./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8ec94212d42d56ec4ec8ccfb1876cba582c3e983611a6a88d38f3b3edc8b85b6 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 11:47:44,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 11:47:44,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 11:47:44,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 11:47:44,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 11:47:44,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 11:47:44,070 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 11:47:44,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 11:47:44,074 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 11:47:44,074 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 11:47:44,075 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 11:47:44,076 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 11:47:44,077 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 11:47:44,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 11:47:44,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 11:47:44,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 11:47:44,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 11:47:44,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 11:47:44,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 11:47:44,084 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 11:47:44,086 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 11:47:44,087 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 11:47:44,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 11:47:44,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 11:47:44,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 11:47:44,091 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 11:47:44,092 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 11:47:44,092 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 11:47:44,093 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 11:47:44,094 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 11:47:44,094 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 11:47:44,095 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 11:47:44,095 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 11:47:44,096 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 11:47:44,097 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 11:47:44,097 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 11:47:44,098 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 11:47:44,098 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 11:47:44,098 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 11:47:44,099 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 11:47:44,100 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 11:47:44,100 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 11:47:44,123 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 11:47:44,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 11:47:44,123 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 11:47:44,123 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 11:47:44,124 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 11:47:44,124 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 11:47:44,125 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 11:47:44,125 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 11:47:44,125 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 11:47:44,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 11:47:44,126 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 11:47:44,126 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 11:47:44,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 11:47:44,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 11:47:44,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 11:47:44,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 11:47:44,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 11:47:44,127 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 11:47:44,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 11:47:44,127 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 11:47:44,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 11:47:44,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 11:47:44,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 11:47:44,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 11:47:44,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:47:44,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 11:47:44,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 11:47:44,129 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 11:47:44,129 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 11:47:44,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 11:47:44,130 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 11:47:44,130 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 11:47:44,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 11:47:44,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 11:47:44,131 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ec94212d42d56ec4ec8ccfb1876cba582c3e983611a6a88d38f3b3edc8b85b6 [2021-12-22 11:47:44,354 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 11:47:44,376 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 11:47:44,378 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 11:47:44,379 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 11:47:44,380 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 11:47:44,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c [2021-12-22 11:47:44,448 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebd388a16/80dd1634e36546ba93cb7e58a5e0528a/FLAG6731b36eb [2021-12-22 11:47:44,846 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 11:47:44,853 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c [2021-12-22 11:47:44,861 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebd388a16/80dd1634e36546ba93cb7e58a5e0528a/FLAG6731b36eb [2021-12-22 11:47:44,874 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebd388a16/80dd1634e36546ba93cb7e58a5e0528a [2021-12-22 11:47:44,876 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 11:47:44,877 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 11:47:44,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 11:47:44,884 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 11:47:44,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 11:47:44,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:47:44" (1/1) ... [2021-12-22 11:47:44,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4315ff00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:47:44, skipping insertion in model container [2021-12-22 11:47:44,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:47:44" (1/1) ... [2021-12-22 11:47:44,896 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 11:47:44,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 11:47:45,225 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c[11552,11565] [2021-12-22 11:47:45,237 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:47:45,252 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 11:47:45,332 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c[11552,11565] [2021-12-22 11:47:45,339 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:47:45,354 INFO L208 MainTranslator]: Completed translation [2021-12-22 11:47:45,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:47:45 WrapperNode [2021-12-22 11:47:45,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 11:47:45,357 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 11:47:45,357 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 11:47:45,357 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 11:47:45,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:47:45" (1/1) ... [2021-12-22 11:47:45,385 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:47:45" (1/1) ... [2021-12-22 11:47:45,421 INFO L137 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 431 [2021-12-22 11:47:45,422 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 11:47:45,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 11:47:45,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 11:47:45,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 11:47:45,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:47:45" (1/1) ... [2021-12-22 11:47:45,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:47:45" (1/1) ... [2021-12-22 11:47:45,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:47:45" (1/1) ... [2021-12-22 11:47:45,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:47:45" (1/1) ... [2021-12-22 11:47:45,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:47:45" (1/1) ... [2021-12-22 11:47:45,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:47:45" (1/1) ... [2021-12-22 11:47:45,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:47:45" (1/1) ... [2021-12-22 11:47:45,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 11:47:45,457 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 11:47:45,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 11:47:45,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 11:47:45,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:47:45" (1/1) ... [2021-12-22 11:47:45,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:47:45,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:47:45,518 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 11:47:45,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 11:47:45,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 11:47:45,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 11:47:45,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 11:47:45,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 11:47:45,663 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 11:47:45,666 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 11:47:46,070 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 11:47:46,077 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 11:47:46,078 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 11:47:46,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:47:46 BoogieIcfgContainer [2021-12-22 11:47:46,080 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 11:47:46,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 11:47:46,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 11:47:46,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 11:47:46,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:47:44" (1/3) ... [2021-12-22 11:47:46,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@576aa7dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:47:46, skipping insertion in model container [2021-12-22 11:47:46,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:47:45" (2/3) ... [2021-12-22 11:47:46,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@576aa7dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:47:46, skipping insertion in model container [2021-12-22 11:47:46,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:47:46" (3/3) ... [2021-12-22 11:47:46,086 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c [2021-12-22 11:47:46,089 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 11:47:46,089 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 11:47:46,141 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 11:47:46,146 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 11:47:46,147 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 11:47:46,162 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 129 states have (on average 1.7364341085271318) internal successors, (224), 130 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:46,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-22 11:47:46,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:46,170 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] [2021-12-22 11:47:46,170 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:46,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:46,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1238377303, now seen corresponding path program 1 times [2021-12-22 11:47:46,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:46,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868319923] [2021-12-22 11:47:46,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:46,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:46,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:46,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:46,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:46,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868319923] [2021-12-22 11:47:46,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868319923] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:46,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:46,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 11:47:46,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498298914] [2021-12-22 11:47:46,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:46,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 11:47:46,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:46,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 11:47:46,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 11:47:46,432 INFO L87 Difference]: Start difference. First operand has 131 states, 129 states have (on average 1.7364341085271318) internal successors, (224), 130 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:46,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:46,475 INFO L93 Difference]: Finished difference Result 208 states and 355 transitions. [2021-12-22 11:47:46,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 11:47:46,478 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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 37 [2021-12-22 11:47:46,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:46,488 INFO L225 Difference]: With dead ends: 208 [2021-12-22 11:47:46,489 INFO L226 Difference]: Without dead ends: 127 [2021-12-22 11:47:46,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 11:47:46,495 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:47:46,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:46,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-22 11:47:46,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-12-22 11:47:46,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.7222222222222223) internal successors, (217), 126 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:46,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 217 transitions. [2021-12-22 11:47:46,545 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 217 transitions. Word has length 37 [2021-12-22 11:47:46,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:46,546 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 217 transitions. [2021-12-22 11:47:46,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:46,547 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 217 transitions. [2021-12-22 11:47:46,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-22 11:47:46,549 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:46,549 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] [2021-12-22 11:47:46,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 11:47:46,550 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:46,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:46,553 INFO L85 PathProgramCache]: Analyzing trace with hash 420728853, now seen corresponding path program 1 times [2021-12-22 11:47:46,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:46,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655347356] [2021-12-22 11:47:46,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:46,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:46,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:46,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655347356] [2021-12-22 11:47:46,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655347356] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:46,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:46,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:47:46,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345736760] [2021-12-22 11:47:46,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:46,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:47:46,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:46,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:47:46,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:47:46,716 INFO L87 Difference]: Start difference. First operand 127 states and 217 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:46,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:46,799 INFO L93 Difference]: Finished difference Result 207 states and 348 transitions. [2021-12-22 11:47:46,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:47:46,799 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 37 [2021-12-22 11:47:46,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:46,800 INFO L225 Difference]: With dead ends: 207 [2021-12-22 11:47:46,801 INFO L226 Difference]: Without dead ends: 127 [2021-12-22 11:47:46,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:47:46,802 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 3 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:47:46,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 836 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:46,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-22 11:47:46,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-12-22 11:47:46,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.5555555555555556) internal successors, (196), 126 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:46,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 196 transitions. [2021-12-22 11:47:46,812 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 196 transitions. Word has length 37 [2021-12-22 11:47:46,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:46,813 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 196 transitions. [2021-12-22 11:47:46,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:46,814 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 196 transitions. [2021-12-22 11:47:46,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 11:47:46,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:46,819 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] [2021-12-22 11:47:46,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 11:47:46,821 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:46,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:46,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1846122567, now seen corresponding path program 1 times [2021-12-22 11:47:46,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:46,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332462616] [2021-12-22 11:47:46,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:46,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:46,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:46,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332462616] [2021-12-22 11:47:46,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332462616] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:46,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:46,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:47:46,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602782623] [2021-12-22 11:47:46,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:46,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:47:46,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:46,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:47:46,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:47:46,933 INFO L87 Difference]: Start difference. First operand 127 states and 196 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:46,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:46,985 INFO L93 Difference]: Finished difference Result 270 states and 433 transitions. [2021-12-22 11:47:46,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:47:46,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 57 [2021-12-22 11:47:46,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:46,988 INFO L225 Difference]: With dead ends: 270 [2021-12-22 11:47:46,988 INFO L226 Difference]: Without dead ends: 194 [2021-12-22 11:47:46,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:47:46,990 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 101 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:47:46,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 349 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:46,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-12-22 11:47:47,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 191. [2021-12-22 11:47:47,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.568421052631579) internal successors, (298), 190 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:47,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 298 transitions. [2021-12-22 11:47:47,003 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 298 transitions. Word has length 57 [2021-12-22 11:47:47,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:47,004 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 298 transitions. [2021-12-22 11:47:47,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:47,004 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 298 transitions. [2021-12-22 11:47:47,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-22 11:47:47,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:47,006 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] [2021-12-22 11:47:47,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 11:47:47,006 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:47,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:47,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1343531320, now seen corresponding path program 1 times [2021-12-22 11:47:47,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:47,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884044422] [2021-12-22 11:47:47,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:47,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:47,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:47,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884044422] [2021-12-22 11:47:47,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884044422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:47,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:47,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:47:47,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996290767] [2021-12-22 11:47:47,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:47,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:47:47,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:47,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:47:47,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:47:47,084 INFO L87 Difference]: Start difference. First operand 191 states and 298 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:47,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:47,108 INFO L93 Difference]: Finished difference Result 457 states and 730 transitions. [2021-12-22 11:47:47,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:47:47,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 59 [2021-12-22 11:47:47,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:47,112 INFO L225 Difference]: With dead ends: 457 [2021-12-22 11:47:47,113 INFO L226 Difference]: Without dead ends: 317 [2021-12-22 11:47:47,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:47:47,117 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 103 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 362 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 [2021-12-22 11:47:47,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 362 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:47,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-12-22 11:47:47,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 313. [2021-12-22 11:47:47,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.5833333333333333) internal successors, (494), 312 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:47,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 494 transitions. [2021-12-22 11:47:47,157 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 494 transitions. Word has length 59 [2021-12-22 11:47:47,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:47,157 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 494 transitions. [2021-12-22 11:47:47,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:47,159 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 494 transitions. [2021-12-22 11:47:47,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-22 11:47:47,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:47,161 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:47:47,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 11:47:47,162 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:47,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:47,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1628241783, now seen corresponding path program 1 times [2021-12-22 11:47:47,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:47,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006040255] [2021-12-22 11:47:47,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:47,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:47,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:47,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:47,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:47,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006040255] [2021-12-22 11:47:47,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006040255] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:47,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:47,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:47:47,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613709364] [2021-12-22 11:47:47,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:47,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:47:47,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:47,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:47:47,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:47:47,227 INFO L87 Difference]: Start difference. First operand 313 states and 494 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:47,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:47,270 INFO L93 Difference]: Finished difference Result 809 states and 1292 transitions. [2021-12-22 11:47:47,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:47:47,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 61 [2021-12-22 11:47:47,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:47,274 INFO L225 Difference]: With dead ends: 809 [2021-12-22 11:47:47,274 INFO L226 Difference]: Without dead ends: 547 [2021-12-22 11:47:47,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:47:47,279 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 97 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 363 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 [2021-12-22 11:47:47,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 363 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:47,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-12-22 11:47:47,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 541. [2021-12-22 11:47:47,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 1.5814814814814815) internal successors, (854), 540 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:47,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 854 transitions. [2021-12-22 11:47:47,316 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 854 transitions. Word has length 61 [2021-12-22 11:47:47,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:47,318 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 854 transitions. [2021-12-22 11:47:47,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:47,318 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 854 transitions. [2021-12-22 11:47:47,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-22 11:47:47,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:47,319 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:47:47,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 11:47:47,320 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:47,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:47,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1563109830, now seen corresponding path program 1 times [2021-12-22 11:47:47,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:47,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020765267] [2021-12-22 11:47:47,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:47,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:47,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:47,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020765267] [2021-12-22 11:47:47,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020765267] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:47,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:47,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:47:47,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432874843] [2021-12-22 11:47:47,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:47,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:47:47,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:47,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:47:47,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:47:47,412 INFO L87 Difference]: Start difference. First operand 541 states and 854 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:47,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:47,571 INFO L93 Difference]: Finished difference Result 2333 states and 3776 transitions. [2021-12-22 11:47:47,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 11:47:47,572 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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 63 [2021-12-22 11:47:47,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:47,579 INFO L225 Difference]: With dead ends: 2333 [2021-12-22 11:47:47,579 INFO L226 Difference]: Without dead ends: 1843 [2021-12-22 11:47:47,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:47:47,584 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 828 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:47:47,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [828 Valid, 1143 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:47:47,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2021-12-22 11:47:47,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 969. [2021-12-22 11:47:47,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 968 states have (on average 1.5919421487603307) internal successors, (1541), 968 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:47,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1541 transitions. [2021-12-22 11:47:47,634 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1541 transitions. Word has length 63 [2021-12-22 11:47:47,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:47,634 INFO L470 AbstractCegarLoop]: Abstraction has 969 states and 1541 transitions. [2021-12-22 11:47:47,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:47,635 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1541 transitions. [2021-12-22 11:47:47,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-22 11:47:47,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:47,636 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:47:47,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 11:47:47,636 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:47,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:47,637 INFO L85 PathProgramCache]: Analyzing trace with hash -711068186, now seen corresponding path program 1 times [2021-12-22 11:47:47,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:47,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574178792] [2021-12-22 11:47:47,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:47,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:47,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:47,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574178792] [2021-12-22 11:47:47,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574178792] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:47,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:47,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:47:47,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703284580] [2021-12-22 11:47:47,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:47,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:47:47,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:47,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:47:47,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:47:47,708 INFO L87 Difference]: Start difference. First operand 969 states and 1541 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:47,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:47,826 INFO L93 Difference]: Finished difference Result 2831 states and 4571 transitions. [2021-12-22 11:47:47,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:47:47,827 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 64 [2021-12-22 11:47:47,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:47,836 INFO L225 Difference]: With dead ends: 2831 [2021-12-22 11:47:47,836 INFO L226 Difference]: Without dead ends: 1913 [2021-12-22 11:47:47,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:47:47,840 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 363 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 644 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 [2021-12-22 11:47:47,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 644 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:47,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-12-22 11:47:47,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1432. [2021-12-22 11:47:47,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1431 states have (on average 1.6009783368273933) internal successors, (2291), 1431 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:47,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 2291 transitions. [2021-12-22 11:47:47,911 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 2291 transitions. Word has length 64 [2021-12-22 11:47:47,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:47,912 INFO L470 AbstractCegarLoop]: Abstraction has 1432 states and 2291 transitions. [2021-12-22 11:47:47,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:47,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 2291 transitions. [2021-12-22 11:47:47,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 11:47:47,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:47,915 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] [2021-12-22 11:47:47,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 11:47:47,915 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:47,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:47,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1972861693, now seen corresponding path program 1 times [2021-12-22 11:47:47,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:47,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545068802] [2021-12-22 11:47:47,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:47,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:47,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:47,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:47,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545068802] [2021-12-22 11:47:47,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545068802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:47,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:47,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:47:47,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665222488] [2021-12-22 11:47:47,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:47,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:47:47,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:47,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:47:47,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:47:47,974 INFO L87 Difference]: Start difference. First operand 1432 states and 2291 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:48,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:48,113 INFO L93 Difference]: Finished difference Result 4159 states and 6709 transitions. [2021-12-22 11:47:48,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:47:48,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 65 [2021-12-22 11:47:48,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:48,124 INFO L225 Difference]: With dead ends: 4159 [2021-12-22 11:47:48,124 INFO L226 Difference]: Without dead ends: 2778 [2021-12-22 11:47:48,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:47:48,127 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 363 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 643 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 [2021-12-22 11:47:48,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 643 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:48,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2021-12-22 11:47:48,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 2093. [2021-12-22 11:47:48,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2093 states, 2092 states have (on average 1.6003824091778203) internal successors, (3348), 2092 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:48,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2093 states to 2093 states and 3348 transitions. [2021-12-22 11:47:48,238 INFO L78 Accepts]: Start accepts. Automaton has 2093 states and 3348 transitions. Word has length 65 [2021-12-22 11:47:48,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:48,239 INFO L470 AbstractCegarLoop]: Abstraction has 2093 states and 3348 transitions. [2021-12-22 11:47:48,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:48,239 INFO L276 IsEmpty]: Start isEmpty. Operand 2093 states and 3348 transitions. [2021-12-22 11:47:48,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 11:47:48,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:48,240 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:47:48,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 11:47:48,241 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:48,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:48,241 INFO L85 PathProgramCache]: Analyzing trace with hash -555653635, now seen corresponding path program 1 times [2021-12-22 11:47:48,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:48,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188462046] [2021-12-22 11:47:48,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:48,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:48,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:48,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:48,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188462046] [2021-12-22 11:47:48,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188462046] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:48,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:48,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:47:48,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673454184] [2021-12-22 11:47:48,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:48,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:47:48,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:48,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:47:48,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:47:48,278 INFO L87 Difference]: Start difference. First operand 2093 states and 3348 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:48,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:48,450 INFO L93 Difference]: Finished difference Result 6043 states and 9733 transitions. [2021-12-22 11:47:48,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:47:48,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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 66 [2021-12-22 11:47:48,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:48,464 INFO L225 Difference]: With dead ends: 6043 [2021-12-22 11:47:48,464 INFO L226 Difference]: Without dead ends: 4001 [2021-12-22 11:47:48,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:47:48,467 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 361 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 652 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 [2021-12-22 11:47:48,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 652 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:48,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-12-22 11:47:48,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 3031. [2021-12-22 11:47:48,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3031 states, 3030 states have (on average 1.5986798679867986) internal successors, (4844), 3030 states have internal predecessors, (4844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:48,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3031 states to 3031 states and 4844 transitions. [2021-12-22 11:47:48,599 INFO L78 Accepts]: Start accepts. Automaton has 3031 states and 4844 transitions. Word has length 66 [2021-12-22 11:47:48,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:48,599 INFO L470 AbstractCegarLoop]: Abstraction has 3031 states and 4844 transitions. [2021-12-22 11:47:48,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:48,600 INFO L276 IsEmpty]: Start isEmpty. Operand 3031 states and 4844 transitions. [2021-12-22 11:47:48,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 11:47:48,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:48,602 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:47:48,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 11:47:48,602 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:48,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:48,603 INFO L85 PathProgramCache]: Analyzing trace with hash -378063148, now seen corresponding path program 1 times [2021-12-22 11:47:48,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:48,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197734691] [2021-12-22 11:47:48,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:48,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:48,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:48,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:48,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:48,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197734691] [2021-12-22 11:47:48,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197734691] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:48,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:48,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:47:48,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986198476] [2021-12-22 11:47:48,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:48,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:47:48,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:48,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:47:48,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:47:48,637 INFO L87 Difference]: Start difference. First operand 3031 states and 4844 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:48,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:48,822 INFO L93 Difference]: Finished difference Result 6926 states and 11080 transitions. [2021-12-22 11:47:48,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:47:48,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2021-12-22 11:47:48,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:48,839 INFO L225 Difference]: With dead ends: 6926 [2021-12-22 11:47:48,839 INFO L226 Difference]: Without dead ends: 4772 [2021-12-22 11:47:48,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:47:48,843 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 96 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 402 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 [2021-12-22 11:47:48,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 402 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:48,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4772 states. [2021-12-22 11:47:49,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4772 to 4770. [2021-12-22 11:47:49,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4770 states, 4769 states have (on average 1.5848186202558188) internal successors, (7558), 4769 states have internal predecessors, (7558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:49,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4770 states to 4770 states and 7558 transitions. [2021-12-22 11:47:49,080 INFO L78 Accepts]: Start accepts. Automaton has 4770 states and 7558 transitions. Word has length 66 [2021-12-22 11:47:49,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:49,080 INFO L470 AbstractCegarLoop]: Abstraction has 4770 states and 7558 transitions. [2021-12-22 11:47:49,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:49,080 INFO L276 IsEmpty]: Start isEmpty. Operand 4770 states and 7558 transitions. [2021-12-22 11:47:49,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 11:47:49,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:49,082 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:47:49,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 11:47:49,082 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:49,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:49,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1715532573, now seen corresponding path program 1 times [2021-12-22 11:47:49,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:49,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982220409] [2021-12-22 11:47:49,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:49,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:49,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:49,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:49,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:49,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982220409] [2021-12-22 11:47:49,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982220409] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:49,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:49,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:47:49,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309616713] [2021-12-22 11:47:49,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:49,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:47:49,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:49,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:47:49,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:47:49,130 INFO L87 Difference]: Start difference. First operand 4770 states and 7558 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:49,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:49,414 INFO L93 Difference]: Finished difference Result 10466 states and 16644 transitions. [2021-12-22 11:47:49,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:47:49,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2021-12-22 11:47:49,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:49,440 INFO L225 Difference]: With dead ends: 10466 [2021-12-22 11:47:49,441 INFO L226 Difference]: Without dead ends: 7109 [2021-12-22 11:47:49,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:47:49,447 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 102 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 431 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 [2021-12-22 11:47:49,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 431 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:49,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7109 states. [2021-12-22 11:47:49,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7109 to 7107. [2021-12-22 11:47:49,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7107 states, 7106 states have (on average 1.5757106670419363) internal successors, (11197), 7106 states have internal predecessors, (11197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:49,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7107 states to 7107 states and 11197 transitions. [2021-12-22 11:47:49,751 INFO L78 Accepts]: Start accepts. Automaton has 7107 states and 11197 transitions. Word has length 66 [2021-12-22 11:47:49,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:49,752 INFO L470 AbstractCegarLoop]: Abstraction has 7107 states and 11197 transitions. [2021-12-22 11:47:49,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:49,752 INFO L276 IsEmpty]: Start isEmpty. Operand 7107 states and 11197 transitions. [2021-12-22 11:47:49,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 11:47:49,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:49,753 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:47:49,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 11:47:49,754 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:49,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:49,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1204542386, now seen corresponding path program 1 times [2021-12-22 11:47:49,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:49,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079131526] [2021-12-22 11:47:49,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:49,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:49,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:49,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079131526] [2021-12-22 11:47:49,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079131526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:49,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:49,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:47:49,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798775326] [2021-12-22 11:47:49,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:49,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:47:49,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:49,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:47:49,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:47:49,786 INFO L87 Difference]: Start difference. First operand 7107 states and 11197 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:50,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:50,146 INFO L93 Difference]: Finished difference Result 15863 states and 25260 transitions. [2021-12-22 11:47:50,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:47:50,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2021-12-22 11:47:50,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:50,169 INFO L225 Difference]: With dead ends: 15863 [2021-12-22 11:47:50,169 INFO L226 Difference]: Without dead ends: 10685 [2021-12-22 11:47:50,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:47:50,176 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 108 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 452 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 [2021-12-22 11:47:50,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 452 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:50,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10685 states. [2021-12-22 11:47:50,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10685 to 10683. [2021-12-22 11:47:50,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10683 states, 10682 states have (on average 1.5719902639955066) internal successors, (16792), 10682 states have internal predecessors, (16792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:50,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10683 states to 10683 states and 16792 transitions. [2021-12-22 11:47:50,686 INFO L78 Accepts]: Start accepts. Automaton has 10683 states and 16792 transitions. Word has length 66 [2021-12-22 11:47:50,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:50,687 INFO L470 AbstractCegarLoop]: Abstraction has 10683 states and 16792 transitions. [2021-12-22 11:47:50,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:50,687 INFO L276 IsEmpty]: Start isEmpty. Operand 10683 states and 16792 transitions. [2021-12-22 11:47:50,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 11:47:50,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:50,688 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] [2021-12-22 11:47:50,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 11:47:50,688 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:50,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:50,689 INFO L85 PathProgramCache]: Analyzing trace with hash 760246741, now seen corresponding path program 1 times [2021-12-22 11:47:50,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:50,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864102450] [2021-12-22 11:47:50,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:50,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:50,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:50,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864102450] [2021-12-22 11:47:50,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864102450] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:50,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:50,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:47:50,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332609616] [2021-12-22 11:47:50,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:50,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:47:50,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:50,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:47:50,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:47:50,802 INFO L87 Difference]: Start difference. First operand 10683 states and 16792 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:51,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:51,301 INFO L93 Difference]: Finished difference Result 21295 states and 33486 transitions. [2021-12-22 11:47:51,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:47:51,302 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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 68 [2021-12-22 11:47:51,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:51,328 INFO L225 Difference]: With dead ends: 21295 [2021-12-22 11:47:51,328 INFO L226 Difference]: Without dead ends: 10685 [2021-12-22 11:47:51,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:47:51,344 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 362 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:47:51,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 526 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:51,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10685 states. [2021-12-22 11:47:51,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10685 to 10683. [2021-12-22 11:47:51,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10683 states, 10682 states have (on average 1.5602883355176933) internal successors, (16667), 10682 states have internal predecessors, (16667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:51,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10683 states to 10683 states and 16667 transitions. [2021-12-22 11:47:51,824 INFO L78 Accepts]: Start accepts. Automaton has 10683 states and 16667 transitions. Word has length 68 [2021-12-22 11:47:51,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:51,824 INFO L470 AbstractCegarLoop]: Abstraction has 10683 states and 16667 transitions. [2021-12-22 11:47:51,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:51,825 INFO L276 IsEmpty]: Start isEmpty. Operand 10683 states and 16667 transitions. [2021-12-22 11:47:51,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-22 11:47:51,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:51,825 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] [2021-12-22 11:47:51,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 11:47:51,826 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:51,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:51,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1443931136, now seen corresponding path program 1 times [2021-12-22 11:47:51,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:51,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801105935] [2021-12-22 11:47:51,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:51,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:51,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:51,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:51,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801105935] [2021-12-22 11:47:51,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801105935] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:51,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:51,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:47:51,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827309232] [2021-12-22 11:47:51,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:51,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:47:51,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:51,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:47:51,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:47:51,917 INFO L87 Difference]: Start difference. First operand 10683 states and 16667 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:52,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:52,571 INFO L93 Difference]: Finished difference Result 30609 states and 47906 transitions. [2021-12-22 11:47:52,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:47:52,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 71 [2021-12-22 11:47:52,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:52,614 INFO L225 Difference]: With dead ends: 30609 [2021-12-22 11:47:52,614 INFO L226 Difference]: Without dead ends: 19999 [2021-12-22 11:47:52,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:47:52,629 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 356 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:47:52,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 528 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:52,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19999 states. [2021-12-22 11:47:53,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19999 to 19997. [2021-12-22 11:47:53,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19997 states, 19996 states have (on average 1.5477095419083817) internal successors, (30948), 19996 states have internal predecessors, (30948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:53,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19997 states to 19997 states and 30948 transitions. [2021-12-22 11:47:53,604 INFO L78 Accepts]: Start accepts. Automaton has 19997 states and 30948 transitions. Word has length 71 [2021-12-22 11:47:53,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:53,604 INFO L470 AbstractCegarLoop]: Abstraction has 19997 states and 30948 transitions. [2021-12-22 11:47:53,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:53,604 INFO L276 IsEmpty]: Start isEmpty. Operand 19997 states and 30948 transitions. [2021-12-22 11:47:53,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-22 11:47:53,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:53,605 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] [2021-12-22 11:47:53,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 11:47:53,605 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:53,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:53,606 INFO L85 PathProgramCache]: Analyzing trace with hash 2054199358, now seen corresponding path program 1 times [2021-12-22 11:47:53,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:53,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409489956] [2021-12-22 11:47:53,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:53,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:53,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:53,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409489956] [2021-12-22 11:47:53,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409489956] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:53,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:53,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:47:53,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411293818] [2021-12-22 11:47:53,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:53,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:47:53,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:53,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:47:53,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:47:53,679 INFO L87 Difference]: Start difference. First operand 19997 states and 30948 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:54,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:54,950 INFO L93 Difference]: Finished difference Result 39185 states and 60002 transitions. [2021-12-22 11:47:54,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 11:47:54,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 72 [2021-12-22 11:47:54,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:55,017 INFO L225 Difference]: With dead ends: 39185 [2021-12-22 11:47:55,017 INFO L226 Difference]: Without dead ends: 39183 [2021-12-22 11:47:55,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:47:55,028 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 323 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:47:55,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 842 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:55,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39183 states. [2021-12-22 11:47:55,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39183 to 21083. [2021-12-22 11:47:56,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21083 states, 21082 states have (on average 1.5190683995825822) internal successors, (32025), 21082 states have internal predecessors, (32025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:56,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21083 states to 21083 states and 32025 transitions. [2021-12-22 11:47:56,061 INFO L78 Accepts]: Start accepts. Automaton has 21083 states and 32025 transitions. Word has length 72 [2021-12-22 11:47:56,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:56,061 INFO L470 AbstractCegarLoop]: Abstraction has 21083 states and 32025 transitions. [2021-12-22 11:47:56,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:56,062 INFO L276 IsEmpty]: Start isEmpty. Operand 21083 states and 32025 transitions. [2021-12-22 11:47:56,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-22 11:47:56,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:56,064 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:47:56,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 11:47:56,064 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:56,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:56,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1220786708, now seen corresponding path program 1 times [2021-12-22 11:47:56,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:56,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20480822] [2021-12-22 11:47:56,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:56,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 11:47:56,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:56,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20480822] [2021-12-22 11:47:56,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20480822] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:56,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:56,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:47:56,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800160208] [2021-12-22 11:47:56,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:56,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:47:56,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:56,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:47:56,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:47:56,148 INFO L87 Difference]: Start difference. First operand 21083 states and 32025 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:57,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:57,809 INFO L93 Difference]: Finished difference Result 51593 states and 78687 transitions. [2021-12-22 11:47:57,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:47:57,810 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 99 [2021-12-22 11:47:57,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:57,882 INFO L225 Difference]: With dead ends: 51593 [2021-12-22 11:47:57,882 INFO L226 Difference]: Without dead ends: 41591 [2021-12-22 11:47:57,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:47:57,906 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 463 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:47:57,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 822 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:57,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41591 states. [2021-12-22 11:47:59,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41591 to 32423. [2021-12-22 11:47:59,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32423 states, 32422 states have (on average 1.518074147184011) internal successors, (49219), 32422 states have internal predecessors, (49219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:59,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32423 states to 32423 states and 49219 transitions. [2021-12-22 11:47:59,318 INFO L78 Accepts]: Start accepts. Automaton has 32423 states and 49219 transitions. Word has length 99 [2021-12-22 11:47:59,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:59,319 INFO L470 AbstractCegarLoop]: Abstraction has 32423 states and 49219 transitions. [2021-12-22 11:47:59,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:59,319 INFO L276 IsEmpty]: Start isEmpty. Operand 32423 states and 49219 transitions. [2021-12-22 11:47:59,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-22 11:47:59,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:59,320 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:47:59,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 11:47:59,321 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:59,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:59,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1736711163, now seen corresponding path program 1 times [2021-12-22 11:47:59,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:59,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918670834] [2021-12-22 11:47:59,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:59,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 11:47:59,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:59,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918670834] [2021-12-22 11:47:59,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918670834] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:59,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:59,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:47:59,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030242674] [2021-12-22 11:47:59,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:59,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:47:59,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:59,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:47:59,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:47:59,448 INFO L87 Difference]: Start difference. First operand 32423 states and 49219 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:00,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:48:00,990 INFO L93 Difference]: Finished difference Result 55601 states and 84823 transitions. [2021-12-22 11:48:00,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:48:00,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 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 99 [2021-12-22 11:48:00,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:48:01,061 INFO L225 Difference]: With dead ends: 55601 [2021-12-22 11:48:01,061 INFO L226 Difference]: Without dead ends: 45599 [2021-12-22 11:48:01,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:48:01,091 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 454 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:48:01,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 942 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:48:01,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45599 states. [2021-12-22 11:48:02,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45599 to 43945. [2021-12-22 11:48:02,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43945 states, 43944 states have (on average 1.519229018751138) internal successors, (66761), 43944 states have internal predecessors, (66761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:02,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43945 states to 43945 states and 66761 transitions. [2021-12-22 11:48:02,769 INFO L78 Accepts]: Start accepts. Automaton has 43945 states and 66761 transitions. Word has length 99 [2021-12-22 11:48:02,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:48:02,770 INFO L470 AbstractCegarLoop]: Abstraction has 43945 states and 66761 transitions. [2021-12-22 11:48:02,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:02,770 INFO L276 IsEmpty]: Start isEmpty. Operand 43945 states and 66761 transitions. [2021-12-22 11:48:02,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-22 11:48:02,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:48:02,773 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:48:02,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 11:48:02,773 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:48:02,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:48:02,774 INFO L85 PathProgramCache]: Analyzing trace with hash 361818826, now seen corresponding path program 1 times [2021-12-22 11:48:02,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:48:02,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052448096] [2021-12-22 11:48:02,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:48:02,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:48:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:48:02,831 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:48:02,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:48:02,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052448096] [2021-12-22 11:48:02,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052448096] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:48:02,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:48:02,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:48:02,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137136732] [2021-12-22 11:48:02,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:48:02,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:48:02,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:48:02,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:48:02,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:48:02,833 INFO L87 Difference]: Start difference. First operand 43945 states and 66761 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:04,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:48:04,958 INFO L93 Difference]: Finished difference Result 62437 states and 95433 transitions. [2021-12-22 11:48:04,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:48:04,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-12-22 11:48:04,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:48:05,043 INFO L225 Difference]: With dead ends: 62437 [2021-12-22 11:48:05,043 INFO L226 Difference]: Without dead ends: 52175 [2021-12-22 11:48:05,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:48:05,073 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 454 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:48:05,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 891 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:48:05,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52175 states. [2021-12-22 11:48:07,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52175 to 50521. [2021-12-22 11:48:07,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50521 states, 50520 states have (on average 1.5221892319873318) internal successors, (76901), 50520 states have internal predecessors, (76901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:07,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50521 states to 50521 states and 76901 transitions. [2021-12-22 11:48:07,253 INFO L78 Accepts]: Start accepts. Automaton has 50521 states and 76901 transitions. Word has length 99 [2021-12-22 11:48:07,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:48:07,254 INFO L470 AbstractCegarLoop]: Abstraction has 50521 states and 76901 transitions. [2021-12-22 11:48:07,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:07,254 INFO L276 IsEmpty]: Start isEmpty. Operand 50521 states and 76901 transitions. [2021-12-22 11:48:07,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-22 11:48:07,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:48:07,256 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:48:07,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 11:48:07,256 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:48:07,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:48:07,257 INFO L85 PathProgramCache]: Analyzing trace with hash 703616354, now seen corresponding path program 1 times [2021-12-22 11:48:07,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:48:07,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427731503] [2021-12-22 11:48:07,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:48:07,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:48:07,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:48:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:48:07,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:48:07,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427731503] [2021-12-22 11:48:07,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427731503] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:48:07,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:48:07,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:48:07,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123406411] [2021-12-22 11:48:07,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:48:07,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:48:07,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:48:07,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:48:07,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:48:07,310 INFO L87 Difference]: Start difference. First operand 50521 states and 76901 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:09,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:48:09,875 INFO L93 Difference]: Finished difference Result 82494 states and 126290 transitions. [2021-12-22 11:48:09,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:48:09,876 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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 100 [2021-12-22 11:48:09,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:48:09,977 INFO L225 Difference]: With dead ends: 82494 [2021-12-22 11:48:09,978 INFO L226 Difference]: Without dead ends: 65656 [2021-12-22 11:48:09,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:48:09,996 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 195 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:48:09,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 664 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:48:10,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65656 states. [2021-12-22 11:48:12,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65656 to 64004. [2021-12-22 11:48:12,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64004 states, 64003 states have (on average 1.5227254972423168) internal successors, (97459), 64003 states have internal predecessors, (97459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:12,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64004 states to 64004 states and 97459 transitions. [2021-12-22 11:48:12,636 INFO L78 Accepts]: Start accepts. Automaton has 64004 states and 97459 transitions. Word has length 100 [2021-12-22 11:48:12,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:48:12,637 INFO L470 AbstractCegarLoop]: Abstraction has 64004 states and 97459 transitions. [2021-12-22 11:48:12,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:12,637 INFO L276 IsEmpty]: Start isEmpty. Operand 64004 states and 97459 transitions. [2021-12-22 11:48:12,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-22 11:48:12,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:48:12,639 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:48:12,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 11:48:12,639 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:48:12,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:48:12,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1126318180, now seen corresponding path program 1 times [2021-12-22 11:48:12,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:48:12,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345759850] [2021-12-22 11:48:12,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:48:12,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:48:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:48:12,676 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:48:12,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:48:12,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345759850] [2021-12-22 11:48:12,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345759850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:48:12,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:48:12,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:48:12,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018329134] [2021-12-22 11:48:12,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:48:12,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:48:12,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:48:12,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:48:12,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:48:12,679 INFO L87 Difference]: Start difference. First operand 64004 states and 97459 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:16,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:48:16,663 INFO L93 Difference]: Finished difference Result 138461 states and 211669 transitions. [2021-12-22 11:48:16,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:48:16,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 100 [2021-12-22 11:48:16,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:48:16,850 INFO L225 Difference]: With dead ends: 138461 [2021-12-22 11:48:16,851 INFO L226 Difference]: Without dead ends: 108269 [2021-12-22 11:48:16,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:48:16,885 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 85 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:48:16,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 355 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:48:16,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108269 states. [2021-12-22 11:48:21,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108269 to 107991. [2021-12-22 11:48:21,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107991 states, 107990 states have (on average 1.5230299101768683) internal successors, (164472), 107990 states have internal predecessors, (164472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:21,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107991 states to 107991 states and 164472 transitions. [2021-12-22 11:48:21,604 INFO L78 Accepts]: Start accepts. Automaton has 107991 states and 164472 transitions. Word has length 100 [2021-12-22 11:48:21,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:48:21,605 INFO L470 AbstractCegarLoop]: Abstraction has 107991 states and 164472 transitions. [2021-12-22 11:48:21,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:21,605 INFO L276 IsEmpty]: Start isEmpty. Operand 107991 states and 164472 transitions. [2021-12-22 11:48:21,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-22 11:48:21,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:48:21,608 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:48:21,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 11:48:21,608 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:48:21,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:48:21,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1300018162, now seen corresponding path program 1 times [2021-12-22 11:48:21,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:48:21,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548533367] [2021-12-22 11:48:21,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:48:21,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:48:21,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:48:21,653 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 11:48:21,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:48:21,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548533367] [2021-12-22 11:48:21,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548533367] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:48:21,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:48:21,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:48:21,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920570746] [2021-12-22 11:48:21,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:48:21,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:48:21,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:48:21,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:48:21,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:48:21,656 INFO L87 Difference]: Start difference. First operand 107991 states and 164472 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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)