. [2021-12-22 11:43:11,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-12-22 11:43:11,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:43:11,191 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:43:11,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 11:43:11,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:43:11,416 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:43:11,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:43:11,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1576222772, now seen corresponding path program 1 times [2021-12-22 11:43:11,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:43:11,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081971251] [2021-12-22 11:43:11,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:11,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:43:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:11,549 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 10 proven. 196 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 11:43:11,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:43:11,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081971251] [2021-12-22 11:43:11,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081971251] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:43:11,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323466098] [2021-12-22 11:43:11,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:11,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:43:11,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:43:11,564 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 11:43:11,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 11:43:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:11,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-22 11:43:11,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:43:12,457 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 10 proven. 196 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 11:43:12,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:43:13,193 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 10 proven. 196 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 11:43:13,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323466098] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:43:13,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:43:13,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2021-12-22 11:43:13,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449257070] [2021-12-22 11:43:13,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:43:13,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 11:43:13,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:43:13,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 11:43:13,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-22 11:43:13,195 INFO L87 Difference]: Start difference. First operand 5218 states and 6605 transitions. Second operand has 11 states, 11 states have (on average 23.545454545454547) internal successors, (259), 11 states have internal predecessors, (259), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:15,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:43:15,719 INFO L93 Difference]: Finished difference Result 24064 states and 30364 transitions. [2021-12-22 11:43:15,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-22 11:43:15,731 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 23.545454545454547) internal successors, (259), 11 states have internal predecessors, (259), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 265 [2021-12-22 11:43:15,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:43:15,756 INFO L225 Difference]: With dead ends: 24064 [2021-12-22 11:43:15,756 INFO L226 Difference]: Without dead ends: 19018 [2021-12-22 11:43:15,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 543 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=1631, Unknown=0, NotChecked=0, Total=1892 [2021-12-22 11:43:15,775 INFO L933 BasicCegarLoop]: 1480 mSDtfsCounter, 5787 mSDsluCounter, 10268 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5787 SdHoareTripleChecker+Valid, 11748 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 11:43:15,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5787 Valid, 11748 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 11:43:15,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19018 states. [2021-12-22 11:43:16,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19018 to 6629. [2021-12-22 11:43:16,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6629 states, 6623 states have (on average 1.2675524686697872) internal successors, (8395), 6627 states have internal predecessors, (8395), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:16,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6629 states to 6629 states and 8400 transitions. [2021-12-22 11:43:16,293 INFO L78 Accepts]: Start accepts. Automaton has 6629 states and 8400 transitions. Word has length 265 [2021-12-22 11:43:16,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:43:16,294 INFO L470 AbstractCegarLoop]: Abstraction has 6629 states and 8400 transitions. [2021-12-22 11:43:16,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.545454545454547) internal successors, (259), 11 states have internal predecessors, (259), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:16,294 INFO L276 IsEmpty]: Start isEmpty. Operand 6629 states and 8400 transitions. [2021-12-22 11:43:16,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2021-12-22 11:43:16,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:43:16,296 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 11:43:16,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-22 11:43:16,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:43:16,512 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:43:16,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:43:16,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1321811141, now seen corresponding path program 1 times [2021-12-22 11:43:16,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:43:16,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514239241] [2021-12-22 11:43:16,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:16,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:43:16,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:16,719 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 15 proven. 457 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 11:43:16,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:43:16,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514239241] [2021-12-22 11:43:16,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514239241] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:43:16,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924584302] [2021-12-22 11:43:16,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:16,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:43:16,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:43:16,721 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 11:43:16,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 11:43:16,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:16,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-22 11:43:16,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:43:17,827 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 15 proven. 457 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 11:43:17,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:43:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 15 proven. 457 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 11:43:18,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924584302] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:43:18,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:43:18,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2021-12-22 11:43:18,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270039667] [2021-12-22 11:43:18,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:43:18,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 11:43:18,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:43:18,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 11:43:18,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-12-22 11:43:18,703 INFO L87 Difference]: Start difference. First operand 6629 states and 8400 transitions. Second operand has 13 states, 13 states have (on average 27.53846153846154) internal successors, (358), 13 states have internal predecessors, (358), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:21,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:43:21,762 INFO L93 Difference]: Finished difference Result 29720 states and 37445 transitions. [2021-12-22 11:43:21,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-22 11:43:21,762 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 27.53846153846154) internal successors, (358), 13 states have internal predecessors, (358), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 366 [2021-12-22 11:43:21,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:43:21,795 INFO L225 Difference]: With dead ends: 29720 [2021-12-22 11:43:21,795 INFO L226 Difference]: Without dead ends: 23263 [2021-12-22 11:43:21,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 808 GetRequests, 749 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=315, Invalid=2655, Unknown=0, NotChecked=0, Total=2970 [2021-12-22 11:43:21,808 INFO L933 BasicCegarLoop]: 2115 mSDtfsCounter, 7681 mSDsluCounter, 18760 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7681 SdHoareTripleChecker+Valid, 20875 SdHoareTripleChecker+Invalid, 1691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 11:43:21,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7681 Valid, 20875 Invalid, 1691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1425 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 11:43:21,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23263 states. [2021-12-22 11:43:22,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23263 to 8042. [2021-12-22 11:43:22,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8042 states, 8036 states have (on average 1.2682926829268293) internal successors, (10192), 8040 states have internal predecessors, (10192), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:22,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8042 states to 8042 states and 10197 transitions. [2021-12-22 11:43:22,724 INFO L78 Accepts]: Start accepts. Automaton has 8042 states and 10197 transitions. Word has length 366 [2021-12-22 11:43:22,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:43:22,725 INFO L470 AbstractCegarLoop]: Abstraction has 8042 states and 10197 transitions. [2021-12-22 11:43:22,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 27.53846153846154) internal successors, (358), 13 states have internal predecessors, (358), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:22,725 INFO L276 IsEmpty]: Start isEmpty. Operand 8042 states and 10197 transitions. [2021-12-22 11:43:22,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2021-12-22 11:43:22,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:43:22,728 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-12-22 11:43:22,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 11:43:22,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:43:22,948 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:43:22,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:43:22,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1341756700, now seen corresponding path program 1 times [2021-12-22 11:43:22,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:43:22,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8270155] [2021-12-22 11:43:22,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:22,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:43:23,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:23,138 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 543 proven. 305 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 11:43:23,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:43:23,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8270155] [2021-12-22 11:43:23,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8270155] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:43:23,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701442867] [2021-12-22 11:43:23,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:23,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:43:23,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:43:23,164 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 11:43:23,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 11:43:23,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:23,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 1337 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 11:43:23,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:43:23,994 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 848 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 11:43:23,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 11:43:23,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701442867] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:43:23,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 11:43:23,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 13 [2021-12-22 11:43:23,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532041779] [2021-12-22 11:43:23,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:43:23,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 11:43:23,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:43:23,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 11:43:23,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-12-22 11:43:23,997 INFO L87 Difference]: Start difference. First operand 8042 states and 10197 transitions. Second operand has 11 states, 11 states have (on average 41.63636363636363) internal successors, (458), 11 states have internal predecessors, (458), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:25,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:43:25,389 INFO L93 Difference]: Finished difference Result 18581 states and 23478 transitions. [2021-12-22 11:43:25,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 11:43:25,390 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 41.63636363636363) internal successors, (458), 11 states have internal predecessors, (458), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 468 [2021-12-22 11:43:25,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:43:25,401 INFO L225 Difference]: With dead ends: 18581 [2021-12-22 11:43:25,401 INFO L226 Difference]: Without dead ends: 10708 [2021-12-22 11:43:25,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=452, Unknown=0, NotChecked=0, Total=650 [2021-12-22 11:43:25,409 INFO L933 BasicCegarLoop]: 1656 mSDtfsCounter, 2730 mSDsluCounter, 5148 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2730 SdHoareTripleChecker+Valid, 6804 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:43:25,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2730 Valid, 6804 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:43:25,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10708 states. [2021-12-22 11:43:26,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10708 to 7911. [2021-12-22 11:43:26,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7911 states, 7905 states have (on average 1.267046173308033) internal successors, (10016), 7909 states have internal predecessors, (10016), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:26,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7911 states to 7911 states and 10021 transitions. [2021-12-22 11:43:26,110 INFO L78 Accepts]: Start accepts. Automaton has 7911 states and 10021 transitions. Word has length 468 [2021-12-22 11:43:26,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:43:26,111 INFO L470 AbstractCegarLoop]: Abstraction has 7911 states and 10021 transitions. [2021-12-22 11:43:26,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 41.63636363636363) internal successors, (458), 11 states have internal predecessors, (458), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:26,112 INFO L276 IsEmpty]: Start isEmpty. Operand 7911 states and 10021 transitions. [2021-12-22 11:43:26,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2021-12-22 11:43:26,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:43:26,141 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 11:43:26,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 11:43:26,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-22 11:43:26,343 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:43:26,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:43:26,343 INFO L85 PathProgramCache]: Analyzing trace with hash 282578174, now seen corresponding path program 1 times [2021-12-22 11:43:26,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:43:26,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663768303] [2021-12-22 11:43:26,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:26,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:43:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 673 trivial. 0 not checked. [2021-12-22 11:43:26,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:43:26,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663768303] [2021-12-22 11:43:26,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663768303] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:43:26,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:43:26,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:43:26,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761364234] [2021-12-22 11:43:26,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:43:26,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:43:26,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:43:26,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:43:26,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:43:26,400 INFO L87 Difference]: Start difference. First operand 7911 states and 10021 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:26,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:43:26,653 INFO L93 Difference]: Finished difference Result 9564 states and 11908 transitions. [2021-12-22 11:43:26,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:43:26,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 469 [2021-12-22 11:43:26,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:43:26,656 INFO L225 Difference]: With dead ends: 9564 [2021-12-22 11:43:26,656 INFO L226 Difference]: Without dead ends: 1706 [2021-12-22 11:43:26,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:43:26,662 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 138 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:43:26,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 404 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:43:26,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2021-12-22 11:43:26,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1703. [2021-12-22 11:43:26,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1699 states have (on average 1.100058858151854) internal successors, (1869), 1701 states have internal predecessors, (1869), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:26,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 1872 transitions. [2021-12-22 11:43:26,823 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 1872 transitions. Word has length 469 [2021-12-22 11:43:26,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:43:26,824 INFO L470 AbstractCegarLoop]: Abstraction has 1703 states and 1872 transitions. [2021-12-22 11:43:26,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:26,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 1872 transitions. [2021-12-22 11:43:26,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2021-12-22 11:43:26,827 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:43:26,827 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:43:26,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-22 11:43:26,827 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:43:26,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:43:26,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1243077896, now seen corresponding path program 1 times [2021-12-22 11:43:26,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:43:26,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284488009] [2021-12-22 11:43:26,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:26,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:43:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 673 trivial. 0 not checked. [2021-12-22 11:43:26,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:43:26,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284488009] [2021-12-22 11:43:26,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284488009] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:43:26,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:43:26,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 11:43:26,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134331426] [2021-12-22 11:43:26,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:43:26,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 11:43:26,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:43:26,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 11:43:26,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:43:26,899 INFO L87 Difference]: Start difference. First operand 1703 states and 1872 transitions. Second operand has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:27,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:43:27,279 INFO L93 Difference]: Finished difference Result 3488 states and 3862 transitions. [2021-12-22 11:43:27,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 11:43:27,279 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 470 [2021-12-22 11:43:27,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:43:27,283 INFO L225 Difference]: With dead ends: 3488 [2021-12-22 11:43:27,283 INFO L226 Difference]: Without dead ends: 2771 [2021-12-22 11:43:27,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-12-22 11:43:27,285 INFO L933 BasicCegarLoop]: 503 mSDtfsCounter, 920 mSDsluCounter, 2011 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 2514 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:43:27,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [920 Valid, 2514 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:43:27,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2771 states. [2021-12-22 11:43:27,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2771 to 1697. [2021-12-22 11:43:27,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1693 states have (on average 1.0956881275841701) internal successors, (1855), 1695 states have internal predecessors, (1855), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:27,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 1858 transitions. [2021-12-22 11:43:27,456 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 1858 transitions. Word has length 470 [2021-12-22 11:43:27,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:43:27,457 INFO L470 AbstractCegarLoop]: Abstraction has 1697 states and 1858 transitions. [2021-12-22 11:43:27,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:27,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 1858 transitions. [2021-12-22 11:43:27,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2021-12-22 11:43:27,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:43:27,460 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 11:43:27,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-22 11:43:27,460 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:43:27,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:43:27,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1382591989, now seen corresponding path program 1 times [2021-12-22 11:43:27,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:43:27,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918633666] [2021-12-22 11:43:27,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:27,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:43:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 673 trivial. 0 not checked. [2021-12-22 11:43:27,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:43:27,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918633666] [2021-12-22 11:43:27,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918633666] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:43:27,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:43:27,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:43:27,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143051061] [2021-12-22 11:43:27,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:43:27,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:43:27,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:43:27,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:43:27,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:43:27,522 INFO L87 Difference]: Start difference. First operand 1697 states and 1858 transitions. Second operand has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:27,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:43:27,778 INFO L93 Difference]: Finished difference Result 2866 states and 3158 transitions. [2021-12-22 11:43:27,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 11:43:27,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 471 [2021-12-22 11:43:27,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:43:27,782 INFO L225 Difference]: With dead ends: 2866 [2021-12-22 11:43:27,782 INFO L226 Difference]: Without dead ends: 2147 [2021-12-22 11:43:27,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:43:27,783 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 448 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:43:27,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 937 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:43:27,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2147 states. [2021-12-22 11:43:27,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2147 to 1648. [2021-12-22 11:43:27,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1645 states have (on average 1.0693009118541033) internal successors, (1759), 1646 states have internal predecessors, (1759), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:27,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 1761 transitions. [2021-12-22 11:43:27,955 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 1761 transitions. Word has length 471 [2021-12-22 11:43:27,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:43:27,956 INFO L470 AbstractCegarLoop]: Abstraction has 1648 states and 1761 transitions. [2021-12-22 11:43:27,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:27,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 1761 transitions. [2021-12-22 11:43:27,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2021-12-22 11:43:27,959 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:43:27,959 INFO L514 BasicCegarLoop]: trace histogram [10, 8, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-12-22 11:43:27,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-22 11:43:27,959 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:43:27,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:43:27,960 INFO L85 PathProgramCache]: Analyzing trace with hash 281790686, now seen corresponding path program 1 times [2021-12-22 11:43:27,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:43:27,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927184160] [2021-12-22 11:43:27,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:27,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:43:27,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 94 proven. 316 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2021-12-22 11:43:28,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:43:28,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927184160] [2021-12-22 11:43:28,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927184160] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:43:28,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658298251] [2021-12-22 11:43:28,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:28,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:43:28,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:43:28,314 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 11:43:28,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 11:43:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:28,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 1474 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-22 11:43:28,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:43:29,577 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 96 proven. 263 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2021-12-22 11:43:29,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:43:30,305 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 25 proven. 334 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2021-12-22 11:43:30,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658298251] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:43:30,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:43:30,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 30 [2021-12-22 11:43:30,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529737566] [2021-12-22 11:43:30,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:43:30,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-22 11:43:30,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:43:30,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-22 11:43:30,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2021-12-22 11:43:30,307 INFO L87 Difference]: Start difference. First operand 1648 states and 1761 transitions. Second operand has 30 states, 30 states have (on average 13.9) internal successors, (417), 30 states have internal predecessors, (417), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:31,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:43:31,139 INFO L93 Difference]: Finished difference Result 1970 states and 2107 transitions. [2021-12-22 11:43:31,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-22 11:43:31,140 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 13.9) internal successors, (417), 30 states have internal predecessors, (417), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 528 [2021-12-22 11:43:31,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:43:31,142 INFO L225 Difference]: With dead ends: 1970 [2021-12-22 11:43:31,142 INFO L226 Difference]: Without dead ends: 1967 [2021-12-22 11:43:31,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1105 GetRequests, 1049 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=388, Invalid=2368, Unknown=0, NotChecked=0, Total=2756 [2021-12-22 11:43:31,144 INFO L933 BasicCegarLoop]: 397 mSDtfsCounter, 2213 mSDsluCounter, 8222 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2213 SdHoareTripleChecker+Valid, 8619 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 11:43:31,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2213 Valid, 8619 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 11:43:31,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-12-22 11:43:31,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1648. [2021-12-22 11:43:31,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1645 states have (on average 1.068693009118541) internal successors, (1758), 1646 states have internal predecessors, (1758), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:31,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 1760 transitions. [2021-12-22 11:43:31,361 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 1760 transitions. Word has length 528 [2021-12-22 11:43:31,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:43:31,361 INFO L470 AbstractCegarLoop]: Abstraction has 1648 states and 1760 transitions. [2021-12-22 11:43:31,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 13.9) internal successors, (417), 30 states have internal predecessors, (417), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:31,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 1760 transitions. [2021-12-22 11:43:31,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2021-12-22 11:43:31,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:43:31,365 INFO L514 BasicCegarLoop]: trace histogram [11, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:43:31,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 11:43:31,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-22 11:43:31,586 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:43:31,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:43:31,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1226769046, now seen corresponding path program 1 times [2021-12-22 11:43:31,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:43:31,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721174799] [2021-12-22 11:43:31,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:31,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:43:31,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:31,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 281 proven. 48 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2021-12-22 11:43:31,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:43:31,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721174799] [2021-12-22 11:43:31,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721174799] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:43:31,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841838306] [2021-12-22 11:43:31,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:31,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:43:31,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:43:31,739 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 11:43:31,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 11:43:31,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:31,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-22 11:43:31,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:43:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 281 proven. 48 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2021-12-22 11:43:32,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:43:33,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 281 proven. 48 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2021-12-22 11:43:33,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841838306] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:43:33,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:43:33,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2021-12-22 11:43:33,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757404066] [2021-12-22 11:43:33,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:43:33,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 11:43:33,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:43:33,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 11:43:33,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:43:33,238 INFO L87 Difference]: Start difference. First operand 1648 states and 1760 transitions. Second operand has 9 states, 9 states have (on average 31.22222222222222) internal successors, (281), 9 states have internal predecessors, (281), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:33,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:43:33,654 INFO L93 Difference]: Finished difference Result 2665 states and 2851 transitions. [2021-12-22 11:43:33,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 11:43:33,654 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 31.22222222222222) internal successors, (281), 9 states have internal predecessors, (281), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 577 [2021-12-22 11:43:33,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:43:33,657 INFO L225 Difference]: With dead ends: 2665 [2021-12-22 11:43:33,657 INFO L226 Difference]: Without dead ends: 2177 [2021-12-22 11:43:33,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1180 GetRequests, 1157 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-12-22 11:43:33,659 INFO L933 BasicCegarLoop]: 518 mSDtfsCounter, 1150 mSDsluCounter, 2905 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 3423 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:43:33,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1150 Valid, 3423 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:43:33,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2177 states. [2021-12-22 11:43:33,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2177 to 1644. [2021-12-22 11:43:33,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1641 states have (on average 1.0639853747714807) internal successors, (1746), 1642 states have internal predecessors, (1746), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:33,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 1748 transitions. [2021-12-22 11:43:33,843 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 1748 transitions. Word has length 577 [2021-12-22 11:43:33,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:43:33,844 INFO L470 AbstractCegarLoop]: Abstraction has 1644 states and 1748 transitions. [2021-12-22 11:43:33,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 31.22222222222222) internal successors, (281), 9 states have internal predecessors, (281), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:33,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 1748 transitions. [2021-12-22 11:43:33,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 637 [2021-12-22 11:43:33,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:43:33,848 INFO L514 BasicCegarLoop]: trace histogram [12, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 11:43:33,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 11:43:34,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-22 11:43:34,068 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:43:34,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:43:34,068 INFO L85 PathProgramCache]: Analyzing trace with hash 381551868, now seen corresponding path program 1 times [2021-12-22 11:43:34,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:43:34,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173114055] [2021-12-22 11:43:34,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:34,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:43:34,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 179 proven. 793 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2021-12-22 11:43:34,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:43:34,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173114055] [2021-12-22 11:43:34,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173114055] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:43:34,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50821345] [2021-12-22 11:43:34,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:34,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:43:34,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:43:34,496 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 11:43:34,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 11:43:34,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:34,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 1743 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-22 11:43:34,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:43:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 243 proven. 693 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-12-22 11:43:35,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:43:36,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 30 proven. 906 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-12-22 11:43:36,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50821345] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:43:36,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:43:36,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 34 [2021-12-22 11:43:36,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578053951] [2021-12-22 11:43:36,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:43:36,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-22 11:43:36,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:43:36,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-22 11:43:36,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1034, Unknown=0, NotChecked=0, Total=1122 [2021-12-22 11:43:36,684 INFO L87 Difference]: Start difference. First operand 1644 states and 1748 transitions. Second operand has 34 states, 34 states have (on average 20.794117647058822) internal successors, (707), 34 states have internal predecessors, (707), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:37,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:43:37,636 INFO L93 Difference]: Finished difference Result 1897 states and 2018 transitions. [2021-12-22 11:43:37,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-22 11:43:37,637 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 20.794117647058822) internal successors, (707), 34 states have internal predecessors, (707), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 636 [2021-12-22 11:43:37,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:43:37,639 INFO L225 Difference]: With dead ends: 1897 [2021-12-22 11:43:37,639 INFO L226 Difference]: Without dead ends: 1894 [2021-12-22 11:43:37,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1335 GetRequests, 1269 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=447, Invalid=3585, Unknown=0, NotChecked=0, Total=4032 [2021-12-22 11:43:37,640 INFO L933 BasicCegarLoop]: 636 mSDtfsCounter, 2810 mSDsluCounter, 13055 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2810 SdHoareTripleChecker+Valid, 13691 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 11:43:37,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2810 Valid, 13691 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 11:43:37,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-12-22 11:43:37,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1644. [2021-12-22 11:43:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1641 states have (on average 1.0633759902498476) internal successors, (1745), 1642 states have internal predecessors, (1745), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:37,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 1747 transitions. [2021-12-22 11:43:37,828 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 1747 transitions. Word has length 636 [2021-12-22 11:43:37,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:43:37,829 INFO L470 AbstractCegarLoop]: Abstraction has 1644 states and 1747 transitions. [2021-12-22 11:43:37,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 20.794117647058822) internal successors, (707), 34 states have internal predecessors, (707), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:37,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 1747 transitions. [2021-12-22 11:43:37,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2021-12-22 11:43:37,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:43:37,834 INFO L514 BasicCegarLoop]: trace histogram [13, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:43:37,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 11:43:38,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-22 11:43:38,052 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:43:38,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:43:38,052 INFO L85 PathProgramCache]: Analyzing trace with hash 37600824, now seen corresponding path program 1 times [2021-12-22 11:43:38,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:43:38,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218174786] [2021-12-22 11:43:38,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:38,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:43:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:38,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 474 proven. 212 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2021-12-22 11:43:38,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:43:38,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218174786] [2021-12-22 11:43:38,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218174786] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:43:38,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455526578] [2021-12-22 11:43:38,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:38,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:43:38,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:43:38,226 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 11:43:38,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 11:43:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:38,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 1871 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-22 11:43:38,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:43:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 474 proven. 212 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2021-12-22 11:43:39,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:43:40,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 474 proven. 212 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2021-12-22 11:43:40,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455526578] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:43:40,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:43:40,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2021-12-22 11:43:40,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105708378] [2021-12-22 11:43:40,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:43:40,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 11:43:40,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:43:40,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 11:43:40,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-22 11:43:40,418 INFO L87 Difference]: Start difference. First operand 1644 states and 1747 transitions. Second operand has 11 states, 11 states have (on average 35.18181818181818) internal successors, (387), 11 states have internal predecessors, (387), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:40,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:43:40,941 INFO L93 Difference]: Finished difference Result 2299 states and 2450 transitions. [2021-12-22 11:43:40,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 11:43:40,941 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 35.18181818181818) internal successors, (387), 11 states have internal predecessors, (387), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 685 [2021-12-22 11:43:40,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:43:40,944 INFO L225 Difference]: With dead ends: 2299 [2021-12-22 11:43:40,944 INFO L226 Difference]: Without dead ends: 2003 [2021-12-22 11:43:40,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1403 GetRequests, 1376 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-12-22 11:43:40,946 INFO L933 BasicCegarLoop]: 702 mSDtfsCounter, 1398 mSDsluCounter, 5083 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1398 SdHoareTripleChecker+Valid, 5785 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:43:40,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1398 Valid, 5785 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:43:40,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2021-12-22 11:43:41,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1642. [2021-12-22 11:43:41,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1639 states have (on average 1.0585723001830385) internal successors, (1735), 1640 states have internal predecessors, (1735), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:41,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 1737 transitions. [2021-12-22 11:43:41,164 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 1737 transitions. Word has length 685 [2021-12-22 11:43:41,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:43:41,164 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 1737 transitions. [2021-12-22 11:43:41,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 35.18181818181818) internal successors, (387), 11 states have internal predecessors, (387), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:41,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 1737 transitions. [2021-12-22 11:43:41,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 746 [2021-12-22 11:43:41,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:43:41,169 INFO L514 BasicCegarLoop]: trace histogram [14, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 11:43:41,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 11:43:41,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:43:41,387 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:43:41,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:43:41,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1036327175, now seen corresponding path program 1 times [2021-12-22 11:43:41,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:43:41,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73731814] [2021-12-22 11:43:41,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:41,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:43:41,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:41,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1606 backedges. 136 proven. 1408 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-22 11:43:41,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:43:41,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73731814] [2021-12-22 11:43:41,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73731814] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:43:41,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996559453] [2021-12-22 11:43:41,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:41,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:43:41,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:43:41,804 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 11:43:41,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 11:43:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:42,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 2013 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-22 11:43:42,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:43:44,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1606 backedges. 298 proven. 1228 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-22 11:43:44,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:43:45,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1606 backedges. 35 proven. 1491 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-22 11:43:45,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996559453] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:43:45,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:43:45,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 40 [2021-12-22 11:43:45,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205297463] [2021-12-22 11:43:45,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:43:45,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-22 11:43:45,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:43:45,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-22 11:43:45,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1454, Unknown=0, NotChecked=0, Total=1560 [2021-12-22 11:43:45,474 INFO L87 Difference]: Start difference. First operand 1642 states and 1737 transitions. Second operand has 40 states, 40 states have (on average 25.5) internal successors, (1020), 40 states have internal predecessors, (1020), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:46,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:43:46,588 INFO L93 Difference]: Finished difference Result 1905 states and 2017 transitions. [2021-12-22 11:43:46,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-22 11:43:46,589 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 25.5) internal successors, (1020), 40 states have internal predecessors, (1020), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 745 [2021-12-22 11:43:46,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:43:46,592 INFO L225 Difference]: With dead ends: 1905 [2021-12-22 11:43:46,593 INFO L226 Difference]: Without dead ends: 1902 [2021-12-22 11:43:46,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1566 GetRequests, 1488 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=510, Invalid=5040, Unknown=0, NotChecked=0, Total=5550 [2021-12-22 11:43:46,595 INFO L933 BasicCegarLoop]: 880 mSDtfsCounter, 3639 mSDsluCounter, 22165 mSDsCounter, 0 mSdLazyCounter, 1604 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3639 SdHoareTripleChecker+Valid, 23045 SdHoareTripleChecker+Invalid, 1655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 11:43:46,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3639 Valid, 23045 Invalid, 1655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1604 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 11:43:46,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2021-12-22 11:43:46,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 1642. [2021-12-22 11:43:46,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1639 states have (on average 1.0579621720561319) internal successors, (1734), 1640 states have internal predecessors, (1734), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:46,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 1736 transitions. [2021-12-22 11:43:46,820 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 1736 transitions. Word has length 745 [2021-12-22 11:43:46,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:43:46,820 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 1736 transitions. [2021-12-22 11:43:46,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 25.5) internal successors, (1020), 40 states have internal predecessors, (1020), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:46,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 1736 transitions. [2021-12-22 11:43:46,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 795 [2021-12-22 11:43:46,827 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:43:46,827 INFO L514 BasicCegarLoop]: trace histogram [15, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 11:43:46,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-22 11:43:47,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-22 11:43:47,048 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:43:47,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:43:47,048 INFO L85 PathProgramCache]: Analyzing trace with hash 502016475, now seen corresponding path program 1 times [2021-12-22 11:43:47,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:43:47,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583117887] [2021-12-22 11:43:47,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:47,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:43:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:47,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1845 backedges. 667 proven. 493 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2021-12-22 11:43:47,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:43:47,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583117887] [2021-12-22 11:43:47,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583117887] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:43:47,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930305946] [2021-12-22 11:43:47,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:47,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:43:47,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:43:47,300 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 11:43:47,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-22 11:43:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:47,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 2141 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-22 11:43:47,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:43:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1845 backedges. 667 proven. 493 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2021-12-22 11:43:48,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:43:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1845 backedges. 667 proven. 493 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2021-12-22 11:43:49,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930305946] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:43:49,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:43:49,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2021-12-22 11:43:49,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252167538] [2021-12-22 11:43:49,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:43:49,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 11:43:49,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:43:49,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 11:43:49,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-12-22 11:43:49,777 INFO L87 Difference]: Start difference. First operand 1642 states and 1736 transitions. Second operand has 13 states, 13 states have (on average 38.0) internal successors, (494), 13 states have internal predecessors, (494), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:50,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:43:50,327 INFO L93 Difference]: Finished difference Result 2012 states and 2135 transitions. [2021-12-22 11:43:50,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-22 11:43:50,327 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 38.0) internal successors, (494), 13 states have internal predecessors, (494), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 794 [2021-12-22 11:43:50,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:43:50,329 INFO L225 Difference]: With dead ends: 2012 [2021-12-22 11:43:50,329 INFO L226 Difference]: Without dead ends: 1908 [2021-12-22 11:43:50,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1626 GetRequests, 1596 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-12-22 11:43:50,331 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 1484 mSDsluCounter, 7529 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 8368 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:43:50,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1484 Valid, 8368 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:43:50,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2021-12-22 11:43:50,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1641. [2021-12-22 11:43:50,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1639 states have (on average 1.0530811470408785) internal successors, (1726), 1639 states have internal predecessors, (1726), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:50,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 1727 transitions. [2021-12-22 11:43:50,540 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 1727 transitions. Word has length 794 [2021-12-22 11:43:50,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:43:50,541 INFO L470 AbstractCegarLoop]: Abstraction has 1641 states and 1727 transitions. [2021-12-22 11:43:50,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 38.0) internal successors, (494), 13 states have internal predecessors, (494), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:50,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 1727 transitions. [2021-12-22 11:43:50,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 856 [2021-12-22 11:43:50,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:43:50,548 INFO L514 BasicCegarLoop]: trace histogram [16, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 11:43:50,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-22 11:43:50,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:43:50,762 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:43:50,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:43:50,763 INFO L85 PathProgramCache]: Analyzing trace with hash 720245394, now seen corresponding path program 1 times [2021-12-22 11:43:50,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:43:50,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901920398] [2021-12-22 11:43:50,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:50,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:43:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2149 backedges. 93 proven. 2031 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-22 11:43:51,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:43:51,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901920398] [2021-12-22 11:43:51,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901920398] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:43:51,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579247417] [2021-12-22 11:43:51,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:43:51,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:43:51,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:43:51,309 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 11:43:51,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-22 11:43:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:43:51,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 2284 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-22 11:43:51,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:43:54,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2149 backedges. 257 proven. 1867 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-22 11:43:54,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:43:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2149 backedges. 40 proven. 2084 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-22 11:43:55,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579247417] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:43:55,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:43:55,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 46 [2021-12-22 11:43:55,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519557679] [2021-12-22 11:43:55,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:43:55,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-22 11:43:55,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:43:55,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-22 11:43:55,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1946, Unknown=0, NotChecked=0, Total=2070 [2021-12-22 11:43:55,234 INFO L87 Difference]: Start difference. First operand 1641 states and 1727 transitions. Second operand has 46 states, 46 states have (on average 28.065217391304348) internal successors, (1291), 46 states have internal predecessors, (1291), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:56,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:43:56,882 INFO L93 Difference]: Finished difference Result 1908 states and 2012 transitions. [2021-12-22 11:43:56,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-22 11:43:56,882 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 28.065217391304348) internal successors, (1291), 46 states have internal predecessors, (1291), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 855 [2021-12-22 11:43:56,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:43:56,883 INFO L225 Difference]: With dead ends: 1908 [2021-12-22 11:43:56,883 INFO L226 Difference]: Without dead ends: 0 [2021-12-22 11:43:56,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1811 GetRequests, 1715 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2010 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=693, Invalid=7863, Unknown=0, NotChecked=0, Total=8556 [2021-12-22 11:43:56,886 INFO L933 BasicCegarLoop]: 1051 mSDtfsCounter, 4269 mSDsluCounter, 29311 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4269 SdHoareTripleChecker+Valid, 30362 SdHoareTripleChecker+Invalid, 2136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 11:43:56,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4269 Valid, 30362 Invalid, 2136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2057 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 11:43:56,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-22 11:43:56,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-22 11:43:56,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:56,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-22 11:43:56,887 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 855 [2021-12-22 11:43:56,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:43:56,887 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-22 11:43:56,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 28.065217391304348) internal successors, (1291), 46 states have internal predecessors, (1291), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:43:56,888 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-22 11:43:56,888 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-22 11:43:56,890 INFO L764 garLoopResultBuilder]: Registering result SAFE for location errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-22 11:43:56,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-22 11:43:57,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:43:57,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.