./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.BOUNDED-8.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.BOUNDED-8.pals.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5d3b64744a19af136ca9c439b2264a15465f658e2e3d4a576a98d96e4b8aff92 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 14:59:50,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 14:59:50,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 14:59:51,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 14:59:51,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 14:59:51,004 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 14:59:51,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 14:59:51,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 14:59:51,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 14:59:51,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 14:59:51,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 14:59:51,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 14:59:51,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 14:59:51,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 14:59:51,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 14:59:51,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 14:59:51,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 14:59:51,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 14:59:51,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 14:59:51,050 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 14:59:51,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 14:59:51,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 14:59:51,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 14:59:51,055 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 14:59:51,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 14:59:51,057 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 14:59:51,058 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 14:59:51,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 14:59:51,059 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 14:59:51,060 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 14:59:51,061 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 14:59:51,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 14:59:51,062 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 14:59:51,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 14:59:51,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 14:59:51,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 14:59:51,078 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 14:59:51,078 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 14:59:51,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 14:59:51,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 14:59:51,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 14:59:51,080 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 14:59:51,102 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 14:59:51,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 14:59:51,103 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 14:59:51,103 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 14:59:51,103 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 14:59:51,104 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 14:59:51,104 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 14:59:51,104 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 14:59:51,104 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 14:59:51,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 14:59:51,105 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 14:59:51,106 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 14:59:51,106 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 14:59:51,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 14:59:51,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 14:59:51,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 14:59:51,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 14:59:51,107 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 14:59:51,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 14:59:51,107 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 14:59:51,107 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 14:59:51,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 14:59:51,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 14:59:51,108 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 14:59:51,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:59:51,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 14:59:51,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 14:59:51,109 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 14:59:51,109 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 14:59:51,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 14:59:51,109 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 14:59:51,110 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 14:59:51,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 14:59:51,110 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 14:59:51,110 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5d3b64744a19af136ca9c439b2264a15465f658e2e3d4a576a98d96e4b8aff92 [2021-12-14 14:59:51,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 14:59:51,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 14:59:51,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 14:59:51,345 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 14:59:51,345 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 14:59:51,346 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.BOUNDED-8.pals.c [2021-12-14 14:59:51,397 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bee99e7c2/1d1449ac101f48f58de9f69e36180021/FLAG459377c40 [2021-12-14 14:59:51,757 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 14:59:51,758 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.BOUNDED-8.pals.c [2021-12-14 14:59:51,775 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bee99e7c2/1d1449ac101f48f58de9f69e36180021/FLAG459377c40 [2021-12-14 14:59:51,787 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bee99e7c2/1d1449ac101f48f58de9f69e36180021 [2021-12-14 14:59:51,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 14:59:51,791 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 14:59:51,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 14:59:51,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 14:59:51,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 14:59:51,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:59:51" (1/1) ... [2021-12-14 14:59:51,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b312920 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:59:51, skipping insertion in model container [2021-12-14 14:59:51,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:59:51" (1/1) ... [2021-12-14 14:59:51,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 14:59:51,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 14:59:52,006 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.BOUNDED-8.pals.c[8246,8259] [2021-12-14 14:59:52,013 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:59:52,019 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 14:59:52,054 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.BOUNDED-8.pals.c[8246,8259] [2021-12-14 14:59:52,055 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:59:52,064 INFO L208 MainTranslator]: Completed translation [2021-12-14 14:59:52,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:59:52 WrapperNode [2021-12-14 14:59:52,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 14:59:52,066 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 14:59:52,066 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 14:59:52,066 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 14:59:52,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:59:52" (1/1) ... [2021-12-14 14:59:52,077 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:59:52" (1/1) ... [2021-12-14 14:59:52,094 INFO L137 Inliner]: procedures = 22, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 275 [2021-12-14 14:59:52,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 14:59:52,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 14:59:52,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 14:59:52,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 14:59:52,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:59:52" (1/1) ... [2021-12-14 14:59:52,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:59:52" (1/1) ... [2021-12-14 14:59:52,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:59:52" (1/1) ... [2021-12-14 14:59:52,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:59:52" (1/1) ... [2021-12-14 14:59:52,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:59:52" (1/1) ... [2021-12-14 14:59:52,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:59:52" (1/1) ... [2021-12-14 14:59:52,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:59:52" (1/1) ... [2021-12-14 14:59:52,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 14:59:52,144 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 14:59:52,144 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 14:59:52,144 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 14:59:52,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:59:52" (1/1) ... [2021-12-14 14:59:52,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:59:52,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:59:52,182 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) [2021-12-14 14:59:52,187 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 [2021-12-14 14:59:52,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 14:59:52,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 14:59:52,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 14:59:52,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 14:59:52,343 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 14:59:52,344 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 14:59:52,617 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 14:59:52,629 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 14:59:52,630 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 14:59:52,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:59:52 BoogieIcfgContainer [2021-12-14 14:59:52,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 14:59:52,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 14:59:52,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 14:59:52,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 14:59:52,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:59:51" (1/3) ... [2021-12-14 14:59:52,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d12c376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:59:52, skipping insertion in model container [2021-12-14 14:59:52,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:59:52" (2/3) ... [2021-12-14 14:59:52,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d12c376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:59:52, skipping insertion in model container [2021-12-14 14:59:52,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:59:52" (3/3) ... [2021-12-14 14:59:52,653 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals.c [2021-12-14 14:59:52,657 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 14:59:52,657 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 14:59:52,698 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 14:59:52,706 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 [2021-12-14 14:59:52,706 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 14:59:52,725 INFO L276 IsEmpty]: Start isEmpty. Operand has 77 states, 75 states have (on average 1.7066666666666668) internal successors, (128), 76 states have internal predecessors, (128), 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) [2021-12-14 14:59:52,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-14 14:59:52,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:59:52,732 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] [2021-12-14 14:59:52,733 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:59:52,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:59:52,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1837107710, now seen corresponding path program 1 times [2021-12-14 14:59:52,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:59:52,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633513597] [2021-12-14 14:59:52,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:52,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:59:52,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:52,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:59:52,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:59:52,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633513597] [2021-12-14 14:59:52,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633513597] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:59:52,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:59:52,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 14:59:52,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618149523] [2021-12-14 14:59:52,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:59:52,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 14:59:52,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:59:52,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 14:59:52,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 14:59:52,923 INFO L87 Difference]: Start difference. First operand has 77 states, 75 states have (on average 1.7066666666666668) internal successors, (128), 76 states have internal predecessors, (128), 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) Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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) [2021-12-14 14:59:52,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:59:52,945 INFO L93 Difference]: Finished difference Result 126 states and 204 transitions. [2021-12-14 14:59:52,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 14:59:52,947 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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) Word has length 29 [2021-12-14 14:59:52,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:59:52,954 INFO L225 Difference]: With dead ends: 126 [2021-12-14 14:59:52,955 INFO L226 Difference]: Without dead ends: 73 [2021-12-14 14:59:52,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 14:59:52,960 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:59:52,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:59:52,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-14 14:59:52,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-12-14 14:59:52,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.6805555555555556) internal successors, (121), 72 states have internal predecessors, (121), 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) [2021-12-14 14:59:52,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 121 transitions. [2021-12-14 14:59:52,989 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 121 transitions. Word has length 29 [2021-12-14 14:59:52,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:59:52,989 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 121 transitions. [2021-12-14 14:59:52,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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) [2021-12-14 14:59:52,990 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 121 transitions. [2021-12-14 14:59:52,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-14 14:59:52,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:59:52,991 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] [2021-12-14 14:59:52,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 14:59:52,991 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:59:52,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:59:52,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1971121216, now seen corresponding path program 1 times [2021-12-14 14:59:52,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:59:52,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588092011] [2021-12-14 14:59:52,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:52,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:59:53,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:53,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:59:53,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:59:53,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588092011] [2021-12-14 14:59:53,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588092011] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:59:53,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:59:53,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 14:59:53,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048884590] [2021-12-14 14:59:53,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:59:53,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:59:53,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:59:53,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:59:53,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:59:53,053 INFO L87 Difference]: Start difference. First operand 73 states and 121 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2021-12-14 14:59:53,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:59:53,114 INFO L93 Difference]: Finished difference Result 165 states and 263 transitions. [2021-12-14 14:59:53,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 14:59:53,115 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) Word has length 29 [2021-12-14 14:59:53,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:59:53,116 INFO L225 Difference]: With dead ends: 165 [2021-12-14 14:59:53,116 INFO L226 Difference]: Without dead ends: 117 [2021-12-14 14:59:53,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:59:53,118 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 71 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:59:53,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 440 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:59:53,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-14 14:59:53,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 73. [2021-12-14 14:59:53,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3611111111111112) internal successors, (98), 72 states have internal predecessors, (98), 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) [2021-12-14 14:59:53,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2021-12-14 14:59:53,129 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 29 [2021-12-14 14:59:53,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:59:53,130 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2021-12-14 14:59:53,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2021-12-14 14:59:53,130 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2021-12-14 14:59:53,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-14 14:59:53,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:59:53,131 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] [2021-12-14 14:59:53,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 14:59:53,131 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:59:53,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:59:53,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1333293339, now seen corresponding path program 1 times [2021-12-14 14:59:53,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:59:53,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278109440] [2021-12-14 14:59:53,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:53,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:59:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:59:53,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:59:53,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278109440] [2021-12-14 14:59:53,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278109440] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:59:53,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:59:53,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:59:53,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617142511] [2021-12-14 14:59:53,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:59:53,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:59:53,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:59:53,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:59:53,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:59:53,186 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2021-12-14 14:59:53,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:59:53,200 INFO L93 Difference]: Finished difference Result 155 states and 226 transitions. [2021-12-14 14:59:53,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:59:53,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) Word has length 51 [2021-12-14 14:59:53,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:59:53,201 INFO L225 Difference]: With dead ends: 155 [2021-12-14 14:59:53,201 INFO L226 Difference]: Without dead ends: 111 [2021-12-14 14:59:53,202 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 [2021-12-14 14:59:53,203 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 59 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:59:53,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 220 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:59:53,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-14 14:59:53,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2021-12-14 14:59:53,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.4351851851851851) internal successors, (155), 108 states have internal predecessors, (155), 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) [2021-12-14 14:59:53,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 155 transitions. [2021-12-14 14:59:53,210 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 155 transitions. Word has length 51 [2021-12-14 14:59:53,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:59:53,211 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 155 transitions. [2021-12-14 14:59:53,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2021-12-14 14:59:53,211 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 155 transitions. [2021-12-14 14:59:53,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-14 14:59:53,212 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:59:53,212 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] [2021-12-14 14:59:53,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 14:59:53,212 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:59:53,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:59:53,213 INFO L85 PathProgramCache]: Analyzing trace with hash -606737519, now seen corresponding path program 1 times [2021-12-14 14:59:53,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:59:53,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664792354] [2021-12-14 14:59:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:53,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:59:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:59:53,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:59:53,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664792354] [2021-12-14 14:59:53,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664792354] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:59:53,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:59:53,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:59:53,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558936864] [2021-12-14 14:59:53,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:59:53,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:59:53,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:59:53,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:59:53,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:59:53,260 INFO L87 Difference]: Start difference. First operand 109 states and 155 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2021-12-14 14:59:53,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:59:53,276 INFO L93 Difference]: Finished difference Result 257 states and 387 transitions. [2021-12-14 14:59:53,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:59:53,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) Word has length 51 [2021-12-14 14:59:53,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:59:53,278 INFO L225 Difference]: With dead ends: 257 [2021-12-14 14:59:53,279 INFO L226 Difference]: Without dead ends: 177 [2021-12-14 14:59:53,279 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 [2021-12-14 14:59:53,280 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 55 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:59:53,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 219 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:59:53,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-14 14:59:53,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2021-12-14 14:59:53,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 174 states have internal predecessors, (258), 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) [2021-12-14 14:59:53,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 258 transitions. [2021-12-14 14:59:53,292 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 258 transitions. Word has length 51 [2021-12-14 14:59:53,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:59:53,292 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 258 transitions. [2021-12-14 14:59:53,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2021-12-14 14:59:53,293 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 258 transitions. [2021-12-14 14:59:53,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-14 14:59:53,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:59:53,294 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] [2021-12-14 14:59:53,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 14:59:53,294 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:59:53,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:59:53,295 INFO L85 PathProgramCache]: Analyzing trace with hash 2093945095, now seen corresponding path program 1 times [2021-12-14 14:59:53,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:59:53,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30167599] [2021-12-14 14:59:53,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:53,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:59:53,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:59:53,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:59:53,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30167599] [2021-12-14 14:59:53,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30167599] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:59:53,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:59:53,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:59:53,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029468635] [2021-12-14 14:59:53,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:59:53,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:59:53,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:59:53,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:59:53,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:59:53,339 INFO L87 Difference]: Start difference. First operand 175 states and 258 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2021-12-14 14:59:53,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:59:53,358 INFO L93 Difference]: Finished difference Result 443 states and 676 transitions. [2021-12-14 14:59:53,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:59:53,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) Word has length 51 [2021-12-14 14:59:53,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:59:53,361 INFO L225 Difference]: With dead ends: 443 [2021-12-14 14:59:53,361 INFO L226 Difference]: Without dead ends: 297 [2021-12-14 14:59:53,362 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 [2021-12-14 14:59:53,362 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 51 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:59:53,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 218 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:59:53,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-12-14 14:59:53,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 295. [2021-12-14 14:59:53,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.5034013605442176) internal successors, (442), 294 states have internal predecessors, (442), 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) [2021-12-14 14:59:53,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 442 transitions. [2021-12-14 14:59:53,378 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 442 transitions. Word has length 51 [2021-12-14 14:59:53,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:59:53,378 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 442 transitions. [2021-12-14 14:59:53,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2021-12-14 14:59:53,379 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 442 transitions. [2021-12-14 14:59:53,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-14 14:59:53,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:59:53,380 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] [2021-12-14 14:59:53,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 14:59:53,380 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:59:53,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:59:53,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1863229059, now seen corresponding path program 1 times [2021-12-14 14:59:53,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:59:53,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188303057] [2021-12-14 14:59:53,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:53,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:59:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:59:53,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:59:53,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188303057] [2021-12-14 14:59:53,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188303057] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:59:53,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:59:53,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:59:53,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961864378] [2021-12-14 14:59:53,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:59:53,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:59:53,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:59:53,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:59:53,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:59:53,417 INFO L87 Difference]: Start difference. First operand 295 states and 442 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2021-12-14 14:59:53,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:59:53,439 INFO L93 Difference]: Finished difference Result 779 states and 1188 transitions. [2021-12-14 14:59:53,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:59:53,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) Word has length 51 [2021-12-14 14:59:53,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:59:53,441 INFO L225 Difference]: With dead ends: 779 [2021-12-14 14:59:53,441 INFO L226 Difference]: Without dead ends: 513 [2021-12-14 14:59:53,442 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 [2021-12-14 14:59:53,443 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 47 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:59:53,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 217 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:59:53,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-12-14 14:59:53,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 511. [2021-12-14 14:59:53,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 1.5019607843137255) internal successors, (766), 510 states have internal predecessors, (766), 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) [2021-12-14 14:59:53,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 766 transitions. [2021-12-14 14:59:53,464 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 766 transitions. Word has length 51 [2021-12-14 14:59:53,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:59:53,465 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 766 transitions. [2021-12-14 14:59:53,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2021-12-14 14:59:53,465 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 766 transitions. [2021-12-14 14:59:53,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-14 14:59:53,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:59:53,466 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] [2021-12-14 14:59:53,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 14:59:53,466 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:59:53,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:59:53,467 INFO L85 PathProgramCache]: Analyzing trace with hash -645243661, now seen corresponding path program 1 times [2021-12-14 14:59:53,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:59:53,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719434670] [2021-12-14 14:59:53,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:53,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:59:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:53,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:59:53,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:59:53,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719434670] [2021-12-14 14:59:53,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719434670] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:59:53,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:59:53,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 14:59:53,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149507888] [2021-12-14 14:59:53,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:59:53,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 14:59:53,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:59:53,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 14:59:53,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:59:53,531 INFO L87 Difference]: Start difference. First operand 511 states and 766 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2021-12-14 14:59:53,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:59:53,718 INFO L93 Difference]: Finished difference Result 4367 states and 6662 transitions. [2021-12-14 14:59:53,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 14:59:53,719 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) Word has length 51 [2021-12-14 14:59:53,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:59:53,731 INFO L225 Difference]: With dead ends: 4367 [2021-12-14 14:59:53,731 INFO L226 Difference]: Without dead ends: 3885 [2021-12-14 14:59:53,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-14 14:59:53,737 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 765 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:59:53,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 629 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:59:53,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3885 states. [2021-12-14 14:59:53,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3885 to 991. [2021-12-14 14:59:53,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 1.4848484848484849) internal successors, (1470), 990 states have internal predecessors, (1470), 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) [2021-12-14 14:59:53,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1470 transitions. [2021-12-14 14:59:53,806 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1470 transitions. Word has length 51 [2021-12-14 14:59:53,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:59:53,813 INFO L470 AbstractCegarLoop]: Abstraction has 991 states and 1470 transitions. [2021-12-14 14:59:53,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2021-12-14 14:59:53,813 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1470 transitions. [2021-12-14 14:59:53,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-14 14:59:53,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:59:53,817 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] [2021-12-14 14:59:53,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 14:59:53,817 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:59:53,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:59:53,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1275401347, now seen corresponding path program 1 times [2021-12-14 14:59:53,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:59:53,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580139406] [2021-12-14 14:59:53,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:53,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:59:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:59:53,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:59:53,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580139406] [2021-12-14 14:59:53,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580139406] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:59:53,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:59:53,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:59:53,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819583400] [2021-12-14 14:59:53,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:59:53,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:59:53,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:59:53,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:59:53,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:59:53,848 INFO L87 Difference]: Start difference. First operand 991 states and 1470 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-12-14 14:59:53,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:59:53,890 INFO L93 Difference]: Finished difference Result 2397 states and 3570 transitions. [2021-12-14 14:59:53,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:59:53,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) Word has length 53 [2021-12-14 14:59:53,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:59:53,895 INFO L225 Difference]: With dead ends: 2397 [2021-12-14 14:59:53,895 INFO L226 Difference]: Without dead ends: 1435 [2021-12-14 14:59:53,896 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 [2021-12-14 14:59:53,898 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 39 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:59:53,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 184 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:59:53,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2021-12-14 14:59:53,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1433. [2021-12-14 14:59:53,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 1.4692737430167597) internal successors, (2104), 1432 states have internal predecessors, (2104), 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) [2021-12-14 14:59:53,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 2104 transitions. [2021-12-14 14:59:53,973 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 2104 transitions. Word has length 53 [2021-12-14 14:59:53,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:59:53,973 INFO L470 AbstractCegarLoop]: Abstraction has 1433 states and 2104 transitions. [2021-12-14 14:59:53,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-12-14 14:59:53,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 2104 transitions. [2021-12-14 14:59:53,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-14 14:59:53,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:59:53,974 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] [2021-12-14 14:59:53,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 14:59:53,975 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:59:53,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:59:53,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1341894859, now seen corresponding path program 1 times [2021-12-14 14:59:53,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:59:53,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963896011] [2021-12-14 14:59:53,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:53,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:59:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:59:54,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:59:54,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963896011] [2021-12-14 14:59:54,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963896011] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:59:54,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:59:54,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 14:59:54,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064021633] [2021-12-14 14:59:54,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:59:54,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 14:59:54,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:59:54,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 14:59:54,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:59:54,069 INFO L87 Difference]: Start difference. First operand 1433 states and 2104 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2021-12-14 14:59:54,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:59:54,164 INFO L93 Difference]: Finished difference Result 2837 states and 4178 transitions. [2021-12-14 14:59:54,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 14:59:54,165 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) Word has length 53 [2021-12-14 14:59:54,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:59:54,169 INFO L225 Difference]: With dead ends: 2837 [2021-12-14 14:59:54,169 INFO L226 Difference]: Without dead ends: 1435 [2021-12-14 14:59:54,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:59:54,171 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 280 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:59:54,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 287 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:59:54,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2021-12-14 14:59:54,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1433. [2021-12-14 14:59:54,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 1.452513966480447) internal successors, (2080), 1432 states have internal predecessors, (2080), 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) [2021-12-14 14:59:54,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 2080 transitions. [2021-12-14 14:59:54,211 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 2080 transitions. Word has length 53 [2021-12-14 14:59:54,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:59:54,211 INFO L470 AbstractCegarLoop]: Abstraction has 1433 states and 2080 transitions. [2021-12-14 14:59:54,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2021-12-14 14:59:54,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 2080 transitions. [2021-12-14 14:59:54,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-14 14:59:54,212 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:59:54,212 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] [2021-12-14 14:59:54,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 14:59:54,213 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:59:54,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:59:54,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1765655459, now seen corresponding path program 1 times [2021-12-14 14:59:54,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:59:54,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052787948] [2021-12-14 14:59:54,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:54,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:59:54,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:54,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:59:54,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:59:54,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052787948] [2021-12-14 14:59:54,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052787948] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:59:54,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:59:54,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 14:59:54,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570177787] [2021-12-14 14:59:54,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:59:54,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 14:59:54,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:59:54,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 14:59:54,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:59:54,282 INFO L87 Difference]: Start difference. First operand 1433 states and 2080 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 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) [2021-12-14 14:59:54,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:59:54,423 INFO L93 Difference]: Finished difference Result 2664 states and 3817 transitions. [2021-12-14 14:59:54,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 14:59:54,424 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 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) Word has length 54 [2021-12-14 14:59:54,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:59:54,431 INFO L225 Difference]: With dead ends: 2664 [2021-12-14 14:59:54,431 INFO L226 Difference]: Without dead ends: 2662 [2021-12-14 14:59:54,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-12-14 14:59:54,434 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 412 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:59:54,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 554 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:59:54,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2662 states. [2021-12-14 14:59:54,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2662 to 1529. [2021-12-14 14:59:54,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 1.418848167539267) internal successors, (2168), 1528 states have internal predecessors, (2168), 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) [2021-12-14 14:59:54,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 2168 transitions. [2021-12-14 14:59:54,518 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 2168 transitions. Word has length 54 [2021-12-14 14:59:54,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:59:54,518 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 2168 transitions. [2021-12-14 14:59:54,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 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) [2021-12-14 14:59:54,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 2168 transitions. [2021-12-14 14:59:54,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-14 14:59:54,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:59:54,522 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] [2021-12-14 14:59:54,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 14:59:54,522 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:59:54,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:59:54,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1473223963, now seen corresponding path program 1 times [2021-12-14 14:59:54,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:59:54,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020636304] [2021-12-14 14:59:54,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:54,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:59:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:54,583 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 14:59:54,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:59:54,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020636304] [2021-12-14 14:59:54,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020636304] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:59:54,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:59:54,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 14:59:54,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875487676] [2021-12-14 14:59:54,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:59:54,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 14:59:54,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:59:54,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 14:59:54,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:59:54,586 INFO L87 Difference]: Start difference. First operand 1529 states and 2168 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 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) [2021-12-14 14:59:54,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:59:54,870 INFO L93 Difference]: Finished difference Result 7835 states and 11137 transitions. [2021-12-14 14:59:54,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 14:59:54,870 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 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) Word has length 78 [2021-12-14 14:59:54,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:59:54,887 INFO L225 Difference]: With dead ends: 7835 [2021-12-14 14:59:54,887 INFO L226 Difference]: Without dead ends: 6337 [2021-12-14 14:59:54,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 14:59:54,890 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 447 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:59:54,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 465 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:59:54,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6337 states. [2021-12-14 14:59:55,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6337 to 3025. [2021-12-14 14:59:55,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3025 states, 3024 states have (on average 1.4153439153439153) internal successors, (4280), 3024 states have internal predecessors, (4280), 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) [2021-12-14 14:59:55,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 4280 transitions. [2021-12-14 14:59:55,021 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 4280 transitions. Word has length 78 [2021-12-14 14:59:55,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:59:55,021 INFO L470 AbstractCegarLoop]: Abstraction has 3025 states and 4280 transitions. [2021-12-14 14:59:55,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 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) [2021-12-14 14:59:55,022 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 4280 transitions. [2021-12-14 14:59:55,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-14 14:59:55,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:59:55,023 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] [2021-12-14 14:59:55,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 14:59:55,023 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:59:55,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:59:55,023 INFO L85 PathProgramCache]: Analyzing trace with hash -295558853, now seen corresponding path program 1 times [2021-12-14 14:59:55,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:59:55,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758680765] [2021-12-14 14:59:55,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:55,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:59:55,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:55,064 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 14:59:55,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:59:55,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758680765] [2021-12-14 14:59:55,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758680765] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:59:55,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:59:55,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 14:59:55,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395780101] [2021-12-14 14:59:55,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:59:55,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 14:59:55,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:59:55,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 14:59:55,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:59:55,066 INFO L87 Difference]: Start difference. First operand 3025 states and 4280 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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) [2021-12-14 14:59:55,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:59:55,329 INFO L93 Difference]: Finished difference Result 9331 states and 13249 transitions. [2021-12-14 14:59:55,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 14:59:55,329 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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) Word has length 78 [2021-12-14 14:59:55,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:59:55,351 INFO L225 Difference]: With dead ends: 9331 [2021-12-14 14:59:55,352 INFO L226 Difference]: Without dead ends: 7833 [2021-12-14 14:59:55,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 14:59:55,356 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 403 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:59:55,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 502 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:59:55,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7833 states. [2021-12-14 14:59:55,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7833 to 5273. [2021-12-14 14:59:55,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5273 states, 5272 states have (on average 1.4089529590288317) internal successors, (7428), 5272 states have internal predecessors, (7428), 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) [2021-12-14 14:59:55,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5273 states to 5273 states and 7428 transitions. [2021-12-14 14:59:55,607 INFO L78 Accepts]: Start accepts. Automaton has 5273 states and 7428 transitions. Word has length 78 [2021-12-14 14:59:55,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:59:55,608 INFO L470 AbstractCegarLoop]: Abstraction has 5273 states and 7428 transitions. [2021-12-14 14:59:55,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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) [2021-12-14 14:59:55,608 INFO L276 IsEmpty]: Start isEmpty. Operand 5273 states and 7428 transitions. [2021-12-14 14:59:55,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-14 14:59:55,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:59:55,610 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] [2021-12-14 14:59:55,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 14:59:55,610 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:59:55,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:59:55,611 INFO L85 PathProgramCache]: Analyzing trace with hash 836080987, now seen corresponding path program 1 times [2021-12-14 14:59:55,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:59:55,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308350249] [2021-12-14 14:59:55,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:55,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:59:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:55,673 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 14:59:55,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:59:55,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308350249] [2021-12-14 14:59:55,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308350249] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:59:55,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:59:55,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 14:59:55,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769289291] [2021-12-14 14:59:55,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:59:55,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 14:59:55,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:59:55,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 14:59:55,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:59:55,675 INFO L87 Difference]: Start difference. First operand 5273 states and 7428 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 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) [2021-12-14 14:59:56,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:59:56,027 INFO L93 Difference]: Finished difference Result 10827 states and 15361 transitions. [2021-12-14 14:59:56,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 14:59:56,027 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 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) Word has length 78 [2021-12-14 14:59:56,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:59:56,044 INFO L225 Difference]: With dead ends: 10827 [2021-12-14 14:59:56,044 INFO L226 Difference]: Without dead ends: 9329 [2021-12-14 14:59:56,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 14:59:56,051 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 436 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:59:56,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 519 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:59:56,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9329 states. [2021-12-14 14:59:56,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9329 to 6769. [2021-12-14 14:59:56,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6769 states, 6768 states have (on average 1.4095744680851063) internal successors, (9540), 6768 states have internal predecessors, (9540), 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) [2021-12-14 14:59:56,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6769 states to 6769 states and 9540 transitions. [2021-12-14 14:59:56,300 INFO L78 Accepts]: Start accepts. Automaton has 6769 states and 9540 transitions. Word has length 78 [2021-12-14 14:59:56,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:59:56,300 INFO L470 AbstractCegarLoop]: Abstraction has 6769 states and 9540 transitions. [2021-12-14 14:59:56,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 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) [2021-12-14 14:59:56,300 INFO L276 IsEmpty]: Start isEmpty. Operand 6769 states and 9540 transitions. [2021-12-14 14:59:56,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-14 14:59:56,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:59:56,302 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] [2021-12-14 14:59:56,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 14:59:56,303 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:59:56,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:59:56,303 INFO L85 PathProgramCache]: Analyzing trace with hash -399378053, now seen corresponding path program 1 times [2021-12-14 14:59:56,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:59:56,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131802494] [2021-12-14 14:59:56,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:56,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:59:56,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 14:59:56,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:59:56,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131802494] [2021-12-14 14:59:56,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131802494] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:59:56,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:59:56,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 14:59:56,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365985089] [2021-12-14 14:59:56,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:59:56,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 14:59:56,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:59:56,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 14:59:56,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:59:56,345 INFO L87 Difference]: Start difference. First operand 6769 states and 9540 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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) [2021-12-14 14:59:56,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:59:56,676 INFO L93 Difference]: Finished difference Result 11443 states and 16241 transitions. [2021-12-14 14:59:56,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 14:59:56,676 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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) Word has length 78 [2021-12-14 14:59:56,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:59:56,694 INFO L225 Difference]: With dead ends: 11443 [2021-12-14 14:59:56,694 INFO L226 Difference]: Without dead ends: 10385 [2021-12-14 14:59:56,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 14:59:56,700 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 433 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:59:56,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 483 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:59:56,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10385 states. [2021-12-14 14:59:57,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10385 to 7825. [2021-12-14 14:59:57,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7825 states, 7824 states have (on average 1.4115541922290389) internal successors, (11044), 7824 states have internal predecessors, (11044), 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) [2021-12-14 14:59:57,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7825 states to 7825 states and 11044 transitions. [2021-12-14 14:59:57,069 INFO L78 Accepts]: Start accepts. Automaton has 7825 states and 11044 transitions. Word has length 78 [2021-12-14 14:59:57,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:59:57,070 INFO L470 AbstractCegarLoop]: Abstraction has 7825 states and 11044 transitions. [2021-12-14 14:59:57,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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) [2021-12-14 14:59:57,070 INFO L276 IsEmpty]: Start isEmpty. Operand 7825 states and 11044 transitions. [2021-12-14 14:59:57,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 14:59:57,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:59:57,073 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:59:57,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 14:59:57,073 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:59:57,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:59:57,074 INFO L85 PathProgramCache]: Analyzing trace with hash -32257762, now seen corresponding path program 1 times [2021-12-14 14:59:57,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:59:57,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558524296] [2021-12-14 14:59:57,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:57,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:59:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:57,228 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:59:57,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:59:57,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558524296] [2021-12-14 14:59:57,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558524296] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:59:57,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098727412] [2021-12-14 14:59:57,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:59:57,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:59:57,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:59:57,231 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) [2021-12-14 14:59:57,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 14:59:57,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:59:57,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-14 14:59:57,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:59:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 14:59:57,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:59:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 14:59:57,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098727412] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 14:59:57,882 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 14:59:57,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 4] total 16 [2021-12-14 14:59:57,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31375665] [2021-12-14 14:59:57,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 14:59:57,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-14 14:59:57,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:59:57,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-14 14:59:57,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:59:57,884 INFO L87 Difference]: Start difference. First operand 7825 states and 11044 transitions. Second operand has 16 states, 16 states have (on average 13.8125) internal successors, (221), 16 states have internal predecessors, (221), 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) [2021-12-14 15:00:01,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:00:01,671 INFO L93 Difference]: Finished difference Result 64057 states and 89990 transitions. [2021-12-14 15:00:01,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-14 15:00:01,672 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 13.8125) internal successors, (221), 16 states have internal predecessors, (221), 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) Word has length 79 [2021-12-14 15:00:01,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:00:01,794 INFO L225 Difference]: With dead ends: 64057 [2021-12-14 15:00:01,795 INFO L226 Difference]: Without dead ends: 58247 [2021-12-14 15:00:01,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1123, Invalid=4577, Unknown=0, NotChecked=0, Total=5700 [2021-12-14 15:00:01,818 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 2072 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2072 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 15:00:01,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2072 Valid, 1186 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 15:00:01,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58247 states. [2021-12-14 15:00:03,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58247 to 37053. [2021-12-14 15:00:03,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37053 states, 37052 states have (on average 1.3847565583504264) internal successors, (51308), 37052 states have internal predecessors, (51308), 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) [2021-12-14 15:00:03,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37053 states to 37053 states and 51308 transitions. [2021-12-14 15:00:03,499 INFO L78 Accepts]: Start accepts. Automaton has 37053 states and 51308 transitions. Word has length 79 [2021-12-14 15:00:03,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:00:03,499 INFO L470 AbstractCegarLoop]: Abstraction has 37053 states and 51308 transitions. [2021-12-14 15:00:03,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.8125) internal successors, (221), 16 states have internal predecessors, (221), 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) [2021-12-14 15:00:03,499 INFO L276 IsEmpty]: Start isEmpty. Operand 37053 states and 51308 transitions. [2021-12-14 15:00:03,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-14 15:00:03,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:00:03,502 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:00:03,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 15:00:03,720 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,SelfDestructingSolverStorable14 [2021-12-14 15:00:03,720 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:00:03,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:00:03,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1395542867, now seen corresponding path program 1 times [2021-12-14 15:00:03,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:00:03,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970457503] [2021-12-14 15:00:03,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:00:03,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:00:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:00:03,931 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:00:03,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:00:03,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970457503] [2021-12-14 15:00:03,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970457503] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:00:03,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752388407] [2021-12-14 15:00:03,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:00:03,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:00:03,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:00:03,932 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) [2021-12-14 15:00:03,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 15:00:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:00:04,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-14 15:00:04,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:00:04,876 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:00:04,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 15:00:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:00:05,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752388407] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 15:00:05,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 15:00:05,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2021-12-14 15:00:05,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210254160] [2021-12-14 15:00:05,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 15:00:05,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-14 15:00:05,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:00:05,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-14 15:00:05,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2021-12-14 15:00:05,862 INFO L87 Difference]: Start difference. First operand 37053 states and 51308 transitions. Second operand has 34 states, 34 states have (on average 6.029411764705882) internal successors, (205), 34 states have internal predecessors, (205), 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)