./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label12.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/Problem03_label12.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 8d17ef4c86a3b9aaad0f3756316af6b356203f50f5a16d9fd49cf45964daad71 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:03:22,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:03:22,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:03:22,347 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:03:22,352 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:03:22,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:03:22,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:03:22,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:03:22,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:03:22,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:03:22,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:03:22,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:03:22,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:03:22,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:03:22,367 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:03:22,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:03:22,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:03:22,374 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:03:22,375 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:03:22,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:03:22,377 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:03:22,381 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:03:22,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:03:22,382 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:03:22,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:03:22,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:03:22,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:03:22,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:03:22,387 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:03:22,387 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:03:22,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:03:22,390 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:03:22,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:03:22,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:03:22,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:03:22,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:03:22,392 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:03:22,392 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:03:22,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:03:22,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:03:22,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:03:22,395 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:03:22,414 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:03:22,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:03:22,415 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:03:22,415 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:03:22,416 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:03:22,416 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:03:22,416 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:03:22,416 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:03:22,417 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:03:22,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:03:22,418 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:03:22,418 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:03:22,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:03:22,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:03:22,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:03:22,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:03:22,419 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:03:22,419 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:03:22,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:03:22,419 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:03:22,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:03:22,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:03:22,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:03:22,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:03:22,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:03:22,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:03:22,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:03:22,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:03:22,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:03:22,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:03:22,421 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:03:22,421 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:03:22,422 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:03:22,422 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:03:22,422 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d17ef4c86a3b9aaad0f3756316af6b356203f50f5a16d9fd49cf45964daad71 [2021-12-15 09:03:22,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:03:22,595 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:03:22,597 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:03:22,598 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:03:22,598 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:03:22,599 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label12.c [2021-12-15 09:03:22,666 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5ae554f4/8d27c6d130eb4844a1b488e676863aa4/FLAG418928f60 [2021-12-15 09:03:23,151 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:03:23,152 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label12.c [2021-12-15 09:03:23,168 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5ae554f4/8d27c6d130eb4844a1b488e676863aa4/FLAG418928f60 [2021-12-15 09:03:23,495 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5ae554f4/8d27c6d130eb4844a1b488e676863aa4 [2021-12-15 09:03:23,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:03:23,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:03:23,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:03:23,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:03:23,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:03:23,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:03:23" (1/1) ... [2021-12-15 09:03:23,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b6907e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:03:23, skipping insertion in model container [2021-12-15 09:03:23,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:03:23" (1/1) ... [2021-12-15 09:03:23,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:03:23,560 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:03:23,887 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/Problem03_label12.c[56222,56235] [2021-12-15 09:03:23,914 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:03:23,919 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:03:24,057 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/Problem03_label12.c[56222,56235] [2021-12-15 09:03:24,069 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:03:24,080 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:03:24,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:03:24 WrapperNode [2021-12-15 09:03:24,081 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:03:24,082 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:03:24,082 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:03:24,082 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:03:24,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:03:24" (1/1) ... [2021-12-15 09:03:24,112 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:03:24" (1/1) ... [2021-12-15 09:03:24,192 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-12-15 09:03:24,192 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:03:24,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:03:24,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:03:24,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:03:24,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:03:24" (1/1) ... [2021-12-15 09:03:24,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:03:24" (1/1) ... [2021-12-15 09:03:24,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:03:24" (1/1) ... [2021-12-15 09:03:24,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:03:24" (1/1) ... [2021-12-15 09:03:24,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:03:24" (1/1) ... [2021-12-15 09:03:24,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:03:24" (1/1) ... [2021-12-15 09:03:24,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:03:24" (1/1) ... [2021-12-15 09:03:24,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:03:24,283 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:03:24,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:03:24,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:03:24,290 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:03:24" (1/1) ... [2021-12-15 09:03:24,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:03:24,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:03:24,314 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 09:03:24,316 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 09:03:24,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:03:24,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:03:24,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:03:24,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:03:24,442 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:03:24,444 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:03:25,596 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:03:25,607 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:03:25,608 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:03:25,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:03:25 BoogieIcfgContainer [2021-12-15 09:03:25,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:03:25,611 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:03:25,611 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:03:25,614 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:03:25,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:03:23" (1/3) ... [2021-12-15 09:03:25,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3023b6a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:03:25, skipping insertion in model container [2021-12-15 09:03:25,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:03:24" (2/3) ... [2021-12-15 09:03:25,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3023b6a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:03:25, skipping insertion in model container [2021-12-15 09:03:25,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:03:25" (3/3) ... [2021-12-15 09:03:25,617 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label12.c [2021-12-15 09:03:25,623 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:03:25,623 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:03:25,653 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:03:25,657 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 09:03:25,658 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:03:25,670 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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 09:03:25,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-15 09:03:25,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:25,680 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:03:25,681 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:25,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:25,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1237142429, now seen corresponding path program 1 times [2021-12-15 09:03:25,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:25,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973729389] [2021-12-15 09:03:25,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:25,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:26,067 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 09:03:26,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:26,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973729389] [2021-12-15 09:03:26,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973729389] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:26,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:03:26,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:03:26,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805035875] [2021-12-15 09:03:26,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:26,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:26,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:26,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:26,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:03:26,092 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 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 09:03:26,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:26,816 INFO L93 Difference]: Finished difference Result 843 states and 1493 transitions. [2021-12-15 09:03:26,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:26,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 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 163 [2021-12-15 09:03:26,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:26,841 INFO L225 Difference]: With dead ends: 843 [2021-12-15 09:03:26,841 INFO L226 Difference]: Without dead ends: 463 [2021-12-15 09:03:26,844 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 09:03:26,846 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 111 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:26,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 121 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:03:26,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-12-15 09:03:26,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 449. [2021-12-15 09:03:26,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.6339285714285714) internal successors, (732), 448 states have internal predecessors, (732), 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 09:03:26,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 732 transitions. [2021-12-15 09:03:26,884 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 732 transitions. Word has length 163 [2021-12-15 09:03:26,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:26,885 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 732 transitions. [2021-12-15 09:03:26,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 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 09:03:26,885 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 732 transitions. [2021-12-15 09:03:26,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-15 09:03:26,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:26,888 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:03:26,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:03:26,889 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:26,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:26,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1701498711, now seen corresponding path program 1 times [2021-12-15 09:03:26,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:26,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003116322] [2021-12-15 09:03:26,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:26,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:26,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:03:26,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:26,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003116322] [2021-12-15 09:03:26,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003116322] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:26,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:03:26,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:03:26,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140718046] [2021-12-15 09:03:26,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:26,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:26,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:26,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:26,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:03:26,972 INFO L87 Difference]: Start difference. First operand 449 states and 732 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 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 09:03:27,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:27,532 INFO L93 Difference]: Finished difference Result 1331 states and 2178 transitions. [2021-12-15 09:03:27,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:27,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 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 169 [2021-12-15 09:03:27,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:27,535 INFO L225 Difference]: With dead ends: 1331 [2021-12-15 09:03:27,535 INFO L226 Difference]: Without dead ends: 884 [2021-12-15 09:03:27,537 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 09:03:27,537 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 283 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:27,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 111 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:03:27,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-12-15 09:03:27,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 877. [2021-12-15 09:03:27,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 1.610730593607306) internal successors, (1411), 876 states have internal predecessors, (1411), 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 09:03:27,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1411 transitions. [2021-12-15 09:03:27,559 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1411 transitions. Word has length 169 [2021-12-15 09:03:27,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:27,559 INFO L470 AbstractCegarLoop]: Abstraction has 877 states and 1411 transitions. [2021-12-15 09:03:27,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 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 09:03:27,560 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1411 transitions. [2021-12-15 09:03:27,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-15 09:03:27,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:27,564 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:03:27,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:03:27,564 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:27,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:27,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1060788097, now seen corresponding path program 1 times [2021-12-15 09:03:27,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:27,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925908126] [2021-12-15 09:03:27,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:27,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:27,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:03:27,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:27,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925908126] [2021-12-15 09:03:27,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925908126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:27,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:03:27,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:03:27,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104308151] [2021-12-15 09:03:27,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:27,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:27,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:27,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:27,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:03:27,613 INFO L87 Difference]: Start difference. First operand 877 states and 1411 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 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 09:03:28,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:28,175 INFO L93 Difference]: Finished difference Result 2565 states and 4141 transitions. [2021-12-15 09:03:28,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:28,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 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 169 [2021-12-15 09:03:28,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:28,180 INFO L225 Difference]: With dead ends: 2565 [2021-12-15 09:03:28,180 INFO L226 Difference]: Without dead ends: 1690 [2021-12-15 09:03:28,181 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 09:03:28,182 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 214 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:28,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 195 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:03:28,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2021-12-15 09:03:28,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1690. [2021-12-15 09:03:28,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 1.3925399644760212) internal successors, (2352), 1689 states have internal predecessors, (2352), 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 09:03:28,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 2352 transitions. [2021-12-15 09:03:28,208 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 2352 transitions. Word has length 169 [2021-12-15 09:03:28,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:28,208 INFO L470 AbstractCegarLoop]: Abstraction has 1690 states and 2352 transitions. [2021-12-15 09:03:28,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 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 09:03:28,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 2352 transitions. [2021-12-15 09:03:28,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-15 09:03:28,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:28,213 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:03:28,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:03:28,213 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:28,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:28,214 INFO L85 PathProgramCache]: Analyzing trace with hash 896506008, now seen corresponding path program 1 times [2021-12-15 09:03:28,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:28,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155194615] [2021-12-15 09:03:28,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:28,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 09:03:28,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:28,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155194615] [2021-12-15 09:03:28,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155194615] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:28,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:03:28,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:03:28,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548016468] [2021-12-15 09:03:28,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:28,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:28,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:28,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:28,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:03:28,260 INFO L87 Difference]: Start difference. First operand 1690 states and 2352 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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 09:03:28,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:28,858 INFO L93 Difference]: Finished difference Result 5028 states and 7009 transitions. [2021-12-15 09:03:28,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:28,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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 177 [2021-12-15 09:03:28,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:28,867 INFO L225 Difference]: With dead ends: 5028 [2021-12-15 09:03:28,867 INFO L226 Difference]: Without dead ends: 3340 [2021-12-15 09:03:28,869 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 09:03:28,870 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:28,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 91 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:03:28,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3340 states. [2021-12-15 09:03:28,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3340 to 3319. [2021-12-15 09:03:28,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3319 states, 3318 states have (on average 1.365581675708258) internal successors, (4531), 3318 states have internal predecessors, (4531), 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 09:03:28,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 4531 transitions. [2021-12-15 09:03:28,923 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 4531 transitions. Word has length 177 [2021-12-15 09:03:28,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:28,923 INFO L470 AbstractCegarLoop]: Abstraction has 3319 states and 4531 transitions. [2021-12-15 09:03:28,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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 09:03:28,924 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 4531 transitions. [2021-12-15 09:03:28,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-15 09:03:28,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:28,929 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:03:28,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:03:28,929 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:28,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:28,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1443297613, now seen corresponding path program 1 times [2021-12-15 09:03:28,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:28,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287080862] [2021-12-15 09:03:28,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:28,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:28,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:03:28,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:28,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287080862] [2021-12-15 09:03:28,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287080862] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:28,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:03:28,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:03:28,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969722701] [2021-12-15 09:03:28,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:28,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:28,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:28,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:28,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:03:28,985 INFO L87 Difference]: Start difference. First operand 3319 states and 4531 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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 09:03:29,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:29,587 INFO L93 Difference]: Finished difference Result 8073 states and 11034 transitions. [2021-12-15 09:03:29,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:29,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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 184 [2021-12-15 09:03:29,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:29,599 INFO L225 Difference]: With dead ends: 8073 [2021-12-15 09:03:29,599 INFO L226 Difference]: Without dead ends: 4756 [2021-12-15 09:03:29,601 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 09:03:29,602 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 222 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:29,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 371 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:03:29,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4756 states. [2021-12-15 09:03:29,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4756 to 4750. [2021-12-15 09:03:29,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4750 states, 4749 states have (on average 1.3185933880817013) internal successors, (6262), 4749 states have internal predecessors, (6262), 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 09:03:29,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4750 states to 4750 states and 6262 transitions. [2021-12-15 09:03:29,653 INFO L78 Accepts]: Start accepts. Automaton has 4750 states and 6262 transitions. Word has length 184 [2021-12-15 09:03:29,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:29,654 INFO L470 AbstractCegarLoop]: Abstraction has 4750 states and 6262 transitions. [2021-12-15 09:03:29,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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 09:03:29,654 INFO L276 IsEmpty]: Start isEmpty. Operand 4750 states and 6262 transitions. [2021-12-15 09:03:29,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-12-15 09:03:29,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:29,659 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:03:29,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:03:29,660 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:29,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:29,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1265823663, now seen corresponding path program 1 times [2021-12-15 09:03:29,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:29,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066775874] [2021-12-15 09:03:29,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:29,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 09:03:29,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:29,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066775874] [2021-12-15 09:03:29,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066775874] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:29,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:03:29,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:03:29,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760108189] [2021-12-15 09:03:29,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:29,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:29,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:29,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:29,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:03:29,706 INFO L87 Difference]: Start difference. First operand 4750 states and 6262 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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 09:03:29,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:29,909 INFO L93 Difference]: Finished difference Result 14012 states and 18509 transitions. [2021-12-15 09:03:29,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:29,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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 189 [2021-12-15 09:03:29,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:29,930 INFO L225 Difference]: With dead ends: 14012 [2021-12-15 09:03:29,930 INFO L226 Difference]: Without dead ends: 9264 [2021-12-15 09:03:29,935 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 09:03:29,935 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 361 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:29,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 585 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 09:03:29,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9264 states. [2021-12-15 09:03:30,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9264 to 9260. [2021-12-15 09:03:30,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9260 states, 9259 states have (on average 1.321092990603737) internal successors, (12232), 9259 states have internal predecessors, (12232), 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 09:03:30,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9260 states to 9260 states and 12232 transitions. [2021-12-15 09:03:30,074 INFO L78 Accepts]: Start accepts. Automaton has 9260 states and 12232 transitions. Word has length 189 [2021-12-15 09:03:30,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:30,074 INFO L470 AbstractCegarLoop]: Abstraction has 9260 states and 12232 transitions. [2021-12-15 09:03:30,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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 09:03:30,075 INFO L276 IsEmpty]: Start isEmpty. Operand 9260 states and 12232 transitions. [2021-12-15 09:03:30,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-15 09:03:30,085 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:30,085 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:03:30,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:03:30,086 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:30,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:30,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1027618801, now seen corresponding path program 1 times [2021-12-15 09:03:30,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:30,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544495974] [2021-12-15 09:03:30,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:30,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:30,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-15 09:03:30,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:30,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544495974] [2021-12-15 09:03:30,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544495974] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:30,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:03:30,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:03:30,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188891565] [2021-12-15 09:03:30,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:30,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:30,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:30,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:30,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:03:30,134 INFO L87 Difference]: Start difference. First operand 9260 states and 12232 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 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 09:03:30,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:30,450 INFO L93 Difference]: Finished difference Result 18458 states and 24378 transitions. [2021-12-15 09:03:30,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:30,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 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 191 [2021-12-15 09:03:30,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:30,469 INFO L225 Difference]: With dead ends: 18458 [2021-12-15 09:03:30,470 INFO L226 Difference]: Without dead ends: 9200 [2021-12-15 09:03:30,477 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 09:03:30,478 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 326 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:30,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 09:03:30,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9200 states. [2021-12-15 09:03:30,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9200 to 9200. [2021-12-15 09:03:30,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9200 states, 9199 states have (on average 1.2860093488422655) internal successors, (11830), 9199 states have internal predecessors, (11830), 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 09:03:30,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9200 states to 9200 states and 11830 transitions. [2021-12-15 09:03:30,610 INFO L78 Accepts]: Start accepts. Automaton has 9200 states and 11830 transitions. Word has length 191 [2021-12-15 09:03:30,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:30,611 INFO L470 AbstractCegarLoop]: Abstraction has 9200 states and 11830 transitions. [2021-12-15 09:03:30,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 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 09:03:30,611 INFO L276 IsEmpty]: Start isEmpty. Operand 9200 states and 11830 transitions. [2021-12-15 09:03:30,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-15 09:03:30,619 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:30,619 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:03:30,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:03:30,620 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:30,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:30,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1779513149, now seen corresponding path program 1 times [2021-12-15 09:03:30,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:30,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073056335] [2021-12-15 09:03:30,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:30,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:30,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:30,663 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:03:30,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:30,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073056335] [2021-12-15 09:03:30,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073056335] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:30,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:03:30,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:03:30,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555971112] [2021-12-15 09:03:30,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:30,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:30,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:30,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:30,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:03:30,666 INFO L87 Difference]: Start difference. First operand 9200 states and 11830 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 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 09:03:31,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:31,284 INFO L93 Difference]: Finished difference Result 26132 states and 33741 transitions. [2021-12-15 09:03:31,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:31,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 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 191 [2021-12-15 09:03:31,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:31,314 INFO L225 Difference]: With dead ends: 26132 [2021-12-15 09:03:31,314 INFO L226 Difference]: Without dead ends: 16934 [2021-12-15 09:03:31,324 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 09:03:31,325 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 206 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:31,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 91 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:03:31,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16934 states. [2021-12-15 09:03:31,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16934 to 16923. [2021-12-15 09:03:31,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16923 states, 16922 states have (on average 1.245774731119253) internal successors, (21081), 16922 states have internal predecessors, (21081), 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 09:03:31,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16923 states to 16923 states and 21081 transitions. [2021-12-15 09:03:31,531 INFO L78 Accepts]: Start accepts. Automaton has 16923 states and 21081 transitions. Word has length 191 [2021-12-15 09:03:31,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:31,570 INFO L470 AbstractCegarLoop]: Abstraction has 16923 states and 21081 transitions. [2021-12-15 09:03:31,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 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 09:03:31,571 INFO L276 IsEmpty]: Start isEmpty. Operand 16923 states and 21081 transitions. [2021-12-15 09:03:31,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-12-15 09:03:31,582 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:31,582 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:03:31,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:03:31,585 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:31,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:31,586 INFO L85 PathProgramCache]: Analyzing trace with hash -2131947160, now seen corresponding path program 1 times [2021-12-15 09:03:31,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:31,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84066789] [2021-12-15 09:03:31,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:31,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:03:31,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:31,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84066789] [2021-12-15 09:03:31,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84066789] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:31,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:03:31,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:03:31,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722640929] [2021-12-15 09:03:31,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:31,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:03:31,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:31,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:03:31,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:03:31,647 INFO L87 Difference]: Start difference. First operand 16923 states and 21081 transitions. Second operand has 4 states, 4 states have (on average 50.0) internal successors, (200), 3 states have internal predecessors, (200), 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 09:03:32,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:32,581 INFO L93 Difference]: Finished difference Result 35289 states and 44346 transitions. [2021-12-15 09:03:32,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:03:32,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.0) internal successors, (200), 3 states have internal predecessors, (200), 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 200 [2021-12-15 09:03:32,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:32,616 INFO L225 Difference]: With dead ends: 35289 [2021-12-15 09:03:32,617 INFO L226 Difference]: Without dead ends: 18571 [2021-12-15 09:03:32,625 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 09:03:32,627 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 405 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:32,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 105 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:03:32,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18571 states. [2021-12-15 09:03:32,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18571 to 16720. [2021-12-15 09:03:32,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16720 states, 16719 states have (on average 1.2453496022489383) internal successors, (20821), 16719 states have internal predecessors, (20821), 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 09:03:32,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16720 states to 16720 states and 20821 transitions. [2021-12-15 09:03:32,892 INFO L78 Accepts]: Start accepts. Automaton has 16720 states and 20821 transitions. Word has length 200 [2021-12-15 09:03:32,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:32,892 INFO L470 AbstractCegarLoop]: Abstraction has 16720 states and 20821 transitions. [2021-12-15 09:03:32,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.0) internal successors, (200), 3 states have internal predecessors, (200), 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 09:03:32,893 INFO L276 IsEmpty]: Start isEmpty. Operand 16720 states and 20821 transitions. [2021-12-15 09:03:32,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-15 09:03:32,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:32,908 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:03:32,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:03:32,908 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:32,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:32,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1763947795, now seen corresponding path program 1 times [2021-12-15 09:03:32,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:32,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525046997] [2021-12-15 09:03:32,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:32,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:32,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:32,975 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 09:03:32,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:32,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525046997] [2021-12-15 09:03:32,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525046997] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:03:32,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420353818] [2021-12-15 09:03:32,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:32,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:03:32,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:03:32,977 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 09:03:32,982 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 09:03:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:33,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:03:33,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:03:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:03:33,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:03:33,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420353818] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:33,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:03:33,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:03:33,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980008757] [2021-12-15 09:03:33,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:33,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:33,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:33,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:33,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:33,358 INFO L87 Difference]: Start difference. First operand 16720 states and 20821 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 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 09:03:34,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:34,003 INFO L93 Difference]: Finished difference Result 40348 states and 51293 transitions. [2021-12-15 09:03:34,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:34,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 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 207 [2021-12-15 09:03:34,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:34,031 INFO L225 Difference]: With dead ends: 40348 [2021-12-15 09:03:34,032 INFO L226 Difference]: Without dead ends: 23833 [2021-12-15 09:03:34,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:34,049 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 215 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:34,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 371 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:03:34,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23833 states. [2021-12-15 09:03:34,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23833 to 21795. [2021-12-15 09:03:34,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21795 states, 21794 states have (on average 1.2058364687528678) internal successors, (26280), 21794 states have internal predecessors, (26280), 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 09:03:34,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21795 states to 21795 states and 26280 transitions. [2021-12-15 09:03:34,443 INFO L78 Accepts]: Start accepts. Automaton has 21795 states and 26280 transitions. Word has length 207 [2021-12-15 09:03:34,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:34,444 INFO L470 AbstractCegarLoop]: Abstraction has 21795 states and 26280 transitions. [2021-12-15 09:03:34,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 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 09:03:34,444 INFO L276 IsEmpty]: Start isEmpty. Operand 21795 states and 26280 transitions. [2021-12-15 09:03:34,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-12-15 09:03:34,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:34,457 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:03:34,496 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 09:03:34,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-15 09:03:34,676 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:34,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:34,677 INFO L85 PathProgramCache]: Analyzing trace with hash 16871877, now seen corresponding path program 1 times [2021-12-15 09:03:34,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:34,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327015322] [2021-12-15 09:03:34,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:34,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:34,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:03:34,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:34,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327015322] [2021-12-15 09:03:34,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327015322] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:34,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:03:34,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:03:34,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477277711] [2021-12-15 09:03:34,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:34,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:34,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:34,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:34,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:03:34,783 INFO L87 Difference]: Start difference. First operand 21795 states and 26280 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:35,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:35,662 INFO L93 Difference]: Finished difference Result 55193 states and 66739 transitions. [2021-12-15 09:03:35,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:35,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 217 [2021-12-15 09:03:35,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:35,704 INFO L225 Difference]: With dead ends: 55193 [2021-12-15 09:03:35,705 INFO L226 Difference]: Without dead ends: 33603 [2021-12-15 09:03:35,713 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 09:03:35,714 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 200 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:35,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 167 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:03:35,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33603 states. [2021-12-15 09:03:36,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33603 to 33593. [2021-12-15 09:03:36,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33593 states, 33592 states have (on average 1.2046915932364848) internal successors, (40468), 33592 states have internal predecessors, (40468), 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 09:03:36,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33593 states to 33593 states and 40468 transitions. [2021-12-15 09:03:36,147 INFO L78 Accepts]: Start accepts. Automaton has 33593 states and 40468 transitions. Word has length 217 [2021-12-15 09:03:36,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:36,147 INFO L470 AbstractCegarLoop]: Abstraction has 33593 states and 40468 transitions. [2021-12-15 09:03:36,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:03:36,147 INFO L276 IsEmpty]: Start isEmpty. Operand 33593 states and 40468 transitions. [2021-12-15 09:03:36,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-12-15 09:03:36,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:36,166 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:03:36,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:03:36,166 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:36,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:36,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1040587174, now seen corresponding path program 1 times [2021-12-15 09:03:36,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:36,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522253793] [2021-12-15 09:03:36,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:36,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 61 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:03:36,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:36,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522253793] [2021-12-15 09:03:36,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522253793] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:03:36,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627754526] [2021-12-15 09:03:36,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:36,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:03:36,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:03:36,266 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:03:36,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 09:03:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:36,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:03:36,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:03:36,782 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-15 09:03:36,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:03:36,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627754526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:36,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:03:36,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 09:03:36,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000035208] [2021-12-15 09:03:36,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:36,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:36,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:36,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:36,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:36,784 INFO L87 Difference]: Start difference. First operand 33593 states and 40468 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 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 09:03:37,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:37,644 INFO L93 Difference]: Finished difference Result 79603 states and 96098 transitions. [2021-12-15 09:03:37,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:37,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 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 225 [2021-12-15 09:03:37,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:37,699 INFO L225 Difference]: With dead ends: 79603 [2021-12-15 09:03:37,699 INFO L226 Difference]: Without dead ends: 47433 [2021-12-15 09:03:37,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:37,729 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 86 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:37,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 128 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:03:37,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47433 states. [2021-12-15 09:03:38,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47433 to 47021. [2021-12-15 09:03:38,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47021 states, 47020 states have (on average 1.1934921310080817) internal successors, (56118), 47020 states have internal predecessors, (56118), 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 09:03:38,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47021 states to 47021 states and 56118 transitions. [2021-12-15 09:03:38,511 INFO L78 Accepts]: Start accepts. Automaton has 47021 states and 56118 transitions. Word has length 225 [2021-12-15 09:03:38,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:38,512 INFO L470 AbstractCegarLoop]: Abstraction has 47021 states and 56118 transitions. [2021-12-15 09:03:38,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 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 09:03:38,513 INFO L276 IsEmpty]: Start isEmpty. Operand 47021 states and 56118 transitions. [2021-12-15 09:03:38,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-12-15 09:03:38,530 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:38,530 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:03:38,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 09:03:38,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-15 09:03:38,744 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:38,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:38,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1635882939, now seen corresponding path program 1 times [2021-12-15 09:03:38,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:38,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033054906] [2021-12-15 09:03:38,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:38,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:38,871 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:03:38,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:38,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033054906] [2021-12-15 09:03:38,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033054906] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:38,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:03:38,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:03:38,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419828424] [2021-12-15 09:03:38,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:38,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:03:38,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:38,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:03:38,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:03:38,873 INFO L87 Difference]: Start difference. First operand 47021 states and 56118 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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 09:03:40,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:40,462 INFO L93 Difference]: Finished difference Result 133459 states and 160333 transitions. [2021-12-15 09:03:40,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:03:40,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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 232 [2021-12-15 09:03:40,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:40,598 INFO L225 Difference]: With dead ends: 133459 [2021-12-15 09:03:40,598 INFO L226 Difference]: Without dead ends: 88472 [2021-12-15 09:03:40,642 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 09:03:40,643 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 542 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:40,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 433 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 09:03:40,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88472 states. [2021-12-15 09:03:41,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88472 to 85013. [2021-12-15 09:03:41,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85013 states, 85012 states have (on average 1.1842916294170234) internal successors, (100679), 85012 states have internal predecessors, (100679), 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 09:03:41,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85013 states to 85013 states and 100679 transitions. [2021-12-15 09:03:41,875 INFO L78 Accepts]: Start accepts. Automaton has 85013 states and 100679 transitions. Word has length 232 [2021-12-15 09:03:41,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:41,875 INFO L470 AbstractCegarLoop]: Abstraction has 85013 states and 100679 transitions. [2021-12-15 09:03:41,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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 09:03:41,875 INFO L276 IsEmpty]: Start isEmpty. Operand 85013 states and 100679 transitions. [2021-12-15 09:03:41,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-12-15 09:03:41,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:41,894 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:03:41,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 09:03:41,894 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:41,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:41,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1022143992, now seen corresponding path program 1 times [2021-12-15 09:03:41,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:41,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364049908] [2021-12-15 09:03:41,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:41,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:41,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 09:03:41,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:41,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364049908] [2021-12-15 09:03:41,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364049908] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:03:41,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120031995] [2021-12-15 09:03:41,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:41,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:03:41,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:03:41,981 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:03:41,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 09:03:42,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:42,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:03:42,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:03:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:03:42,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:03:42,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120031995] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:42,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:03:42,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:03:42,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684455161] [2021-12-15 09:03:42,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:42,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:42,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:42,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:42,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:42,556 INFO L87 Difference]: Start difference. First operand 85013 states and 100679 transitions. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 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 09:03:43,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:43,624 INFO L93 Difference]: Finished difference Result 187325 states and 223449 transitions. [2021-12-15 09:03:43,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:43,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 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 235 [2021-12-15 09:03:43,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:43,775 INFO L225 Difference]: With dead ends: 187325 [2021-12-15 09:03:43,775 INFO L226 Difference]: Without dead ends: 104348 [2021-12-15 09:03:43,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:43,821 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 199 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:43,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 362 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:03:43,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104348 states. [2021-12-15 09:03:45,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104348 to 103726. [2021-12-15 09:03:45,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103726 states, 103725 states have (on average 1.1793106772716317) internal successors, (122324), 103725 states have internal predecessors, (122324), 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 09:03:45,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103726 states to 103726 states and 122324 transitions. [2021-12-15 09:03:45,448 INFO L78 Accepts]: Start accepts. Automaton has 103726 states and 122324 transitions. Word has length 235 [2021-12-15 09:03:45,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:45,448 INFO L470 AbstractCegarLoop]: Abstraction has 103726 states and 122324 transitions. [2021-12-15 09:03:45,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 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 09:03:45,449 INFO L276 IsEmpty]: Start isEmpty. Operand 103726 states and 122324 transitions. [2021-12-15 09:03:45,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-12-15 09:03:45,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:45,475 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:03:45,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-15 09:03:45,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:03:45,692 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:45,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:45,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1917458341, now seen corresponding path program 1 times [2021-12-15 09:03:45,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:45,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917822996] [2021-12-15 09:03:45,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:45,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:45,783 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-15 09:03:45,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:45,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917822996] [2021-12-15 09:03:45,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917822996] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:45,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:03:45,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:03:45,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005510532] [2021-12-15 09:03:45,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:45,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:03:45,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:45,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:03:45,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:03:45,786 INFO L87 Difference]: Start difference. First operand 103726 states and 122324 transitions. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 3 states have internal predecessors, (189), 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 09:03:46,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:46,964 INFO L93 Difference]: Finished difference Result 205460 states and 242429 transitions. [2021-12-15 09:03:46,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:03:46,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 3 states have internal predecessors, (189), 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 267 [2021-12-15 09:03:46,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:47,117 INFO L225 Difference]: With dead ends: 205460 [2021-12-15 09:03:47,117 INFO L226 Difference]: Without dead ends: 103770 [2021-12-15 09:03:47,183 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 09:03:47,187 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 472 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:47,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 45 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:03:47,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103770 states. [2021-12-15 09:03:48,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103770 to 103320. [2021-12-15 09:03:48,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103320 states, 103319 states have (on average 1.1672199692215373) internal successors, (120596), 103319 states have internal predecessors, (120596), 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 09:03:49,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103320 states to 103320 states and 120596 transitions. [2021-12-15 09:03:49,234 INFO L78 Accepts]: Start accepts. Automaton has 103320 states and 120596 transitions. Word has length 267 [2021-12-15 09:03:49,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:49,234 INFO L470 AbstractCegarLoop]: Abstraction has 103320 states and 120596 transitions. [2021-12-15 09:03:49,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 3 states have internal predecessors, (189), 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 09:03:49,234 INFO L276 IsEmpty]: Start isEmpty. Operand 103320 states and 120596 transitions. [2021-12-15 09:03:49,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-12-15 09:03:49,252 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:49,252 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 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 09:03:49,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 09:03:49,253 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:49,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:49,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1072627993, now seen corresponding path program 1 times [2021-12-15 09:03:49,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:49,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275631466] [2021-12-15 09:03:49,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:49,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:49,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:49,308 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-12-15 09:03:49,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:49,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275631466] [2021-12-15 09:03:49,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275631466] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:49,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:03:49,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:03:49,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073200059] [2021-12-15 09:03:49,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:49,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:49,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:49,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:49,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:03:49,310 INFO L87 Difference]: Start difference. First operand 103320 states and 120596 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 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 09:03:50,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:50,415 INFO L93 Difference]: Finished difference Result 204807 states and 239105 transitions. [2021-12-15 09:03:50,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:50,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 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 278 [2021-12-15 09:03:50,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:50,565 INFO L225 Difference]: With dead ends: 204807 [2021-12-15 09:03:50,566 INFO L226 Difference]: Without dead ends: 103523 [2021-12-15 09:03:50,610 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 09:03:50,611 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 172 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:50,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 157 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:03:50,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103523 states. [2021-12-15 09:03:52,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103523 to 103523. [2021-12-15 09:03:52,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103523 states, 103522 states have (on average 1.1670272985452368) internal successors, (120813), 103522 states have internal predecessors, (120813), 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 09:03:52,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103523 states to 103523 states and 120813 transitions. [2021-12-15 09:03:52,349 INFO L78 Accepts]: Start accepts. Automaton has 103523 states and 120813 transitions. Word has length 278 [2021-12-15 09:03:52,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:52,350 INFO L470 AbstractCegarLoop]: Abstraction has 103523 states and 120813 transitions. [2021-12-15 09:03:52,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 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 09:03:52,350 INFO L276 IsEmpty]: Start isEmpty. Operand 103523 states and 120813 transitions. [2021-12-15 09:03:52,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-12-15 09:03:52,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:52,380 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:03:52,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 09:03:52,381 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:52,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:52,382 INFO L85 PathProgramCache]: Analyzing trace with hash 841319250, now seen corresponding path program 1 times [2021-12-15 09:03:52,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:52,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309713385] [2021-12-15 09:03:52,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:52,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:52,449 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 87 proven. 6 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-12-15 09:03:52,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:52,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309713385] [2021-12-15 09:03:52,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309713385] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:03:52,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204114871] [2021-12-15 09:03:52,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:52,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:03:52,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:03:52,476 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:03:52,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 09:03:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:52,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:03:52,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:03:52,966 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-15 09:03:52,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:03:52,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204114871] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:52,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:03:52,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:03:52,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335397804] [2021-12-15 09:03:52,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:52,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:52,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:52,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:52,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:52,969 INFO L87 Difference]: Start difference. First operand 103523 states and 120813 transitions. Second operand has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 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 09:03:54,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:54,239 INFO L93 Difference]: Finished difference Result 231894 states and 272109 transitions. [2021-12-15 09:03:54,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:54,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 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 285 [2021-12-15 09:03:54,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:54,383 INFO L225 Difference]: With dead ends: 231894 [2021-12-15 09:03:54,383 INFO L226 Difference]: Without dead ends: 130610 [2021-12-15 09:03:54,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:54,429 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 156 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:54,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 138 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:03:54,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130610 states. [2021-12-15 09:03:55,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130610 to 124245. [2021-12-15 09:03:55,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124245 states, 124244 states have (on average 1.1769904381700524) internal successors, (146234), 124244 states have internal predecessors, (146234), 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 09:03:56,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124245 states to 124245 states and 146234 transitions. [2021-12-15 09:03:56,170 INFO L78 Accepts]: Start accepts. Automaton has 124245 states and 146234 transitions. Word has length 285 [2021-12-15 09:03:56,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:03:56,171 INFO L470 AbstractCegarLoop]: Abstraction has 124245 states and 146234 transitions. [2021-12-15 09:03:56,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 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 09:03:56,171 INFO L276 IsEmpty]: Start isEmpty. Operand 124245 states and 146234 transitions. [2021-12-15 09:03:56,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-12-15 09:03:56,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:03:56,213 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:03:56,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 09:03:56,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-15 09:03:56,430 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:03:56,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:03:56,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1168148689, now seen corresponding path program 1 times [2021-12-15 09:03:56,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:03:56,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273604020] [2021-12-15 09:03:56,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:56,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:03:56,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:56,547 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 108 proven. 6 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-15 09:03:56,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:03:56,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273604020] [2021-12-15 09:03:56,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273604020] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:03:56,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417168713] [2021-12-15 09:03:56,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:03:56,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:03:56,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:03:56,550 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:03:56,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 09:03:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:03:56,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:03:56,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:03:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-15 09:03:57,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:03:57,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417168713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:03:57,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:03:57,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:03:57,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687258416] [2021-12-15 09:03:57,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:03:57,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:03:57,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:03:57,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:03:57,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:57,108 INFO L87 Difference]: Start difference. First operand 124245 states and 146234 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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 09:03:58,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:03:58,500 INFO L93 Difference]: Finished difference Result 232405 states and 272019 transitions. [2021-12-15 09:03:58,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:03:58,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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 302 [2021-12-15 09:03:58,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:03:58,645 INFO L225 Difference]: With dead ends: 232405 [2021-12-15 09:03:58,645 INFO L226 Difference]: Without dead ends: 109788 [2021-12-15 09:03:58,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:03:58,714 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 80 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:03:58,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 321 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:03:58,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109788 states. [2021-12-15 09:03:59,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109788 to 90695. [2021-12-15 09:03:59,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90695 states, 90694 states have (on average 1.133702339735815) internal successors, (102820), 90694 states have internal predecessors, (102820), 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 09:04:00,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90695 states to 90695 states and 102820 transitions. [2021-12-15 09:04:00,387 INFO L78 Accepts]: Start accepts. Automaton has 90695 states and 102820 transitions. Word has length 302 [2021-12-15 09:04:00,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:00,388 INFO L470 AbstractCegarLoop]: Abstraction has 90695 states and 102820 transitions. [2021-12-15 09:04:00,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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 09:04:00,388 INFO L276 IsEmpty]: Start isEmpty. Operand 90695 states and 102820 transitions. [2021-12-15 09:04:00,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-12-15 09:04:00,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:00,415 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:00,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-15 09:04:00,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-15 09:04:00,630 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:00,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:00,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1028595902, now seen corresponding path program 1 times [2021-12-15 09:04:00,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:00,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738511531] [2021-12-15 09:04:00,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:00,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:00,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-15 09:04:00,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:00,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738511531] [2021-12-15 09:04:00,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738511531] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:04:00,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487991390] [2021-12-15 09:04:00,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:00,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:00,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:04:00,725 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:04:00,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 09:04:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:00,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:04:00,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:04:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-15 09:04:01,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:04:01,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487991390] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:01,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:04:01,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:04:01,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029419403] [2021-12-15 09:04:01,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:01,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:04:01,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:01,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:04:01,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:04:01,456 INFO L87 Difference]: Start difference. First operand 90695 states and 102820 transitions. Second operand has 4 states, 4 states have (on average 68.25) internal successors, (273), 3 states have internal predecessors, (273), 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 09:04:02,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:02,977 INFO L93 Difference]: Finished difference Result 266902 states and 302559 transitions. [2021-12-15 09:04:02,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:04:02,978 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 68.25) internal successors, (273), 3 states have internal predecessors, (273), 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 308 [2021-12-15 09:04:02,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:03,214 INFO L225 Difference]: With dead ends: 266902 [2021-12-15 09:04:03,214 INFO L226 Difference]: Without dead ends: 178042 [2021-12-15 09:04:03,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:04:03,255 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 612 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:03,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [612 Valid, 353 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:04:03,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178042 states. [2021-12-15 09:04:05,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178042 to 173152. [2021-12-15 09:04:05,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173152 states, 173151 states have (on average 1.126704437167559) internal successors, (195090), 173151 states have internal predecessors, (195090), 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 09:04:05,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173152 states to 173152 states and 195090 transitions. [2021-12-15 09:04:05,840 INFO L78 Accepts]: Start accepts. Automaton has 173152 states and 195090 transitions. Word has length 308 [2021-12-15 09:04:05,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:05,840 INFO L470 AbstractCegarLoop]: Abstraction has 173152 states and 195090 transitions. [2021-12-15 09:04:05,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.25) internal successors, (273), 3 states have internal predecessors, (273), 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 09:04:05,841 INFO L276 IsEmpty]: Start isEmpty. Operand 173152 states and 195090 transitions. [2021-12-15 09:04:05,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-12-15 09:04:05,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:05,874 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:04:05,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-15 09:04:06,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:06,088 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:06,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:06,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1726459880, now seen corresponding path program 1 times [2021-12-15 09:04:06,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:06,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191701758] [2021-12-15 09:04:06,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:06,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-15 09:04:06,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:06,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191701758] [2021-12-15 09:04:06,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191701758] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:04:06,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92598864] [2021-12-15 09:04:06,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:06,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:06,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:04:06,165 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:04:06,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 09:04:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:06,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:04:06,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:04:06,684 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-12-15 09:04:06,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:04:06,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92598864] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:06,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:04:06,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:04:06,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293294646] [2021-12-15 09:04:06,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:06,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:06,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:06,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:06,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:06,685 INFO L87 Difference]: Start difference. First operand 173152 states and 195090 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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 09:04:08,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:08,330 INFO L93 Difference]: Finished difference Result 350611 states and 394077 transitions. [2021-12-15 09:04:08,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:08,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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 309 [2021-12-15 09:04:08,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:08,562 INFO L225 Difference]: With dead ends: 350611 [2021-12-15 09:04:08,562 INFO L226 Difference]: Without dead ends: 178275 [2021-12-15 09:04:09,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:09,056 INFO L933 BasicCegarLoop]: 344 mSDtfsCounter, 70 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:09,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 369 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:04:09,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178275 states. [2021-12-15 09:04:11,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178275 to 174555. [2021-12-15 09:04:11,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174555 states, 174554 states have (on average 1.111988267241083) internal successors, (194102), 174554 states have internal predecessors, (194102), 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 09:04:11,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174555 states to 174555 states and 194102 transitions. [2021-12-15 09:04:11,730 INFO L78 Accepts]: Start accepts. Automaton has 174555 states and 194102 transitions. Word has length 309 [2021-12-15 09:04:11,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:11,730 INFO L470 AbstractCegarLoop]: Abstraction has 174555 states and 194102 transitions. [2021-12-15 09:04:11,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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 09:04:11,730 INFO L276 IsEmpty]: Start isEmpty. Operand 174555 states and 194102 transitions. [2021-12-15 09:04:11,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2021-12-15 09:04:11,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:11,773 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:11,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 09:04:11,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:11,988 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:11,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:11,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1751985688, now seen corresponding path program 1 times [2021-12-15 09:04:11,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:11,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177882705] [2021-12-15 09:04:11,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:11,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:12,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 145 proven. 6 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-12-15 09:04:12,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:12,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177882705] [2021-12-15 09:04:12,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177882705] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:04:12,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055074287] [2021-12-15 09:04:12,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:12,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:12,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:04:12,132 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:04:12,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 09:04:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:12,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:04:12,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:04:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 278 proven. 62 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 09:04:12,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:04:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 278 proven. 62 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 09:04:13,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055074287] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 09:04:13,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 09:04:13,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 6 [2021-12-15 09:04:13,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677081111] [2021-12-15 09:04:13,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 09:04:13,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 09:04:13,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:13,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 09:04:13,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:04:13,141 INFO L87 Difference]: Start difference. First operand 174555 states and 194102 transitions. Second operand has 6 states, 6 states have (on average 58.0) internal successors, (348), 6 states have internal predecessors, (348), 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)