./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.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 c7d273a09ef49b5374355f70a7c3526050d90f635e0e9c0c426afbe9f20d712a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 01:37:56,764 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:37:56,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:37:56,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:37:56,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:37:56,806 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:37:56,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:37:56,811 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:37:56,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:37:56,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:37:56,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:37:56,822 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:37:56,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:37:56,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:37:56,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:37:56,824 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:37:56,825 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:37:56,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:37:56,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:37:56,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:37:56,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:37:56,829 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:37:56,832 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:37:56,833 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:37:56,837 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:37:56,838 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:37:56,838 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:37:56,839 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:37:56,839 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:37:56,840 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:37:56,840 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:37:56,841 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:37:56,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:37:56,842 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:37:56,843 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:37:56,843 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:37:56,844 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:37:56,844 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:37:56,844 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:37:56,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:37:56,846 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:37:56,849 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:37:56,875 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:37:56,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:37:56,877 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:37:56,877 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:37:56,877 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:37:56,878 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:37:56,879 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:37:56,879 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:37:56,879 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:37:56,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:37:56,880 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:37:56,880 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:37:56,880 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:37:56,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:37:56,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:37:56,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:37:56,881 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:37:56,881 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:37:56,881 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:37:56,881 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:37:56,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:37:56,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:37:56,882 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:37:56,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:37:56,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:37:56,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:37:56,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:37:56,883 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:37:56,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:37:56,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:37:56,883 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:37:56,883 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:37:56,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:37:56,884 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7d273a09ef49b5374355f70a7c3526050d90f635e0e9c0c426afbe9f20d712a [2021-12-28 01:37:57,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:37:57,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:37:57,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:37:57,154 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:37:57,154 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:37:57,155 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-28 01:37:57,211 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d159ce76/fc742e28af02492aada41aaceac958f4/FLAG89bbb7656 [2021-12-28 01:37:57,612 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:37:57,613 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-28 01:37:57,640 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d159ce76/fc742e28af02492aada41aaceac958f4/FLAG89bbb7656 [2021-12-28 01:37:57,649 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d159ce76/fc742e28af02492aada41aaceac958f4 [2021-12-28 01:37:57,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:37:57,652 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:37:57,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:37:57,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:37:57,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:37:57,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:37:57" (1/1) ... [2021-12-28 01:37:57,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4896bcbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:37:57, skipping insertion in model container [2021-12-28 01:37:57,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:37:57" (1/1) ... [2021-12-28 01:37:57,663 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:37:57,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:37:57,930 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-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[13826,13839] [2021-12-28 01:37:58,016 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:37:58,025 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:37:58,074 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-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[13826,13839] [2021-12-28 01:37:58,123 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:37:58,144 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:37:58,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:37:58 WrapperNode [2021-12-28 01:37:58,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:37:58,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:37:58,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:37:58,146 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:37:58,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:37:58" (1/1) ... [2021-12-28 01:37:58,162 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:37:58" (1/1) ... [2021-12-28 01:37:58,236 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1369 [2021-12-28 01:37:58,236 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:37:58,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:37:58,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:37:58,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:37:58,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:37:58" (1/1) ... [2021-12-28 01:37:58,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:37:58" (1/1) ... [2021-12-28 01:37:58,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:37:58" (1/1) ... [2021-12-28 01:37:58,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:37:58" (1/1) ... [2021-12-28 01:37:58,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:37:58" (1/1) ... [2021-12-28 01:37:58,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:37:58" (1/1) ... [2021-12-28 01:37:58,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:37:58" (1/1) ... [2021-12-28 01:37:58,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:37:58,275 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:37:58,275 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:37:58,275 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:37:58,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:37:58" (1/1) ... [2021-12-28 01:37:58,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:37:58,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:37:58,321 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) [2021-12-28 01:37:58,328 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 [2021-12-28 01:37:58,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:37:58,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:37:58,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:37:58,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:37:58,478 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:37:58,480 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:37:59,325 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:37:59,338 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:37:59,338 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-28 01:37:59,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:37:59 BoogieIcfgContainer [2021-12-28 01:37:59,342 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:37:59,343 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:37:59,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:37:59,345 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:37:59,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:37:57" (1/3) ... [2021-12-28 01:37:59,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@577f6c59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:37:59, skipping insertion in model container [2021-12-28 01:37:59,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:37:58" (2/3) ... [2021-12-28 01:37:59,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@577f6c59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:37:59, skipping insertion in model container [2021-12-28 01:37:59,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:37:59" (3/3) ... [2021-12-28 01:37:59,347 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-28 01:37:59,351 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:37:59,351 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 01:37:59,395 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:37:59,402 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 [2021-12-28 01:37:59,402 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 01:37:59,423 INFO L276 IsEmpty]: Start isEmpty. Operand has 350 states, 348 states have (on average 1.7873563218390804) internal successors, (622), 349 states have internal predecessors, (622), 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) [2021-12-28 01:37:59,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-28 01:37:59,447 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:37:59,448 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:37:59,448 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:37:59,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:37:59,452 INFO L85 PathProgramCache]: Analyzing trace with hash 687624892, now seen corresponding path program 1 times [2021-12-28 01:37:59,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:37:59,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259926855] [2021-12-28 01:37:59,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:37:59,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:37:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:37:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:37:59,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:37:59,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259926855] [2021-12-28 01:37:59,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259926855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:37:59,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:37:59,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:37:59,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549842165] [2021-12-28 01:37:59,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:37:59,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:37:59,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:37:59,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:37:59,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:37:59,897 INFO L87 Difference]: Start difference. First operand has 350 states, 348 states have (on average 1.7873563218390804) internal successors, (622), 349 states have internal predecessors, (622), 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 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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) [2021-12-28 01:38:00,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:38:00,037 INFO L93 Difference]: Finished difference Result 652 states and 1124 transitions. [2021-12-28 01:38:00,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:38:00,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 118 [2021-12-28 01:38:00,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:38:00,058 INFO L225 Difference]: With dead ends: 652 [2021-12-28 01:38:00,059 INFO L226 Difference]: Without dead ends: 489 [2021-12-28 01:38:00,062 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 [2021-12-28 01:38:00,066 INFO L933 BasicCegarLoop]: 616 mSDtfsCounter, 266 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:38:00,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 1146 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:38:00,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-12-28 01:38:00,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 486. [2021-12-28 01:38:00,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 1.6515463917525772) internal successors, (801), 485 states have internal predecessors, (801), 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) [2021-12-28 01:38:00,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 801 transitions. [2021-12-28 01:38:00,138 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 801 transitions. Word has length 118 [2021-12-28 01:38:00,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:38:00,138 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 801 transitions. [2021-12-28 01:38:00,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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) [2021-12-28 01:38:00,139 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 801 transitions. [2021-12-28 01:38:00,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-28 01:38:00,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:38:00,142 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:38:00,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:38:00,142 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:38:00,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:38:00,143 INFO L85 PathProgramCache]: Analyzing trace with hash 787881554, now seen corresponding path program 1 times [2021-12-28 01:38:00,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:38:00,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131204747] [2021-12-28 01:38:00,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:38:00,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:38:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:38:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:38:00,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:38:00,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131204747] [2021-12-28 01:38:00,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131204747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:38:00,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:38:00,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:38:00,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011911535] [2021-12-28 01:38:00,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:38:00,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:38:00,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:38:00,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:38:00,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:38:00,283 INFO L87 Difference]: Start difference. First operand 486 states and 801 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 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) [2021-12-28 01:38:00,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:38:00,341 INFO L93 Difference]: Finished difference Result 1052 states and 1741 transitions. [2021-12-28 01:38:00,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:38:00,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 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) Word has length 121 [2021-12-28 01:38:00,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:38:00,347 INFO L225 Difference]: With dead ends: 1052 [2021-12-28 01:38:00,347 INFO L226 Difference]: Without dead ends: 759 [2021-12-28 01:38:00,353 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 [2021-12-28 01:38:00,354 INFO L933 BasicCegarLoop]: 569 mSDtfsCounter, 229 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:38:00,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 1096 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:38:00,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-12-28 01:38:00,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 755. [2021-12-28 01:38:00,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 1.6525198938992043) internal successors, (1246), 754 states have internal predecessors, (1246), 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) [2021-12-28 01:38:00,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1246 transitions. [2021-12-28 01:38:00,412 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1246 transitions. Word has length 121 [2021-12-28 01:38:00,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:38:00,414 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 1246 transitions. [2021-12-28 01:38:00,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 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) [2021-12-28 01:38:00,416 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1246 transitions. [2021-12-28 01:38:00,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-28 01:38:00,420 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:38:00,421 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:38:00,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:38:00,423 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:38:00,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:38:00,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1106896185, now seen corresponding path program 1 times [2021-12-28 01:38:00,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:38:00,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119023392] [2021-12-28 01:38:00,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:38:00,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:38:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:38:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:38:00,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:38:00,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119023392] [2021-12-28 01:38:00,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119023392] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:38:00,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:38:00,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:38:00,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401578885] [2021-12-28 01:38:00,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:38:00,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:38:00,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:38:00,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:38:00,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:38:00,541 INFO L87 Difference]: Start difference. First operand 755 states and 1246 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 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) [2021-12-28 01:38:00,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:38:00,599 INFO L93 Difference]: Finished difference Result 1839 states and 3040 transitions. [2021-12-28 01:38:00,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:38:00,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 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 124 [2021-12-28 01:38:00,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:38:00,606 INFO L225 Difference]: With dead ends: 1839 [2021-12-28 01:38:00,606 INFO L226 Difference]: Without dead ends: 1277 [2021-12-28 01:38:00,607 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 [2021-12-28 01:38:00,611 INFO L933 BasicCegarLoop]: 569 mSDtfsCounter, 222 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:38:00,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 1097 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:38:00,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-12-28 01:38:00,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1271. [2021-12-28 01:38:00,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1271 states, 1270 states have (on average 1.6488188976377953) internal successors, (2094), 1270 states have internal predecessors, (2094), 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) [2021-12-28 01:38:00,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 2094 transitions. [2021-12-28 01:38:00,674 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 2094 transitions. Word has length 124 [2021-12-28 01:38:00,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:38:00,675 INFO L470 AbstractCegarLoop]: Abstraction has 1271 states and 2094 transitions. [2021-12-28 01:38:00,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 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) [2021-12-28 01:38:00,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 2094 transitions. [2021-12-28 01:38:00,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-28 01:38:00,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:38:00,677 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:38:00,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 01:38:00,677 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:38:00,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:38:00,678 INFO L85 PathProgramCache]: Analyzing trace with hash -854228413, now seen corresponding path program 1 times [2021-12-28 01:38:00,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:38:00,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913515843] [2021-12-28 01:38:00,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:38:00,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:38:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:38:00,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:38:00,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:38:00,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913515843] [2021-12-28 01:38:00,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913515843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:38:00,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:38:00,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:38:00,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735136663] [2021-12-28 01:38:00,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:38:00,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:38:00,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:38:00,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:38:00,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:38:00,738 INFO L87 Difference]: Start difference. First operand 1271 states and 2094 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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) [2021-12-28 01:38:00,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:38:00,859 INFO L93 Difference]: Finished difference Result 3347 states and 5512 transitions. [2021-12-28 01:38:00,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:38:00,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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 127 [2021-12-28 01:38:00,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:38:00,868 INFO L225 Difference]: With dead ends: 3347 [2021-12-28 01:38:00,868 INFO L226 Difference]: Without dead ends: 2269 [2021-12-28 01:38:00,870 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 [2021-12-28 01:38:00,870 INFO L933 BasicCegarLoop]: 569 mSDtfsCounter, 215 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:38:00,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 1098 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:38:00,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2021-12-28 01:38:00,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 2259. [2021-12-28 01:38:00,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2259 states, 2258 states have (on average 1.6412754650132861) internal successors, (3706), 2258 states have internal predecessors, (3706), 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) [2021-12-28 01:38:00,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 3706 transitions. [2021-12-28 01:38:00,993 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 3706 transitions. Word has length 127 [2021-12-28 01:38:00,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:38:00,993 INFO L470 AbstractCegarLoop]: Abstraction has 2259 states and 3706 transitions. [2021-12-28 01:38:00,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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) [2021-12-28 01:38:00,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 3706 transitions. [2021-12-28 01:38:00,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-28 01:38:00,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:38:00,995 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:38:00,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 01:38:00,996 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:38:00,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:38:00,996 INFO L85 PathProgramCache]: Analyzing trace with hash 996831134, now seen corresponding path program 1 times [2021-12-28 01:38:00,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:38:00,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795123787] [2021-12-28 01:38:00,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:38:00,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:38:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:38:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:38:01,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:38:01,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795123787] [2021-12-28 01:38:01,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795123787] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:38:01,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:38:01,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:38:01,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375628822] [2021-12-28 01:38:01,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:38:01,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:38:01,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:38:01,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:38:01,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:38:01,064 INFO L87 Difference]: Start difference. First operand 2259 states and 3706 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 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) [2021-12-28 01:38:01,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:38:01,758 INFO L93 Difference]: Finished difference Result 11839 states and 19570 transitions. [2021-12-28 01:38:01,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 01:38:01,759 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 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 130 [2021-12-28 01:38:01,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:38:01,793 INFO L225 Difference]: With dead ends: 11839 [2021-12-28 01:38:01,794 INFO L226 Difference]: Without dead ends: 9773 [2021-12-28 01:38:01,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:38:01,799 INFO L933 BasicCegarLoop]: 571 mSDtfsCounter, 2145 mSDsluCounter, 4278 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2145 SdHoareTripleChecker+Valid, 4849 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:38:01,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2145 Valid, 4849 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:38:01,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9773 states. [2021-12-28 01:38:02,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9773 to 4189. [2021-12-28 01:38:02,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4189 states, 4188 states have (on average 1.6411174785100286) internal successors, (6873), 4188 states have internal predecessors, (6873), 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) [2021-12-28 01:38:02,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4189 states to 4189 states and 6873 transitions. [2021-12-28 01:38:02,117 INFO L78 Accepts]: Start accepts. Automaton has 4189 states and 6873 transitions. Word has length 130 [2021-12-28 01:38:02,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:38:02,118 INFO L470 AbstractCegarLoop]: Abstraction has 4189 states and 6873 transitions. [2021-12-28 01:38:02,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 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) [2021-12-28 01:38:02,118 INFO L276 IsEmpty]: Start isEmpty. Operand 4189 states and 6873 transitions. [2021-12-28 01:38:02,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-28 01:38:02,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:38:02,120 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:38:02,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 01:38:02,121 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:38:02,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:38:02,121 INFO L85 PathProgramCache]: Analyzing trace with hash 769932088, now seen corresponding path program 1 times [2021-12-28 01:38:02,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:38:02,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286452420] [2021-12-28 01:38:02,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:38:02,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:38:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:38:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:38:02,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:38:02,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286452420] [2021-12-28 01:38:02,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286452420] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:38:02,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:38:02,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:38:02,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24800891] [2021-12-28 01:38:02,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:38:02,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:38:02,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:38:02,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:38:02,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:38:02,182 INFO L87 Difference]: Start difference. First operand 4189 states and 6873 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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) [2021-12-28 01:38:02,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:38:02,636 INFO L93 Difference]: Finished difference Result 12287 states and 20261 transitions. [2021-12-28 01:38:02,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:38:02,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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 131 [2021-12-28 01:38:02,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:38:02,673 INFO L225 Difference]: With dead ends: 12287 [2021-12-28 01:38:02,673 INFO L226 Difference]: Without dead ends: 8291 [2021-12-28 01:38:02,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:38:02,680 INFO L933 BasicCegarLoop]: 563 mSDtfsCounter, 754 mSDsluCounter, 1150 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 1713 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:38:02,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [754 Valid, 1713 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:38:02,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8291 states. [2021-12-28 01:38:03,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8291 to 6223. [2021-12-28 01:38:03,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6223 states, 6222 states have (on average 1.6435229829636773) internal successors, (10226), 6222 states have internal predecessors, (10226), 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) [2021-12-28 01:38:03,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6223 states to 6223 states and 10226 transitions. [2021-12-28 01:38:03,056 INFO L78 Accepts]: Start accepts. Automaton has 6223 states and 10226 transitions. Word has length 131 [2021-12-28 01:38:03,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:38:03,056 INFO L470 AbstractCegarLoop]: Abstraction has 6223 states and 10226 transitions. [2021-12-28 01:38:03,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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) [2021-12-28 01:38:03,057 INFO L276 IsEmpty]: Start isEmpty. Operand 6223 states and 10226 transitions. [2021-12-28 01:38:03,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-28 01:38:03,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:38:03,059 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:38:03,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 01:38:03,060 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:38:03,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:38:03,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1964413019, now seen corresponding path program 1 times [2021-12-28 01:38:03,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:38:03,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434446118] [2021-12-28 01:38:03,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:38:03,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:38:03,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:38:03,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:38:03,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:38:03,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434446118] [2021-12-28 01:38:03,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434446118] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:38:03,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:38:03,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:38:03,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125683486] [2021-12-28 01:38:03,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:38:03,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:38:03,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:38:03,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:38:03,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:38:03,169 INFO L87 Difference]: Start difference. First operand 6223 states and 10226 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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) [2021-12-28 01:38:03,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:38:03,916 INFO L93 Difference]: Finished difference Result 18285 states and 30121 transitions. [2021-12-28 01:38:03,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:38:03,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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 132 [2021-12-28 01:38:03,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:38:03,942 INFO L225 Difference]: With dead ends: 18285 [2021-12-28 01:38:03,942 INFO L226 Difference]: Without dead ends: 12255 [2021-12-28 01:38:03,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:38:03,956 INFO L933 BasicCegarLoop]: 567 mSDtfsCounter, 752 mSDsluCounter, 1207 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 1774 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:38:03,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [752 Valid, 1774 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:38:03,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12255 states. [2021-12-28 01:38:04,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12255 to 9215. [2021-12-28 01:38:04,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9215 states, 9214 states have (on average 1.6418493596700674) internal successors, (15128), 9214 states have internal predecessors, (15128), 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) [2021-12-28 01:38:04,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9215 states to 9215 states and 15128 transitions. [2021-12-28 01:38:04,498 INFO L78 Accepts]: Start accepts. Automaton has 9215 states and 15128 transitions. Word has length 132 [2021-12-28 01:38:04,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:38:04,498 INFO L470 AbstractCegarLoop]: Abstraction has 9215 states and 15128 transitions. [2021-12-28 01:38:04,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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) [2021-12-28 01:38:04,499 INFO L276 IsEmpty]: Start isEmpty. Operand 9215 states and 15128 transitions. [2021-12-28 01:38:04,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-28 01:38:04,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:38:04,502 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:38:04,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 01:38:04,503 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:38:04,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:38:04,503 INFO L85 PathProgramCache]: Analyzing trace with hash -825207393, now seen corresponding path program 1 times [2021-12-28 01:38:04,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:38:04,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687063994] [2021-12-28 01:38:04,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:38:04,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:38:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:38:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:38:04,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:38:04,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687063994] [2021-12-28 01:38:04,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687063994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:38:04,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:38:04,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:38:04,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561075413] [2021-12-28 01:38:04,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:38:04,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:38:04,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:38:04,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:38:04,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:38:04,553 INFO L87 Difference]: Start difference. First operand 9215 states and 15128 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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) [2021-12-28 01:38:05,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:38:05,521 INFO L93 Difference]: Finished difference Result 27109 states and 44609 transitions. [2021-12-28 01:38:05,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:38:05,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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 133 [2021-12-28 01:38:05,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:38:05,555 INFO L225 Difference]: With dead ends: 27109 [2021-12-28 01:38:05,555 INFO L226 Difference]: Without dead ends: 18087 [2021-12-28 01:38:05,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:38:05,571 INFO L933 BasicCegarLoop]: 561 mSDtfsCounter, 750 mSDsluCounter, 1335 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 1896 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:38:05,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [750 Valid, 1896 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:38:05,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18087 states. [2021-12-28 01:38:06,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18087 to 13617. [2021-12-28 01:38:06,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13617 states, 13616 states have (on average 1.640129259694477) internal successors, (22332), 13616 states have internal predecessors, (22332), 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) [2021-12-28 01:38:06,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13617 states to 13617 states and 22332 transitions. [2021-12-28 01:38:06,523 INFO L78 Accepts]: Start accepts. Automaton has 13617 states and 22332 transitions. Word has length 133 [2021-12-28 01:38:06,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:38:06,524 INFO L470 AbstractCegarLoop]: Abstraction has 13617 states and 22332 transitions. [2021-12-28 01:38:06,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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) [2021-12-28 01:38:06,525 INFO L276 IsEmpty]: Start isEmpty. Operand 13617 states and 22332 transitions. [2021-12-28 01:38:06,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-28 01:38:06,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:38:06,529 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:38:06,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 01:38:06,530 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:38:06,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:38:06,530 INFO L85 PathProgramCache]: Analyzing trace with hash 2032293143, now seen corresponding path program 1 times [2021-12-28 01:38:06,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:38:06,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317849259] [2021-12-28 01:38:06,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:38:06,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:38:06,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:38:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:38:06,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:38:06,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317849259] [2021-12-28 01:38:06,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317849259] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:38:06,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:38:06,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:38:06,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988151375] [2021-12-28 01:38:06,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:38:06,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:38:06,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:38:06,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:38:06,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:38:06,577 INFO L87 Difference]: Start difference. First operand 13617 states and 22332 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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) [2021-12-28 01:38:07,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:38:07,739 INFO L93 Difference]: Finished difference Result 30205 states and 49579 transitions. [2021-12-28 01:38:07,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:38:07,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 134 [2021-12-28 01:38:07,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:38:07,781 INFO L225 Difference]: With dead ends: 30205 [2021-12-28 01:38:07,782 INFO L226 Difference]: Without dead ends: 20859 [2021-12-28 01:38:07,796 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 [2021-12-28 01:38:07,798 INFO L933 BasicCegarLoop]: 717 mSDtfsCounter, 228 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 1243 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 [2021-12-28 01:38:07,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 1243 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:38:07,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20859 states. [2021-12-28 01:38:09,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20859 to 20857. [2021-12-28 01:38:09,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20857 states, 20856 states have (on average 1.635548523206751) internal successors, (34111), 20856 states have internal predecessors, (34111), 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) [2021-12-28 01:38:09,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20857 states to 20857 states and 34111 transitions. [2021-12-28 01:38:09,254 INFO L78 Accepts]: Start accepts. Automaton has 20857 states and 34111 transitions. Word has length 134 [2021-12-28 01:38:09,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:38:09,255 INFO L470 AbstractCegarLoop]: Abstraction has 20857 states and 34111 transitions. [2021-12-28 01:38:09,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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) [2021-12-28 01:38:09,255 INFO L276 IsEmpty]: Start isEmpty. Operand 20857 states and 34111 transitions. [2021-12-28 01:38:09,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-28 01:38:09,258 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:38:09,258 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:38:09,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 01:38:09,258 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:38:09,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:38:09,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1085233451, now seen corresponding path program 1 times [2021-12-28 01:38:09,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:38:09,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495720739] [2021-12-28 01:38:09,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:38:09,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:38:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:38:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:38:09,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:38:09,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495720739] [2021-12-28 01:38:09,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495720739] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:38:09,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:38:09,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:38:09,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485587758] [2021-12-28 01:38:09,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:38:09,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:38:09,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:38:09,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:38:09,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:38:09,311 INFO L87 Difference]: Start difference. First operand 20857 states and 34111 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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) [2021-12-28 01:38:11,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:38:11,278 INFO L93 Difference]: Finished difference Result 46075 states and 75425 transitions. [2021-12-28 01:38:11,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:38:11,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 134 [2021-12-28 01:38:11,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:38:11,352 INFO L225 Difference]: With dead ends: 46075 [2021-12-28 01:38:11,353 INFO L226 Difference]: Without dead ends: 31711 [2021-12-28 01:38:11,385 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 [2021-12-28 01:38:11,386 INFO L933 BasicCegarLoop]: 683 mSDtfsCounter, 221 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1210 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 [2021-12-28 01:38:11,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 1210 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:38:11,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31711 states. [2021-12-28 01:38:13,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31711 to 31709. [2021-12-28 01:38:13,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31709 states, 31708 states have (on average 1.6302825785290778) internal successors, (51693), 31708 states have internal predecessors, (51693), 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) [2021-12-28 01:38:13,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31709 states to 31709 states and 51693 transitions. [2021-12-28 01:38:13,266 INFO L78 Accepts]: Start accepts. Automaton has 31709 states and 51693 transitions. Word has length 134 [2021-12-28 01:38:13,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:38:13,266 INFO L470 AbstractCegarLoop]: Abstraction has 31709 states and 51693 transitions. [2021-12-28 01:38:13,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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) [2021-12-28 01:38:13,267 INFO L276 IsEmpty]: Start isEmpty. Operand 31709 states and 51693 transitions. [2021-12-28 01:38:13,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-28 01:38:13,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:38:13,268 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:38:13,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 01:38:13,269 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:38:13,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:38:13,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1854132875, now seen corresponding path program 1 times [2021-12-28 01:38:13,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:38:13,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611672172] [2021-12-28 01:38:13,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:38:13,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:38:13,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:38:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:38:13,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:38:13,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611672172] [2021-12-28 01:38:13,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611672172] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:38:13,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:38:13,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:38:13,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584024359] [2021-12-28 01:38:13,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:38:13,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:38:13,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:38:13,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:38:13,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:38:13,313 INFO L87 Difference]: Start difference. First operand 31709 states and 51693 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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) [2021-12-28 01:38:16,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:38:16,107 INFO L93 Difference]: Finished difference Result 61885 states and 101019 transitions. [2021-12-28 01:38:16,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:38:16,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 134 [2021-12-28 01:38:16,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:38:16,183 INFO L225 Difference]: With dead ends: 61885 [2021-12-28 01:38:16,183 INFO L226 Difference]: Without dead ends: 44439 [2021-12-28 01:38:16,209 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 [2021-12-28 01:38:16,210 INFO L933 BasicCegarLoop]: 650 mSDtfsCounter, 214 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 1178 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 [2021-12-28 01:38:16,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 1178 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:38:16,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44439 states. [2021-12-28 01:38:19,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44439 to 44437. [2021-12-28 01:38:19,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44437 states, 44436 states have (on average 1.6252362948960302) internal successors, (72219), 44436 states have internal predecessors, (72219), 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) [2021-12-28 01:38:19,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44437 states to 44437 states and 72219 transitions. [2021-12-28 01:38:19,215 INFO L78 Accepts]: Start accepts. Automaton has 44437 states and 72219 transitions. Word has length 134 [2021-12-28 01:38:19,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:38:19,215 INFO L470 AbstractCegarLoop]: Abstraction has 44437 states and 72219 transitions. [2021-12-28 01:38:19,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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) [2021-12-28 01:38:19,216 INFO L276 IsEmpty]: Start isEmpty. Operand 44437 states and 72219 transitions. [2021-12-28 01:38:19,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-28 01:38:19,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:38:19,217 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:38:19,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 01:38:19,218 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:38:19,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:38:19,218 INFO L85 PathProgramCache]: Analyzing trace with hash 134986668, now seen corresponding path program 1 times [2021-12-28 01:38:19,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:38:19,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926018901] [2021-12-28 01:38:19,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:38:19,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:38:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:38:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:38:19,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:38:19,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926018901] [2021-12-28 01:38:19,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926018901] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:38:19,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:38:19,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:38:19,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651344585] [2021-12-28 01:38:19,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:38:19,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:38:19,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:38:19,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:38:19,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:38:19,265 INFO L87 Difference]: Start difference. First operand 44437 states and 72219 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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) [2021-12-28 01:38:25,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:38:25,207 INFO L93 Difference]: Finished difference Result 141593 states and 230510 transitions. [2021-12-28 01:38:25,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:38:25,208 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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 134 [2021-12-28 01:38:25,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:38:25,508 INFO L225 Difference]: With dead ends: 141593 [2021-12-28 01:38:25,511 INFO L226 Difference]: Without dead ends: 97569 [2021-12-28 01:38:25,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:38:25,579 INFO L933 BasicCegarLoop]: 561 mSDtfsCounter, 748 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 1898 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:38:25,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [748 Valid, 1898 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:38:25,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97569 states. [2021-12-28 01:38:30,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97569 to 70869. [2021-12-28 01:38:30,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70869 states, 70868 states have (on average 1.6215922560252864) internal successors, (114919), 70868 states have internal predecessors, (114919), 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) [2021-12-28 01:38:31,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70869 states to 70869 states and 114919 transitions. [2021-12-28 01:38:31,036 INFO L78 Accepts]: Start accepts. Automaton has 70869 states and 114919 transitions. Word has length 134 [2021-12-28 01:38:31,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:38:31,036 INFO L470 AbstractCegarLoop]: Abstraction has 70869 states and 114919 transitions. [2021-12-28 01:38:31,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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) [2021-12-28 01:38:31,037 INFO L276 IsEmpty]: Start isEmpty. Operand 70869 states and 114919 transitions. [2021-12-28 01:38:31,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-28 01:38:31,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:38:31,038 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:38:31,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 01:38:31,039 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:38:31,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:38:31,040 INFO L85 PathProgramCache]: Analyzing trace with hash -415568993, now seen corresponding path program 1 times [2021-12-28 01:38:31,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:38:31,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488436875] [2021-12-28 01:38:31,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:38:31,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:38:31,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:38:31,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:38:31,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:38:31,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488436875] [2021-12-28 01:38:31,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488436875] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:38:31,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:38:31,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:38:31,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446812469] [2021-12-28 01:38:31,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:38:31,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:38:31,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:38:31,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:38:31,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:38:31,088 INFO L87 Difference]: Start difference. First operand 70869 states and 114919 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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)