/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_product01.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:02:42,232 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:02:42,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:02:42,286 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:02:42,287 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:02:42,291 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:02:42,294 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:02:42,303 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:02:42,307 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:02:42,316 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:02:42,317 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:02:42,319 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:02:42,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:02:42,323 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:02:42,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:02:42,325 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:02:42,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:02:42,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:02:42,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:02:42,332 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:02:42,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:02:42,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:02:42,337 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:02:42,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:02:42,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:02:42,376 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:02:42,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:02:42,379 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:02:42,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:02:42,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:02:42,382 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:02:42,382 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:02:42,383 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:02:42,383 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:02:42,384 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:02:42,385 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:02:42,391 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:02:42,453 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:02:42,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:02:42,457 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:02:42,457 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:02:42,458 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:02:42,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:02:42,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:02:42,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:02:42,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:02:42,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:02:42,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:02:42,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:02:42,461 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:02:42,461 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:02:42,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:02:42,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:02:42,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:02:42,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:02:42,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:02:42,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:02:42,463 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:02:42,463 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:02:42,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:02:42,464 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:02:42,464 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:02:42,464 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:02:42,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:02:42,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:02:42,930 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:02:42,931 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:02:42,932 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:02:42,933 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c [2020-12-22 06:02:43,018 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29206e33a/07777cb8f5354defbdfada358c7b49d0/FLAG3b3f23faf [2020-12-22 06:02:43,982 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:02:43,982 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c [2020-12-22 06:02:44,015 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29206e33a/07777cb8f5354defbdfada358c7b49d0/FLAG3b3f23faf [2020-12-22 06:02:44,072 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29206e33a/07777cb8f5354defbdfada358c7b49d0 [2020-12-22 06:02:44,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:02:44,077 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:02:44,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:02:44,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:02:44,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:02:44,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:02:44" (1/1) ... [2020-12-22 06:02:44,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@433496c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:02:44, skipping insertion in model container [2020-12-22 06:02:44,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:02:44" (1/1) ... [2020-12-22 06:02:44,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:02:44,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:02:44,327 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_product01.cil.c[1221,1234] [2020-12-22 06:02:44,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:02:44,873 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:02:44,892 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_product01.cil.c[1221,1234] [2020-12-22 06:02:45,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:02:45,150 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:02:45,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:02:45 WrapperNode [2020-12-22 06:02:45,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:02:45,152 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:02:45,152 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:02:45,152 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:02:45,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:02:45" (1/1) ... [2020-12-22 06:02:45,193 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:02:45" (1/1) ... [2020-12-22 06:02:45,401 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:02:45,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:02:45,404 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:02:45,404 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:02:45,414 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:02:45" (1/1) ... [2020-12-22 06:02:45,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:02:45" (1/1) ... [2020-12-22 06:02:45,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:02:45" (1/1) ... [2020-12-22 06:02:45,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:02:45" (1/1) ... [2020-12-22 06:02:45,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:02:45" (1/1) ... [2020-12-22 06:02:45,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:02:45" (1/1) ... [2020-12-22 06:02:45,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:02:45" (1/1) ... [2020-12-22 06:02:45,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:02:45,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:02:45,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:02:45,632 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:02:45,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:02:45" (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 06:02:45,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:02:45,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:02:45,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:02:45,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:02:51,182 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:02:51,182 INFO L299 CfgBuilder]: Removed 457 assume(true) statements. [2020-12-22 06:02:51,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:02:51 BoogieIcfgContainer [2020-12-22 06:02:51,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:02:51,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:02:51,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:02:51,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:02:51,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:02:44" (1/3) ... [2020-12-22 06:02:51,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@103991f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:02:51, skipping insertion in model container [2020-12-22 06:02:51,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:02:45" (2/3) ... [2020-12-22 06:02:51,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@103991f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:02:51, skipping insertion in model container [2020-12-22 06:02:51,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:02:51" (3/3) ... [2020-12-22 06:02:51,198 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product01.cil.c [2020-12-22 06:02:51,207 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:02:51,214 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-22 06:02:51,236 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-22 06:02:51,276 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:02:51,277 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:02:51,277 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:02:51,277 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:02:51,277 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:02:51,277 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:02:51,277 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:02:51,278 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:02:51,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states. [2020-12-22 06:02:51,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 06:02:51,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:02:51,384 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 06:02:51,385 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 06:02:51,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:02:51,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1136837276, now seen corresponding path program 1 times [2020-12-22 06:02:51,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:02:51,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304248565] [2020-12-22 06:02:51,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:02:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:02:51,862 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 06:02:51,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304248565] [2020-12-22 06:02:51,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:02:51,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:02:51,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716577685] [2020-12-22 06:02:51,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:02:51,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:02:51,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:02:51,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:02:51,894 INFO L87 Difference]: Start difference. First operand 2212 states. Second operand 3 states. [2020-12-22 06:02:52,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:02:52,090 INFO L93 Difference]: Finished difference Result 4415 states and 8401 transitions. [2020-12-22 06:02:52,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:02:52,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-12-22 06:02:52,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:02:52,141 INFO L225 Difference]: With dead ends: 4415 [2020-12-22 06:02:52,141 INFO L226 Difference]: Without dead ends: 2208 [2020-12-22 06:02:52,156 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 06:02:52,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2020-12-22 06:02:52,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2208. [2020-12-22 06:02:52,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2208 states. [2020-12-22 06:02:52,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 4191 transitions. [2020-12-22 06:02:52,340 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 4191 transitions. Word has length 38 [2020-12-22 06:02:52,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:02:52,341 INFO L481 AbstractCegarLoop]: Abstraction has 2208 states and 4191 transitions. [2020-12-22 06:02:52,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:02:52,341 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 4191 transitions. [2020-12-22 06:02:52,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 06:02:52,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:02:52,345 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 06:02:52,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:02:52,345 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 06:02:52,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:02:52,346 INFO L82 PathProgramCache]: Analyzing trace with hash 767142480, now seen corresponding path program 1 times [2020-12-22 06:02:52,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:02:52,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497259771] [2020-12-22 06:02:52,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:02:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:02:52,527 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 06:02:52,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497259771] [2020-12-22 06:02:52,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:02:52,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:02:52,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428402190] [2020-12-22 06:02:52,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:02:52,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:02:52,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:02:52,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:02:52,534 INFO L87 Difference]: Start difference. First operand 2208 states and 4191 transitions. Second operand 6 states. [2020-12-22 06:02:52,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:02:52,768 INFO L93 Difference]: Finished difference Result 4367 states and 8298 transitions. [2020-12-22 06:02:52,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:02:52,768 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-12-22 06:02:52,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:02:52,783 INFO L225 Difference]: With dead ends: 4367 [2020-12-22 06:02:52,783 INFO L226 Difference]: Without dead ends: 2202 [2020-12-22 06:02:52,789 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 06:02:52,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2020-12-22 06:02:52,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 2202. [2020-12-22 06:02:52,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2202 states. [2020-12-22 06:02:52,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 4178 transitions. [2020-12-22 06:02:52,881 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 4178 transitions. Word has length 45 [2020-12-22 06:02:52,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:02:52,882 INFO L481 AbstractCegarLoop]: Abstraction has 2202 states and 4178 transitions. [2020-12-22 06:02:52,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:02:52,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 4178 transitions. [2020-12-22 06:02:52,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 06:02:52,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:02:52,888 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 06:02:52,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:02:52,891 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 06:02:52,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:02:52,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1809717618, now seen corresponding path program 1 times [2020-12-22 06:02:52,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:02:52,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554124165] [2020-12-22 06:02:52,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:02:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:02:53,071 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 06:02:53,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554124165] [2020-12-22 06:02:53,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:02:53,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:02:53,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986476952] [2020-12-22 06:02:53,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:02:53,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:02:53,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:02:53,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:02:53,086 INFO L87 Difference]: Start difference. First operand 2202 states and 4178 transitions. Second operand 4 states. [2020-12-22 06:02:53,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:02:53,398 INFO L93 Difference]: Finished difference Result 4361 states and 8285 transitions. [2020-12-22 06:02:53,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:02:53,399 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-12-22 06:02:53,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:02:53,413 INFO L225 Difference]: With dead ends: 4361 [2020-12-22 06:02:53,413 INFO L226 Difference]: Without dead ends: 2202 [2020-12-22 06:02:53,419 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 06:02:53,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2020-12-22 06:02:53,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 2202. [2020-12-22 06:02:53,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2202 states. [2020-12-22 06:02:53,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 4174 transitions. [2020-12-22 06:02:53,519 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 4174 transitions. Word has length 46 [2020-12-22 06:02:53,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:02:53,526 INFO L481 AbstractCegarLoop]: Abstraction has 2202 states and 4174 transitions. [2020-12-22 06:02:53,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:02:53,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 4174 transitions. [2020-12-22 06:02:53,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 06:02:53,529 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:02:53,529 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 06:02:53,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:02:53,530 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 06:02:53,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:02:53,531 INFO L82 PathProgramCache]: Analyzing trace with hash -549556979, now seen corresponding path program 1 times [2020-12-22 06:02:53,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:02:53,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455903298] [2020-12-22 06:02:53,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:02:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:02:53,653 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 06:02:53,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455903298] [2020-12-22 06:02:53,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:02:53,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:02:53,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450218733] [2020-12-22 06:02:53,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:02:53,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:02:53,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:02:53,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:02:53,658 INFO L87 Difference]: Start difference. First operand 2202 states and 4174 transitions. Second operand 4 states. [2020-12-22 06:02:53,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:02:53,844 INFO L93 Difference]: Finished difference Result 4361 states and 8281 transitions. [2020-12-22 06:02:53,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:02:53,845 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-12-22 06:02:53,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:02:53,858 INFO L225 Difference]: With dead ends: 4361 [2020-12-22 06:02:53,858 INFO L226 Difference]: Without dead ends: 2202 [2020-12-22 06:02:53,863 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 06:02:53,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2020-12-22 06:02:53,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 2202. [2020-12-22 06:02:53,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2202 states. [2020-12-22 06:02:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 4170 transitions. [2020-12-22 06:02:53,944 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 4170 transitions. Word has length 47 [2020-12-22 06:02:53,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:02:53,944 INFO L481 AbstractCegarLoop]: Abstraction has 2202 states and 4170 transitions. [2020-12-22 06:02:53,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:02:53,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 4170 transitions. [2020-12-22 06:02:53,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 06:02:53,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:02:53,947 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 06:02:53,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:02:53,947 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 06:02:53,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:02:53,948 INFO L82 PathProgramCache]: Analyzing trace with hash -616044819, now seen corresponding path program 1 times [2020-12-22 06:02:53,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:02:53,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524412457] [2020-12-22 06:02:53,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:02:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:02:54,019 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 06:02:54,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524412457] [2020-12-22 06:02:54,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:02:54,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:02:54,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620528752] [2020-12-22 06:02:54,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:02:54,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:02:54,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:02:54,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:02:54,022 INFO L87 Difference]: Start difference. First operand 2202 states and 4170 transitions. Second operand 4 states. [2020-12-22 06:02:54,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:02:54,185 INFO L93 Difference]: Finished difference Result 4361 states and 8277 transitions. [2020-12-22 06:02:54,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:02:54,186 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-12-22 06:02:54,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:02:54,199 INFO L225 Difference]: With dead ends: 4361 [2020-12-22 06:02:54,200 INFO L226 Difference]: Without dead ends: 2202 [2020-12-22 06:02:54,205 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 06:02:54,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2020-12-22 06:02:54,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 2202. [2020-12-22 06:02:54,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2202 states. [2020-12-22 06:02:54,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 4166 transitions. [2020-12-22 06:02:54,340 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 4166 transitions. Word has length 48 [2020-12-22 06:02:54,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:02:54,340 INFO L481 AbstractCegarLoop]: Abstraction has 2202 states and 4166 transitions. [2020-12-22 06:02:54,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:02:54,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 4166 transitions. [2020-12-22 06:02:54,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 06:02:54,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:02:54,343 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 06:02:54,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:02:54,343 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 06:02:54,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:02:54,344 INFO L82 PathProgramCache]: Analyzing trace with hash 954153581, now seen corresponding path program 1 times [2020-12-22 06:02:54,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:02:54,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799178667] [2020-12-22 06:02:54,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:02:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:02:54,432 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 06:02:54,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799178667] [2020-12-22 06:02:54,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:02:54,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:02:54,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782775274] [2020-12-22 06:02:54,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:02:54,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:02:54,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:02:54,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:02:54,436 INFO L87 Difference]: Start difference. First operand 2202 states and 4166 transitions. Second operand 4 states. [2020-12-22 06:02:54,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:02:54,562 INFO L93 Difference]: Finished difference Result 4361 states and 8273 transitions. [2020-12-22 06:02:54,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:02:54,562 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-12-22 06:02:54,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:02:54,576 INFO L225 Difference]: With dead ends: 4361 [2020-12-22 06:02:54,576 INFO L226 Difference]: Without dead ends: 2181 [2020-12-22 06:02:54,580 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 06:02:54,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2020-12-22 06:02:54,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2181. [2020-12-22 06:02:54,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2181 states. [2020-12-22 06:02:54,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 4132 transitions. [2020-12-22 06:02:54,668 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 4132 transitions. Word has length 48 [2020-12-22 06:02:54,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:02:54,669 INFO L481 AbstractCegarLoop]: Abstraction has 2181 states and 4132 transitions. [2020-12-22 06:02:54,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:02:54,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 4132 transitions. [2020-12-22 06:02:54,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 06:02:54,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:02:54,671 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 06:02:54,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:02:54,672 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 06:02:54,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:02:54,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1674380072, now seen corresponding path program 1 times [2020-12-22 06:02:54,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:02:54,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978403122] [2020-12-22 06:02:54,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:02:54,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:02:54,736 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 06:02:54,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978403122] [2020-12-22 06:02:54,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:02:54,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:02:54,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818724676] [2020-12-22 06:02:54,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:02:54,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:02:54,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:02:54,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:02:54,739 INFO L87 Difference]: Start difference. First operand 2181 states and 4132 transitions. Second operand 4 states. [2020-12-22 06:02:54,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:02:54,884 INFO L93 Difference]: Finished difference Result 4340 states and 8239 transitions. [2020-12-22 06:02:54,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:02:54,885 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-12-22 06:02:54,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:02:54,898 INFO L225 Difference]: With dead ends: 4340 [2020-12-22 06:02:54,899 INFO L226 Difference]: Without dead ends: 2181 [2020-12-22 06:02:54,903 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 06:02:54,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2020-12-22 06:02:54,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2181. [2020-12-22 06:02:54,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2181 states. [2020-12-22 06:02:54,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 4131 transitions. [2020-12-22 06:02:54,993 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 4131 transitions. Word has length 49 [2020-12-22 06:02:54,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:02:54,994 INFO L481 AbstractCegarLoop]: Abstraction has 2181 states and 4131 transitions. [2020-12-22 06:02:54,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:02:54,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 4131 transitions. [2020-12-22 06:02:54,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 06:02:54,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:02:54,996 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 06:02:54,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:02:54,997 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 06:02:54,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:02:54,997 INFO L82 PathProgramCache]: Analyzing trace with hash -280311704, now seen corresponding path program 1 times [2020-12-22 06:02:54,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:02:54,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235346943] [2020-12-22 06:02:54,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:02:55,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:02:55,146 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 06:02:55,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235346943] [2020-12-22 06:02:55,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:02:55,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:02:55,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308252922] [2020-12-22 06:02:55,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:02:55,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:02:55,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:02:55,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:02:55,151 INFO L87 Difference]: Start difference. First operand 2181 states and 4131 transitions. Second operand 4 states. [2020-12-22 06:02:55,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:02:55,288 INFO L93 Difference]: Finished difference Result 4340 states and 8238 transitions. [2020-12-22 06:02:55,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:02:55,288 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-12-22 06:02:55,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:02:55,302 INFO L225 Difference]: With dead ends: 4340 [2020-12-22 06:02:55,302 INFO L226 Difference]: Without dead ends: 2181 [2020-12-22 06:02:55,307 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 06:02:55,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2020-12-22 06:02:55,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2181. [2020-12-22 06:02:55,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2181 states. [2020-12-22 06:02:55,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 4130 transitions. [2020-12-22 06:02:55,397 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 4130 transitions. Word has length 50 [2020-12-22 06:02:55,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:02:55,398 INFO L481 AbstractCegarLoop]: Abstraction has 2181 states and 4130 transitions. [2020-12-22 06:02:55,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:02:55,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 4130 transitions. [2020-12-22 06:02:55,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 06:02:55,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:02:55,401 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 06:02:55,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:02:55,401 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 06:02:55,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:02:55,401 INFO L82 PathProgramCache]: Analyzing trace with hash -689633981, now seen corresponding path program 1 times [2020-12-22 06:02:55,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:02:55,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081852168] [2020-12-22 06:02:55,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:02:55,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:02:55,521 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 06:02:55,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081852168] [2020-12-22 06:02:55,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:02:55,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:02:55,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583469858] [2020-12-22 06:02:55,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:02:55,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:02:55,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:02:55,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:02:55,532 INFO L87 Difference]: Start difference. First operand 2181 states and 4130 transitions. Second operand 7 states. [2020-12-22 06:02:55,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:02:55,765 INFO L93 Difference]: Finished difference Result 4334 states and 8226 transitions. [2020-12-22 06:02:55,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:02:55,766 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2020-12-22 06:02:55,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:02:55,779 INFO L225 Difference]: With dead ends: 4334 [2020-12-22 06:02:55,779 INFO L226 Difference]: Without dead ends: 2181 [2020-12-22 06:02:55,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-22 06:02:55,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2020-12-22 06:02:55,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2181. [2020-12-22 06:02:55,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2181 states. [2020-12-22 06:02:55,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 4129 transitions. [2020-12-22 06:02:55,872 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 4129 transitions. Word has length 51 [2020-12-22 06:02:55,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:02:55,873 INFO L481 AbstractCegarLoop]: Abstraction has 2181 states and 4129 transitions. [2020-12-22 06:02:55,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:02:55,873 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 4129 transitions. [2020-12-22 06:02:55,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 06:02:55,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:02:55,875 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 06:02:55,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 06:02:55,875 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 06:02:55,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:02:55,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1997109485, now seen corresponding path program 1 times [2020-12-22 06:02:55,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:02:55,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711496755] [2020-12-22 06:02:55,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:02:55,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:02:55,940 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 06:02:55,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711496755] [2020-12-22 06:02:55,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:02:55,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:02:55,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514456352] [2020-12-22 06:02:55,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:02:55,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:02:55,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:02:55,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:02:55,943 INFO L87 Difference]: Start difference. First operand 2181 states and 4129 transitions. Second operand 5 states. [2020-12-22 06:02:57,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:02:57,619 INFO L93 Difference]: Finished difference Result 8771 states and 16589 transitions. [2020-12-22 06:02:57,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:02:57,619 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-12-22 06:02:57,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:02:57,653 INFO L225 Difference]: With dead ends: 8771 [2020-12-22 06:02:57,653 INFO L226 Difference]: Without dead ends: 6633 [2020-12-22 06:02:57,659 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 06:02:57,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6633 states. [2020-12-22 06:02:57,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6633 to 2185. [2020-12-22 06:02:57,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2185 states. [2020-12-22 06:02:57,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2185 states to 2185 states and 4133 transitions. [2020-12-22 06:02:57,833 INFO L78 Accepts]: Start accepts. Automaton has 2185 states and 4133 transitions. Word has length 52 [2020-12-22 06:02:57,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:02:57,833 INFO L481 AbstractCegarLoop]: Abstraction has 2185 states and 4133 transitions. [2020-12-22 06:02:57,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:02:57,833 INFO L276 IsEmpty]: Start isEmpty. Operand 2185 states and 4133 transitions. [2020-12-22 06:02:57,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 06:02:57,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:02:57,836 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 06:02:57,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:02:57,836 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 06:02:57,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:02:57,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1606415413, now seen corresponding path program 1 times [2020-12-22 06:02:57,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:02:57,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140228059] [2020-12-22 06:02:57,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:02:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:02:57,908 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 06:02:57,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140228059] [2020-12-22 06:02:57,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:02:57,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:02:57,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616579416] [2020-12-22 06:02:57,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:02:57,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:02:57,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:02:57,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:02:57,910 INFO L87 Difference]: Start difference. First operand 2185 states and 4133 transitions. Second operand 4 states. [2020-12-22 06:02:59,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:02:59,429 INFO L93 Difference]: Finished difference Result 6343 states and 11958 transitions. [2020-12-22 06:02:59,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:02:59,430 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-12-22 06:02:59,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:02:59,442 INFO L225 Difference]: With dead ends: 6343 [2020-12-22 06:02:59,442 INFO L226 Difference]: Without dead ends: 4188 [2020-12-22 06:02:59,447 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 06:02:59,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2020-12-22 06:02:59,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 2978. [2020-12-22 06:02:59,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2978 states. [2020-12-22 06:02:59,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 5578 transitions. [2020-12-22 06:02:59,593 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 5578 transitions. Word has length 53 [2020-12-22 06:02:59,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:02:59,594 INFO L481 AbstractCegarLoop]: Abstraction has 2978 states and 5578 transitions. [2020-12-22 06:02:59,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:02:59,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 5578 transitions. [2020-12-22 06:02:59,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 06:02:59,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:02:59,596 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 06:02:59,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 06:02:59,596 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 06:02:59,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:02:59,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1383941645, now seen corresponding path program 1 times [2020-12-22 06:02:59,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:02:59,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622793645] [2020-12-22 06:02:59,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:02:59,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:02:59,665 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 06:02:59,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622793645] [2020-12-22 06:02:59,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:02:59,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:02:59,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447346354] [2020-12-22 06:02:59,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:02:59,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:02:59,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:02:59,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:02:59,668 INFO L87 Difference]: Start difference. First operand 2978 states and 5578 transitions. Second operand 5 states. [2020-12-22 06:03:00,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:03:00,623 INFO L93 Difference]: Finished difference Result 21564 states and 40597 transitions. [2020-12-22 06:03:00,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:03:00,624 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 06:03:00,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:03:00,698 INFO L225 Difference]: With dead ends: 21564 [2020-12-22 06:03:00,698 INFO L226 Difference]: Without dead ends: 18625 [2020-12-22 06:03:00,707 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 06:03:00,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18625 states. [2020-12-22 06:03:01,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18625 to 5502. [2020-12-22 06:03:01,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5502 states. [2020-12-22 06:03:01,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5502 states to 5502 states and 10348 transitions. [2020-12-22 06:03:01,068 INFO L78 Accepts]: Start accepts. Automaton has 5502 states and 10348 transitions. Word has length 55 [2020-12-22 06:03:01,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:03:01,069 INFO L481 AbstractCegarLoop]: Abstraction has 5502 states and 10348 transitions. [2020-12-22 06:03:01,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:03:01,069 INFO L276 IsEmpty]: Start isEmpty. Operand 5502 states and 10348 transitions. [2020-12-22 06:03:01,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 06:03:01,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:03:01,070 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 06:03:01,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:03:01,071 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 06:03:01,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:03:01,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1517955151, now seen corresponding path program 1 times [2020-12-22 06:03:01,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:03:01,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945876141] [2020-12-22 06:03:01,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:03:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:03:01,147 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 06:03:01,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945876141] [2020-12-22 06:03:01,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:03:01,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:03:01,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560283126] [2020-12-22 06:03:01,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:03:01,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:03:01,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:03:01,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:03:01,149 INFO L87 Difference]: Start difference. First operand 5502 states and 10348 transitions. Second operand 4 states. [2020-12-22 06:03:01,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:03:01,702 INFO L93 Difference]: Finished difference Result 13433 states and 25236 transitions. [2020-12-22 06:03:01,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:03:01,703 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-12-22 06:03:01,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:03:01,734 INFO L225 Difference]: With dead ends: 13433 [2020-12-22 06:03:01,734 INFO L226 Difference]: Without dead ends: 11057 [2020-12-22 06:03:01,741 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 06:03:01,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11057 states. [2020-12-22 06:03:02,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11057 to 7627. [2020-12-22 06:03:02,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7627 states. [2020-12-22 06:03:02,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7627 states to 7627 states and 14335 transitions. [2020-12-22 06:03:02,084 INFO L78 Accepts]: Start accepts. Automaton has 7627 states and 14335 transitions. Word has length 55 [2020-12-22 06:03:02,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:03:02,085 INFO L481 AbstractCegarLoop]: Abstraction has 7627 states and 14335 transitions. [2020-12-22 06:03:02,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:03:02,085 INFO L276 IsEmpty]: Start isEmpty. Operand 7627 states and 14335 transitions. [2020-12-22 06:03:02,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 06:03:02,086 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:03:02,087 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 06:03:02,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 06:03:02,087 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 06:03:02,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:03:02,088 INFO L82 PathProgramCache]: Analyzing trace with hash -464517445, now seen corresponding path program 1 times [2020-12-22 06:03:02,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:03:02,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781448610] [2020-12-22 06:03:02,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:03:02,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:03:02,154 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 06:03:02,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781448610] [2020-12-22 06:03:02,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:03:02,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:03:02,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335666568] [2020-12-22 06:03:02,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:03:02,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:03:02,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:03:02,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:03:02,157 INFO L87 Difference]: Start difference. First operand 7627 states and 14335 transitions. Second operand 4 states. [2020-12-22 06:03:02,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:03:02,768 INFO L93 Difference]: Finished difference Result 15813 states and 29607 transitions. [2020-12-22 06:03:02,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:03:02,769 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-12-22 06:03:02,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:03:02,799 INFO L225 Difference]: With dead ends: 15813 [2020-12-22 06:03:02,799 INFO L226 Difference]: Without dead ends: 11501 [2020-12-22 06:03:02,809 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 06:03:02,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11501 states. [2020-12-22 06:03:03,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11501 to 7637. [2020-12-22 06:03:03,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7637 states. [2020-12-22 06:03:03,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7637 states to 7637 states and 14341 transitions. [2020-12-22 06:03:03,190 INFO L78 Accepts]: Start accepts. Automaton has 7637 states and 14341 transitions. Word has length 57 [2020-12-22 06:03:03,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:03:03,191 INFO L481 AbstractCegarLoop]: Abstraction has 7637 states and 14341 transitions. [2020-12-22 06:03:03,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:03:03,191 INFO L276 IsEmpty]: Start isEmpty. Operand 7637 states and 14341 transitions. [2020-12-22 06:03:03,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 06:03:03,193 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:03:03,193 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 06:03:03,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:03:03,194 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 06:03:03,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:03:03,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1096971804, now seen corresponding path program 1 times [2020-12-22 06:03:03,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:03:03,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111797495] [2020-12-22 06:03:03,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:03:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:03:03,278 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 06:03:03,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111797495] [2020-12-22 06:03:03,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:03:03,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:03:03,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30907719] [2020-12-22 06:03:03,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:03:03,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:03:03,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:03:03,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:03:03,280 INFO L87 Difference]: Start difference. First operand 7637 states and 14341 transitions. Second operand 7 states. [2020-12-22 06:03:04,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:03:04,906 INFO L93 Difference]: Finished difference Result 20051 states and 37604 transitions. [2020-12-22 06:03:04,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 06:03:04,907 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 63 [2020-12-22 06:03:04,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:03:04,947 INFO L225 Difference]: With dead ends: 20051 [2020-12-22 06:03:04,948 INFO L226 Difference]: Without dead ends: 15560 [2020-12-22 06:03:04,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-22 06:03:04,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15560 states. [2020-12-22 06:03:05,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15560 to 7641. [2020-12-22 06:03:05,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7641 states. [2020-12-22 06:03:05,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7641 states to 7641 states and 14339 transitions. [2020-12-22 06:03:05,388 INFO L78 Accepts]: Start accepts. Automaton has 7641 states and 14339 transitions. Word has length 63 [2020-12-22 06:03:05,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:03:05,388 INFO L481 AbstractCegarLoop]: Abstraction has 7641 states and 14339 transitions. [2020-12-22 06:03:05,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:03:05,388 INFO L276 IsEmpty]: Start isEmpty. Operand 7641 states and 14339 transitions. [2020-12-22 06:03:05,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 06:03:05,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:03:05,391 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 06:03:05,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 06:03:05,391 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 06:03:05,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:03:05,392 INFO L82 PathProgramCache]: Analyzing trace with hash -878117086, now seen corresponding path program 1 times [2020-12-22 06:03:05,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:03:05,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478131083] [2020-12-22 06:03:05,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:03:05,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:03:05,457 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 06:03:05,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478131083] [2020-12-22 06:03:05,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:03:05,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:03:05,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795351142] [2020-12-22 06:03:05,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:03:05,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:03:05,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:03:05,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:03:05,459 INFO L87 Difference]: Start difference. First operand 7641 states and 14339 transitions. Second operand 5 states. [2020-12-22 06:03:05,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:03:05,950 INFO L93 Difference]: Finished difference Result 11952 states and 22418 transitions. [2020-12-22 06:03:05,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:03:05,950 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 06:03:05,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:03:05,964 INFO L225 Difference]: With dead ends: 11952 [2020-12-22 06:03:05,964 INFO L226 Difference]: Without dead ends: 7660 [2020-12-22 06:03:05,972 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 06:03:05,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7660 states. [2020-12-22 06:03:06,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7660 to 7641. [2020-12-22 06:03:06,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7641 states. [2020-12-22 06:03:06,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7641 states to 7641 states and 14324 transitions. [2020-12-22 06:03:06,322 INFO L78 Accepts]: Start accepts. Automaton has 7641 states and 14324 transitions. Word has length 63 [2020-12-22 06:03:06,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:03:06,323 INFO L481 AbstractCegarLoop]: Abstraction has 7641 states and 14324 transitions. [2020-12-22 06:03:06,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:03:06,323 INFO L276 IsEmpty]: Start isEmpty. Operand 7641 states and 14324 transitions. [2020-12-22 06:03:06,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 06:03:06,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:03:06,324 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 06:03:06,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 06:03:06,325 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 06:03:06,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:03:06,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1464923100, now seen corresponding path program 1 times [2020-12-22 06:03:06,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:03:06,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016326595] [2020-12-22 06:03:06,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:03:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:03:06,385 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 06:03:06,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016326595] [2020-12-22 06:03:06,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:03:06,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:03:06,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108883679] [2020-12-22 06:03:06,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:03:06,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:03:06,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:03:06,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:03:06,387 INFO L87 Difference]: Start difference. First operand 7641 states and 14324 transitions. Second operand 3 states. [2020-12-22 06:03:06,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:03:06,973 INFO L93 Difference]: Finished difference Result 21012 states and 39468 transitions. [2020-12-22 06:03:06,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:03:06,974 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 06:03:06,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:03:06,991 INFO L225 Difference]: With dead ends: 21012 [2020-12-22 06:03:06,991 INFO L226 Difference]: Without dead ends: 14841 [2020-12-22 06:03:07,002 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 06:03:07,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14841 states. [2020-12-22 06:03:07,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14841 to 14841. [2020-12-22 06:03:07,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14841 states. [2020-12-22 06:03:07,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14841 states to 14841 states and 27893 transitions. [2020-12-22 06:03:07,875 INFO L78 Accepts]: Start accepts. Automaton has 14841 states and 27893 transitions. Word has length 63 [2020-12-22 06:03:07,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:03:07,875 INFO L481 AbstractCegarLoop]: Abstraction has 14841 states and 27893 transitions. [2020-12-22 06:03:07,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:03:07,876 INFO L276 IsEmpty]: Start isEmpty. Operand 14841 states and 27893 transitions. [2020-12-22 06:03:07,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 06:03:07,880 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:03:07,881 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 06:03:07,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 06:03:07,881 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 06:03:07,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:03:07,881 INFO L82 PathProgramCache]: Analyzing trace with hash 2082747072, now seen corresponding path program 1 times [2020-12-22 06:03:07,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:03:07,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308044364] [2020-12-22 06:03:07,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:03:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:03:07,964 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 06:03:07,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308044364] [2020-12-22 06:03:07,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:03:07,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:03:07,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297772189] [2020-12-22 06:03:07,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:03:07,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:03:07,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:03:07,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:03:07,970 INFO L87 Difference]: Start difference. First operand 14841 states and 27893 transitions. Second operand 3 states. [2020-12-22 06:03:08,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:03:08,943 INFO L93 Difference]: Finished difference Result 41281 states and 77618 transitions. [2020-12-22 06:03:08,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:03:08,944 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 06:03:08,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:03:08,980 INFO L225 Difference]: With dead ends: 41281 [2020-12-22 06:03:08,980 INFO L226 Difference]: Without dead ends: 29027 [2020-12-22 06:03:08,998 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 06:03:09,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29027 states. [2020-12-22 06:03:10,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29027 to 29025. [2020-12-22 06:03:10,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29025 states. [2020-12-22 06:03:10,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29025 states to 29025 states and 54613 transitions. [2020-12-22 06:03:10,489 INFO L78 Accepts]: Start accepts. Automaton has 29025 states and 54613 transitions. Word has length 65 [2020-12-22 06:03:10,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:03:10,489 INFO L481 AbstractCegarLoop]: Abstraction has 29025 states and 54613 transitions. [2020-12-22 06:03:10,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:03:10,490 INFO L276 IsEmpty]: Start isEmpty. Operand 29025 states and 54613 transitions. [2020-12-22 06:03:10,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 06:03:10,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:03:10,492 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 06:03:10,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 06:03:10,492 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 06:03:10,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:03:10,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1043936057, now seen corresponding path program 1 times [2020-12-22 06:03:10,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:03:10,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879123798] [2020-12-22 06:03:10,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:03:10,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:03:10,554 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 06:03:10,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879123798] [2020-12-22 06:03:10,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:03:10,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:03:10,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135577618] [2020-12-22 06:03:10,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:03:10,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:03:10,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:03:10,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:03:10,557 INFO L87 Difference]: Start difference. First operand 29025 states and 54613 transitions. Second operand 3 states. [2020-12-22 06:03:12,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:03:12,665 INFO L93 Difference]: Finished difference Result 81356 states and 153025 transitions. [2020-12-22 06:03:12,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:03:12,670 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 06:03:12,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:03:12,785 INFO L225 Difference]: With dead ends: 81356 [2020-12-22 06:03:12,785 INFO L226 Difference]: Without dead ends: 56955 [2020-12-22 06:03:12,814 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 06:03:12,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56955 states. [2020-12-22 06:03:15,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56955 to 56951. [2020-12-22 06:03:15,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56951 states. [2020-12-22 06:03:15,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56951 states to 56951 states and 107197 transitions. [2020-12-22 06:03:15,138 INFO L78 Accepts]: Start accepts. Automaton has 56951 states and 107197 transitions. Word has length 66 [2020-12-22 06:03:15,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:03:15,138 INFO L481 AbstractCegarLoop]: Abstraction has 56951 states and 107197 transitions. [2020-12-22 06:03:15,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:03:15,138 INFO L276 IsEmpty]: Start isEmpty. Operand 56951 states and 107197 transitions. [2020-12-22 06:03:15,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 06:03:15,142 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:03:15,142 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 06:03:15,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 06:03:15,142 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 06:03:15,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:03:15,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1997737319, now seen corresponding path program 1 times [2020-12-22 06:03:15,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:03:15,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777811410] [2020-12-22 06:03:15,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:03:15,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:03:15,202 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 06:03:15,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777811410] [2020-12-22 06:03:15,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:03:15,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:03:15,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906797624] [2020-12-22 06:03:15,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:03:15,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:03:15,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:03:15,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:03:15,204 INFO L87 Difference]: Start difference. First operand 56951 states and 107197 transitions. Second operand 3 states. [2020-12-22 06:03:18,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:03:18,925 INFO L93 Difference]: Finished difference Result 160563 states and 302018 transitions. [2020-12-22 06:03:18,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:03:18,925 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 06:03:18,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:03:19,138 INFO L225 Difference]: With dead ends: 160563 [2020-12-22 06:03:19,138 INFO L226 Difference]: Without dead ends: 111915 [2020-12-22 06:03:19,190 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 06:03:19,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111915 states. [2020-12-22 06:03:23,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111915 to 111909. [2020-12-22 06:03:23,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111909 states. [2020-12-22 06:03:23,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111909 states to 111909 states and 210633 transitions. [2020-12-22 06:03:23,966 INFO L78 Accepts]: Start accepts. Automaton has 111909 states and 210633 transitions. Word has length 67 [2020-12-22 06:03:23,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:03:23,966 INFO L481 AbstractCegarLoop]: Abstraction has 111909 states and 210633 transitions. [2020-12-22 06:03:23,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:03:23,966 INFO L276 IsEmpty]: Start isEmpty. Operand 111909 states and 210633 transitions. [2020-12-22 06:03:23,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 06:03:23,970 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:03:23,970 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 06:03:23,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 06:03:23,971 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 06:03:23,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:03:23,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1800331472, now seen corresponding path program 1 times [2020-12-22 06:03:23,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:03:23,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408747030] [2020-12-22 06:03:23,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:03:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:03:24,048 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 06:03:24,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408747030] [2020-12-22 06:03:24,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:03:24,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:03:24,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040239186] [2020-12-22 06:03:24,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:03:24,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:03:24,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:03:24,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:03:24,052 INFO L87 Difference]: Start difference. First operand 111909 states and 210633 transitions. Second operand 3 states. [2020-12-22 06:03:31,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:03:31,306 INFO L93 Difference]: Finished difference Result 317074 states and 596326 transitions. [2020-12-22 06:03:31,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:03:31,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 06:03:31,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:03:31,786 INFO L225 Difference]: With dead ends: 317074 [2020-12-22 06:03:31,786 INFO L226 Difference]: Without dead ends: 220030 [2020-12-22 06:03:31,871 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 06:03:32,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220030 states. [2020-12-22 06:03:39,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220030 to 220022. [2020-12-22 06:03:39,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220022 states. [2020-12-22 06:03:40,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220022 states to 220022 states and 413994 transitions. [2020-12-22 06:03:40,884 INFO L78 Accepts]: Start accepts. Automaton has 220022 states and 413994 transitions. Word has length 68 [2020-12-22 06:03:40,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:03:40,884 INFO L481 AbstractCegarLoop]: Abstraction has 220022 states and 413994 transitions. [2020-12-22 06:03:40,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:03:40,885 INFO L276 IsEmpty]: Start isEmpty. Operand 220022 states and 413994 transitions. [2020-12-22 06:03:40,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 06:03:40,942 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:03:40,942 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] [2020-12-22 06:03:40,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 06:03:40,942 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 06:03:40,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:03:40,943 INFO L82 PathProgramCache]: Analyzing trace with hash 768939302, now seen corresponding path program 1 times [2020-12-22 06:03:40,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:03:40,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551848876] [2020-12-22 06:03:40,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:03:40,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:03:41,016 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 06:03:41,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551848876] [2020-12-22 06:03:41,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:03:41,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:03:41,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683853902] [2020-12-22 06:03:41,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:03:41,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:03:41,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:03:41,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:03:41,023 INFO L87 Difference]: Start difference. First operand 220022 states and 413994 transitions. Second operand 4 states. [2020-12-22 06:03:52,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:03:52,095 INFO L93 Difference]: Finished difference Result 493129 states and 920024 transitions. [2020-12-22 06:03:52,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:03:52,095 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2020-12-22 06:03:52,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:03:52,693 INFO L225 Difference]: With dead ends: 493129 [2020-12-22 06:03:52,694 INFO L226 Difference]: Without dead ends: 273311 [2020-12-22 06:03:52,890 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 06:03:53,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273311 states. [2020-12-22 06:04:01,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273311 to 220408. [2020-12-22 06:04:01,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220408 states. [2020-12-22 06:04:02,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220408 states to 220408 states and 414380 transitions. [2020-12-22 06:04:02,887 INFO L78 Accepts]: Start accepts. Automaton has 220408 states and 414380 transitions. Word has length 98 [2020-12-22 06:04:02,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:02,887 INFO L481 AbstractCegarLoop]: Abstraction has 220408 states and 414380 transitions. [2020-12-22 06:04:02,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:04:02,887 INFO L276 IsEmpty]: Start isEmpty. Operand 220408 states and 414380 transitions. [2020-12-22 06:04:02,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 06:04:02,918 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:02,918 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] [2020-12-22 06:04:02,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 06:04:02,919 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 06:04:02,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:02,919 INFO L82 PathProgramCache]: Analyzing trace with hash 27783116, now seen corresponding path program 1 times [2020-12-22 06:04:02,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:02,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748086349] [2020-12-22 06:04:02,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:02,994 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 06:04:02,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748086349] [2020-12-22 06:04:02,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:02,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:04:02,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727391303] [2020-12-22 06:04:02,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:04:02,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:02,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:04:02,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:04:02,997 INFO L87 Difference]: Start difference. First operand 220408 states and 414380 transitions. Second operand 4 states. [2020-12-22 06:04:13,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:13,502 INFO L93 Difference]: Finished difference Result 492579 states and 924485 transitions. [2020-12-22 06:04:13,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:04:13,503 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2020-12-22 06:04:13,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:14,302 INFO L225 Difference]: With dead ends: 492579 [2020-12-22 06:04:14,302 INFO L226 Difference]: Without dead ends: 272204 [2020-12-22 06:04:14,442 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 06:04:14,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272204 states. [2020-12-22 06:04:21,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272204 to 136009. [2020-12-22 06:04:21,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136009 states. [2020-12-22 06:04:21,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136009 states to 136009 states and 255251 transitions. [2020-12-22 06:04:21,727 INFO L78 Accepts]: Start accepts. Automaton has 136009 states and 255251 transitions. Word has length 99 [2020-12-22 06:04:21,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:21,729 INFO L481 AbstractCegarLoop]: Abstraction has 136009 states and 255251 transitions. [2020-12-22 06:04:21,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:04:21,729 INFO L276 IsEmpty]: Start isEmpty. Operand 136009 states and 255251 transitions. [2020-12-22 06:04:21,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-22 06:04:21,782 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:21,782 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] [2020-12-22 06:04:21,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 06:04:21,783 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 06:04:21,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:21,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1275722056, now seen corresponding path program 1 times [2020-12-22 06:04:21,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:21,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534045207] [2020-12-22 06:04:21,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:21,889 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 06:04:21,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534045207] [2020-12-22 06:04:21,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:21,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:04:21,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148575176] [2020-12-22 06:04:21,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:04:21,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:21,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:04:21,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:04:21,892 INFO L87 Difference]: Start difference. First operand 136009 states and 255251 transitions. Second operand 5 states. [2020-12-22 06:04:33,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:33,818 INFO L93 Difference]: Finished difference Result 393047 states and 737638 transitions. [2020-12-22 06:04:33,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:04:33,823 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2020-12-22 06:04:33,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:34,584 INFO L225 Difference]: With dead ends: 393047 [2020-12-22 06:04:34,584 INFO L226 Difference]: Without dead ends: 257236 [2020-12-22 06:04:34,711 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 06:04:34,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257236 states. [2020-12-22 06:04:41,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257236 to 136009. [2020-12-22 06:04:41,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136009 states. [2020-12-22 06:04:42,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136009 states to 136009 states and 255123 transitions. [2020-12-22 06:04:42,188 INFO L78 Accepts]: Start accepts. Automaton has 136009 states and 255123 transitions. Word has length 141 [2020-12-22 06:04:42,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:04:42,188 INFO L481 AbstractCegarLoop]: Abstraction has 136009 states and 255123 transitions. [2020-12-22 06:04:42,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:04:42,188 INFO L276 IsEmpty]: Start isEmpty. Operand 136009 states and 255123 transitions. [2020-12-22 06:04:42,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-22 06:04:42,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:04:42,224 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] [2020-12-22 06:04:42,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 06:04:42,224 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 06:04:42,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:04:42,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1636949456, now seen corresponding path program 1 times [2020-12-22 06:04:42,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:04:42,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531615448] [2020-12-22 06:04:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:04:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:04:42,332 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 06:04:42,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531615448] [2020-12-22 06:04:42,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:04:42,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:04:42,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059812036] [2020-12-22 06:04:42,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:04:42,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:04:42,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:04:42,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:04:42,334 INFO L87 Difference]: Start difference. First operand 136009 states and 255123 transitions. Second operand 5 states. [2020-12-22 06:04:52,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:04:52,950 INFO L93 Difference]: Finished difference Result 388354 states and 730143 transitions. [2020-12-22 06:04:52,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:04:52,950 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2020-12-22 06:04:52,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:04:53,600 INFO L225 Difference]: With dead ends: 388354 [2020-12-22 06:04:53,600 INFO L226 Difference]: Without dead ends: 252396 [2020-12-22 06:04:53,702 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 06:04:53,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252396 states. [2020-12-22 06:05:00,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252396 to 136009. [2020-12-22 06:05:00,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136009 states. [2020-12-22 06:05:01,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136009 states to 136009 states and 252811 transitions. [2020-12-22 06:05:01,117 INFO L78 Accepts]: Start accepts. Automaton has 136009 states and 252811 transitions. Word has length 145 [2020-12-22 06:05:01,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:01,118 INFO L481 AbstractCegarLoop]: Abstraction has 136009 states and 252811 transitions. [2020-12-22 06:05:01,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:05:01,118 INFO L276 IsEmpty]: Start isEmpty. Operand 136009 states and 252811 transitions. [2020-12-22 06:05:01,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-22 06:05:01,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:01,204 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] [2020-12-22 06:05:01,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 06:05:01,204 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 06:05:01,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:01,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1840184499, now seen corresponding path program 1 times [2020-12-22 06:05:01,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:01,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354820504] [2020-12-22 06:05:01,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:01,379 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 06:05:01,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354820504] [2020-12-22 06:05:01,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:01,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:05:01,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230340135] [2020-12-22 06:05:01,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:05:01,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:01,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:05:01,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:05:01,381 INFO L87 Difference]: Start difference. First operand 136009 states and 252811 transitions. Second operand 5 states. [2020-12-22 06:05:12,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:12,703 INFO L93 Difference]: Finished difference Result 390799 states and 728259 transitions. [2020-12-22 06:05:12,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:05:12,703 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-12-22 06:05:12,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:13,297 INFO L225 Difference]: With dead ends: 390799 [2020-12-22 06:05:13,298 INFO L226 Difference]: Without dead ends: 254988 [2020-12-22 06:05:13,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:05:13,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254988 states. [2020-12-22 06:05:24,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254988 to 254025. [2020-12-22 06:05:24,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254025 states. [2020-12-22 06:05:25,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254025 states to 254025 states and 474047 transitions. [2020-12-22 06:05:25,367 INFO L78 Accepts]: Start accepts. Automaton has 254025 states and 474047 transitions. Word has length 146 [2020-12-22 06:05:25,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:25,367 INFO L481 AbstractCegarLoop]: Abstraction has 254025 states and 474047 transitions. [2020-12-22 06:05:25,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:05:25,367 INFO L276 IsEmpty]: Start isEmpty. Operand 254025 states and 474047 transitions. [2020-12-22 06:05:25,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-22 06:05:25,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:25,426 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] [2020-12-22 06:05:25,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 06:05:25,426 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 06:05:25,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:25,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1477116820, now seen corresponding path program 1 times [2020-12-22 06:05:25,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:25,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015785054] [2020-12-22 06:05:25,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:25,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:25,580 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 06:05:25,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015785054] [2020-12-22 06:05:25,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:25,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:05:25,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979475687] [2020-12-22 06:05:25,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:05:25,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:25,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:05:25,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:05:25,582 INFO L87 Difference]: Start difference. First operand 254025 states and 474047 transitions. Second operand 5 states. [2020-12-22 06:05:39,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:39,501 INFO L93 Difference]: Finished difference Result 525711 states and 978455 transitions. [2020-12-22 06:05:39,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:05:39,501 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2020-12-22 06:05:39,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:40,160 INFO L225 Difference]: With dead ends: 525711 [2020-12-22 06:05:40,160 INFO L226 Difference]: Without dead ends: 271884 [2020-12-22 06:05:40,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:05:41,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271884 states. [2020-12-22 06:05:54,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271884 to 253641. [2020-12-22 06:05:54,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253641 states. [2020-12-22 06:05:55,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253641 states to 253641 states and 473215 transitions. [2020-12-22 06:05:55,720 INFO L78 Accepts]: Start accepts. Automaton has 253641 states and 473215 transitions. Word has length 147 [2020-12-22 06:05:55,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:55,720 INFO L481 AbstractCegarLoop]: Abstraction has 253641 states and 473215 transitions. [2020-12-22 06:05:55,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:05:55,720 INFO L276 IsEmpty]: Start isEmpty. Operand 253641 states and 473215 transitions. [2020-12-22 06:05:55,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-22 06:05:55,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:55,763 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] [2020-12-22 06:05:55,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 06:05:55,764 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:05:55,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:55,764 INFO L82 PathProgramCache]: Analyzing trace with hash -2030357552, now seen corresponding path program 1 times [2020-12-22 06:05:55,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:55,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15033640] [2020-12-22 06:05:55,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:56,329 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 06:05:56,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15033640] [2020-12-22 06:05:56,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:56,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:05:56,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102103568] [2020-12-22 06:05:56,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:05:56,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:56,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:05:56,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:05:56,332 INFO L87 Difference]: Start difference. First operand 253641 states and 473215 transitions. Second operand 7 states.