./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label55.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/eca-rers2012/Problem13_label55.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 e6db237e0e3a7433c307944ca0a7f57b3986dfc7d27b25cb31c2bd3c24bb8b17 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:47:52,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:47:52,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:47:52,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:47:52,269 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:47:52,272 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:47:52,274 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:47:52,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:47:52,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:47:52,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:47:52,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:47:52,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:47:52,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:47:52,286 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:47:52,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:47:52,288 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:47:52,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:47:52,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:47:52,291 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:47:52,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:47:52,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:47:52,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:47:52,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:47:52,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:47:52,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:47:52,301 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:47:52,302 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:47:52,303 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:47:52,303 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:47:52,304 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:47:52,304 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:47:52,305 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:47:52,307 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:47:52,308 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:47:52,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:47:52,309 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:47:52,310 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:47:52,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:47:52,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:47:52,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:47:52,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:47:52,313 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:47:52,341 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:47:52,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:47:52,341 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:47:52,341 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:47:52,341 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:47:52,342 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:47:52,342 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:47:52,342 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:47:52,342 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:47:52,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:47:52,342 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:47:52,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:47:52,343 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:47:52,343 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:47:52,343 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:47:52,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:47:52,343 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:47:52,343 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:47:52,343 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:47:52,343 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:47:52,344 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:47:52,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:47:52,344 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:47:52,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:47:52,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:47:52,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:47:52,345 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:47:52,345 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:47:52,345 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:47:52,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:47:52,345 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:47:52,346 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:47:52,346 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:47:52,346 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:47:52,346 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6db237e0e3a7433c307944ca0a7f57b3986dfc7d27b25cb31c2bd3c24bb8b17 [2021-12-15 22:47:52,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:47:52,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:47:52,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:47:52,614 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:47:52,614 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:47:52,615 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label55.c [2021-12-15 22:47:52,684 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ae57efeb/377d180b2643469b9a3088b92d0c42d4/FLAG8421eeae2 [2021-12-15 22:47:53,362 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:47:53,363 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label55.c [2021-12-15 22:47:53,393 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ae57efeb/377d180b2643469b9a3088b92d0c42d4/FLAG8421eeae2 [2021-12-15 22:47:53,735 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ae57efeb/377d180b2643469b9a3088b92d0c42d4 [2021-12-15 22:47:53,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:47:53,739 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:47:53,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:47:53,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:47:53,744 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:47:53,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:47:53" (1/1) ... [2021-12-15 22:47:53,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14c285bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:53, skipping insertion in model container [2021-12-15 22:47:53,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:47:53" (1/1) ... [2021-12-15 22:47:53,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:47:53,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:47:54,169 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/eca-rers2012/Problem13_label55.c[6865,6878] [2021-12-15 22:47:54,897 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:47:54,904 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:47:54,935 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/eca-rers2012/Problem13_label55.c[6865,6878] [2021-12-15 22:47:55,386 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:47:55,407 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:47:55,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:55 WrapperNode [2021-12-15 22:47:55,409 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:47:55,410 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:47:55,410 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:47:55,410 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:47:55,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:55" (1/1) ... [2021-12-15 22:47:55,489 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:55" (1/1) ... [2021-12-15 22:47:56,092 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-15 22:47:56,092 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:47:56,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:47:56,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:47:56,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:47:56,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:55" (1/1) ... [2021-12-15 22:47:56,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:55" (1/1) ... [2021-12-15 22:47:56,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:55" (1/1) ... [2021-12-15 22:47:56,191 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:55" (1/1) ... [2021-12-15 22:47:56,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:55" (1/1) ... [2021-12-15 22:47:56,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:55" (1/1) ... [2021-12-15 22:47:56,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:55" (1/1) ... [2021-12-15 22:47:56,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:47:56,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:47:56,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:47:56,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:47:56,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:55" (1/1) ... [2021-12-15 22:47:56,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:47:56,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:47:56,645 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) [2021-12-15 22:47:56,659 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 [2021-12-15 22:47:56,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:47:56,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:47:56,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:47:56,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:47:56,765 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:47:56,767 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:48:01,016 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:48:01,042 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:48:01,043 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:48:01,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:48:01 BoogieIcfgContainer [2021-12-15 22:48:01,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:48:01,048 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:48:01,049 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:48:01,051 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:48:01,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:47:53" (1/3) ... [2021-12-15 22:48:01,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@729cccfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:48:01, skipping insertion in model container [2021-12-15 22:48:01,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:55" (2/3) ... [2021-12-15 22:48:01,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@729cccfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:48:01, skipping insertion in model container [2021-12-15 22:48:01,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:48:01" (3/3) ... [2021-12-15 22:48:01,054 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label55.c [2021-12-15 22:48:01,058 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:48:01,059 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:48:01,120 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:48:01,126 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 [2021-12-15 22:48:01,126 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:48:01,162 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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) [2021-12-15 22:48:01,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-15 22:48:01,173 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:01,173 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] [2021-12-15 22:48:01,174 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:01,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:01,179 INFO L85 PathProgramCache]: Analyzing trace with hash 563919826, now seen corresponding path program 1 times [2021-12-15 22:48:01,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:01,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899456831] [2021-12-15 22:48:01,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:01,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:48:01,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:01,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899456831] [2021-12-15 22:48:01,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899456831] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:01,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:48:01,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:48:01,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132564759] [2021-12-15 22:48:01,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:01,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:48:01,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:01,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:48:01,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:01,466 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 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) [2021-12-15 22:48:05,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:05,471 INFO L93 Difference]: Finished difference Result 3035 states and 5643 transitions. [2021-12-15 22:48:05,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:48:05,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 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 48 [2021-12-15 22:48:05,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:05,499 INFO L225 Difference]: With dead ends: 3035 [2021-12-15 22:48:05,500 INFO L226 Difference]: Without dead ends: 1873 [2021-12-15 22:48:05,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:05,508 INFO L933 BasicCegarLoop]: 991 mSDtfsCounter, 857 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2505 mSolverCounterSat, 858 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 3363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 858 IncrementalHoareTripleChecker+Valid, 2505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:05,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 1145 Invalid, 3363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [858 Valid, 2505 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-15 22:48:05,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2021-12-15 22:48:05,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1859. [2021-12-15 22:48:05,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 1.5441334768568353) internal successors, (2869), 1858 states have internal predecessors, (2869), 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) [2021-12-15 22:48:05,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 2869 transitions. [2021-12-15 22:48:05,624 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 2869 transitions. Word has length 48 [2021-12-15 22:48:05,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:05,625 INFO L470 AbstractCegarLoop]: Abstraction has 1859 states and 2869 transitions. [2021-12-15 22:48:05,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 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) [2021-12-15 22:48:05,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 2869 transitions. [2021-12-15 22:48:05,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-15 22:48:05,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:05,630 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:48:05,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:48:05,631 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:05,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:05,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1576356061, now seen corresponding path program 1 times [2021-12-15 22:48:05,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:05,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013042250] [2021-12-15 22:48:05,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:05,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:05,795 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:48:05,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:05,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013042250] [2021-12-15 22:48:05,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013042250] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:05,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:48:05,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:48:05,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670618770] [2021-12-15 22:48:05,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:05,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:48:05,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:05,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:48:05,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:05,801 INFO L87 Difference]: Start difference. First operand 1859 states and 2869 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 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) [2021-12-15 22:48:10,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:10,240 INFO L93 Difference]: Finished difference Result 5405 states and 8404 transitions. [2021-12-15 22:48:10,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:48:10,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 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 120 [2021-12-15 22:48:10,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:10,259 INFO L225 Difference]: With dead ends: 5405 [2021-12-15 22:48:10,259 INFO L226 Difference]: Without dead ends: 3548 [2021-12-15 22:48:10,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:10,265 INFO L933 BasicCegarLoop]: 906 mSDtfsCounter, 863 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 3343 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 1039 SdHoareTripleChecker+Invalid, 3785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 3343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:10,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [863 Valid, 1039 Invalid, 3785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 3343 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 22:48:10,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3548 states. [2021-12-15 22:48:10,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3548 to 3476. [2021-12-15 22:48:10,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3476 states, 3475 states have (on average 1.4900719424460431) internal successors, (5178), 3475 states have internal predecessors, (5178), 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) [2021-12-15 22:48:10,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3476 states to 3476 states and 5178 transitions. [2021-12-15 22:48:10,335 INFO L78 Accepts]: Start accepts. Automaton has 3476 states and 5178 transitions. Word has length 120 [2021-12-15 22:48:10,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:10,338 INFO L470 AbstractCegarLoop]: Abstraction has 3476 states and 5178 transitions. [2021-12-15 22:48:10,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 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) [2021-12-15 22:48:10,339 INFO L276 IsEmpty]: Start isEmpty. Operand 3476 states and 5178 transitions. [2021-12-15 22:48:10,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-15 22:48:10,348 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:10,349 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:48:10,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:48:10,352 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:10,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:10,353 INFO L85 PathProgramCache]: Analyzing trace with hash 759088556, now seen corresponding path program 1 times [2021-12-15 22:48:10,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:10,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078025269] [2021-12-15 22:48:10,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:10,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:10,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:48:10,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:10,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078025269] [2021-12-15 22:48:10,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078025269] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:10,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:48:10,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:48:10,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547585236] [2021-12-15 22:48:10,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:10,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:48:10,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:10,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:48:10,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:10,471 INFO L87 Difference]: Start difference. First operand 3476 states and 5178 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:13,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:13,710 INFO L93 Difference]: Finished difference Result 10142 states and 15132 transitions. [2021-12-15 22:48:13,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:48:13,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-12-15 22:48:13,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:13,736 INFO L225 Difference]: With dead ends: 10142 [2021-12-15 22:48:13,737 INFO L226 Difference]: Without dead ends: 6668 [2021-12-15 22:48:13,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:13,743 INFO L933 BasicCegarLoop]: 714 mSDtfsCounter, 962 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2532 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 3307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 2532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:13,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [962 Valid, 850 Invalid, 3307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 2532 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-15 22:48:13,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6668 states. [2021-12-15 22:48:13,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6668 to 6659. [2021-12-15 22:48:13,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6659 states, 6658 states have (on average 1.364674076299189) internal successors, (9086), 6658 states have internal predecessors, (9086), 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) [2021-12-15 22:48:13,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6659 states to 6659 states and 9086 transitions. [2021-12-15 22:48:13,871 INFO L78 Accepts]: Start accepts. Automaton has 6659 states and 9086 transitions. Word has length 134 [2021-12-15 22:48:13,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:13,873 INFO L470 AbstractCegarLoop]: Abstraction has 6659 states and 9086 transitions. [2021-12-15 22:48:13,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:48:13,874 INFO L276 IsEmpty]: Start isEmpty. Operand 6659 states and 9086 transitions. [2021-12-15 22:48:13,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-15 22:48:13,877 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:13,877 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:48:13,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:48:13,878 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:13,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:13,879 INFO L85 PathProgramCache]: Analyzing trace with hash -2129171586, now seen corresponding path program 1 times [2021-12-15 22:48:13,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:13,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961117902] [2021-12-15 22:48:13,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:13,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:48:14,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:14,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961117902] [2021-12-15 22:48:14,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961117902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:14,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:48:14,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:48:14,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992458497] [2021-12-15 22:48:14,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:14,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:48:14,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:14,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:48:14,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:14,016 INFO L87 Difference]: Start difference. First operand 6659 states and 9086 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 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) [2021-12-15 22:48:16,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:16,725 INFO L93 Difference]: Finished difference Result 14110 states and 19034 transitions. [2021-12-15 22:48:16,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:48:16,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 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 137 [2021-12-15 22:48:16,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:16,750 INFO L225 Difference]: With dead ends: 14110 [2021-12-15 22:48:16,750 INFO L226 Difference]: Without dead ends: 7453 [2021-12-15 22:48:16,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:16,770 INFO L933 BasicCegarLoop]: 1047 mSDtfsCounter, 707 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2568 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 2597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:16,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [707 Valid, 1176 Invalid, 2597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2568 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 22:48:16,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7453 states. [2021-12-15 22:48:16,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7453 to 7446. [2021-12-15 22:48:16,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7446 states, 7445 states have (on average 1.3308260577568838) internal successors, (9908), 7445 states have internal predecessors, (9908), 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) [2021-12-15 22:48:16,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7446 states to 7446 states and 9908 transitions. [2021-12-15 22:48:16,920 INFO L78 Accepts]: Start accepts. Automaton has 7446 states and 9908 transitions. Word has length 137 [2021-12-15 22:48:16,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:16,921 INFO L470 AbstractCegarLoop]: Abstraction has 7446 states and 9908 transitions. [2021-12-15 22:48:16,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 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) [2021-12-15 22:48:16,922 INFO L276 IsEmpty]: Start isEmpty. Operand 7446 states and 9908 transitions. [2021-12-15 22:48:16,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-15 22:48:16,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:16,923 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:48:16,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:48:16,924 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:16,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:16,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1786046765, now seen corresponding path program 1 times [2021-12-15 22:48:16,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:16,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243911684] [2021-12-15 22:48:16,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:16,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:17,078 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:48:17,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:17,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243911684] [2021-12-15 22:48:17,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243911684] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:17,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:48:17,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:48:17,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747864981] [2021-12-15 22:48:17,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:17,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:48:17,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:17,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:48:17,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:17,081 INFO L87 Difference]: Start difference. First operand 7446 states and 9908 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2021-12-15 22:48:20,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:20,239 INFO L93 Difference]: Finished difference Result 17275 states and 24006 transitions. [2021-12-15 22:48:20,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:48:20,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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 144 [2021-12-15 22:48:20,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:20,280 INFO L225 Difference]: With dead ends: 17275 [2021-12-15 22:48:20,280 INFO L226 Difference]: Without dead ends: 10618 [2021-12-15 22:48:20,291 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 [2021-12-15 22:48:20,292 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 909 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2406 mSolverCounterSat, 901 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 3307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 901 IncrementalHoareTripleChecker+Valid, 2406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:20,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [909 Valid, 1000 Invalid, 3307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [901 Valid, 2406 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 22:48:20,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10618 states. [2021-12-15 22:48:20,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10618 to 10608. [2021-12-15 22:48:20,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10608 states, 10607 states have (on average 1.3128122937682662) internal successors, (13925), 10607 states have internal predecessors, (13925), 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) [2021-12-15 22:48:20,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10608 states to 10608 states and 13925 transitions. [2021-12-15 22:48:20,559 INFO L78 Accepts]: Start accepts. Automaton has 10608 states and 13925 transitions. Word has length 144 [2021-12-15 22:48:20,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:20,560 INFO L470 AbstractCegarLoop]: Abstraction has 10608 states and 13925 transitions. [2021-12-15 22:48:20,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2021-12-15 22:48:20,564 INFO L276 IsEmpty]: Start isEmpty. Operand 10608 states and 13925 transitions. [2021-12-15 22:48:20,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-15 22:48:20,566 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:20,566 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:48:20,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:48:20,567 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:20,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:20,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1426410870, now seen corresponding path program 1 times [2021-12-15 22:48:20,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:20,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366122426] [2021-12-15 22:48:20,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:20,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:20,810 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:48:20,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:20,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366122426] [2021-12-15 22:48:20,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366122426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:20,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:48:20,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:48:20,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934949381] [2021-12-15 22:48:20,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:20,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 22:48:20,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:20,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 22:48:20,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:48:20,813 INFO L87 Difference]: Start difference. First operand 10608 states and 13925 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 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) [2021-12-15 22:48:24,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:24,788 INFO L93 Difference]: Finished difference Result 20468 states and 27067 transitions. [2021-12-15 22:48:24,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 22:48:24,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 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 153 [2021-12-15 22:48:24,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:24,804 INFO L225 Difference]: With dead ends: 20468 [2021-12-15 22:48:24,805 INFO L226 Difference]: Without dead ends: 10649 [2021-12-15 22:48:24,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:48:24,814 INFO L933 BasicCegarLoop]: 1095 mSDtfsCounter, 2252 mSDsluCounter, 1549 mSDsCounter, 0 mSdLazyCounter, 4602 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2252 SdHoareTripleChecker+Valid, 2644 SdHoareTripleChecker+Invalid, 4804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 4602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:24,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2252 Valid, 2644 Invalid, 4804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 4602 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-15 22:48:24,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10649 states. [2021-12-15 22:48:24,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10649 to 10608. [2021-12-15 22:48:24,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10608 states, 10607 states have (on average 1.309983972848119) internal successors, (13895), 10607 states have internal predecessors, (13895), 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) [2021-12-15 22:48:24,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10608 states to 10608 states and 13895 transitions. [2021-12-15 22:48:24,946 INFO L78 Accepts]: Start accepts. Automaton has 10608 states and 13895 transitions. Word has length 153 [2021-12-15 22:48:24,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:24,946 INFO L470 AbstractCegarLoop]: Abstraction has 10608 states and 13895 transitions. [2021-12-15 22:48:24,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 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) [2021-12-15 22:48:24,947 INFO L276 IsEmpty]: Start isEmpty. Operand 10608 states and 13895 transitions. [2021-12-15 22:48:24,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-12-15 22:48:24,949 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:24,949 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:48:24,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:48:24,950 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:24,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:24,951 INFO L85 PathProgramCache]: Analyzing trace with hash 2068784217, now seen corresponding path program 1 times [2021-12-15 22:48:24,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:24,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311534332] [2021-12-15 22:48:24,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:24,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 91 proven. 25 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-15 22:48:25,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:25,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311534332] [2021-12-15 22:48:25,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311534332] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:48:25,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051983689] [2021-12-15 22:48:25,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:25,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:48:25,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:48:25,071 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:48:25,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 22:48:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:25,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:48:25,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:48:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-15 22:48:25,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:48:25,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051983689] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:25,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:48:25,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 22:48:25,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945351173] [2021-12-15 22:48:25,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:25,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:48:25,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:25,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:48:25,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:48:25,616 INFO L87 Difference]: Start difference. First operand 10608 states and 13895 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 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) [2021-12-15 22:48:29,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:29,076 INFO L93 Difference]: Finished difference Result 30035 states and 39830 transitions. [2021-12-15 22:48:29,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:48:29,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 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 209 [2021-12-15 22:48:29,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:29,109 INFO L225 Difference]: With dead ends: 30035 [2021-12-15 22:48:29,110 INFO L226 Difference]: Without dead ends: 20216 [2021-12-15 22:48:29,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:48:29,128 INFO L933 BasicCegarLoop]: 1136 mSDtfsCounter, 1053 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 2801 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 3338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 2801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:29,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1053 Valid, 1356 Invalid, 3338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 2801 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-15 22:48:29,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20216 states. [2021-12-15 22:48:29,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20216 to 20199. [2021-12-15 22:48:29,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20199 states, 20198 states have (on average 1.251163481532825) internal successors, (25271), 20198 states have internal predecessors, (25271), 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) [2021-12-15 22:48:29,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20199 states to 20199 states and 25271 transitions. [2021-12-15 22:48:29,381 INFO L78 Accepts]: Start accepts. Automaton has 20199 states and 25271 transitions. Word has length 209 [2021-12-15 22:48:29,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:29,461 INFO L470 AbstractCegarLoop]: Abstraction has 20199 states and 25271 transitions. [2021-12-15 22:48:29,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 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) [2021-12-15 22:48:29,462 INFO L276 IsEmpty]: Start isEmpty. Operand 20199 states and 25271 transitions. [2021-12-15 22:48:29,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-12-15 22:48:29,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:29,464 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:48:29,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 22:48:29,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:48:29,665 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:29,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:29,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1823087463, now seen corresponding path program 1 times [2021-12-15 22:48:29,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:29,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474968559] [2021-12-15 22:48:29,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:29,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:29,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-15 22:48:29,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:29,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474968559] [2021-12-15 22:48:29,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474968559] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:29,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:48:29,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:48:29,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076044449] [2021-12-15 22:48:29,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:29,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:48:29,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:29,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:48:29,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:29,791 INFO L87 Difference]: Start difference. First operand 20199 states and 25271 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 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) [2021-12-15 22:48:32,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:32,814 INFO L93 Difference]: Finished difference Result 58495 states and 73519 transitions. [2021-12-15 22:48:32,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:48:32,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 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 229 [2021-12-15 22:48:32,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:32,884 INFO L225 Difference]: With dead ends: 58495 [2021-12-15 22:48:32,884 INFO L226 Difference]: Without dead ends: 39085 [2021-12-15 22:48:32,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:32,911 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 884 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2316 mSolverCounterSat, 874 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 3190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 874 IncrementalHoareTripleChecker+Valid, 2316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:32,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [884 Valid, 1014 Invalid, 3190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [874 Valid, 2316 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 22:48:32,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39085 states. [2021-12-15 22:48:33,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39085 to 35930. [2021-12-15 22:48:33,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35930 states, 35929 states have (on average 1.1823874864315733) internal successors, (42482), 35929 states have internal predecessors, (42482), 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) [2021-12-15 22:48:33,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35930 states to 35930 states and 42482 transitions. [2021-12-15 22:48:33,327 INFO L78 Accepts]: Start accepts. Automaton has 35930 states and 42482 transitions. Word has length 229 [2021-12-15 22:48:33,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:33,328 INFO L470 AbstractCegarLoop]: Abstraction has 35930 states and 42482 transitions. [2021-12-15 22:48:33,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 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) [2021-12-15 22:48:33,328 INFO L276 IsEmpty]: Start isEmpty. Operand 35930 states and 42482 transitions. [2021-12-15 22:48:33,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-12-15 22:48:33,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:33,331 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:48:33,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 22:48:33,332 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:33,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:33,332 INFO L85 PathProgramCache]: Analyzing trace with hash -553029773, now seen corresponding path program 1 times [2021-12-15 22:48:33,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:33,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68521375] [2021-12-15 22:48:33,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:33,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:48:33,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:33,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68521375] [2021-12-15 22:48:33,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68521375] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:33,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:48:33,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:48:33,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115047459] [2021-12-15 22:48:33,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:33,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:48:33,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:33,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:48:33,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:33,426 INFO L87 Difference]: Start difference. First operand 35930 states and 42482 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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) [2021-12-15 22:48:36,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:36,339 INFO L93 Difference]: Finished difference Result 70920 states and 83963 transitions. [2021-12-15 22:48:36,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:48:36,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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 262 [2021-12-15 22:48:36,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:36,399 INFO L225 Difference]: With dead ends: 70920 [2021-12-15 22:48:36,399 INFO L226 Difference]: Without dead ends: 35779 [2021-12-15 22:48:36,431 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 [2021-12-15 22:48:36,433 INFO L933 BasicCegarLoop]: 1504 mSDtfsCounter, 1036 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2350 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 1641 SdHoareTripleChecker+Invalid, 2952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 2350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:36,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1036 Valid, 1641 Invalid, 2952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 2350 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 22:48:36,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35779 states. [2021-12-15 22:48:36,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35779 to 34199. [2021-12-15 22:48:36,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34199 states, 34198 states have (on average 1.129656705070472) internal successors, (38632), 34198 states have internal predecessors, (38632), 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) [2021-12-15 22:48:36,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34199 states to 34199 states and 38632 transitions. [2021-12-15 22:48:36,827 INFO L78 Accepts]: Start accepts. Automaton has 34199 states and 38632 transitions. Word has length 262 [2021-12-15 22:48:36,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:36,828 INFO L470 AbstractCegarLoop]: Abstraction has 34199 states and 38632 transitions. [2021-12-15 22:48:36,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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) [2021-12-15 22:48:36,828 INFO L276 IsEmpty]: Start isEmpty. Operand 34199 states and 38632 transitions. [2021-12-15 22:48:36,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2021-12-15 22:48:36,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:36,836 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:48:36,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 22:48:36,836 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:36,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:36,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1880751536, now seen corresponding path program 1 times [2021-12-15 22:48:36,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:36,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673778678] [2021-12-15 22:48:36,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:36,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-15 22:48:36,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:36,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673778678] [2021-12-15 22:48:36,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673778678] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:36,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:48:36,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:48:36,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000041957] [2021-12-15 22:48:36,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:36,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:48:36,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:36,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:48:36,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:48:36,975 INFO L87 Difference]: Start difference. First operand 34199 states and 38632 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-12-15 22:48:40,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:40,930 INFO L93 Difference]: Finished difference Result 85057 states and 96357 transitions. [2021-12-15 22:48:40,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:48:40,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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 336 [2021-12-15 22:48:40,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:41,015 INFO L225 Difference]: With dead ends: 85057 [2021-12-15 22:48:41,016 INFO L226 Difference]: Without dead ends: 51647 [2021-12-15 22:48:41,045 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 [2021-12-15 22:48:41,045 INFO L933 BasicCegarLoop]: 1754 mSDtfsCounter, 921 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 3120 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 921 SdHoareTripleChecker+Valid, 1872 SdHoareTripleChecker+Invalid, 3697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 3120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:41,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [921 Valid, 1872 Invalid, 3697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 3120 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-15 22:48:41,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51647 states. [2021-12-15 22:48:41,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51647 to 50806. [2021-12-15 22:48:41,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50806 states, 50805 states have (on average 1.1234327329987206) internal successors, (57076), 50805 states have internal predecessors, (57076), 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) [2021-12-15 22:48:41,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50806 states to 50806 states and 57076 transitions. [2021-12-15 22:48:41,621 INFO L78 Accepts]: Start accepts. Automaton has 50806 states and 57076 transitions. Word has length 336 [2021-12-15 22:48:41,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:48:41,622 INFO L470 AbstractCegarLoop]: Abstraction has 50806 states and 57076 transitions. [2021-12-15 22:48:41,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-12-15 22:48:41,623 INFO L276 IsEmpty]: Start isEmpty. Operand 50806 states and 57076 transitions. [2021-12-15 22:48:41,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2021-12-15 22:48:41,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:48:41,629 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:48:41,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 22:48:41,630 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:48:41,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:48:41,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1042265292, now seen corresponding path program 1 times [2021-12-15 22:48:41,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:48:41,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334070571] [2021-12-15 22:48:41,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:48:41,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:48:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:48:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 367 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-15 22:48:41,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:48:41,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334070571] [2021-12-15 22:48:41,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334070571] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:48:41,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:48:41,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:48:41,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382284225] [2021-12-15 22:48:41,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:48:41,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:48:41,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:48:41,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:48:41,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:48:41,739 INFO L87 Difference]: Start difference. First operand 50806 states and 57076 transitions. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 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) [2021-12-15 22:48:47,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:48:47,850 INFO L93 Difference]: Finished difference Result 141966 states and 159784 transitions. [2021-12-15 22:48:47,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:48:47,850 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 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 336 [2021-12-15 22:48:47,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:48:47,986 INFO L225 Difference]: With dead ends: 141966 [2021-12-15 22:48:47,986 INFO L226 Difference]: Without dead ends: 91949 [2021-12-15 22:48:48,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:48:48,035 INFO L933 BasicCegarLoop]: 650 mSDtfsCounter, 1715 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 6044 mSolverCounterSat, 1044 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1715 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 7088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1044 IncrementalHoareTripleChecker+Valid, 6044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:48:48,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1715 Valid, 840 Invalid, 7088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1044 Valid, 6044 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-15 22:48:48,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91949 states. [2021-12-15 22:48:48,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91949 to 89443.