/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:03:44,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:03:44,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:03:44,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:03:44,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:03:44,239 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:03:44,241 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:03:44,244 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:03:44,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:03:44,247 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:03:44,248 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:03:44,249 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:03:44,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:03:44,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:03:44,253 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:03:44,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:03:44,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:03:44,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:03:44,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:03:44,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:03:44,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:03:44,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:03:44,266 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:03:44,267 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:03:44,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:03:44,274 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:03:44,275 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:03:44,291 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:03:44,293 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:03:44,294 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:03:44,295 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:03:44,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:03:44,297 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:03:44,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:03:44,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:03:44,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:03:44,304 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:03:44,330 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:03:44,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:03:44,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:03:44,332 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:03:44,332 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:03:44,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:03:44,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:03:44,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:03:44,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:03:44,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:03:44,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:03:44,334 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:03:44,334 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:03:44,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:03:44,335 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:03:44,335 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:03:44,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:03:44,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:03:44,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:03:44,336 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:03:44,336 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:03:44,336 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:03:44,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:03:44,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:03:44,337 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:03:44,337 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:03:44,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:03:44,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:03:44,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:03:44,748 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:03:44,748 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:03:44,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c [2020-12-22 06:03:44,849 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0980821c0/6dbd8dd3c58945ebbf8f7fd74d01b246/FLAG574ce2302 [2020-12-22 06:03:45,620 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:03:45,621 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c [2020-12-22 06:03:45,667 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0980821c0/6dbd8dd3c58945ebbf8f7fd74d01b246/FLAG574ce2302 [2020-12-22 06:03:45,855 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0980821c0/6dbd8dd3c58945ebbf8f7fd74d01b246 [2020-12-22 06:03:45,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:03:45,861 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:03:45,865 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:03:45,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:03:45,869 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:03:45,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:03:45" (1/1) ... [2020-12-22 06:03:45,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62445750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:03:45, skipping insertion in model container [2020-12-22 06:03:45,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:03:45" (1/1) ... [2020-12-22 06:03:45,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:03:45,951 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:03:46,208 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c[17090,17103] [2020-12-22 06:03:46,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:03:46,592 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:03:46,651 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c[17090,17103] [2020-12-22 06:03:46,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:03:46,902 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:03:46,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:03:46 WrapperNode [2020-12-22 06:03:46,902 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:03:46,904 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:03:46,904 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:03:46,904 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:03:46,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:03:46" (1/1) ... [2020-12-22 06:03:46,982 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:03:46" (1/1) ... [2020-12-22 06:03:47,218 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:03:47,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:03:47,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:03:47,225 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:03:47,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:03:46" (1/1) ... [2020-12-22 06:03:47,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:03:46" (1/1) ... [2020-12-22 06:03:47,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:03:46" (1/1) ... [2020-12-22 06:03:47,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:03:46" (1/1) ... [2020-12-22 06:03:47,370 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:03:46" (1/1) ... [2020-12-22 06:03:47,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:03:46" (1/1) ... [2020-12-22 06:03:47,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:03:46" (1/1) ... [2020-12-22 06:03:47,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:03:47,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:03:47,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:03:47,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:03:47,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:03:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:03:47,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:03:47,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:03:47,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:03:47,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:03:55,329 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:03:55,329 INFO L299 CfgBuilder]: Removed 553 assume(true) statements. [2020-12-22 06:03:55,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:03:55 BoogieIcfgContainer [2020-12-22 06:03:55,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:03:55,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:03:55,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:03:55,340 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:03:55,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:03:45" (1/3) ... [2020-12-22 06:03:55,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5808011c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:03:55, skipping insertion in model container [2020-12-22 06:03:55,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:03:46" (2/3) ... [2020-12-22 06:03:55,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5808011c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:03:55, skipping insertion in model container [2020-12-22 06:03:55,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:03:55" (3/3) ... [2020-12-22 06:03:55,344 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product17.cil.c [2020-12-22 06:03:55,350 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:03:55,356 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-22 06:03:55,375 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-22 06:03:55,412 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:03:55,413 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:03:55,413 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:03:55,413 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:03:55,413 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:03:55,413 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:03:55,414 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:03:55,414 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:03:55,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2404 states. [2020-12-22 06:03:55,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 06:03:55,480 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:03:55,481 INFO L422 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] [2020-12-22 06:03:55,481 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:03:55,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:03:55,488 INFO L82 PathProgramCache]: Analyzing trace with hash 873437399, now seen corresponding path program 1 times [2020-12-22 06:03:55,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:03:55,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230352295] [2020-12-22 06:03:55,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:03:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:03:55,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:03:55,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230352295] [2020-12-22 06:03:55,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:03:55,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:03:55,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644752315] [2020-12-22 06:03:55,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:03:55,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:03:56,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:03:56,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:03:56,010 INFO L87 Difference]: Start difference. First operand 2404 states. Second operand 3 states. [2020-12-22 06:03:56,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:03:56,290 INFO L93 Difference]: Finished difference Result 4799 states and 9073 transitions. [2020-12-22 06:03:56,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:03:56,292 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-12-22 06:03:56,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:03:56,356 INFO L225 Difference]: With dead ends: 4799 [2020-12-22 06:03:56,356 INFO L226 Difference]: Without dead ends: 2400 [2020-12-22 06:03:56,373 INFO L677 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 [2020-12-22 06:03:56,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2020-12-22 06:03:56,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2400. [2020-12-22 06:03:56,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2400 states. [2020-12-22 06:03:56,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 4527 transitions. [2020-12-22 06:03:56,562 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 4527 transitions. Word has length 38 [2020-12-22 06:03:56,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:03:56,563 INFO L481 AbstractCegarLoop]: Abstraction has 2400 states and 4527 transitions. [2020-12-22 06:03:56,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:03:56,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 4527 transitions. [2020-12-22 06:03:56,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 06:03:56,569 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:03:56,569 INFO L422 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] [2020-12-22 06:03:56,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:03:56,571 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:03:56,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:03:56,572 INFO L82 PathProgramCache]: Analyzing trace with hash 516083280, now seen corresponding path program 1 times [2020-12-22 06:03:56,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:03:56,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918832240] [2020-12-22 06:03:56,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:03:56,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:03:56,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:03:56,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918832240] [2020-12-22 06:03:56,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:03:56,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:03:56,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472823388] [2020-12-22 06:03:56,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:03:56,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:03:56,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:03:56,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:03:56,794 INFO L87 Difference]: Start difference. First operand 2400 states and 4527 transitions. Second operand 6 states. [2020-12-22 06:03:57,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:03:57,051 INFO L93 Difference]: Finished difference Result 4751 states and 8970 transitions. [2020-12-22 06:03:57,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:03:57,052 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-12-22 06:03:57,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:03:57,069 INFO L225 Difference]: With dead ends: 4751 [2020-12-22 06:03:57,069 INFO L226 Difference]: Without dead ends: 2394 [2020-12-22 06:03:57,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:03:57,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2394 states. [2020-12-22 06:03:57,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2394 to 2394. [2020-12-22 06:03:57,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2394 states. [2020-12-22 06:03:57,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2394 states to 2394 states and 4514 transitions. [2020-12-22 06:03:57,257 INFO L78 Accepts]: Start accepts. Automaton has 2394 states and 4514 transitions. Word has length 45 [2020-12-22 06:03:57,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:03:57,259 INFO L481 AbstractCegarLoop]: Abstraction has 2394 states and 4514 transitions. [2020-12-22 06:03:57,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:03:57,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2394 states and 4514 transitions. [2020-12-22 06:03:57,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 06:03:57,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:03:57,266 INFO L422 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] [2020-12-22 06:03:57,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:03:57,268 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:03:57,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:03:57,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1558658418, now seen corresponding path program 1 times [2020-12-22 06:03:57,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:03:57,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845608410] [2020-12-22 06:03:57,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:03:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:03:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:03:57,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845608410] [2020-12-22 06:03:57,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:03:57,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:03:57,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718544885] [2020-12-22 06:03:57,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:03:57,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:03:57,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:03:57,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:03:57,418 INFO L87 Difference]: Start difference. First operand 2394 states and 4514 transitions. Second operand 4 states. [2020-12-22 06:03:57,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:03:57,674 INFO L93 Difference]: Finished difference Result 4745 states and 8957 transitions. [2020-12-22 06:03:57,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:03:57,675 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-12-22 06:03:57,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:03:57,689 INFO L225 Difference]: With dead ends: 4745 [2020-12-22 06:03:57,689 INFO L226 Difference]: Without dead ends: 2394 [2020-12-22 06:03:57,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:03:57,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2394 states. [2020-12-22 06:03:57,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2394 to 2394. [2020-12-22 06:03:57,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2394 states. [2020-12-22 06:03:57,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2394 states to 2394 states and 4510 transitions. [2020-12-22 06:03:57,793 INFO L78 Accepts]: Start accepts. Automaton has 2394 states and 4510 transitions. Word has length 46 [2020-12-22 06:03:57,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:03:57,800 INFO L481 AbstractCegarLoop]: Abstraction has 2394 states and 4510 transitions. [2020-12-22 06:03:57,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:03:57,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2394 states and 4510 transitions. [2020-12-22 06:03:57,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 06:03:57,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:03:57,803 INFO L422 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] [2020-12-22 06:03:57,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:03:57,804 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:03:57,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:03:57,804 INFO L82 PathProgramCache]: Analyzing trace with hash -800616179, now seen corresponding path program 1 times [2020-12-22 06:03:57,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:03:57,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74142449] [2020-12-22 06:03:57,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:03:57,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:03:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:03:57,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74142449] [2020-12-22 06:03:57,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:03:57,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:03:57,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305429258] [2020-12-22 06:03:57,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:03:57,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:03:57,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:03:57,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:03:57,900 INFO L87 Difference]: Start difference. First operand 2394 states and 4510 transitions. Second operand 4 states. [2020-12-22 06:03:58,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:03:58,140 INFO L93 Difference]: Finished difference Result 4745 states and 8953 transitions. [2020-12-22 06:03:58,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:03:58,141 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-12-22 06:03:58,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:03:58,155 INFO L225 Difference]: With dead ends: 4745 [2020-12-22 06:03:58,155 INFO L226 Difference]: Without dead ends: 2394 [2020-12-22 06:03:58,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:03:58,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2394 states. [2020-12-22 06:03:58,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2394 to 2394. [2020-12-22 06:03:58,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2394 states. [2020-12-22 06:03:58,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2394 states to 2394 states and 4506 transitions. [2020-12-22 06:03:58,336 INFO L78 Accepts]: Start accepts. Automaton has 2394 states and 4506 transitions. Word has length 47 [2020-12-22 06:03:58,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:03:58,337 INFO L481 AbstractCegarLoop]: Abstraction has 2394 states and 4506 transitions. [2020-12-22 06:03:58,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:03:58,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2394 states and 4506 transitions. [2020-12-22 06:03:58,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 06:03:58,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:03:58,339 INFO L422 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] [2020-12-22 06:03:58,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:03:58,342 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:03:58,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:03:58,343 INFO L82 PathProgramCache]: Analyzing trace with hash -867104019, now seen corresponding path program 1 times [2020-12-22 06:03:58,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:03:58,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198197993] [2020-12-22 06:03:58,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:03:58,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:03:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:03:58,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198197993] [2020-12-22 06:03:58,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:03:58,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:03:58,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086901009] [2020-12-22 06:03:58,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:03:58,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:03:58,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:03:58,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:03:58,454 INFO L87 Difference]: Start difference. First operand 2394 states and 4506 transitions. Second operand 4 states. [2020-12-22 06:03:58,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:03:58,702 INFO L93 Difference]: Finished difference Result 4745 states and 8949 transitions. [2020-12-22 06:03:58,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:03:58,705 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-12-22 06:03:58,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:03:58,720 INFO L225 Difference]: With dead ends: 4745 [2020-12-22 06:03:58,720 INFO L226 Difference]: Without dead ends: 2394 [2020-12-22 06:03:58,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:03:58,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2394 states. [2020-12-22 06:03:58,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2394 to 2394. [2020-12-22 06:03:58,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2394 states. [2020-12-22 06:03:58,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2394 states to 2394 states and 4502 transitions. [2020-12-22 06:03:58,839 INFO L78 Accepts]: Start accepts. Automaton has 2394 states and 4502 transitions. Word has length 48 [2020-12-22 06:03:58,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:03:58,841 INFO L481 AbstractCegarLoop]: Abstraction has 2394 states and 4502 transitions. [2020-12-22 06:03:58,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:03:58,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2394 states and 4502 transitions. [2020-12-22 06:03:58,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 06:03:58,845 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:03:58,845 INFO L422 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] [2020-12-22 06:03:58,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:03:58,846 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:03:58,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:03:58,847 INFO L82 PathProgramCache]: Analyzing trace with hash 703094381, now seen corresponding path program 1 times [2020-12-22 06:03:58,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:03:58,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549293233] [2020-12-22 06:03:58,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:03:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:03:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:03:58,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549293233] [2020-12-22 06:03:58,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:03:58,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:03:58,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317132963] [2020-12-22 06:03:58,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:03:58,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:03:58,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:03:58,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:03:58,966 INFO L87 Difference]: Start difference. First operand 2394 states and 4502 transitions. Second operand 4 states. [2020-12-22 06:03:59,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:03:59,114 INFO L93 Difference]: Finished difference Result 4745 states and 8945 transitions. [2020-12-22 06:03:59,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:03:59,115 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-12-22 06:03:59,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:03:59,129 INFO L225 Difference]: With dead ends: 4745 [2020-12-22 06:03:59,130 INFO L226 Difference]: Without dead ends: 2373 [2020-12-22 06:03:59,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:03:59,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2020-12-22 06:03:59,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 2373. [2020-12-22 06:03:59,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2373 states. [2020-12-22 06:03:59,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2373 states to 2373 states and 4468 transitions. [2020-12-22 06:03:59,232 INFO L78 Accepts]: Start accepts. Automaton has 2373 states and 4468 transitions. Word has length 48 [2020-12-22 06:03:59,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:03:59,232 INFO L481 AbstractCegarLoop]: Abstraction has 2373 states and 4468 transitions. [2020-12-22 06:03:59,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:03:59,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2373 states and 4468 transitions. [2020-12-22 06:03:59,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 06:03:59,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:03:59,234 INFO L422 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] [2020-12-22 06:03:59,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:03:59,235 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:03:59,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:03:59,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1423320872, now seen corresponding path program 1 times [2020-12-22 06:03:59,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:03:59,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315447348] [2020-12-22 06:03:59,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:03:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:03:59,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:03:59,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315447348] [2020-12-22 06:03:59,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:03:59,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:03:59,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711429756] [2020-12-22 06:03:59,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:03:59,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:03:59,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:03:59,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:03:59,321 INFO L87 Difference]: Start difference. First operand 2373 states and 4468 transitions. Second operand 4 states. [2020-12-22 06:03:59,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:03:59,500 INFO L93 Difference]: Finished difference Result 4724 states and 8911 transitions. [2020-12-22 06:03:59,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:03:59,501 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-12-22 06:03:59,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:03:59,514 INFO L225 Difference]: With dead ends: 4724 [2020-12-22 06:03:59,515 INFO L226 Difference]: Without dead ends: 2373 [2020-12-22 06:03:59,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:03:59,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2020-12-22 06:03:59,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 2373. [2020-12-22 06:03:59,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2373 states. [2020-12-22 06:03:59,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2373 states to 2373 states and 4467 transitions. [2020-12-22 06:03:59,624 INFO L78 Accepts]: Start accepts. Automaton has 2373 states and 4467 transitions. Word has length 49 [2020-12-22 06:03:59,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:03:59,624 INFO L481 AbstractCegarLoop]: Abstraction has 2373 states and 4467 transitions. [2020-12-22 06:03:59,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:03:59,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2373 states and 4467 transitions. [2020-12-22 06:03:59,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 06:03:59,627 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:03:59,627 INFO L422 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] [2020-12-22 06:03:59,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:03:59,628 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:03:59,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:03:59,628 INFO L82 PathProgramCache]: Analyzing trace with hash -531370904, now seen corresponding path program 1 times [2020-12-22 06:03:59,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:03:59,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639593314] [2020-12-22 06:03:59,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:03:59,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:03:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:03:59,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639593314] [2020-12-22 06:03:59,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:03:59,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:03:59,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588207414] [2020-12-22 06:03:59,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:03:59,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:03:59,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:03:59,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:03:59,709 INFO L87 Difference]: Start difference. First operand 2373 states and 4467 transitions. Second operand 4 states. [2020-12-22 06:03:59,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:03:59,864 INFO L93 Difference]: Finished difference Result 4724 states and 8910 transitions. [2020-12-22 06:03:59,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:03:59,865 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-12-22 06:03:59,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:03:59,879 INFO L225 Difference]: With dead ends: 4724 [2020-12-22 06:03:59,879 INFO L226 Difference]: Without dead ends: 2373 [2020-12-22 06:03:59,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:03:59,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2020-12-22 06:03:59,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 2373. [2020-12-22 06:03:59,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2373 states. [2020-12-22 06:03:59,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2373 states to 2373 states and 4466 transitions. [2020-12-22 06:03:59,985 INFO L78 Accepts]: Start accepts. Automaton has 2373 states and 4466 transitions. Word has length 50 [2020-12-22 06:03:59,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:03:59,987 INFO L481 AbstractCegarLoop]: Abstraction has 2373 states and 4466 transitions. [2020-12-22 06:03:59,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:03:59,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2373 states and 4466 transitions. [2020-12-22 06:03:59,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 06:03:59,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:03:59,990 INFO L422 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] [2020-12-22 06:03:59,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:03:59,990 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:03:59,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:03:59,991 INFO L82 PathProgramCache]: Analyzing trace with hash -940693181, now seen corresponding path program 1 times [2020-12-22 06:03:59,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:03:59,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509085869] [2020-12-22 06:03:59,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:00,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:04:00,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509085869] [2020-12-22 06:04:00,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:00,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:04:00,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678333092] [2020-12-22 06:04:00,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:04:00,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:00,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:04:00,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:04:00,121 INFO L87 Difference]: Start difference. First operand 2373 states and 4466 transitions. Second operand 7 states. [2020-12-22 06:04:00,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:00,374 INFO L93 Difference]: Finished difference Result 4718 states and 8898 transitions. [2020-12-22 06:04:00,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:04:00,375 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2020-12-22 06:04:00,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:00,404 INFO L225 Difference]: With dead ends: 4718 [2020-12-22 06:04:00,407 INFO L226 Difference]: Without dead ends: 2373 [2020-12-22 06:04:00,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-22 06:04:00,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2020-12-22 06:04:00,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 2373. [2020-12-22 06:04:00,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2373 states. [2020-12-22 06:04:00,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2373 states to 2373 states and 4465 transitions. [2020-12-22 06:04:00,511 INFO L78 Accepts]: Start accepts. Automaton has 2373 states and 4465 transitions. Word has length 51 [2020-12-22 06:04:00,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:00,511 INFO L481 AbstractCegarLoop]: Abstraction has 2373 states and 4465 transitions. [2020-12-22 06:04:00,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:04:00,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2373 states and 4465 transitions. [2020-12-22 06:04:00,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 06:04:00,513 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:00,514 INFO L422 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] [2020-12-22 06:04:00,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 06:04:00,514 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:04:00,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:00,514 INFO L82 PathProgramCache]: Analyzing trace with hash 2046798611, now seen corresponding path program 1 times [2020-12-22 06:04:00,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:00,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153403492] [2020-12-22 06:04:00,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:04:00,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153403492] [2020-12-22 06:04:00,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:00,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:04:00,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188169454] [2020-12-22 06:04:00,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:04:00,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:00,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:04:00,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:04:00,599 INFO L87 Difference]: Start difference. First operand 2373 states and 4465 transitions. Second operand 5 states. [2020-12-22 06:04:03,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:03,099 INFO L93 Difference]: Finished difference Result 9539 states and 17933 transitions. [2020-12-22 06:04:03,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:04:03,100 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-12-22 06:04:03,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:03,119 INFO L225 Difference]: With dead ends: 9539 [2020-12-22 06:04:03,119 INFO L226 Difference]: Without dead ends: 7209 [2020-12-22 06:04:03,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:04:03,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7209 states. [2020-12-22 06:04:03,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7209 to 2377. [2020-12-22 06:04:03,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2377 states. [2020-12-22 06:04:03,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 4469 transitions. [2020-12-22 06:04:03,271 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 4469 transitions. Word has length 52 [2020-12-22 06:04:03,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:03,271 INFO L481 AbstractCegarLoop]: Abstraction has 2377 states and 4469 transitions. [2020-12-22 06:04:03,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:04:03,271 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 4469 transitions. [2020-12-22 06:04:03,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 06:04:03,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:03,273 INFO L422 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] [2020-12-22 06:04:03,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:04:03,273 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:04:03,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:03,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1857474613, now seen corresponding path program 1 times [2020-12-22 06:04:03,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:03,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346690360] [2020-12-22 06:04:03,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:03,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:03,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:04:03,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346690360] [2020-12-22 06:04:03,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:03,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:04:03,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749173720] [2020-12-22 06:04:03,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:04:03,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:03,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:04:03,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:04:03,342 INFO L87 Difference]: Start difference. First operand 2377 states and 4469 transitions. Second operand 4 states. [2020-12-22 06:04:05,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:05,616 INFO L93 Difference]: Finished difference Result 6919 states and 12966 transitions. [2020-12-22 06:04:05,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:04:05,617 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-12-22 06:04:05,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:05,634 INFO L225 Difference]: With dead ends: 6919 [2020-12-22 06:04:05,634 INFO L226 Difference]: Without dead ends: 4572 [2020-12-22 06:04:05,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:04:05,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4572 states. [2020-12-22 06:04:05,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4572 to 3266. [2020-12-22 06:04:05,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3266 states. [2020-12-22 06:04:05,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 6082 transitions. [2020-12-22 06:04:05,803 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 6082 transitions. Word has length 53 [2020-12-22 06:04:05,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:05,803 INFO L481 AbstractCegarLoop]: Abstraction has 3266 states and 6082 transitions. [2020-12-22 06:04:05,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:04:05,804 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 6082 transitions. [2020-12-22 06:04:05,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 06:04:05,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:05,805 INFO L422 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] [2020-12-22 06:04:05,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 06:04:05,810 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:04:05,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:05,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1635000845, now seen corresponding path program 1 times [2020-12-22 06:04:05,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:05,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161130141] [2020-12-22 06:04:05,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:04:05,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161130141] [2020-12-22 06:04:05,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:05,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:04:05,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997705857] [2020-12-22 06:04:05,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:04:05,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:05,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:04:05,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:04:05,906 INFO L87 Difference]: Start difference. First operand 3266 states and 6082 transitions. Second operand 5 states. [2020-12-22 06:04:07,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:07,136 INFO L93 Difference]: Finished difference Result 23628 states and 44209 transitions. [2020-12-22 06:04:07,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:04:07,136 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 06:04:07,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:07,196 INFO L225 Difference]: With dead ends: 23628 [2020-12-22 06:04:07,196 INFO L226 Difference]: Without dead ends: 20401 [2020-12-22 06:04:07,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:04:07,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20401 states. [2020-12-22 06:04:07,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20401 to 6030. [2020-12-22 06:04:07,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6030 states. [2020-12-22 06:04:07,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6030 states to 6030 states and 11272 transitions. [2020-12-22 06:04:07,667 INFO L78 Accepts]: Start accepts. Automaton has 6030 states and 11272 transitions. Word has length 55 [2020-12-22 06:04:07,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:07,667 INFO L481 AbstractCegarLoop]: Abstraction has 6030 states and 11272 transitions. [2020-12-22 06:04:07,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:04:07,668 INFO L276 IsEmpty]: Start isEmpty. Operand 6030 states and 11272 transitions. [2020-12-22 06:04:07,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 06:04:07,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:07,669 INFO L422 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] [2020-12-22 06:04:07,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:04:07,670 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:04:07,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:07,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1769014351, now seen corresponding path program 1 times [2020-12-22 06:04:07,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:07,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921453864] [2020-12-22 06:04:07,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:04:07,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921453864] [2020-12-22 06:04:07,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:07,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:04:07,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026139760] [2020-12-22 06:04:07,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:04:07,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:07,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:04:07,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:04:07,741 INFO L87 Difference]: Start difference. First operand 6030 states and 11272 transitions. Second operand 4 states. [2020-12-22 06:04:08,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:08,336 INFO L93 Difference]: Finished difference Result 14729 states and 27504 transitions. [2020-12-22 06:04:08,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:04:08,337 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-12-22 06:04:08,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:08,370 INFO L225 Difference]: With dead ends: 14729 [2020-12-22 06:04:08,370 INFO L226 Difference]: Without dead ends: 12161 [2020-12-22 06:04:08,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:04:08,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12161 states. [2020-12-22 06:04:08,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12161 to 8347. [2020-12-22 06:04:08,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8347 states. [2020-12-22 06:04:08,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8347 states to 8347 states and 15595 transitions. [2020-12-22 06:04:08,840 INFO L78 Accepts]: Start accepts. Automaton has 8347 states and 15595 transitions. Word has length 55 [2020-12-22 06:04:08,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:08,841 INFO L481 AbstractCegarLoop]: Abstraction has 8347 states and 15595 transitions. [2020-12-22 06:04:08,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:04:08,842 INFO L276 IsEmpty]: Start isEmpty. Operand 8347 states and 15595 transitions. [2020-12-22 06:04:08,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 06:04:08,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:08,844 INFO L422 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] [2020-12-22 06:04:08,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 06:04:08,845 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:04:08,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:08,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1226760773, now seen corresponding path program 1 times [2020-12-22 06:04:08,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:08,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554130441] [2020-12-22 06:04:08,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:08,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:04:08,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554130441] [2020-12-22 06:04:08,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:08,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:04:08,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981109837] [2020-12-22 06:04:08,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:04:08,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:08,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:04:08,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:04:08,918 INFO L87 Difference]: Start difference. First operand 8347 states and 15595 transitions. Second operand 4 states. [2020-12-22 06:04:09,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:09,632 INFO L93 Difference]: Finished difference Result 17301 states and 32211 transitions. [2020-12-22 06:04:09,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:04:09,632 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-12-22 06:04:09,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:09,657 INFO L225 Difference]: With dead ends: 17301 [2020-12-22 06:04:09,657 INFO L226 Difference]: Without dead ends: 12605 [2020-12-22 06:04:09,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:04:09,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12605 states. [2020-12-22 06:04:10,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12605 to 8357. [2020-12-22 06:04:10,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8357 states. [2020-12-22 06:04:10,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8357 states to 8357 states and 15601 transitions. [2020-12-22 06:04:10,045 INFO L78 Accepts]: Start accepts. Automaton has 8357 states and 15601 transitions. Word has length 57 [2020-12-22 06:04:10,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:10,046 INFO L481 AbstractCegarLoop]: Abstraction has 8357 states and 15601 transitions. [2020-12-22 06:04:10,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:04:10,046 INFO L276 IsEmpty]: Start isEmpty. Operand 8357 states and 15601 transitions. [2020-12-22 06:04:10,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 06:04:10,051 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:10,051 INFO L422 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] [2020-12-22 06:04:10,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:04:10,051 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:04:10,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:10,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1096940004, now seen corresponding path program 1 times [2020-12-22 06:04:10,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:10,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981190500] [2020-12-22 06:04:10,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:04:10,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981190500] [2020-12-22 06:04:10,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:10,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:04:10,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804311032] [2020-12-22 06:04:10,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:04:10,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:10,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:04:10,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:04:10,166 INFO L87 Difference]: Start difference. First operand 8357 states and 15601 transitions. Second operand 7 states. [2020-12-22 06:04:11,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:11,677 INFO L93 Difference]: Finished difference Result 21923 states and 40880 transitions. [2020-12-22 06:04:11,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 06:04:11,678 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 63 [2020-12-22 06:04:11,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:11,707 INFO L225 Difference]: With dead ends: 21923 [2020-12-22 06:04:11,707 INFO L226 Difference]: Without dead ends: 17048 [2020-12-22 06:04:11,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-22 06:04:11,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17048 states. [2020-12-22 06:04:12,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17048 to 8361. [2020-12-22 06:04:12,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8361 states. [2020-12-22 06:04:12,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8361 states to 8361 states and 15599 transitions. [2020-12-22 06:04:12,196 INFO L78 Accepts]: Start accepts. Automaton has 8361 states and 15599 transitions. Word has length 63 [2020-12-22 06:04:12,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:12,197 INFO L481 AbstractCegarLoop]: Abstraction has 8361 states and 15599 transitions. [2020-12-22 06:04:12,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:04:12,197 INFO L276 IsEmpty]: Start isEmpty. Operand 8361 states and 15599 transitions. [2020-12-22 06:04:12,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 06:04:12,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:12,200 INFO L422 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] [2020-12-22 06:04:12,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 06:04:12,201 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:04:12,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:12,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1315794722, now seen corresponding path program 1 times [2020-12-22 06:04:12,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:12,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85593587] [2020-12-22 06:04:12,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:04:12,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85593587] [2020-12-22 06:04:12,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:12,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:04:12,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441054780] [2020-12-22 06:04:12,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:04:12,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:12,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:04:12,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:04:12,287 INFO L87 Difference]: Start difference. First operand 8361 states and 15599 transitions. Second operand 5 states. [2020-12-22 06:04:12,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:12,887 INFO L93 Difference]: Finished difference Result 13056 states and 24350 transitions. [2020-12-22 06:04:12,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:04:12,887 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 06:04:12,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:12,900 INFO L225 Difference]: With dead ends: 13056 [2020-12-22 06:04:12,901 INFO L226 Difference]: Without dead ends: 8380 [2020-12-22 06:04:12,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:04:12,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8380 states. [2020-12-22 06:04:13,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8380 to 8361. [2020-12-22 06:04:13,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8361 states. [2020-12-22 06:04:13,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8361 states to 8361 states and 15584 transitions. [2020-12-22 06:04:13,286 INFO L78 Accepts]: Start accepts. Automaton has 8361 states and 15584 transitions. Word has length 63 [2020-12-22 06:04:13,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:13,287 INFO L481 AbstractCegarLoop]: Abstraction has 8361 states and 15584 transitions. [2020-12-22 06:04:13,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:04:13,287 INFO L276 IsEmpty]: Start isEmpty. Operand 8361 states and 15584 transitions. [2020-12-22 06:04:13,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 06:04:13,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:13,290 INFO L422 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] [2020-12-22 06:04:13,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 06:04:13,290 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:04:13,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:13,291 INFO L82 PathProgramCache]: Analyzing trace with hash 728988708, now seen corresponding path program 1 times [2020-12-22 06:04:13,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:13,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49546230] [2020-12-22 06:04:13,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:13,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:04:13,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49546230] [2020-12-22 06:04:13,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:13,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:04:13,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755975868] [2020-12-22 06:04:13,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:04:13,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:13,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:04:13,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:04:13,355 INFO L87 Difference]: Start difference. First operand 8361 states and 15584 transitions. Second operand 3 states. [2020-12-22 06:04:13,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:13,994 INFO L93 Difference]: Finished difference Result 22980 states and 42912 transitions. [2020-12-22 06:04:13,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:04:13,995 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 06:04:13,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:14,017 INFO L225 Difference]: With dead ends: 22980 [2020-12-22 06:04:14,017 INFO L226 Difference]: Without dead ends: 16233 [2020-12-22 06:04:14,030 INFO L677 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 [2020-12-22 06:04:14,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16233 states. [2020-12-22 06:04:14,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16233 to 16233. [2020-12-22 06:04:14,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16233 states. [2020-12-22 06:04:14,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16233 states to 16233 states and 30329 transitions. [2020-12-22 06:04:14,658 INFO L78 Accepts]: Start accepts. Automaton has 16233 states and 30329 transitions. Word has length 63 [2020-12-22 06:04:14,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:14,658 INFO L481 AbstractCegarLoop]: Abstraction has 16233 states and 30329 transitions. [2020-12-22 06:04:14,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:04:14,658 INFO L276 IsEmpty]: Start isEmpty. Operand 16233 states and 30329 transitions. [2020-12-22 06:04:14,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 06:04:14,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:14,660 INFO L422 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] [2020-12-22 06:04:14,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 06:04:14,660 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:04:14,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:14,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1590923608, now seen corresponding path program 1 times [2020-12-22 06:04:14,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:14,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061330230] [2020-12-22 06:04:14,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:14,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:04:14,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061330230] [2020-12-22 06:04:14,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:14,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:04:14,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627370901] [2020-12-22 06:04:14,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:04:14,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:14,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:04:14,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:04:14,732 INFO L87 Difference]: Start difference. First operand 16233 states and 30329 transitions. Second operand 3 states. [2020-12-22 06:04:15,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:15,789 INFO L93 Difference]: Finished difference Result 45153 states and 84394 transitions. [2020-12-22 06:04:15,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:04:15,789 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 06:04:15,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:15,829 INFO L225 Difference]: With dead ends: 45153 [2020-12-22 06:04:15,829 INFO L226 Difference]: Without dead ends: 31747 [2020-12-22 06:04:15,845 INFO L677 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 [2020-12-22 06:04:15,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31747 states. [2020-12-22 06:04:16,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31747 to 31745. [2020-12-22 06:04:16,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31745 states. [2020-12-22 06:04:16,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31745 states to 31745 states and 59373 transitions. [2020-12-22 06:04:16,969 INFO L78 Accepts]: Start accepts. Automaton has 31745 states and 59373 transitions. Word has length 65 [2020-12-22 06:04:16,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:16,969 INFO L481 AbstractCegarLoop]: Abstraction has 31745 states and 59373 transitions. [2020-12-22 06:04:16,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:04:16,969 INFO L276 IsEmpty]: Start isEmpty. Operand 31745 states and 59373 transitions. [2020-12-22 06:04:16,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 06:04:16,972 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:16,972 INFO L422 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] [2020-12-22 06:04:16,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 06:04:16,973 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:04:16,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:16,973 INFO L82 PathProgramCache]: Analyzing trace with hash 889406559, now seen corresponding path program 1 times [2020-12-22 06:04:16,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:16,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382443456] [2020-12-22 06:04:16,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:16,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:17,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:04:17,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382443456] [2020-12-22 06:04:17,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:17,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:04:17,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870498338] [2020-12-22 06:04:17,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:04:17,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:17,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:04:17,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:04:17,035 INFO L87 Difference]: Start difference. First operand 31745 states and 59373 transitions. Second operand 3 states. [2020-12-22 06:04:19,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:19,125 INFO L93 Difference]: Finished difference Result 89004 states and 166409 transitions. [2020-12-22 06:04:19,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:04:19,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 06:04:19,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:19,217 INFO L225 Difference]: With dead ends: 89004 [2020-12-22 06:04:19,218 INFO L226 Difference]: Without dead ends: 62299 [2020-12-22 06:04:19,243 INFO L677 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 [2020-12-22 06:04:19,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62299 states. [2020-12-22 06:04:21,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62299 to 62295. [2020-12-22 06:04:21,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62295 states. [2020-12-22 06:04:21,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62295 states to 62295 states and 116549 transitions. [2020-12-22 06:04:21,671 INFO L78 Accepts]: Start accepts. Automaton has 62295 states and 116549 transitions. Word has length 66 [2020-12-22 06:04:21,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:21,672 INFO L481 AbstractCegarLoop]: Abstraction has 62295 states and 116549 transitions. [2020-12-22 06:04:21,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:04:21,672 INFO L276 IsEmpty]: Start isEmpty. Operand 62295 states and 116549 transitions. [2020-12-22 06:04:21,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 06:04:21,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:21,675 INFO L422 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] [2020-12-22 06:04:21,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 06:04:21,675 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:04:21,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:21,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1801817087, now seen corresponding path program 1 times [2020-12-22 06:04:21,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:21,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334996886] [2020-12-22 06:04:21,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:21,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:04:21,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334996886] [2020-12-22 06:04:21,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:21,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:04:21,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000979411] [2020-12-22 06:04:21,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:04:21,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:21,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:04:21,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:04:21,751 INFO L87 Difference]: Start difference. First operand 62295 states and 116549 transitions. Second operand 3 states. [2020-12-22 06:04:25,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:25,663 INFO L93 Difference]: Finished difference Result 175699 states and 328506 transitions. [2020-12-22 06:04:25,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:04:25,664 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 06:04:25,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:25,883 INFO L225 Difference]: With dead ends: 175699 [2020-12-22 06:04:25,883 INFO L226 Difference]: Without dead ends: 122443 [2020-12-22 06:04:26,124 INFO L677 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 [2020-12-22 06:04:26,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122443 states. [2020-12-22 06:04:30,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122443 to 122437. [2020-12-22 06:04:30,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122437 states. [2020-12-22 06:04:30,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122437 states to 122437 states and 229057 transitions. [2020-12-22 06:04:30,837 INFO L78 Accepts]: Start accepts. Automaton has 122437 states and 229057 transitions. Word has length 67 [2020-12-22 06:04:30,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:30,837 INFO L481 AbstractCegarLoop]: Abstraction has 122437 states and 229057 transitions. [2020-12-22 06:04:30,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:04:30,837 INFO L276 IsEmpty]: Start isEmpty. Operand 122437 states and 229057 transitions. [2020-12-22 06:04:30,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 06:04:30,841 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:30,841 INFO L422 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] [2020-12-22 06:04:30,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 06:04:30,842 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:04:30,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:30,842 INFO L82 PathProgramCache]: Analyzing trace with hash 21772392, now seen corresponding path program 1 times [2020-12-22 06:04:30,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:30,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834440806] [2020-12-22 06:04:30,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:30,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:04:30,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834440806] [2020-12-22 06:04:30,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:30,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:04:30,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754588493] [2020-12-22 06:04:30,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:04:30,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:30,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:04:30,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:04:30,904 INFO L87 Difference]: Start difference. First operand 122437 states and 229057 transitions. Second operand 3 states. [2020-12-22 06:04:38,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:38,854 INFO L93 Difference]: Finished difference Result 347058 states and 648798 transitions. [2020-12-22 06:04:38,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:04:38,855 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 06:04:38,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:39,333 INFO L225 Difference]: With dead ends: 347058 [2020-12-22 06:04:39,334 INFO L226 Difference]: Without dead ends: 240798 [2020-12-22 06:04:39,423 INFO L677 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 [2020-12-22 06:04:39,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240798 states. [2020-12-22 06:04:48,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240798 to 240790. [2020-12-22 06:04:48,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240790 states. [2020-12-22 06:04:48,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240790 states to 240790 states and 450338 transitions. [2020-12-22 06:04:48,806 INFO L78 Accepts]: Start accepts. Automaton has 240790 states and 450338 transitions. Word has length 68 [2020-12-22 06:04:48,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:48,806 INFO L481 AbstractCegarLoop]: Abstraction has 240790 states and 450338 transitions. [2020-12-22 06:04:48,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:04:48,807 INFO L276 IsEmpty]: Start isEmpty. Operand 240790 states and 450338 transitions. [2020-12-22 06:04:48,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 06:04:48,846 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:48,847 INFO L422 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] [2020-12-22 06:04:48,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 06:04:48,847 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:04:48,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:48,848 INFO L82 PathProgramCache]: Analyzing trace with hash 244080318, now seen corresponding path program 1 times [2020-12-22 06:04:48,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:48,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596012163] [2020-12-22 06:04:48,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:04:49,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596012163] [2020-12-22 06:04:49,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:49,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:04:49,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407889537] [2020-12-22 06:04:49,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:04:49,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:49,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:04:49,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:04:49,376 INFO L87 Difference]: Start difference. First operand 240790 states and 450338 transitions. Second operand 4 states. [2020-12-22 06:05:00,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:00,744 INFO L93 Difference]: Finished difference Result 534665 states and 992712 transitions. [2020-12-22 06:05:00,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:05:00,749 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2020-12-22 06:05:00,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:01,590 INFO L225 Difference]: With dead ends: 534665 [2020-12-22 06:05:01,591 INFO L226 Difference]: Without dead ends: 294079 [2020-12-22 06:05:01,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:05:01,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294079 states. [2020-12-22 06:05:11,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294079 to 241176. [2020-12-22 06:05:11,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241176 states. [2020-12-22 06:05:11,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241176 states to 241176 states and 450724 transitions. [2020-12-22 06:05:11,797 INFO L78 Accepts]: Start accepts. Automaton has 241176 states and 450724 transitions. Word has length 101 [2020-12-22 06:05:11,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:11,797 INFO L481 AbstractCegarLoop]: Abstraction has 241176 states and 450724 transitions. [2020-12-22 06:05:11,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:05:11,797 INFO L276 IsEmpty]: Start isEmpty. Operand 241176 states and 450724 transitions. [2020-12-22 06:05:11,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-22 06:05:11,820 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:11,820 INFO L422 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] [2020-12-22 06:05:11,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 06:05:11,820 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:05:11,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:11,821 INFO L82 PathProgramCache]: Analyzing trace with hash 887011928, now seen corresponding path program 1 times [2020-12-22 06:05:11,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:11,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262718315] [2020-12-22 06:05:11,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:05:11,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262718315] [2020-12-22 06:05:11,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:11,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:05:11,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160963870] [2020-12-22 06:05:11,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:05:11,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:11,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:05:11,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:05:11,926 INFO L87 Difference]: Start difference. First operand 241176 states and 450724 transitions. Second operand 4 states. [2020-12-22 06:05:23,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:23,615 INFO L93 Difference]: Finished difference Result 537923 states and 1003837 transitions. [2020-12-22 06:05:23,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:05:23,615 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 102 [2020-12-22 06:05:23,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:24,222 INFO L225 Difference]: With dead ends: 537923 [2020-12-22 06:05:24,222 INFO L226 Difference]: Without dead ends: 296780 [2020-12-22 06:05:24,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:05:24,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296780 states. [2020-12-22 06:05:33,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296780 to 148297. [2020-12-22 06:05:33,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148297 states. [2020-12-22 06:05:34,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148297 states to 148297 states and 276755 transitions. [2020-12-22 06:05:34,561 INFO L78 Accepts]: Start accepts. Automaton has 148297 states and 276755 transitions. Word has length 102 [2020-12-22 06:05:34,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:34,561 INFO L481 AbstractCegarLoop]: Abstraction has 148297 states and 276755 transitions. [2020-12-22 06:05:34,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:05:34,562 INFO L276 IsEmpty]: Start isEmpty. Operand 148297 states and 276755 transitions. [2020-12-22 06:05:34,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-22 06:05:34,610 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:34,610 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:05:34,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 06:05:34,611 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:05:34,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:34,611 INFO L82 PathProgramCache]: Analyzing trace with hash 130648390, now seen corresponding path program 1 times [2020-12-22 06:05:34,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:34,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424869656] [2020-12-22 06:05:34,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:05:34,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424869656] [2020-12-22 06:05:34,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:34,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:05:34,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927753515] [2020-12-22 06:05:34,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:05:34,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:34,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:05:34,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:05:34,752 INFO L87 Difference]: Start difference. First operand 148297 states and 276755 transitions. Second operand 5 states. [2020-12-22 06:05:46,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:46,707 INFO L93 Difference]: Finished difference Result 429911 states and 802150 transitions. [2020-12-22 06:05:46,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:05:46,708 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 144 [2020-12-22 06:05:46,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:47,274 INFO L225 Difference]: With dead ends: 429911 [2020-12-22 06:05:47,274 INFO L226 Difference]: Without dead ends: 281812 [2020-12-22 06:05:47,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:05:47,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281812 states. [2020-12-22 06:05:54,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281812 to 148297. [2020-12-22 06:05:54,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148297 states. [2020-12-22 06:05:55,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148297 states to 148297 states and 276627 transitions. [2020-12-22 06:05:55,068 INFO L78 Accepts]: Start accepts. Automaton has 148297 states and 276627 transitions. Word has length 144 [2020-12-22 06:05:55,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:55,068 INFO L481 AbstractCegarLoop]: Abstraction has 148297 states and 276627 transitions. [2020-12-22 06:05:55,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:05:55,068 INFO L276 IsEmpty]: Start isEmpty. Operand 148297 states and 276627 transitions. [2020-12-22 06:05:55,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 06:05:55,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:55,104 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:05:55,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 06:05:55,105 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:05:55,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:55,105 INFO L82 PathProgramCache]: Analyzing trace with hash 849138990, now seen corresponding path program 1 times [2020-12-22 06:05:55,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:55,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619905209] [2020-12-22 06:05:55,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:55,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:05:55,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619905209] [2020-12-22 06:05:55,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:55,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:05:55,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646441144] [2020-12-22 06:05:55,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:05:55,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:55,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:05:55,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:05:55,513 INFO L87 Difference]: Start difference. First operand 148297 states and 276627 transitions. Second operand 5 states. [2020-12-22 06:06:06,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:06,925 INFO L93 Difference]: Finished difference Result 425218 states and 794655 transitions. [2020-12-22 06:06:06,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:06:06,926 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2020-12-22 06:06:06,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:07,449 INFO L225 Difference]: With dead ends: 425218 [2020-12-22 06:06:07,449 INFO L226 Difference]: Without dead ends: 276972 [2020-12-22 06:06:07,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:06:08,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276972 states. [2020-12-22 06:06:15,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276972 to 148297. [2020-12-22 06:06:15,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148297 states. [2020-12-22 06:06:15,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148297 states to 148297 states and 274315 transitions. [2020-12-22 06:06:15,622 INFO L78 Accepts]: Start accepts. Automaton has 148297 states and 274315 transitions. Word has length 148 [2020-12-22 06:06:15,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:15,622 INFO L481 AbstractCegarLoop]: Abstraction has 148297 states and 274315 transitions. [2020-12-22 06:06:15,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:06:15,622 INFO L276 IsEmpty]: Start isEmpty. Operand 148297 states and 274315 transitions. [2020-12-22 06:06:15,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 06:06:15,678 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:15,678 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:06:15,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 06:06:15,679 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:06:15,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:15,679 INFO L82 PathProgramCache]: Analyzing trace with hash 380694227, now seen corresponding path program 1 times [2020-12-22 06:06:15,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:15,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219371843] [2020-12-22 06:06:15,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:06:15,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219371843] [2020-12-22 06:06:15,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:15,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:06:15,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184304929] [2020-12-22 06:06:15,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:06:15,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:15,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:06:15,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:06:15,802 INFO L87 Difference]: Start difference. First operand 148297 states and 274315 transitions. Second operand 6 states. [2020-12-22 06:06:38,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:38,633 INFO L93 Difference]: Finished difference Result 569492 states and 1058046 transitions. [2020-12-22 06:06:38,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 06:06:38,634 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 149 [2020-12-22 06:06:38,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:39,729 INFO L225 Difference]: With dead ends: 569492 [2020-12-22 06:06:39,729 INFO L226 Difference]: Without dead ends: 421258 [2020-12-22 06:06:39,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-12-22 06:06:40,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421258 states. [2020-12-22 06:06:52,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421258 to 261331. [2020-12-22 06:06:52,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261331 states. [2020-12-22 06:06:53,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261331 states to 261331 states and 485961 transitions. [2020-12-22 06:06:53,454 INFO L78 Accepts]: Start accepts. Automaton has 261331 states and 485961 transitions. Word has length 149 [2020-12-22 06:06:53,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:53,455 INFO L481 AbstractCegarLoop]: Abstraction has 261331 states and 485961 transitions. [2020-12-22 06:06:53,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:06:53,455 INFO L276 IsEmpty]: Start isEmpty. Operand 261331 states and 485961 transitions. [2020-12-22 06:06:53,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-22 06:06:53,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:53,515 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:06:53,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 06:06:53,515 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:06:53,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:53,516 INFO L82 PathProgramCache]: Analyzing trace with hash -53600772, now seen corresponding path program 1 times [2020-12-22 06:06:53,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:53,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460682126] [2020-12-22 06:06:53,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:06:53,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460682126] [2020-12-22 06:06:53,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:53,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 06:06:53,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841197648] [2020-12-22 06:06:53,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 06:06:53,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:53,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 06:06:53,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:06:53,669 INFO L87 Difference]: Start difference. First operand 261331 states and 485961 transitions. Second operand 8 states.