./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label49.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem03_label49.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 e2ce90b08f9dc9315f13f0d8408b309f0856f833532caca0391f68d5a9cb9786 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:08:06,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:08:06,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:08:06,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:08:06,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:08:06,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:08:06,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:08:06,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:08:06,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:08:06,482 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:08:06,482 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:08:06,483 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:08:06,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:08:06,485 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:08:06,487 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:08:06,491 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:08:06,492 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:08:06,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:08:06,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:08:06,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:08:06,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:08:06,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:08:06,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:08:06,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:08:06,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:08:06,504 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:08:06,504 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:08:06,505 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:08:06,505 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:08:06,506 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:08:06,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:08:06,507 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:08:06,508 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:08:06,508 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:08:06,509 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:08:06,509 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:08:06,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:08:06,510 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:08:06,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:08:06,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:08:06,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:08:06,512 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:08:06,557 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:08:06,557 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:08:06,557 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:08:06,557 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:08:06,558 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:08:06,558 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:08:06,559 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:08:06,559 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:08:06,559 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:08:06,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:08:06,559 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:08:06,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:08:06,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:08:06,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:08:06,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:08:06,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:08:06,560 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:08:06,560 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:08:06,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:08:06,560 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:08:06,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:08:06,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:08:06,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:08:06,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:08:06,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:08:06,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:08:06,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:08:06,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:08:06,562 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:08:06,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:08:06,562 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:08:06,562 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:08:06,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:08:06,562 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:08:06,562 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e2ce90b08f9dc9315f13f0d8408b309f0856f833532caca0391f68d5a9cb9786 [2021-12-15 22:08:06,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:08:06,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:08:06,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:08:06,777 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:08:06,780 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:08:06,781 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label49.c [2021-12-15 22:08:06,824 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57a034d32/b46f13cbd9eb4900806a53696e3e0109/FLAGe677d608a [2021-12-15 22:08:07,247 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:08:07,248 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label49.c [2021-12-15 22:08:07,258 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57a034d32/b46f13cbd9eb4900806a53696e3e0109/FLAGe677d608a [2021-12-15 22:08:07,267 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57a034d32/b46f13cbd9eb4900806a53696e3e0109 [2021-12-15 22:08:07,268 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:08:07,269 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:08:07,270 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:08:07,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:08:07,273 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:08:07,273 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:08:07" (1/1) ... [2021-12-15 22:08:07,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e26c97c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:07, skipping insertion in model container [2021-12-15 22:08:07,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:08:07" (1/1) ... [2021-12-15 22:08:07,278 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:08:07,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:08:07,649 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_label49.c[56899,56912] [2021-12-15 22:08:07,671 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:08:07,677 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:08:07,910 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_label49.c[56899,56912] [2021-12-15 22:08:07,956 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:08:07,969 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:08:07,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:07 WrapperNode [2021-12-15 22:08:07,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:08:07,971 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:08:07,971 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:08:07,971 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:08:07,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:07" (1/1) ... [2021-12-15 22:08:08,007 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:07" (1/1) ... [2021-12-15 22:08:08,063 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-12-15 22:08:08,064 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:08:08,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:08:08,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:08:08,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:08:08,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:07" (1/1) ... [2021-12-15 22:08:08,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:07" (1/1) ... [2021-12-15 22:08:08,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:07" (1/1) ... [2021-12-15 22:08:08,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:07" (1/1) ... [2021-12-15 22:08:08,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:07" (1/1) ... [2021-12-15 22:08:08,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:07" (1/1) ... [2021-12-15 22:08:08,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:07" (1/1) ... [2021-12-15 22:08:08,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:08:08,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:08:08,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:08:08,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:08:08,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:07" (1/1) ... [2021-12-15 22:08:08,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:08:08,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:08,197 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 22:08:08,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 22:08:08,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:08:08,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:08:08,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:08:08,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:08:08,312 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:08:08,313 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:08:09,373 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:08:09,379 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:08:09,380 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:08:09,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:08:09 BoogieIcfgContainer [2021-12-15 22:08:09,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:08:09,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:08:09,382 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:08:09,384 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:08:09,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:08:07" (1/3) ... [2021-12-15 22:08:09,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@709fa7f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:08:09, skipping insertion in model container [2021-12-15 22:08:09,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:07" (2/3) ... [2021-12-15 22:08:09,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@709fa7f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:08:09, skipping insertion in model container [2021-12-15 22:08:09,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:08:09" (3/3) ... [2021-12-15 22:08:09,387 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label49.c [2021-12-15 22:08:09,390 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:08:09,390 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:08:09,419 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:08:09,424 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 22:08:09,424 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:08:09,437 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 22:08:09,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-15 22:08:09,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:09,447 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, 1, 1, 1, 1, 1] [2021-12-15 22:08:09,447 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:09,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:09,451 INFO L85 PathProgramCache]: Analyzing trace with hash -781815326, now seen corresponding path program 1 times [2021-12-15 22:08:09,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:09,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075389495] [2021-12-15 22:08:09,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:09,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:08:09,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:09,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075389495] [2021-12-15 22:08:09,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075389495] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:09,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:08:09,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:08:09,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254895211] [2021-12-15 22:08:09,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:09,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:09,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:09,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:09,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:09,791 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 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:10,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:10,653 INFO L93 Difference]: Finished difference Result 857 states and 1498 transitions. [2021-12-15 22:08:10,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:10,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 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 168 [2021-12-15 22:08:10,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:10,665 INFO L225 Difference]: With dead ends: 857 [2021-12-15 22:08:10,666 INFO L226 Difference]: Without dead ends: 462 [2021-12-15 22:08:10,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:10,671 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 120 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:10,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 187 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 22:08:10,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-12-15 22:08:10,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2021-12-15 22:08:10,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.5381263616557734) internal successors, (706), 459 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:10,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 706 transitions. [2021-12-15 22:08:10,713 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 706 transitions. Word has length 168 [2021-12-15 22:08:10,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:10,714 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 706 transitions. [2021-12-15 22:08:10,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:10,714 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 706 transitions. [2021-12-15 22:08:10,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-15 22:08:10,717 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:10,717 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:10,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:08:10,718 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:10,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:10,718 INFO L85 PathProgramCache]: Analyzing trace with hash 854785153, now seen corresponding path program 1 times [2021-12-15 22:08:10,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:10,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843945252] [2021-12-15 22:08:10,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:10,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:10,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:08:10,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:10,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843945252] [2021-12-15 22:08:10,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843945252] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:10,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:08:10,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:08:10,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439186328] [2021-12-15 22:08:10,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:10,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:10,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:10,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:10,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:10,803 INFO L87 Difference]: Start difference. First operand 460 states and 706 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:11,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:11,467 INFO L93 Difference]: Finished difference Result 1344 states and 2079 transitions. [2021-12-15 22:08:11,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:11,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 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 176 [2021-12-15 22:08:11,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:11,472 INFO L225 Difference]: With dead ends: 1344 [2021-12-15 22:08:11,473 INFO L226 Difference]: Without dead ends: 886 [2021-12-15 22:08:11,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:11,475 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:11,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:08:11,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-12-15 22:08:11,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 870. [2021-12-15 22:08:11,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.5120828538550057) internal successors, (1314), 869 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:11,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1314 transitions. [2021-12-15 22:08:11,512 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1314 transitions. Word has length 176 [2021-12-15 22:08:11,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:11,513 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 1314 transitions. [2021-12-15 22:08:11,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:11,513 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1314 transitions. [2021-12-15 22:08:11,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-15 22:08:11,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:11,524 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1] [2021-12-15 22:08:11,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:08:11,525 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:11,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:11,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1893411240, now seen corresponding path program 1 times [2021-12-15 22:08:11,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:11,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682017277] [2021-12-15 22:08:11,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:11,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 22:08:11,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:11,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682017277] [2021-12-15 22:08:11,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682017277] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:11,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:08:11,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:08:11,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060936644] [2021-12-15 22:08:11,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:11,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:11,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:11,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:11,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:11,663 INFO L87 Difference]: Start difference. First operand 870 states and 1314 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:11,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:11,851 INFO L93 Difference]: Finished difference Result 2583 states and 3908 transitions. [2021-12-15 22:08:11,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:11,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 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 188 [2021-12-15 22:08:11,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:11,856 INFO L225 Difference]: With dead ends: 2583 [2021-12-15 22:08:11,856 INFO L226 Difference]: Without dead ends: 1715 [2021-12-15 22:08:11,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:11,862 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, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:11,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 585 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 22:08:11,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-12-15 22:08:11,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1711. [2021-12-15 22:08:11,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1710 states have (on average 1.5140350877192983) internal successors, (2589), 1710 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:11,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 2589 transitions. [2021-12-15 22:08:11,894 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 2589 transitions. Word has length 188 [2021-12-15 22:08:11,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:11,895 INFO L470 AbstractCegarLoop]: Abstraction has 1711 states and 2589 transitions. [2021-12-15 22:08:11,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:11,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 2589 transitions. [2021-12-15 22:08:11,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-15 22:08:11,899 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:11,900 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 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] [2021-12-15 22:08:11,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:08:11,900 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:11,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:11,901 INFO L85 PathProgramCache]: Analyzing trace with hash 651483907, now seen corresponding path program 1 times [2021-12-15 22:08:11,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:11,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891345477] [2021-12-15 22:08:11,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:11,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:11,956 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:08:11,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:11,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891345477] [2021-12-15 22:08:11,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891345477] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:11,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665509366] [2021-12-15 22:08:11,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:11,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:11,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:11,959 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:08:12,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 22:08:12,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:12,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:08:12,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:12,348 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 22:08:12,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:12,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665509366] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:12,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:12,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-15 22:08:12,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474440253] [2021-12-15 22:08:12,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:12,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:12,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:12,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:12,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:12,351 INFO L87 Difference]: Start difference. First operand 1711 states and 2589 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:12,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:12,955 INFO L93 Difference]: Finished difference Result 5050 states and 7657 transitions. [2021-12-15 22:08:12,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:12,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 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 190 [2021-12-15 22:08:12,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:12,965 INFO L225 Difference]: With dead ends: 5050 [2021-12-15 22:08:12,965 INFO L226 Difference]: Without dead ends: 3341 [2021-12-15 22:08:12,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:12,973 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 230 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:12,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 417 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:08:12,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3341 states. [2021-12-15 22:08:13,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3341 to 3338. [2021-12-15 22:08:13,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3338 states, 3337 states have (on average 1.3359304764758766) internal successors, (4458), 3337 states have internal predecessors, (4458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:13,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 4458 transitions. [2021-12-15 22:08:13,093 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 4458 transitions. Word has length 190 [2021-12-15 22:08:13,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:13,093 INFO L470 AbstractCegarLoop]: Abstraction has 3338 states and 4458 transitions. [2021-12-15 22:08:13,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:13,093 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 4458 transitions. [2021-12-15 22:08:13,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-15 22:08:13,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:13,098 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:13,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 22:08:13,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:13,316 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:13,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:13,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1330338245, now seen corresponding path program 1 times [2021-12-15 22:08:13,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:13,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980756266] [2021-12-15 22:08:13,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:13,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:13,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:08:13,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:13,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980756266] [2021-12-15 22:08:13,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980756266] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:13,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:08:13,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:08:13,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708032527] [2021-12-15 22:08:13,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:13,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:13,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:13,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:13,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:13,367 INFO L87 Difference]: Start difference. First operand 3338 states and 4458 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 22:08:13,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:13,959 INFO L93 Difference]: Finished difference Result 9969 states and 13324 transitions. [2021-12-15 22:08:13,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:13,960 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 22:08:13,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:13,979 INFO L225 Difference]: With dead ends: 9969 [2021-12-15 22:08:13,979 INFO L226 Difference]: Without dead ends: 6633 [2021-12-15 22:08:13,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:13,983 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 259 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:13,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 123 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 22:08:13,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6633 states. [2021-12-15 22:08:14,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6633 to 6621. [2021-12-15 22:08:14,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6621 states, 6620 states have (on average 1.322809667673716) internal successors, (8757), 6620 states have internal predecessors, (8757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:14,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6621 states to 6621 states and 8757 transitions. [2021-12-15 22:08:14,105 INFO L78 Accepts]: Start accepts. Automaton has 6621 states and 8757 transitions. Word has length 191 [2021-12-15 22:08:14,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:14,106 INFO L470 AbstractCegarLoop]: Abstraction has 6621 states and 8757 transitions. [2021-12-15 22:08:14,106 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 22:08:14,106 INFO L276 IsEmpty]: Start isEmpty. Operand 6621 states and 8757 transitions. [2021-12-15 22:08:14,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-15 22:08:14,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:14,114 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:14,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:08:14,114 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:14,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:14,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1613786835, now seen corresponding path program 1 times [2021-12-15 22:08:14,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:14,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483102478] [2021-12-15 22:08:14,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:14,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:14,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:14,168 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:08:14,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:14,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483102478] [2021-12-15 22:08:14,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483102478] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:14,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:08:14,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:08:14,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970823051] [2021-12-15 22:08:14,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:14,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:14,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:14,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:14,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:14,171 INFO L87 Difference]: Start difference. First operand 6621 states and 8757 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:14,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:14,771 INFO L93 Difference]: Finished difference Result 17349 states and 23252 transitions. [2021-12-15 22:08:14,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:14,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2021-12-15 22:08:14,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:14,800 INFO L225 Difference]: With dead ends: 17349 [2021-12-15 22:08:14,801 INFO L226 Difference]: Without dead ends: 10730 [2021-12-15 22:08:14,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:14,810 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 217 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:14,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 153 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 22:08:14,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10730 states. [2021-12-15 22:08:14,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10730 to 9264. [2021-12-15 22:08:14,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9264 states, 9263 states have (on average 1.379466695455036) internal successors, (12778), 9263 states have internal predecessors, (12778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:14,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9264 states to 9264 states and 12778 transitions. [2021-12-15 22:08:14,976 INFO L78 Accepts]: Start accepts. Automaton has 9264 states and 12778 transitions. Word has length 194 [2021-12-15 22:08:14,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:14,977 INFO L470 AbstractCegarLoop]: Abstraction has 9264 states and 12778 transitions. [2021-12-15 22:08:14,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:14,977 INFO L276 IsEmpty]: Start isEmpty. Operand 9264 states and 12778 transitions. [2021-12-15 22:08:14,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-15 22:08:14,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:14,988 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:14,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:08:14,988 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:14,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:14,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1523843920, now seen corresponding path program 1 times [2021-12-15 22:08:14,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:14,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187360988] [2021-12-15 22:08:14,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:14,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:15,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-15 22:08:15,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:15,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187360988] [2021-12-15 22:08:15,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187360988] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:15,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:08:15,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:08:15,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925720283] [2021-12-15 22:08:15,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:15,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:15,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:15,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:15,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:15,064 INFO L87 Difference]: Start difference. First operand 9264 states and 12778 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 22:08:15,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:15,418 INFO L93 Difference]: Finished difference Result 16827 states and 23048 transitions. [2021-12-15 22:08:15,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:15,419 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 203 [2021-12-15 22:08:15,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:15,436 INFO L225 Difference]: With dead ends: 16827 [2021-12-15 22:08:15,437 INFO L226 Difference]: Without dead ends: 7971 [2021-12-15 22:08:15,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:15,444 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 321 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 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, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:15,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 22:08:15,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7971 states. [2021-12-15 22:08:15,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7971 to 7971. [2021-12-15 22:08:15,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7971 states, 7970 states have (on average 1.3189460476787955) internal successors, (10512), 7970 states have internal predecessors, (10512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:15,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7971 states to 7971 states and 10512 transitions. [2021-12-15 22:08:15,559 INFO L78 Accepts]: Start accepts. Automaton has 7971 states and 10512 transitions. Word has length 203 [2021-12-15 22:08:15,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:15,559 INFO L470 AbstractCegarLoop]: Abstraction has 7971 states and 10512 transitions. [2021-12-15 22:08:15,559 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 22:08:15,559 INFO L276 IsEmpty]: Start isEmpty. Operand 7971 states and 10512 transitions. [2021-12-15 22:08:15,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-15 22:08:15,568 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:15,568 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:15,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 22:08:15,569 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:15,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:15,569 INFO L85 PathProgramCache]: Analyzing trace with hash 441011150, now seen corresponding path program 1 times [2021-12-15 22:08:15,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:15,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319776180] [2021-12-15 22:08:15,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:15,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:15,632 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:08:15,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:15,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319776180] [2021-12-15 22:08:15,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319776180] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:15,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630915658] [2021-12-15 22:08:15,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:15,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:15,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:15,634 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 22:08:15,663 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 22:08:15,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:15,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:08:15,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:16,074 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-15 22:08:16,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:16,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630915658] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:16,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:16,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 22:08:16,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520278530] [2021-12-15 22:08:16,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:16,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:16,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:16,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:16,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:16,077 INFO L87 Difference]: Start difference. First operand 7971 states and 10512 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:16,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:16,609 INFO L93 Difference]: Finished difference Result 22861 states and 30269 transitions. [2021-12-15 22:08:16,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:16,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 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 205 [2021-12-15 22:08:16,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:16,630 INFO L225 Difference]: With dead ends: 22861 [2021-12-15 22:08:16,630 INFO L226 Difference]: Without dead ends: 14892 [2021-12-15 22:08:16,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 204 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 22:08:16,640 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 60 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:16,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 102 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 22:08:16,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14892 states. [2021-12-15 22:08:16,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14892 to 11228. [2021-12-15 22:08:16,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11228 states, 11227 states have (on average 1.317805290816781) internal successors, (14795), 11227 states have internal predecessors, (14795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:16,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11228 states to 11228 states and 14795 transitions. [2021-12-15 22:08:16,847 INFO L78 Accepts]: Start accepts. Automaton has 11228 states and 14795 transitions. Word has length 205 [2021-12-15 22:08:16,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:16,848 INFO L470 AbstractCegarLoop]: Abstraction has 11228 states and 14795 transitions. [2021-12-15 22:08:16,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:16,848 INFO L276 IsEmpty]: Start isEmpty. Operand 11228 states and 14795 transitions. [2021-12-15 22:08:16,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-12-15 22:08:16,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:16,862 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:16,891 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 22:08:17,078 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,SelfDestructingSolverStorable7 [2021-12-15 22:08:17,079 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:17,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:17,079 INFO L85 PathProgramCache]: Analyzing trace with hash -236027744, now seen corresponding path program 1 times [2021-12-15 22:08:17,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:17,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797503319] [2021-12-15 22:08:17,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:17,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 22:08:17,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:17,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797503319] [2021-12-15 22:08:17,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797503319] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:17,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:08:17,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:08:17,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47074181] [2021-12-15 22:08:17,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:17,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:17,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:17,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:17,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:17,150 INFO L87 Difference]: Start difference. First operand 11228 states and 14795 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 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 22:08:17,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:17,714 INFO L93 Difference]: Finished difference Result 27557 states and 36521 transitions. [2021-12-15 22:08:17,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:17,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 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 211 [2021-12-15 22:08:17,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:17,738 INFO L225 Difference]: With dead ends: 27557 [2021-12-15 22:08:17,738 INFO L226 Difference]: Without dead ends: 16331 [2021-12-15 22:08:17,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:17,751 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 201 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:17,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 131 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 22:08:17,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16331 states. [2021-12-15 22:08:18,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16331 to 15916. [2021-12-15 22:08:18,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15916 states, 15915 states have (on average 1.3334590009425071) internal successors, (21222), 15915 states have internal predecessors, (21222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:18,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15916 states to 15916 states and 21222 transitions. [2021-12-15 22:08:18,076 INFO L78 Accepts]: Start accepts. Automaton has 15916 states and 21222 transitions. Word has length 211 [2021-12-15 22:08:18,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:18,077 INFO L470 AbstractCegarLoop]: Abstraction has 15916 states and 21222 transitions. [2021-12-15 22:08:18,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 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 22:08:18,077 INFO L276 IsEmpty]: Start isEmpty. Operand 15916 states and 21222 transitions. [2021-12-15 22:08:18,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-12-15 22:08:18,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:18,088 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:18,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 22:08:18,089 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:18,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:18,090 INFO L85 PathProgramCache]: Analyzing trace with hash 2021485274, now seen corresponding path program 1 times [2021-12-15 22:08:18,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:18,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056711031] [2021-12-15 22:08:18,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:18,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:18,148 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-15 22:08:18,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:18,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056711031] [2021-12-15 22:08:18,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056711031] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:18,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:08:18,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:08:18,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987679232] [2021-12-15 22:08:18,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:18,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:18,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:18,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:18,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:18,150 INFO L87 Difference]: Start difference. First operand 15916 states and 21222 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:18,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:18,752 INFO L93 Difference]: Finished difference Result 37532 states and 49750 transitions. [2021-12-15 22:08:18,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:18,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 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 213 [2021-12-15 22:08:18,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:18,786 INFO L225 Difference]: With dead ends: 37532 [2021-12-15 22:08:18,786 INFO L226 Difference]: Without dead ends: 22025 [2021-12-15 22:08:18,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:18,803 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 202 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:18,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 118 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 22:08:18,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22025 states. [2021-12-15 22:08:19,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22025 to 20800. [2021-12-15 22:08:19,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20800 states, 20799 states have (on average 1.307851339006683) internal successors, (27202), 20799 states have internal predecessors, (27202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:19,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20800 states to 20800 states and 27202 transitions. [2021-12-15 22:08:19,132 INFO L78 Accepts]: Start accepts. Automaton has 20800 states and 27202 transitions. Word has length 213 [2021-12-15 22:08:19,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:19,132 INFO L470 AbstractCegarLoop]: Abstraction has 20800 states and 27202 transitions. [2021-12-15 22:08:19,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:19,133 INFO L276 IsEmpty]: Start isEmpty. Operand 20800 states and 27202 transitions. [2021-12-15 22:08:19,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-12-15 22:08:19,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:19,146 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, 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] [2021-12-15 22:08:19,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 22:08:19,147 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:19,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:19,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1629645138, now seen corresponding path program 1 times [2021-12-15 22:08:19,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:19,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581805434] [2021-12-15 22:08:19,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:19,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 22:08:19,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:19,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581805434] [2021-12-15 22:08:19,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581805434] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:19,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:08:19,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:08:19,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790086396] [2021-12-15 22:08:19,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:19,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:19,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:19,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:19,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:19,217 INFO L87 Difference]: Start difference. First operand 20800 states and 27202 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:19,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:19,968 INFO L93 Difference]: Finished difference Result 39351 states and 50855 transitions. [2021-12-15 22:08:19,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:19,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 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 222 [2021-12-15 22:08:19,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:20,003 INFO L225 Difference]: With dead ends: 39351 [2021-12-15 22:08:20,003 INFO L226 Difference]: Without dead ends: 25486 [2021-12-15 22:08:20,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:20,012 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 186 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:20,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 128 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 22:08:20,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25486 states. [2021-12-15 22:08:20,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25486 to 25481. [2021-12-15 22:08:20,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25481 states, 25480 states have (on average 1.2957613814756672) internal successors, (33016), 25480 states have internal predecessors, (33016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:20,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25481 states to 25481 states and 33016 transitions. [2021-12-15 22:08:20,471 INFO L78 Accepts]: Start accepts. Automaton has 25481 states and 33016 transitions. Word has length 222 [2021-12-15 22:08:20,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:20,471 INFO L470 AbstractCegarLoop]: Abstraction has 25481 states and 33016 transitions. [2021-12-15 22:08:20,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:20,472 INFO L276 IsEmpty]: Start isEmpty. Operand 25481 states and 33016 transitions. [2021-12-15 22:08:20,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-12-15 22:08:20,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:20,491 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:08:20,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 22:08:20,492 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:20,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:20,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1064424771, now seen corresponding path program 2 times [2021-12-15 22:08:20,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:20,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128095396] [2021-12-15 22:08:20,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:20,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-15 22:08:20,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:20,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128095396] [2021-12-15 22:08:20,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128095396] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:20,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:08:20,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:08:20,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871047438] [2021-12-15 22:08:20,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:20,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:20,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:20,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:20,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:20,548 INFO L87 Difference]: Start difference. First operand 25481 states and 33016 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:21,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:21,232 INFO L93 Difference]: Finished difference Result 59483 states and 78631 transitions. [2021-12-15 22:08:21,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:21,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2021-12-15 22:08:21,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:21,278 INFO L225 Difference]: With dead ends: 59483 [2021-12-15 22:08:21,278 INFO L226 Difference]: Without dead ends: 34004 [2021-12-15 22:08:21,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:21,308 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 214 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:21,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 149 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 22:08:21,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34004 states. [2021-12-15 22:08:21,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34004 to 34004. [2021-12-15 22:08:21,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34004 states, 34003 states have (on average 1.2248919213010616) internal successors, (41650), 34003 states have internal predecessors, (41650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:22,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34004 states to 34004 states and 41650 transitions. [2021-12-15 22:08:22,039 INFO L78 Accepts]: Start accepts. Automaton has 34004 states and 41650 transitions. Word has length 229 [2021-12-15 22:08:22,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:22,040 INFO L470 AbstractCegarLoop]: Abstraction has 34004 states and 41650 transitions. [2021-12-15 22:08:22,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:22,040 INFO L276 IsEmpty]: Start isEmpty. Operand 34004 states and 41650 transitions. [2021-12-15 22:08:22,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-12-15 22:08:22,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:22,057 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:22,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 22:08:22,057 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:22,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:22,058 INFO L85 PathProgramCache]: Analyzing trace with hash -480187620, now seen corresponding path program 1 times [2021-12-15 22:08:22,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:22,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491925771] [2021-12-15 22:08:22,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:22,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:22,128 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 22:08:22,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:22,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491925771] [2021-12-15 22:08:22,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491925771] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:22,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:08:22,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:08:22,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656739068] [2021-12-15 22:08:22,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:22,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:22,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:22,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:22,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:22,130 INFO L87 Difference]: Start difference. First operand 34004 states and 41650 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:22,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:22,954 INFO L93 Difference]: Finished difference Result 62301 states and 75904 transitions. [2021-12-15 22:08:22,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:22,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 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 238 [2021-12-15 22:08:22,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:22,994 INFO L225 Difference]: With dead ends: 62301 [2021-12-15 22:08:22,995 INFO L226 Difference]: Without dead ends: 39289 [2021-12-15 22:08:23,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:23,007 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 154 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:23,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 165 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:08:23,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39289 states. [2021-12-15 22:08:23,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39289 to 39282. [2021-12-15 22:08:23,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39282 states, 39281 states have (on average 1.215600417504646) internal successors, (47750), 39281 states have internal predecessors, (47750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:23,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39282 states to 39282 states and 47750 transitions. [2021-12-15 22:08:23,481 INFO L78 Accepts]: Start accepts. Automaton has 39282 states and 47750 transitions. Word has length 238 [2021-12-15 22:08:23,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:23,481 INFO L470 AbstractCegarLoop]: Abstraction has 39282 states and 47750 transitions. [2021-12-15 22:08:23,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:23,481 INFO L276 IsEmpty]: Start isEmpty. Operand 39282 states and 47750 transitions. [2021-12-15 22:08:23,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-12-15 22:08:23,497 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:23,498 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, 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] [2021-12-15 22:08:23,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 22:08:23,498 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:23,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:23,499 INFO L85 PathProgramCache]: Analyzing trace with hash 342018478, now seen corresponding path program 1 times [2021-12-15 22:08:23,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:23,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934314878] [2021-12-15 22:08:23,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:23,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:08:23,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:23,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934314878] [2021-12-15 22:08:23,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934314878] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:23,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:08:23,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:08:23,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769028712] [2021-12-15 22:08:23,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:23,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:23,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:23,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:23,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:23,585 INFO L87 Difference]: Start difference. First operand 39282 states and 47750 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 2 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:24,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:24,282 INFO L93 Difference]: Finished difference Result 67371 states and 81595 transitions. [2021-12-15 22:08:24,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:24,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 2 states have internal predecessors, (242), 0 states have call successors, (0), 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 242 [2021-12-15 22:08:24,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:24,326 INFO L225 Difference]: With dead ends: 67371 [2021-12-15 22:08:24,327 INFO L226 Difference]: Without dead ends: 39690 [2021-12-15 22:08:24,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:24,343 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 133 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:24,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 152 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 22:08:24,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39690 states. [2021-12-15 22:08:24,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39690 to 39688. [2021-12-15 22:08:24,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39688 states, 39687 states have (on average 1.214604278479099) internal successors, (48204), 39687 states have internal predecessors, (48204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:24,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39688 states to 39688 states and 48204 transitions. [2021-12-15 22:08:24,788 INFO L78 Accepts]: Start accepts. Automaton has 39688 states and 48204 transitions. Word has length 242 [2021-12-15 22:08:24,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:24,788 INFO L470 AbstractCegarLoop]: Abstraction has 39688 states and 48204 transitions. [2021-12-15 22:08:24,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 2 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:24,789 INFO L276 IsEmpty]: Start isEmpty. Operand 39688 states and 48204 transitions. [2021-12-15 22:08:24,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-12-15 22:08:24,805 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:24,806 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:24,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 22:08:24,806 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:24,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:24,807 INFO L85 PathProgramCache]: Analyzing trace with hash -735414649, now seen corresponding path program 2 times [2021-12-15 22:08:24,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:24,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691938706] [2021-12-15 22:08:24,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:24,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 82 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 22:08:24,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:24,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691938706] [2021-12-15 22:08:24,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691938706] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:24,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355990876] [2021-12-15 22:08:24,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 22:08:24,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:24,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:24,880 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 22:08:24,896 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 22:08:25,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 22:08:25,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 22:08:25,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 22:08:25,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 22:08:25,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:25,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355990876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:25,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:25,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-12-15 22:08:25,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103827781] [2021-12-15 22:08:25,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:25,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:25,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:25,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:25,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:08:25,478 INFO L87 Difference]: Start difference. First operand 39688 states and 48204 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:26,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:26,362 INFO L93 Difference]: Finished difference Result 84859 states and 103561 transitions. [2021-12-15 22:08:26,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:26,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 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 245 [2021-12-15 22:08:26,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:26,421 INFO L225 Difference]: With dead ends: 84859 [2021-12-15 22:08:26,422 INFO L226 Difference]: Without dead ends: 46798 [2021-12-15 22:08:26,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:08:26,454 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 155 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:26,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 159 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:08:26,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46798 states. [2021-12-15 22:08:26,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46798 to 45781. [2021-12-15 22:08:27,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45781 states, 45780 states have (on average 1.2005242463958061) internal successors, (54960), 45780 states have internal predecessors, (54960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:27,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45781 states to 45781 states and 54960 transitions. [2021-12-15 22:08:27,056 INFO L78 Accepts]: Start accepts. Automaton has 45781 states and 54960 transitions. Word has length 245 [2021-12-15 22:08:27,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:27,057 INFO L470 AbstractCegarLoop]: Abstraction has 45781 states and 54960 transitions. [2021-12-15 22:08:27,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:27,057 INFO L276 IsEmpty]: Start isEmpty. Operand 45781 states and 54960 transitions. [2021-12-15 22:08:27,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-12-15 22:08:27,079 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:27,080 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:27,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 22:08:27,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:27,296 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:27,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:27,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1915945221, now seen corresponding path program 1 times [2021-12-15 22:08:27,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:27,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47999712] [2021-12-15 22:08:27,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:27,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:27,525 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-15 22:08:27,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:27,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47999712] [2021-12-15 22:08:27,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47999712] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:27,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:08:27,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:08:27,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492226683] [2021-12-15 22:08:27,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:27,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:08:27,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:27,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:08:27,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:08:27,528 INFO L87 Difference]: Start difference. First operand 45781 states and 54960 transitions. Second operand has 4 states, 4 states have (on average 63.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:28,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:28,353 INFO L93 Difference]: Finished difference Result 98449 states and 119091 transitions. [2021-12-15 22:08:28,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:08:28,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 63.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 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 275 [2021-12-15 22:08:28,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:28,421 INFO L225 Difference]: With dead ends: 98449 [2021-12-15 22:08:28,422 INFO L226 Difference]: Without dead ends: 55109 [2021-12-15 22:08:28,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:08:28,457 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 434 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:28,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 56 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:08:28,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55109 states. [2021-12-15 22:08:29,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55109 to 55109. [2021-12-15 22:08:29,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55109 states, 55108 states have (on average 1.1655476518835741) internal successors, (64231), 55108 states have internal predecessors, (64231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:29,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55109 states to 55109 states and 64231 transitions. [2021-12-15 22:08:29,318 INFO L78 Accepts]: Start accepts. Automaton has 55109 states and 64231 transitions. Word has length 275 [2021-12-15 22:08:29,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:29,318 INFO L470 AbstractCegarLoop]: Abstraction has 55109 states and 64231 transitions. [2021-12-15 22:08:29,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:29,319 INFO L276 IsEmpty]: Start isEmpty. Operand 55109 states and 64231 transitions. [2021-12-15 22:08:29,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-12-15 22:08:29,352 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:29,352 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:08:29,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 22:08:29,353 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:29,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:29,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1978795867, now seen corresponding path program 1 times [2021-12-15 22:08:29,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:29,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979929900] [2021-12-15 22:08:29,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:29,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-15 22:08:29,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:29,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979929900] [2021-12-15 22:08:29,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979929900] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:29,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:08:29,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:08:29,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618073956] [2021-12-15 22:08:29,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:29,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:29,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:29,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:29,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:29,431 INFO L87 Difference]: Start difference. First operand 55109 states and 64231 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:30,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:30,309 INFO L93 Difference]: Finished difference Result 102286 states and 119159 transitions. [2021-12-15 22:08:30,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:30,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 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 276 [2021-12-15 22:08:30,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:30,367 INFO L225 Difference]: With dead ends: 102286 [2021-12-15 22:08:30,367 INFO L226 Difference]: Without dead ends: 55515 [2021-12-15 22:08:30,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:30,387 INFO L933 BasicCegarLoop]: 143 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, 159 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 22:08:30,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 159 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 22:08:30,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55515 states. [2021-12-15 22:08:30,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55515 to 55515. [2021-12-15 22:08:30,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55515 states, 55514 states have (on average 1.1645891126562669) internal successors, (64651), 55514 states have internal predecessors, (64651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:31,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55515 states to 55515 states and 64651 transitions. [2021-12-15 22:08:31,006 INFO L78 Accepts]: Start accepts. Automaton has 55515 states and 64651 transitions. Word has length 276 [2021-12-15 22:08:31,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:31,007 INFO L470 AbstractCegarLoop]: Abstraction has 55515 states and 64651 transitions. [2021-12-15 22:08:31,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:31,007 INFO L276 IsEmpty]: Start isEmpty. Operand 55515 states and 64651 transitions. [2021-12-15 22:08:31,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-12-15 22:08:31,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:31,036 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, 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] [2021-12-15 22:08:31,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 22:08:31,036 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:31,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:31,036 INFO L85 PathProgramCache]: Analyzing trace with hash 633248720, now seen corresponding path program 1 times [2021-12-15 22:08:31,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:31,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551278914] [2021-12-15 22:08:31,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:31,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:31,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:31,100 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-15 22:08:31,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:31,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551278914] [2021-12-15 22:08:31,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551278914] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:31,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853931143] [2021-12-15 22:08:31,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:31,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:31,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:31,116 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 22:08:31,143 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 22:08:31,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:31,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:08:31,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:31,851 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-12-15 22:08:31,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:31,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853931143] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:31,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:31,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 22:08:31,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709256245] [2021-12-15 22:08:31,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:31,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:31,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:31,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:31,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:31,853 INFO L87 Difference]: Start difference. First operand 55515 states and 64651 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:32,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:32,683 INFO L93 Difference]: Finished difference Result 131575 states and 153855 transitions. [2021-12-15 22:08:32,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:32,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 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 283 [2021-12-15 22:08:32,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:32,781 INFO L225 Difference]: With dead ends: 131575 [2021-12-15 22:08:32,782 INFO L226 Difference]: Without dead ends: 78704 [2021-12-15 22:08:32,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 282 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 22:08:32,825 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 86 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:32,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 127 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 22:08:33,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78704 states. [2021-12-15 22:08:33,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78704 to 78697. [2021-12-15 22:08:33,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78697 states, 78696 states have (on average 1.1500965741587883) internal successors, (90508), 78696 states have internal predecessors, (90508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:33,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78697 states to 78697 states and 90508 transitions. [2021-12-15 22:08:33,962 INFO L78 Accepts]: Start accepts. Automaton has 78697 states and 90508 transitions. Word has length 283 [2021-12-15 22:08:33,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:33,962 INFO L470 AbstractCegarLoop]: Abstraction has 78697 states and 90508 transitions. [2021-12-15 22:08:33,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:33,963 INFO L276 IsEmpty]: Start isEmpty. Operand 78697 states and 90508 transitions. [2021-12-15 22:08:34,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-12-15 22:08:34,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:34,002 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:34,018 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 22:08:34,215 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,SelfDestructingSolverStorable17 [2021-12-15 22:08:34,216 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:34,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:34,216 INFO L85 PathProgramCache]: Analyzing trace with hash 104456279, now seen corresponding path program 1 times [2021-12-15 22:08:34,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:34,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751728012] [2021-12-15 22:08:34,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:34,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:34,291 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 104 proven. 12 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-12-15 22:08:34,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:34,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751728012] [2021-12-15 22:08:34,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751728012] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:34,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964759637] [2021-12-15 22:08:34,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:34,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:34,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:34,300 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 22:08:34,301 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 22:08:34,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:34,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:08:34,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 22:08:34,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:34,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964759637] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:34,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:34,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 22:08:34,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829447164] [2021-12-15 22:08:34,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:34,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:34,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:34,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:34,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:34,967 INFO L87 Difference]: Start difference. First operand 78697 states and 90508 transitions. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:35,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:35,981 INFO L93 Difference]: Finished difference Result 204356 states and 235648 transitions. [2021-12-15 22:08:35,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:35,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 306 [2021-12-15 22:08:35,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:36,157 INFO L225 Difference]: With dead ends: 204356 [2021-12-15 22:08:36,158 INFO L226 Difference]: Without dead ends: 128506 [2021-12-15 22:08:36,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 305 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 22:08:36,231 INFO L933 BasicCegarLoop]: 578 mSDtfsCounter, 224 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:36,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 804 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 22:08:36,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128506 states. [2021-12-15 22:08:38,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128506 to 128500. [2021-12-15 22:08:38,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128500 states, 128499 states have (on average 1.1403979797508152) internal successors, (146540), 128499 states have internal predecessors, (146540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:38,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128500 states to 128500 states and 146540 transitions. [2021-12-15 22:08:38,806 INFO L78 Accepts]: Start accepts. Automaton has 128500 states and 146540 transitions. Word has length 306 [2021-12-15 22:08:38,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:38,825 INFO L470 AbstractCegarLoop]: Abstraction has 128500 states and 146540 transitions. [2021-12-15 22:08:38,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:38,826 INFO L276 IsEmpty]: Start isEmpty. Operand 128500 states and 146540 transitions. [2021-12-15 22:08:38,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-12-15 22:08:38,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:38,891 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:38,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 22:08:39,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:39,109 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:39,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:39,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1911611869, now seen corresponding path program 1 times [2021-12-15 22:08:39,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:39,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746832111] [2021-12-15 22:08:39,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:39,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 143 proven. 3 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-15 22:08:39,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:39,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746832111] [2021-12-15 22:08:39,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746832111] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:39,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763402562] [2021-12-15 22:08:39,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:39,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:39,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:39,213 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 22:08:39,227 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 22:08:39,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:39,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:08:39,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:39,757 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-15 22:08:39,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:39,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763402562] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:39,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:39,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 22:08:39,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24427251] [2021-12-15 22:08:39,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:39,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:39,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:39,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:39,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:39,761 INFO L87 Difference]: Start difference. First operand 128500 states and 146540 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:40,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:40,970 INFO L93 Difference]: Finished difference Result 253748 states and 289415 transitions. [2021-12-15 22:08:40,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:40,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 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 22:08:40,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:41,129 INFO L225 Difference]: With dead ends: 253748 [2021-12-15 22:08:41,129 INFO L226 Difference]: Without dead ends: 127078 [2021-12-15 22:08:41,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 307 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 22:08:41,171 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 92 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:41,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 290 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 22:08:41,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127078 states. [2021-12-15 22:08:42,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127078 to 122600. [2021-12-15 22:08:42,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122600 states, 122599 states have (on average 1.12856548585225) internal successors, (138361), 122599 states have internal predecessors, (138361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:43,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122600 states to 122600 states and 138361 transitions. [2021-12-15 22:08:43,206 INFO L78 Accepts]: Start accepts. Automaton has 122600 states and 138361 transitions. Word has length 308 [2021-12-15 22:08:43,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:43,206 INFO L470 AbstractCegarLoop]: Abstraction has 122600 states and 138361 transitions. [2021-12-15 22:08:43,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:43,207 INFO L276 IsEmpty]: Start isEmpty. Operand 122600 states and 138361 transitions. [2021-12-15 22:08:43,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2021-12-15 22:08:43,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:43,288 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:43,307 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 22:08:43,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:43,506 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:43,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:43,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1411476975, now seen corresponding path program 1 times [2021-12-15 22:08:43,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:43,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66366520] [2021-12-15 22:08:43,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:43,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:43,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-15 22:08:43,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:43,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66366520] [2021-12-15 22:08:43,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66366520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:43,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:08:43,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:08:43,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146779541] [2021-12-15 22:08:43,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:43,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:43,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:43,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:43,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:43,609 INFO L87 Difference]: Start difference. First operand 122600 states and 138361 transitions. Second operand has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:44,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:44,640 INFO L93 Difference]: Finished difference Result 216523 states and 243704 transitions. [2021-12-15 22:08:44,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:44,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 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 317 [2021-12-15 22:08:44,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:45,040 INFO L225 Difference]: With dead ends: 216523 [2021-12-15 22:08:45,041 INFO L226 Difference]: Without dead ends: 95551 [2021-12-15 22:08:45,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:45,087 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 229 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:45,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 327 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 22:08:45,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95551 states. [2021-12-15 22:08:45,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95551 to 91073. [2021-12-15 22:08:46,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91073 states, 91072 states have (on average 1.104719342937456) internal successors, (100609), 91072 states have internal predecessors, (100609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:46,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91073 states to 91073 states and 100609 transitions. [2021-12-15 22:08:46,150 INFO L78 Accepts]: Start accepts. Automaton has 91073 states and 100609 transitions. Word has length 317 [2021-12-15 22:08:46,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:46,150 INFO L470 AbstractCegarLoop]: Abstraction has 91073 states and 100609 transitions. [2021-12-15 22:08:46,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:46,151 INFO L276 IsEmpty]: Start isEmpty. Operand 91073 states and 100609 transitions. [2021-12-15 22:08:46,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2021-12-15 22:08:46,212 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:46,212 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:46,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-15 22:08:46,213 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:46,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:46,213 INFO L85 PathProgramCache]: Analyzing trace with hash -2067797645, now seen corresponding path program 1 times [2021-12-15 22:08:46,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:46,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399184664] [2021-12-15 22:08:46,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:46,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:46,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:46,319 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-15 22:08:46,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:46,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399184664] [2021-12-15 22:08:46,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399184664] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:46,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:08:46,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:08:46,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986792260] [2021-12-15 22:08:46,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:46,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:08:46,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:46,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:08:46,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:08:46,321 INFO L87 Difference]: Start difference. First operand 91073 states and 100609 transitions. Second operand has 4 states, 4 states have (on average 78.25) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:47,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:47,613 INFO L93 Difference]: Finished difference Result 230325 states and 254560 transitions. [2021-12-15 22:08:47,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:08:47,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 78.25) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 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 349 [2021-12-15 22:08:47,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:47,776 INFO L225 Difference]: With dead ends: 230325 [2021-12-15 22:08:47,777 INFO L226 Difference]: Without dead ends: 141286 [2021-12-15 22:08:47,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:08:47,823 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 796 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:47,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [796 Valid, 49 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:08:47,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141286 states. [2021-12-15 22:08:49,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141286 to 138444. [2021-12-15 22:08:49,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138444 states, 138443 states have (on average 1.106570935330786) internal successors, (153197), 138443 states have internal predecessors, (153197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:49,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138444 states to 138444 states and 153197 transitions. [2021-12-15 22:08:49,981 INFO L78 Accepts]: Start accepts. Automaton has 138444 states and 153197 transitions. Word has length 349 [2021-12-15 22:08:49,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:49,981 INFO L470 AbstractCegarLoop]: Abstraction has 138444 states and 153197 transitions. [2021-12-15 22:08:49,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.25) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:49,982 INFO L276 IsEmpty]: Start isEmpty. Operand 138444 states and 153197 transitions. [2021-12-15 22:08:50,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-12-15 22:08:50,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:50,111 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:08:50,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-15 22:08:50,111 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:50,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:50,112 INFO L85 PathProgramCache]: Analyzing trace with hash -805353426, now seen corresponding path program 1 times [2021-12-15 22:08:50,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:50,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934809154] [2021-12-15 22:08:50,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:50,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:50,198 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 104 proven. 12 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-12-15 22:08:50,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:50,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934809154] [2021-12-15 22:08:50,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934809154] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:50,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430782834] [2021-12-15 22:08:50,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:50,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:50,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:50,216 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 22:08:50,217 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 22:08:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:50,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:08:50,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:50,986 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 324 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-15 22:08:50,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:50,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430782834] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:50,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:50,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 22:08:50,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144644981] [2021-12-15 22:08:50,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:50,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:50,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:50,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:50,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:50,988 INFO L87 Difference]: Start difference. First operand 138444 states and 153197 transitions. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:52,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:52,392 INFO L93 Difference]: Finished difference Result 269567 states and 298351 transitions. [2021-12-15 22:08:52,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:52,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 389 [2021-12-15 22:08:52,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:52,570 INFO L225 Difference]: With dead ends: 269567 [2021-12-15 22:08:52,571 INFO L226 Difference]: Without dead ends: 133157 [2021-12-15 22:08:52,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 388 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 22:08:52,644 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 117 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:52,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 94 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 22:08:52,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133157 states. [2021-12-15 22:08:54,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133157 to 107362. [2021-12-15 22:08:54,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107362 states, 107361 states have (on average 1.0865677480649398) internal successors, (116655), 107361 states have internal predecessors, (116655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:54,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107362 states to 107362 states and 116655 transitions. [2021-12-15 22:08:54,722 INFO L78 Accepts]: Start accepts. Automaton has 107362 states and 116655 transitions. Word has length 389 [2021-12-15 22:08:54,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:54,722 INFO L470 AbstractCegarLoop]: Abstraction has 107362 states and 116655 transitions. [2021-12-15 22:08:54,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:54,722 INFO L276 IsEmpty]: Start isEmpty. Operand 107362 states and 116655 transitions. [2021-12-15 22:08:54,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-12-15 22:08:54,813 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:54,813 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 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] [2021-12-15 22:08:54,835 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 22:08:55,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:55,032 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:55,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:55,033 INFO L85 PathProgramCache]: Analyzing trace with hash 402375071, now seen corresponding path program 1 times [2021-12-15 22:08:55,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:55,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925810741] [2021-12-15 22:08:55,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:55,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:55,140 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 130 proven. 12 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2021-12-15 22:08:55,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:55,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925810741] [2021-12-15 22:08:55,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925810741] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:55,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123451551] [2021-12-15 22:08:55,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:55,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:55,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:55,156 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 22:08:55,157 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 22:08:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:55,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 22:08:55,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 328 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-12-15 22:08:55,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:55,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123451551] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:55,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:55,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 22:08:55,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077861606] [2021-12-15 22:08:55,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:55,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:55,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:55,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:55,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:55,866 INFO L87 Difference]: Start difference. First operand 107362 states and 116655 transitions. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:57,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:57,038 INFO L93 Difference]: Finished difference Result 278752 states and 303416 transitions. [2021-12-15 22:08:57,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:57,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 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 430 [2021-12-15 22:08:57,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:57,268 INFO L225 Difference]: With dead ends: 278752 [2021-12-15 22:08:57,268 INFO L226 Difference]: Without dead ends: 173424 [2021-12-15 22:08:57,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 429 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 22:08:57,322 INFO L933 BasicCegarLoop]: 609 mSDtfsCounter, 274 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:57,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 868 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 22:08:57,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173424 states. [2021-12-15 22:08:59,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173424 to 172201. [2021-12-15 22:08:59,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172201 states, 172200 states have (on average 1.0828745644599302) internal successors, (186471), 172200 states have internal predecessors, (186471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:59,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172201 states to 172201 states and 186471 transitions. [2021-12-15 22:08:59,735 INFO L78 Accepts]: Start accepts. Automaton has 172201 states and 186471 transitions. Word has length 430 [2021-12-15 22:08:59,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:59,735 INFO L470 AbstractCegarLoop]: Abstraction has 172201 states and 186471 transitions. [2021-12-15 22:08:59,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:59,735 INFO L276 IsEmpty]: Start isEmpty. Operand 172201 states and 186471 transitions. [2021-12-15 22:08:59,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2021-12-15 22:08:59,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:59,873 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:08:59,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 22:09:00,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-15 22:09:00,088 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:09:00,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:09:00,088 INFO L85 PathProgramCache]: Analyzing trace with hash 984119373, now seen corresponding path program 1 times [2021-12-15 22:09:00,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:09:00,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994498473] [2021-12-15 22:09:00,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:09:00,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:09:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:09:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 130 proven. 12 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2021-12-15 22:09:00,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:09:00,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994498473] [2021-12-15 22:09:00,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994498473] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:09:00,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394687208] [2021-12-15 22:09:00,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:09:00,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:09:00,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:09:00,192 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:09:00,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 22:09:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:09:00,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 22:09:00,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:09:01,866 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 356 proven. 0 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-12-15 22:09:01,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:09:01,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394687208] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:09:01,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:09:01,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 22:09:01,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455711752] [2021-12-15 22:09:01,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:09:01,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:09:01,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:09:01,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:09:01,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:09:01,868 INFO L87 Difference]: Start difference. First operand 172201 states and 186471 transitions. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 2 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)