/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_spec1_product26.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:01:28,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:01:28,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:01:28,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:01:28,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:01:28,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:01:28,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:01:28,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:01:28,993 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:01:28,994 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:01:28,995 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:01:28,996 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:01:28,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:01:28,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:01:28,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:01:29,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:01:29,001 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:01:29,002 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:01:29,004 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:01:29,007 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:01:29,008 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:01:29,010 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:01:29,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:01:29,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:01:29,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:01:29,029 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:01:29,029 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:01:29,030 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:01:29,031 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:01:29,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:01:29,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:01:29,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:01:29,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:01:29,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:01:29,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:01:29,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:01:29,037 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:01:29,064 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:01:29,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:01:29,066 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:01:29,066 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:01:29,067 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:01:29,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:01:29,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:01:29,067 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:01:29,067 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:01:29,068 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:01:29,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:01:29,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:01:29,068 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:01:29,068 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:01:29,069 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:01:29,069 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:01:29,069 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:01:29,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:01:29,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:01:29,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:01:29,070 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:01:29,070 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:01:29,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:01:29,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:01:29,070 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:01:29,071 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:01:29,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:01:29,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:01:29,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:01:29,482 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:01:29,483 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:01:29,484 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c [2020-12-22 06:01:29,571 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9da3847a/480cbc88616b45868eda892990a0dc58/FLAG751a3cfe4 [2020-12-22 06:01:30,466 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:01:30,466 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c [2020-12-22 06:01:30,488 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9da3847a/480cbc88616b45868eda892990a0dc58/FLAG751a3cfe4 [2020-12-22 06:01:30,619 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9da3847a/480cbc88616b45868eda892990a0dc58 [2020-12-22 06:01:30,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:01:30,624 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:01:30,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:01:30,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:01:30,630 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:01:30,631 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:01:30" (1/1) ... [2020-12-22 06:01:30,632 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@581f1c6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:01:30, skipping insertion in model container [2020-12-22 06:01:30,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:01:30" (1/1) ... [2020-12-22 06:01:30,641 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:01:30,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:01:31,310 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_spec1_product26.cil.c[55650,55663] [2020-12-22 06:01:31,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:01:31,344 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:01:31,527 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_spec1_product26.cil.c[55650,55663] [2020-12-22 06:01:31,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:01:31,604 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:01:31,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:01:31 WrapperNode [2020-12-22 06:01:31,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:01:31,606 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:01:31,606 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:01:31,606 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:01:31,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:01:31" (1/1) ... [2020-12-22 06:01:31,659 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:01:31" (1/1) ... [2020-12-22 06:01:31,972 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:01:31,973 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:01:31,973 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:01:31,973 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:01:31,984 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:01:31" (1/1) ... [2020-12-22 06:01:31,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:01:31" (1/1) ... [2020-12-22 06:01:32,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:01:31" (1/1) ... [2020-12-22 06:01:32,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:01:31" (1/1) ... [2020-12-22 06:01:32,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:01:31" (1/1) ... [2020-12-22 06:01:32,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:01:31" (1/1) ... [2020-12-22 06:01:32,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:01:31" (1/1) ... [2020-12-22 06:01:32,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:01:32,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:01:32,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:01:32,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:01:32,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:01:31" (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 06:01:32,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:01:32,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:01:32,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:01:32,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:01:42,351 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:01:42,352 INFO L299 CfgBuilder]: Removed 1089 assume(true) statements. [2020-12-22 06:01:42,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:01:42 BoogieIcfgContainer [2020-12-22 06:01:42,359 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:01:42,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:01:42,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:01:42,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:01:42,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:01:30" (1/3) ... [2020-12-22 06:01:42,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e89d58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:01:42, skipping insertion in model container [2020-12-22 06:01:42,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:01:31" (2/3) ... [2020-12-22 06:01:42,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e89d58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:01:42, skipping insertion in model container [2020-12-22 06:01:42,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:01:42" (3/3) ... [2020-12-22 06:01:42,369 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product26.cil.c [2020-12-22 06:01:42,376 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:01:42,383 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-22 06:01:42,404 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-22 06:01:42,454 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:01:42,454 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:01:42,454 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:01:42,454 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:01:42,454 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:01:42,455 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:01:42,455 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:01:42,455 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:01:42,540 INFO L276 IsEmpty]: Start isEmpty. Operand 4799 states. [2020-12-22 06:01:42,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 06:01:42,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:01:42,554 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] [2020-12-22 06:01:42,555 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 06:01:42,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:01:42,562 INFO L82 PathProgramCache]: Analyzing trace with hash -742014273, now seen corresponding path program 1 times [2020-12-22 06:01:42,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:01:42,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735407726] [2020-12-22 06:01:42,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:01:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:01:43,037 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 06:01:43,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735407726] [2020-12-22 06:01:43,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:01:43,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:01:43,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703431248] [2020-12-22 06:01:43,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:01:43,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:01:43,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:01:43,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:01:43,065 INFO L87 Difference]: Start difference. First operand 4799 states. Second operand 3 states. [2020-12-22 06:01:43,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:01:43,704 INFO L93 Difference]: Finished difference Result 14317 states and 27059 transitions. [2020-12-22 06:01:43,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:01:43,706 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-12-22 06:01:43,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:01:43,820 INFO L225 Difference]: With dead ends: 14317 [2020-12-22 06:01:43,820 INFO L226 Difference]: Without dead ends: 9523 [2020-12-22 06:01:43,844 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 06:01:43,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9523 states. [2020-12-22 06:01:44,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9523 to 4795. [2020-12-22 06:01:44,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4795 states. [2020-12-22 06:01:44,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4795 states to 4795 states and 9050 transitions. [2020-12-22 06:01:44,155 INFO L78 Accepts]: Start accepts. Automaton has 4795 states and 9050 transitions. Word has length 36 [2020-12-22 06:01:44,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:01:44,155 INFO L481 AbstractCegarLoop]: Abstraction has 4795 states and 9050 transitions. [2020-12-22 06:01:44,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:01:44,156 INFO L276 IsEmpty]: Start isEmpty. Operand 4795 states and 9050 transitions. [2020-12-22 06:01:44,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 06:01:44,168 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:01:44,168 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] [2020-12-22 06:01:44,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:01:44,170 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 06:01:44,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:01:44,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1164498936, now seen corresponding path program 1 times [2020-12-22 06:01:44,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:01:44,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099632453] [2020-12-22 06:01:44,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:01:44,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:01:44,359 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 06:01:44,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099632453] [2020-12-22 06:01:44,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:01:44,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:01:44,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172377300] [2020-12-22 06:01:44,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:01:44,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:01:44,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:01:44,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:01:44,365 INFO L87 Difference]: Start difference. First operand 4795 states and 9050 transitions. Second operand 4 states. [2020-12-22 06:01:45,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:01:45,130 INFO L93 Difference]: Finished difference Result 18934 states and 35755 transitions. [2020-12-22 06:01:45,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:01:45,131 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-12-22 06:01:45,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:01:45,213 INFO L225 Difference]: With dead ends: 18934 [2020-12-22 06:01:45,214 INFO L226 Difference]: Without dead ends: 14161 [2020-12-22 06:01:45,227 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 06:01:45,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14161 states. [2020-12-22 06:01:45,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14161 to 4771. [2020-12-22 06:01:45,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4771 states. [2020-12-22 06:01:45,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4771 states to 4771 states and 8997 transitions. [2020-12-22 06:01:45,615 INFO L78 Accepts]: Start accepts. Automaton has 4771 states and 8997 transitions. Word has length 43 [2020-12-22 06:01:45,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:01:45,616 INFO L481 AbstractCegarLoop]: Abstraction has 4771 states and 8997 transitions. [2020-12-22 06:01:45,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:01:45,616 INFO L276 IsEmpty]: Start isEmpty. Operand 4771 states and 8997 transitions. [2020-12-22 06:01:45,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 06:01:45,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:01:45,621 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] [2020-12-22 06:01:45,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:01:45,622 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 06:01:45,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:01:45,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1925359514, now seen corresponding path program 1 times [2020-12-22 06:01:45,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:01:45,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418626143] [2020-12-22 06:01:45,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:01:45,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:01:45,767 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 06:01:45,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418626143] [2020-12-22 06:01:45,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:01:45,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:01:45,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860359904] [2020-12-22 06:01:45,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:01:45,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:01:45,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:01:45,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:01:45,770 INFO L87 Difference]: Start difference. First operand 4771 states and 8997 transitions. Second operand 4 states. [2020-12-22 06:01:46,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:01:46,399 INFO L93 Difference]: Finished difference Result 14221 states and 26842 transitions. [2020-12-22 06:01:46,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:01:46,400 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-12-22 06:01:46,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:01:46,430 INFO L225 Difference]: With dead ends: 14221 [2020-12-22 06:01:46,430 INFO L226 Difference]: Without dead ends: 9472 [2020-12-22 06:01:46,441 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 06:01:46,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9472 states. [2020-12-22 06:01:46,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9472 to 4771. [2020-12-22 06:01:46,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4771 states. [2020-12-22 06:01:46,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4771 states to 4771 states and 8991 transitions. [2020-12-22 06:01:46,781 INFO L78 Accepts]: Start accepts. Automaton has 4771 states and 8991 transitions. Word has length 44 [2020-12-22 06:01:46,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:01:46,789 INFO L481 AbstractCegarLoop]: Abstraction has 4771 states and 8991 transitions. [2020-12-22 06:01:46,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:01:46,789 INFO L276 IsEmpty]: Start isEmpty. Operand 4771 states and 8991 transitions. [2020-12-22 06:01:46,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 06:01:46,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:01:46,791 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 06:01:46,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:01:46,791 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 06:01:46,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:01:46,792 INFO L82 PathProgramCache]: Analyzing trace with hash 41866987, now seen corresponding path program 1 times [2020-12-22 06:01:46,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:01:46,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128445949] [2020-12-22 06:01:46,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:01:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:01:46,895 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 06:01:46,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128445949] [2020-12-22 06:01:46,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:01:46,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:01:46,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817915216] [2020-12-22 06:01:46,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:01:46,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:01:46,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:01:46,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:01:46,899 INFO L87 Difference]: Start difference. First operand 4771 states and 8991 transitions. Second operand 4 states. [2020-12-22 06:01:47,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:01:47,557 INFO L93 Difference]: Finished difference Result 14221 states and 26830 transitions. [2020-12-22 06:01:47,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:01:47,558 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-12-22 06:01:47,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:01:47,585 INFO L225 Difference]: With dead ends: 14221 [2020-12-22 06:01:47,586 INFO L226 Difference]: Without dead ends: 9472 [2020-12-22 06:01:47,596 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 06:01:47,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9472 states. [2020-12-22 06:01:47,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9472 to 4771. [2020-12-22 06:01:47,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4771 states. [2020-12-22 06:01:47,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4771 states to 4771 states and 8985 transitions. [2020-12-22 06:01:47,945 INFO L78 Accepts]: Start accepts. Automaton has 4771 states and 8985 transitions. Word has length 46 [2020-12-22 06:01:47,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:01:47,945 INFO L481 AbstractCegarLoop]: Abstraction has 4771 states and 8985 transitions. [2020-12-22 06:01:47,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:01:47,946 INFO L276 IsEmpty]: Start isEmpty. Operand 4771 states and 8985 transitions. [2020-12-22 06:01:47,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 06:01:47,947 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:01:47,948 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 06:01:47,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:01:47,948 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 06:01:47,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:01:47,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1498288528, now seen corresponding path program 1 times [2020-12-22 06:01:47,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:01:47,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074838911] [2020-12-22 06:01:47,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:01:47,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:01:48,049 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 06:01:48,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074838911] [2020-12-22 06:01:48,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:01:48,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:01:48,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325874450] [2020-12-22 06:01:48,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:01:48,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:01:48,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:01:48,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:01:48,052 INFO L87 Difference]: Start difference. First operand 4771 states and 8985 transitions. Second operand 4 states. [2020-12-22 06:01:49,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:01:49,012 INFO L93 Difference]: Finished difference Result 23605 states and 44540 transitions. [2020-12-22 06:01:49,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:01:49,015 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-12-22 06:01:49,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:01:49,198 INFO L225 Difference]: With dead ends: 23605 [2020-12-22 06:01:49,198 INFO L226 Difference]: Without dead ends: 18856 [2020-12-22 06:01:49,215 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 06:01:49,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18856 states. [2020-12-22 06:01:49,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18856 to 4771. [2020-12-22 06:01:49,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4771 states. [2020-12-22 06:01:49,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4771 states to 4771 states and 8984 transitions. [2020-12-22 06:01:49,500 INFO L78 Accepts]: Start accepts. Automaton has 4771 states and 8984 transitions. Word has length 48 [2020-12-22 06:01:49,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:01:49,502 INFO L481 AbstractCegarLoop]: Abstraction has 4771 states and 8984 transitions. [2020-12-22 06:01:49,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:01:49,502 INFO L276 IsEmpty]: Start isEmpty. Operand 4771 states and 8984 transitions. [2020-12-22 06:01:49,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 06:01:49,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:01:49,505 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 06:01:49,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:01:49,506 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 06:01:49,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:01:49,506 INFO L82 PathProgramCache]: Analyzing trace with hash 792136363, now seen corresponding path program 1 times [2020-12-22 06:01:49,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:01:49,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708610513] [2020-12-22 06:01:49,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:01:49,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:01:49,616 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 06:01:49,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708610513] [2020-12-22 06:01:49,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:01:49,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:01:49,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297148275] [2020-12-22 06:01:49,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:01:49,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:01:49,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:01:49,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:01:49,619 INFO L87 Difference]: Start difference. First operand 4771 states and 8984 transitions. Second operand 4 states. [2020-12-22 06:01:50,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:01:50,291 INFO L93 Difference]: Finished difference Result 14221 states and 26817 transitions. [2020-12-22 06:01:50,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:01:50,292 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-12-22 06:01:50,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:01:50,321 INFO L225 Difference]: With dead ends: 14221 [2020-12-22 06:01:50,321 INFO L226 Difference]: Without dead ends: 9472 [2020-12-22 06:01:50,333 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 06:01:50,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9472 states. [2020-12-22 06:01:50,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9472 to 4771. [2020-12-22 06:01:50,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4771 states. [2020-12-22 06:01:50,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4771 states to 4771 states and 8978 transitions. [2020-12-22 06:01:50,718 INFO L78 Accepts]: Start accepts. Automaton has 4771 states and 8978 transitions. Word has length 49 [2020-12-22 06:01:50,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:01:50,718 INFO L481 AbstractCegarLoop]: Abstraction has 4771 states and 8978 transitions. [2020-12-22 06:01:50,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:01:50,719 INFO L276 IsEmpty]: Start isEmpty. Operand 4771 states and 8978 transitions. [2020-12-22 06:01:50,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 06:01:50,720 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:01:50,720 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 06:01:50,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:01:50,720 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 06:01:50,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:01:50,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1162555413, now seen corresponding path program 1 times [2020-12-22 06:01:50,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:01:50,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983432432] [2020-12-22 06:01:50,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:01:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:01:50,806 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 06:01:50,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983432432] [2020-12-22 06:01:50,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:01:50,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:01:50,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503528394] [2020-12-22 06:01:50,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:01:50,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:01:50,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:01:50,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:01:50,809 INFO L87 Difference]: Start difference. First operand 4771 states and 8978 transitions. Second operand 4 states. [2020-12-22 06:01:51,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:01:51,402 INFO L93 Difference]: Finished difference Result 14221 states and 26805 transitions. [2020-12-22 06:01:51,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:01:51,403 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-12-22 06:01:51,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:01:51,430 INFO L225 Difference]: With dead ends: 14221 [2020-12-22 06:01:51,431 INFO L226 Difference]: Without dead ends: 9472 [2020-12-22 06:01:51,442 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 06:01:51,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9472 states. [2020-12-22 06:01:51,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9472 to 4771. [2020-12-22 06:01:51,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4771 states. [2020-12-22 06:01:51,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4771 states to 4771 states and 8972 transitions. [2020-12-22 06:01:51,679 INFO L78 Accepts]: Start accepts. Automaton has 4771 states and 8972 transitions. Word has length 50 [2020-12-22 06:01:51,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:01:51,679 INFO L481 AbstractCegarLoop]: Abstraction has 4771 states and 8972 transitions. [2020-12-22 06:01:51,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:01:51,679 INFO L276 IsEmpty]: Start isEmpty. Operand 4771 states and 8972 transitions. [2020-12-22 06:01:51,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 06:01:51,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:01:51,681 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 06:01:51,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:01:51,681 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 06:01:51,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:01:51,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1571877690, now seen corresponding path program 1 times [2020-12-22 06:01:51,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:01:51,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250884652] [2020-12-22 06:01:51,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:01:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:01:51,787 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 06:01:51,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250884652] [2020-12-22 06:01:51,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:01:51,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:01:51,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481233273] [2020-12-22 06:01:51,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:01:51,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:01:51,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:01:51,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:01:51,790 INFO L87 Difference]: Start difference. First operand 4771 states and 8972 transitions. Second operand 4 states. [2020-12-22 06:01:52,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:01:52,538 INFO L93 Difference]: Finished difference Result 18892 states and 35621 transitions. [2020-12-22 06:01:52,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:01:52,539 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-12-22 06:01:52,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:01:52,587 INFO L225 Difference]: With dead ends: 18892 [2020-12-22 06:01:52,587 INFO L226 Difference]: Without dead ends: 14149 [2020-12-22 06:01:52,599 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 06:01:52,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14149 states. [2020-12-22 06:01:52,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14149 to 4773. [2020-12-22 06:01:52,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4773 states. [2020-12-22 06:01:52,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4773 states to 4773 states and 8973 transitions. [2020-12-22 06:01:52,907 INFO L78 Accepts]: Start accepts. Automaton has 4773 states and 8973 transitions. Word has length 51 [2020-12-22 06:01:52,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:01:52,911 INFO L481 AbstractCegarLoop]: Abstraction has 4773 states and 8973 transitions. [2020-12-22 06:01:52,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:01:52,911 INFO L276 IsEmpty]: Start isEmpty. Operand 4773 states and 8973 transitions. [2020-12-22 06:01:52,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 06:01:52,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:01:52,914 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 06:01:52,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:01:52,914 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 06:01:52,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:01:52,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1415614102, now seen corresponding path program 1 times [2020-12-22 06:01:52,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:01:52,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952685831] [2020-12-22 06:01:52,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:01:52,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:01:53,022 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 06:01:53,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952685831] [2020-12-22 06:01:53,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:01:53,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:01:53,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410995140] [2020-12-22 06:01:53,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:01:53,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:01:53,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:01:53,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:01:53,027 INFO L87 Difference]: Start difference. First operand 4773 states and 8973 transitions. Second operand 4 states. [2020-12-22 06:01:53,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:01:53,798 INFO L93 Difference]: Finished difference Result 18884 states and 35601 transitions. [2020-12-22 06:01:53,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:01:53,799 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-12-22 06:01:53,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:01:53,843 INFO L225 Difference]: With dead ends: 18884 [2020-12-22 06:01:53,844 INFO L226 Difference]: Without dead ends: 14144 [2020-12-22 06:01:53,857 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 06:01:53,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14144 states. [2020-12-22 06:01:54,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14144 to 4778. [2020-12-22 06:01:54,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4778 states. [2020-12-22 06:01:54,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4778 states to 4778 states and 8981 transitions. [2020-12-22 06:01:54,221 INFO L78 Accepts]: Start accepts. Automaton has 4778 states and 8981 transitions. Word has length 52 [2020-12-22 06:01:54,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:01:54,226 INFO L481 AbstractCegarLoop]: Abstraction has 4778 states and 8981 transitions. [2020-12-22 06:01:54,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:01:54,226 INFO L276 IsEmpty]: Start isEmpty. Operand 4778 states and 8981 transitions. [2020-12-22 06:01:54,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 06:01:54,227 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:01:54,227 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 06:01:54,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 06:01:54,228 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 06:01:54,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:01:54,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1141736049, now seen corresponding path program 1 times [2020-12-22 06:01:54,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:01:54,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270156444] [2020-12-22 06:01:54,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:01:54,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:01:54,296 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 06:01:54,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270156444] [2020-12-22 06:01:54,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:01:54,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:01:54,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339110886] [2020-12-22 06:01:54,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:01:54,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:01:54,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:01:54,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:01:54,299 INFO L87 Difference]: Start difference. First operand 4778 states and 8981 transitions. Second operand 3 states. [2020-12-22 06:01:54,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:01:54,490 INFO L93 Difference]: Finished difference Result 9513 states and 17904 transitions. [2020-12-22 06:01:54,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:01:54,490 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-12-22 06:01:54,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:01:54,503 INFO L225 Difference]: With dead ends: 9513 [2020-12-22 06:01:54,503 INFO L226 Difference]: Without dead ends: 4772 [2020-12-22 06:01:54,511 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 06:01:54,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4772 states. [2020-12-22 06:01:54,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4772 to 4772. [2020-12-22 06:01:54,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4772 states. [2020-12-22 06:01:54,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4772 states to 4772 states and 8969 transitions. [2020-12-22 06:01:54,786 INFO L78 Accepts]: Start accepts. Automaton has 4772 states and 8969 transitions. Word has length 53 [2020-12-22 06:01:54,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:01:54,786 INFO L481 AbstractCegarLoop]: Abstraction has 4772 states and 8969 transitions. [2020-12-22 06:01:54,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:01:54,787 INFO L276 IsEmpty]: Start isEmpty. Operand 4772 states and 8969 transitions. [2020-12-22 06:01:54,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 06:01:54,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:01:54,788 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 06:01:54,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:01:54,788 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 06:01:54,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:01:54,789 INFO L82 PathProgramCache]: Analyzing trace with hash -941604074, now seen corresponding path program 1 times [2020-12-22 06:01:54,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:01:54,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200593951] [2020-12-22 06:01:54,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:01:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:01:54,867 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 06:01:54,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200593951] [2020-12-22 06:01:54,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:01:54,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:01:54,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785620079] [2020-12-22 06:01:54,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:01:54,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:01:54,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:01:54,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:01:54,870 INFO L87 Difference]: Start difference. First operand 4772 states and 8969 transitions. Second operand 5 states. [2020-12-22 06:01:55,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:01:55,164 INFO L93 Difference]: Finished difference Result 9457 states and 17817 transitions. [2020-12-22 06:01:55,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:01:55,164 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 06:01:55,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:01:55,178 INFO L225 Difference]: With dead ends: 9457 [2020-12-22 06:01:55,179 INFO L226 Difference]: Without dead ends: 4759 [2020-12-22 06:01:55,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:01:55,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4759 states. [2020-12-22 06:01:55,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4759 to 4759. [2020-12-22 06:01:55,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4759 states. [2020-12-22 06:01:55,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4759 states to 4759 states and 8947 transitions. [2020-12-22 06:01:55,495 INFO L78 Accepts]: Start accepts. Automaton has 4759 states and 8947 transitions. Word has length 55 [2020-12-22 06:01:55,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:01:55,496 INFO L481 AbstractCegarLoop]: Abstraction has 4759 states and 8947 transitions. [2020-12-22 06:01:55,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:01:55,496 INFO L276 IsEmpty]: Start isEmpty. Operand 4759 states and 8947 transitions. [2020-12-22 06:01:55,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 06:01:55,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:01:55,497 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] [2020-12-22 06:01:55,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 06:01:55,498 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 06:01:55,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:01:55,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1563040938, now seen corresponding path program 1 times [2020-12-22 06:01:55,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:01:55,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594026408] [2020-12-22 06:01:55,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:01:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:01:55,586 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 06:01:55,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594026408] [2020-12-22 06:01:55,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:01:55,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:01:55,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728958188] [2020-12-22 06:01:55,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:01:55,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:01:55,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:01:55,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:01:55,589 INFO L87 Difference]: Start difference. First operand 4759 states and 8947 transitions. Second operand 5 states. [2020-12-22 06:01:55,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:01:55,916 INFO L93 Difference]: Finished difference Result 9451 states and 17806 transitions. [2020-12-22 06:01:55,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:01:55,917 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-12-22 06:01:55,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:01:55,932 INFO L225 Difference]: With dead ends: 9451 [2020-12-22 06:01:55,932 INFO L226 Difference]: Without dead ends: 4753 [2020-12-22 06:01:55,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 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 06:01:55,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4753 states. [2020-12-22 06:01:56,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4753 to 4753. [2020-12-22 06:01:56,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4753 states. [2020-12-22 06:01:56,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4753 states to 4753 states and 8938 transitions. [2020-12-22 06:01:56,309 INFO L78 Accepts]: Start accepts. Automaton has 4753 states and 8938 transitions. Word has length 58 [2020-12-22 06:01:56,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:01:56,309 INFO L481 AbstractCegarLoop]: Abstraction has 4753 states and 8938 transitions. [2020-12-22 06:01:56,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:01:56,309 INFO L276 IsEmpty]: Start isEmpty. Operand 4753 states and 8938 transitions. [2020-12-22 06:01:56,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 06:01:56,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:01:56,311 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] [2020-12-22 06:01:56,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:01:56,311 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 06:01:56,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:01:56,312 INFO L82 PathProgramCache]: Analyzing trace with hash 856485930, now seen corresponding path program 1 times [2020-12-22 06:01:56,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:01:56,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068705851] [2020-12-22 06:01:56,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:01:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:01:56,374 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 06:01:56,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068705851] [2020-12-22 06:01:56,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:01:56,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:01:56,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318647852] [2020-12-22 06:01:56,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:01:56,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:01:56,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:01:56,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:01:56,377 INFO L87 Difference]: Start difference. First operand 4753 states and 8938 transitions. Second operand 4 states. [2020-12-22 06:01:56,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:01:56,606 INFO L93 Difference]: Finished difference Result 9445 states and 17797 transitions. [2020-12-22 06:01:56,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:01:56,606 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-12-22 06:01:56,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:01:56,622 INFO L225 Difference]: With dead ends: 9445 [2020-12-22 06:01:56,622 INFO L226 Difference]: Without dead ends: 4739 [2020-12-22 06:01:56,631 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 06:01:56,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4739 states. [2020-12-22 06:01:56,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4739 to 4739. [2020-12-22 06:01:56,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4739 states. [2020-12-22 06:01:56,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4739 states to 4739 states and 8917 transitions. [2020-12-22 06:01:56,957 INFO L78 Accepts]: Start accepts. Automaton has 4739 states and 8917 transitions. Word has length 58 [2020-12-22 06:01:56,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:01:56,957 INFO L481 AbstractCegarLoop]: Abstraction has 4739 states and 8917 transitions. [2020-12-22 06:01:56,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:01:56,957 INFO L276 IsEmpty]: Start isEmpty. Operand 4739 states and 8917 transitions. [2020-12-22 06:01:56,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 06:01:56,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:01:56,959 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] [2020-12-22 06:01:56,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 06:01:56,959 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 06:01:56,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:01:56,960 INFO L82 PathProgramCache]: Analyzing trace with hash -643906339, now seen corresponding path program 1 times [2020-12-22 06:01:56,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:01:56,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738989144] [2020-12-22 06:01:56,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:01:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:01:57,036 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 06:01:57,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738989144] [2020-12-22 06:01:57,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:01:57,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:01:57,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196105107] [2020-12-22 06:01:57,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:01:57,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:01:57,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:01:57,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:01:57,038 INFO L87 Difference]: Start difference. First operand 4739 states and 8917 transitions. Second operand 6 states. [2020-12-22 06:01:57,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:01:57,376 INFO L93 Difference]: Finished difference Result 9445 states and 17792 transitions. [2020-12-22 06:01:57,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:01:57,376 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-12-22 06:01:57,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:01:57,384 INFO L225 Difference]: With dead ends: 9445 [2020-12-22 06:01:57,384 INFO L226 Difference]: Without dead ends: 4759 [2020-12-22 06:01:57,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 06:01:57,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4759 states. [2020-12-22 06:01:57,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4759 to 4739. [2020-12-22 06:01:57,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4739 states. [2020-12-22 06:01:57,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4739 states to 4739 states and 8916 transitions. [2020-12-22 06:01:57,652 INFO L78 Accepts]: Start accepts. Automaton has 4739 states and 8916 transitions. Word has length 59 [2020-12-22 06:01:57,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:01:57,653 INFO L481 AbstractCegarLoop]: Abstraction has 4739 states and 8916 transitions. [2020-12-22 06:01:57,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:01:57,653 INFO L276 IsEmpty]: Start isEmpty. Operand 4739 states and 8916 transitions. [2020-12-22 06:01:57,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 06:01:57,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:01:57,655 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] [2020-12-22 06:01:57,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:01:57,656 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 06:01:57,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:01:57,657 INFO L82 PathProgramCache]: Analyzing trace with hash -958302959, now seen corresponding path program 1 times [2020-12-22 06:01:57,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:01:57,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053468050] [2020-12-22 06:01:57,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:01:57,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:01:57,740 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 06:01:57,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053468050] [2020-12-22 06:01:57,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:01:57,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:01:57,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040593915] [2020-12-22 06:01:57,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:01:57,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:01:57,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:01:57,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:01:57,743 INFO L87 Difference]: Start difference. First operand 4739 states and 8916 transitions. Second operand 6 states. [2020-12-22 06:01:58,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:01:58,079 INFO L93 Difference]: Finished difference Result 9435 states and 17773 transitions. [2020-12-22 06:01:58,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:01:58,079 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-12-22 06:01:58,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:01:58,086 INFO L225 Difference]: With dead ends: 9435 [2020-12-22 06:01:58,086 INFO L226 Difference]: Without dead ends: 4754 [2020-12-22 06:01:58,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 06:01:58,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4754 states. [2020-12-22 06:01:58,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4754 to 4739. [2020-12-22 06:01:58,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4739 states. [2020-12-22 06:01:58,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4739 states to 4739 states and 8915 transitions. [2020-12-22 06:01:58,400 INFO L78 Accepts]: Start accepts. Automaton has 4739 states and 8915 transitions. Word has length 60 [2020-12-22 06:01:58,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:01:58,400 INFO L481 AbstractCegarLoop]: Abstraction has 4739 states and 8915 transitions. [2020-12-22 06:01:58,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:01:58,401 INFO L276 IsEmpty]: Start isEmpty. Operand 4739 states and 8915 transitions. [2020-12-22 06:01:58,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 06:01:58,403 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:01:58,403 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] [2020-12-22 06:01:58,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 06:01:58,404 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 06:01:58,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:01:58,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1619075218, now seen corresponding path program 1 times [2020-12-22 06:01:58,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:01:58,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522248225] [2020-12-22 06:01:58,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:01:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:01:58,520 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 06:01:58,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522248225] [2020-12-22 06:01:58,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:01:58,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:01:58,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920294073] [2020-12-22 06:01:58,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:01:58,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:01:58,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:01:58,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:01:58,523 INFO L87 Difference]: Start difference. First operand 4739 states and 8915 transitions. Second operand 3 states. [2020-12-22 06:01:59,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:01:59,379 INFO L93 Difference]: Finished difference Result 10971 states and 20697 transitions. [2020-12-22 06:01:59,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:01:59,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 06:01:59,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:01:59,396 INFO L225 Difference]: With dead ends: 10971 [2020-12-22 06:01:59,397 INFO L226 Difference]: Without dead ends: 8576 [2020-12-22 06:01:59,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:01:59,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8576 states. [2020-12-22 06:01:59,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8576 to 6597. [2020-12-22 06:01:59,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6597 states. [2020-12-22 06:01:59,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6597 states to 6597 states and 12433 transitions. [2020-12-22 06:01:59,848 INFO L78 Accepts]: Start accepts. Automaton has 6597 states and 12433 transitions. Word has length 61 [2020-12-22 06:01:59,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:01:59,848 INFO L481 AbstractCegarLoop]: Abstraction has 6597 states and 12433 transitions. [2020-12-22 06:01:59,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:01:59,849 INFO L276 IsEmpty]: Start isEmpty. Operand 6597 states and 12433 transitions. [2020-12-22 06:01:59,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 06:01:59,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:01:59,853 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] [2020-12-22 06:01:59,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 06:01:59,853 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 06:01:59,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:01:59,854 INFO L82 PathProgramCache]: Analyzing trace with hash -86892149, now seen corresponding path program 1 times [2020-12-22 06:01:59,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:01:59,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738043445] [2020-12-22 06:01:59,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:01:59,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:01:59,964 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 06:01:59,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738043445] [2020-12-22 06:01:59,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:01:59,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:01:59,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831669259] [2020-12-22 06:01:59,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 06:01:59,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:01:59,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 06:01:59,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:01:59,968 INFO L87 Difference]: Start difference. First operand 6597 states and 12433 transitions. Second operand 8 states. [2020-12-22 06:02:00,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:02:00,798 INFO L93 Difference]: Finished difference Result 13194 states and 24688 transitions. [2020-12-22 06:02:00,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 06:02:00,799 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 74 [2020-12-22 06:02:00,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:02:00,810 INFO L225 Difference]: With dead ends: 13194 [2020-12-22 06:02:00,810 INFO L226 Difference]: Without dead ends: 7819 [2020-12-22 06:02:00,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-12-22 06:02:00,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7819 states. [2020-12-22 06:02:01,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7819 to 5372. [2020-12-22 06:02:01,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5372 states. [2020-12-22 06:02:01,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5372 states to 5372 states and 10066 transitions. [2020-12-22 06:02:01,253 INFO L78 Accepts]: Start accepts. Automaton has 5372 states and 10066 transitions. Word has length 74 [2020-12-22 06:02:01,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:02:01,254 INFO L481 AbstractCegarLoop]: Abstraction has 5372 states and 10066 transitions. [2020-12-22 06:02:01,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 06:02:01,254 INFO L276 IsEmpty]: Start isEmpty. Operand 5372 states and 10066 transitions. [2020-12-22 06:02:01,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 06:02:01,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:02:01,257 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] [2020-12-22 06:02:01,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 06:02:01,257 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 06:02:01,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:02:01,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1319552578, now seen corresponding path program 1 times [2020-12-22 06:02:01,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:02:01,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430367749] [2020-12-22 06:02:01,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:02:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:02:01,336 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 06:02:01,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430367749] [2020-12-22 06:02:01,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:02:01,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:02:01,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222899312] [2020-12-22 06:02:01,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:02:01,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:02:01,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:02:01,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:02:01,338 INFO L87 Difference]: Start difference. First operand 5372 states and 10066 transitions. Second operand 5 states. [2020-12-22 06:02:04,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:02:04,106 INFO L93 Difference]: Finished difference Result 21579 states and 40361 transitions. [2020-12-22 06:02:04,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:02:04,107 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-12-22 06:02:04,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:02:04,131 INFO L225 Difference]: With dead ends: 21579 [2020-12-22 06:02:04,131 INFO L226 Difference]: Without dead ends: 16283 [2020-12-22 06:02:04,144 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 06:02:04,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16283 states. [2020-12-22 06:02:04,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16283 to 5386. [2020-12-22 06:02:04,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5386 states. [2020-12-22 06:02:04,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5386 states to 5386 states and 10080 transitions. [2020-12-22 06:02:04,535 INFO L78 Accepts]: Start accepts. Automaton has 5386 states and 10080 transitions. Word has length 75 [2020-12-22 06:02:04,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:02:04,535 INFO L481 AbstractCegarLoop]: Abstraction has 5386 states and 10080 transitions. [2020-12-22 06:02:04,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:02:04,535 INFO L276 IsEmpty]: Start isEmpty. Operand 5386 states and 10080 transitions. [2020-12-22 06:02:04,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 06:02:04,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:02:04,538 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] [2020-12-22 06:02:04,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 06:02:04,538 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 06:02:04,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:02:04,539 INFO L82 PathProgramCache]: Analyzing trace with hash 690188848, now seen corresponding path program 1 times [2020-12-22 06:02:04,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:02:04,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556774354] [2020-12-22 06:02:04,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:02:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:02:04,607 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 06:02:04,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556774354] [2020-12-22 06:02:04,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:02:04,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:02:04,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430334264] [2020-12-22 06:02:04,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:02:04,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:02:04,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:02:04,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:02:04,609 INFO L87 Difference]: Start difference. First operand 5386 states and 10080 transitions. Second operand 4 states. [2020-12-22 06:02:07,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:02:07,468 INFO L93 Difference]: Finished difference Result 15937 states and 29732 transitions. [2020-12-22 06:02:07,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:02:07,469 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-12-22 06:02:07,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:02:07,485 INFO L225 Difference]: With dead ends: 15937 [2020-12-22 06:02:07,485 INFO L226 Difference]: Without dead ends: 10614 [2020-12-22 06:02:07,493 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 06:02:07,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10614 states. [2020-12-22 06:02:07,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10614 to 6862. [2020-12-22 06:02:07,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6862 states. [2020-12-22 06:02:07,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6862 states to 6862 states and 12704 transitions. [2020-12-22 06:02:07,938 INFO L78 Accepts]: Start accepts. Automaton has 6862 states and 12704 transitions. Word has length 76 [2020-12-22 06:02:07,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:02:07,939 INFO L481 AbstractCegarLoop]: Abstraction has 6862 states and 12704 transitions. [2020-12-22 06:02:07,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:02:07,939 INFO L276 IsEmpty]: Start isEmpty. Operand 6862 states and 12704 transitions. [2020-12-22 06:02:07,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 06:02:07,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:02:07,941 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] [2020-12-22 06:02:07,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 06:02:07,942 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 06:02:07,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:02:07,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1667362408, now seen corresponding path program 1 times [2020-12-22 06:02:07,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:02:07,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388189222] [2020-12-22 06:02:07,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:02:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:02:08,017 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 06:02:08,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388189222] [2020-12-22 06:02:08,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:02:08,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:02:08,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537665989] [2020-12-22 06:02:08,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:02:08,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:02:08,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:02:08,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:02:08,019 INFO L87 Difference]: Start difference. First operand 6862 states and 12704 transitions. Second operand 5 states. [2020-12-22 06:02:10,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:02:10,341 INFO L93 Difference]: Finished difference Result 45524 states and 84643 transitions. [2020-12-22 06:02:10,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:02:10,341 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-12-22 06:02:10,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:02:10,389 INFO L225 Difference]: With dead ends: 45524 [2020-12-22 06:02:10,390 INFO L226 Difference]: Without dead ends: 38734 [2020-12-22 06:02:10,399 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 06:02:10,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38734 states. [2020-12-22 06:02:11,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38734 to 10924. [2020-12-22 06:02:11,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10924 states. [2020-12-22 06:02:11,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10924 states to 10924 states and 20258 transitions. [2020-12-22 06:02:11,032 INFO L78 Accepts]: Start accepts. Automaton has 10924 states and 20258 transitions. Word has length 78 [2020-12-22 06:02:11,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:02:11,032 INFO L481 AbstractCegarLoop]: Abstraction has 10924 states and 20258 transitions. [2020-12-22 06:02:11,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:02:11,033 INFO L276 IsEmpty]: Start isEmpty. Operand 10924 states and 20258 transitions. [2020-12-22 06:02:11,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 06:02:11,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:02:11,035 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] [2020-12-22 06:02:11,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 06:02:11,035 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 06:02:11,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:02:11,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1801375914, now seen corresponding path program 1 times [2020-12-22 06:02:11,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:02:11,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658325043] [2020-12-22 06:02:11,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:02:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:02:11,103 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 06:02:11,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658325043] [2020-12-22 06:02:11,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:02:11,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:02:11,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623321456] [2020-12-22 06:02:11,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:02:11,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:02:11,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:02:11,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:02:11,105 INFO L87 Difference]: Start difference. First operand 10924 states and 20258 transitions. Second operand 4 states. [2020-12-22 06:02:12,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:02:12,190 INFO L93 Difference]: Finished difference Result 22487 states and 41619 transitions. [2020-12-22 06:02:12,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:02:12,191 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-12-22 06:02:12,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:02:12,211 INFO L225 Difference]: With dead ends: 22487 [2020-12-22 06:02:12,211 INFO L226 Difference]: Without dead ends: 15941 [2020-12-22 06:02:12,224 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 06:02:12,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15941 states. [2020-12-22 06:02:12,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15941 to 10938. [2020-12-22 06:02:12,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10938 states. [2020-12-22 06:02:12,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10938 states to 10938 states and 20266 transitions. [2020-12-22 06:02:12,713 INFO L78 Accepts]: Start accepts. Automaton has 10938 states and 20266 transitions. Word has length 78 [2020-12-22 06:02:12,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:02:12,714 INFO L481 AbstractCegarLoop]: Abstraction has 10938 states and 20266 transitions. [2020-12-22 06:02:12,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:02:12,714 INFO L276 IsEmpty]: Start isEmpty. Operand 10938 states and 20266 transitions. [2020-12-22 06:02:12,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 06:02:12,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:02:12,716 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] [2020-12-22 06:02:12,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 06:02:12,716 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 06:02:12,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:02:12,717 INFO L82 PathProgramCache]: Analyzing trace with hash -817034699, now seen corresponding path program 1 times [2020-12-22 06:02:12,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:02:12,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008697351] [2020-12-22 06:02:12,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:02:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:02:12,858 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 06:02:12,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008697351] [2020-12-22 06:02:12,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:02:12,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:02:12,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524433721] [2020-12-22 06:02:12,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:02:12,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:02:12,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:02:12,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:02:12,860 INFO L87 Difference]: Start difference. First operand 10938 states and 20266 transitions. Second operand 4 states. [2020-12-22 06:02:15,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:02:15,052 INFO L93 Difference]: Finished difference Result 29416 states and 54510 transitions. [2020-12-22 06:02:15,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:02:15,053 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-12-22 06:02:15,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:02:15,095 INFO L225 Difference]: With dead ends: 29416 [2020-12-22 06:02:15,095 INFO L226 Difference]: Without dead ends: 22806 [2020-12-22 06:02:15,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:02:15,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22806 states. [2020-12-22 06:02:15,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22806 to 17383. [2020-12-22 06:02:15,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17383 states. [2020-12-22 06:02:16,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17383 states to 17383 states and 32205 transitions. [2020-12-22 06:02:16,014 INFO L78 Accepts]: Start accepts. Automaton has 17383 states and 32205 transitions. Word has length 84 [2020-12-22 06:02:16,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:02:16,014 INFO L481 AbstractCegarLoop]: Abstraction has 17383 states and 32205 transitions. [2020-12-22 06:02:16,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:02:16,015 INFO L276 IsEmpty]: Start isEmpty. Operand 17383 states and 32205 transitions. [2020-12-22 06:02:16,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 06:02:16,018 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:02:16,018 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] [2020-12-22 06:02:16,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 06:02:16,018 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 06:02:16,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:02:16,019 INFO L82 PathProgramCache]: Analyzing trace with hash -394332873, now seen corresponding path program 1 times [2020-12-22 06:02:16,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:02:16,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460292864] [2020-12-22 06:02:16,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:02:16,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:02:16,095 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 06:02:16,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460292864] [2020-12-22 06:02:16,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:02:16,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:02:16,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438725214] [2020-12-22 06:02:16,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:02:16,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:02:16,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:02:16,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:02:16,098 INFO L87 Difference]: Start difference. First operand 17383 states and 32205 transitions. Second operand 3 states. [2020-12-22 06:02:17,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:02:17,259 INFO L93 Difference]: Finished difference Result 32780 states and 60732 transitions. [2020-12-22 06:02:17,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:02:17,260 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-12-22 06:02:17,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:02:17,281 INFO L225 Difference]: With dead ends: 32780 [2020-12-22 06:02:17,281 INFO L226 Difference]: Without dead ends: 17341 [2020-12-22 06:02:17,298 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 06:02:17,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17341 states. [2020-12-22 06:02:18,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17341 to 17341. [2020-12-22 06:02:18,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17341 states. [2020-12-22 06:02:18,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17341 states to 17341 states and 32123 transitions. [2020-12-22 06:02:18,197 INFO L78 Accepts]: Start accepts. Automaton has 17341 states and 32123 transitions. Word has length 84 [2020-12-22 06:02:18,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:02:18,198 INFO L481 AbstractCegarLoop]: Abstraction has 17341 states and 32123 transitions. [2020-12-22 06:02:18,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:02:18,198 INFO L276 IsEmpty]: Start isEmpty. Operand 17341 states and 32123 transitions. [2020-12-22 06:02:18,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 06:02:18,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:02:18,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:02:18,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 06:02:18,201 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 06:02:18,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:02:18,201 INFO L82 PathProgramCache]: Analyzing trace with hash -50310469, now seen corresponding path program 1 times [2020-12-22 06:02:18,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:02:18,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036555756] [2020-12-22 06:02:18,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:02:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:02:18,277 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 06:02:18,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036555756] [2020-12-22 06:02:18,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:02:18,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:02:18,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257554397] [2020-12-22 06:02:18,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:02:18,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:02:18,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:02:18,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:02:18,279 INFO L87 Difference]: Start difference. First operand 17341 states and 32123 transitions. Second operand 5 states. [2020-12-22 06:02:20,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:02:20,596 INFO L93 Difference]: Finished difference Result 57988 states and 107500 transitions. [2020-12-22 06:02:20,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:02:20,597 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 86 [2020-12-22 06:02:20,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:02:20,663 INFO L225 Difference]: With dead ends: 57988 [2020-12-22 06:02:20,664 INFO L226 Difference]: Without dead ends: 45075 [2020-12-22 06:02:20,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 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 06:02:20,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45075 states. [2020-12-22 06:02:21,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45075 to 17341. [2020-12-22 06:02:21,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17341 states. [2020-12-22 06:02:21,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17341 states to 17341 states and 32103 transitions. [2020-12-22 06:02:21,655 INFO L78 Accepts]: Start accepts. Automaton has 17341 states and 32103 transitions. Word has length 86 [2020-12-22 06:02:21,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:02:21,655 INFO L481 AbstractCegarLoop]: Abstraction has 17341 states and 32103 transitions. [2020-12-22 06:02:21,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:02:21,656 INFO L276 IsEmpty]: Start isEmpty. Operand 17341 states and 32103 transitions. [2020-12-22 06:02:21,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 06:02:21,659 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:02:21,659 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] [2020-12-22 06:02:21,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 06:02:21,659 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 06:02:21,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:02:21,660 INFO L82 PathProgramCache]: Analyzing trace with hash -365618119, now seen corresponding path program 1 times [2020-12-22 06:02:21,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:02:21,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342718715] [2020-12-22 06:02:21,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:02:21,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:02:21,763 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 06:02:21,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342718715] [2020-12-22 06:02:21,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:02:21,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:02:21,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893772632] [2020-12-22 06:02:21,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:02:21,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:02:21,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:02:21,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:02:21,765 INFO L87 Difference]: Start difference. First operand 17341 states and 32103 transitions. Second operand 5 states. [2020-12-22 06:02:23,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:02:23,412 INFO L93 Difference]: Finished difference Result 28464 states and 52867 transitions. [2020-12-22 06:02:23,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:02:23,413 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 86 [2020-12-22 06:02:23,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:02:23,447 INFO L225 Difference]: With dead ends: 28464 [2020-12-22 06:02:23,447 INFO L226 Difference]: Without dead ends: 28451 [2020-12-22 06:02:23,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:02:23,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28451 states. [2020-12-22 06:02:24,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28451 to 17356. [2020-12-22 06:02:24,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17356 states. [2020-12-22 06:02:24,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17356 states to 17356 states and 32118 transitions. [2020-12-22 06:02:24,402 INFO L78 Accepts]: Start accepts. Automaton has 17356 states and 32118 transitions. Word has length 86 [2020-12-22 06:02:24,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:02:24,402 INFO L481 AbstractCegarLoop]: Abstraction has 17356 states and 32118 transitions. [2020-12-22 06:02:24,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:02:24,402 INFO L276 IsEmpty]: Start isEmpty. Operand 17356 states and 32118 transitions. [2020-12-22 06:02:24,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 06:02:24,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:02:24,406 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] [2020-12-22 06:02:24,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 06:02:24,406 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 06:02:24,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:02:24,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1658752162, now seen corresponding path program 1 times [2020-12-22 06:02:24,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:02:24,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228106848] [2020-12-22 06:02:24,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:02:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:02:24,503 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 06:02:24,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228106848] [2020-12-22 06:02:24,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:02:24,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:02:24,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817373399] [2020-12-22 06:02:24,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:02:24,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:02:24,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:02:24,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:02:24,505 INFO L87 Difference]: Start difference. First operand 17356 states and 32118 transitions. Second operand 5 states. [2020-12-22 06:02:26,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:02:26,197 INFO L93 Difference]: Finished difference Result 29897 states and 55222 transitions. [2020-12-22 06:02:26,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:02:26,197 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 88 [2020-12-22 06:02:26,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:02:26,234 INFO L225 Difference]: With dead ends: 29897 [2020-12-22 06:02:26,234 INFO L226 Difference]: Without dead ends: 29884 [2020-12-22 06:02:26,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 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 06:02:26,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29884 states. [2020-12-22 06:02:27,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29884 to 17616. [2020-12-22 06:02:27,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17616 states. [2020-12-22 06:02:27,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17616 states to 17616 states and 32509 transitions. [2020-12-22 06:02:27,367 INFO L78 Accepts]: Start accepts. Automaton has 17616 states and 32509 transitions. Word has length 88 [2020-12-22 06:02:27,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:02:27,368 INFO L481 AbstractCegarLoop]: Abstraction has 17616 states and 32509 transitions. [2020-12-22 06:02:27,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:02:27,368 INFO L276 IsEmpty]: Start isEmpty. Operand 17616 states and 32509 transitions. [2020-12-22 06:02:27,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 06:02:27,372 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:02:27,373 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] [2020-12-22 06:02:27,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 06:02:27,373 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 06:02:27,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:02:27,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1528479508, now seen corresponding path program 1 times [2020-12-22 06:02:27,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:02:27,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383721700] [2020-12-22 06:02:27,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:02:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:02:27,472 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 06:02:27,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383721700] [2020-12-22 06:02:27,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:02:27,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:02:27,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033645803] [2020-12-22 06:02:27,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:02:27,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:02:27,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:02:27,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:02:27,474 INFO L87 Difference]: Start difference. First operand 17616 states and 32509 transitions. Second operand 5 states. [2020-12-22 06:02:30,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:02:30,011 INFO L93 Difference]: Finished difference Result 44775 states and 82474 transitions. [2020-12-22 06:02:30,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:02:30,011 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 95 [2020-12-22 06:02:30,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:02:30,051 INFO L225 Difference]: With dead ends: 44775 [2020-12-22 06:02:30,051 INFO L226 Difference]: Without dead ends: 29203 [2020-12-22 06:02:30,070 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 06:02:30,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29203 states. [2020-12-22 06:02:31,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29203 to 17616. [2020-12-22 06:02:31,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17616 states. [2020-12-22 06:02:31,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17616 states to 17616 states and 32494 transitions. [2020-12-22 06:02:31,218 INFO L78 Accepts]: Start accepts. Automaton has 17616 states and 32494 transitions. Word has length 95 [2020-12-22 06:02:31,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:02:31,219 INFO L481 AbstractCegarLoop]: Abstraction has 17616 states and 32494 transitions. [2020-12-22 06:02:31,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:02:31,219 INFO L276 IsEmpty]: Start isEmpty. Operand 17616 states and 32494 transitions. [2020-12-22 06:02:31,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 06:02:31,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:02:31,223 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 06:02:31,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 06:02:31,224 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 06:02:31,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:02:31,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1418694100, now seen corresponding path program 1 times [2020-12-22 06:02:31,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:02:31,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538635961] [2020-12-22 06:02:31,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:02:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:02:31,303 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 06:02:31,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538635961] [2020-12-22 06:02:31,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:02:31,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:02:31,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247142263] [2020-12-22 06:02:31,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:02:31,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:02:31,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:02:31,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:02:31,306 INFO L87 Difference]: Start difference. First operand 17616 states and 32494 transitions. Second operand 5 states. [2020-12-22 06:02:34,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:02:34,498 INFO L93 Difference]: Finished difference Result 44131 states and 81474 transitions. [2020-12-22 06:02:34,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:02:34,499 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2020-12-22 06:02:34,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:02:34,532 INFO L225 Difference]: With dead ends: 44131 [2020-12-22 06:02:34,532 INFO L226 Difference]: Without dead ends: 28388 [2020-12-22 06:02:34,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:02:34,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28388 states. [2020-12-22 06:02:35,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28388 to 17616. [2020-12-22 06:02:35,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17616 states. [2020-12-22 06:02:35,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17616 states to 17616 states and 32194 transitions. [2020-12-22 06:02:35,511 INFO L78 Accepts]: Start accepts. Automaton has 17616 states and 32194 transitions. Word has length 99 [2020-12-22 06:02:35,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:02:35,511 INFO L481 AbstractCegarLoop]: Abstraction has 17616 states and 32194 transitions. [2020-12-22 06:02:35,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:02:35,511 INFO L276 IsEmpty]: Start isEmpty. Operand 17616 states and 32194 transitions. [2020-12-22 06:02:35,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 06:02:35,516 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:02:35,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:02:35,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 06:02:35,516 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:02:35,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:02:35,517 INFO L82 PathProgramCache]: Analyzing trace with hash 167765381, now seen corresponding path program 1 times [2020-12-22 06:02:35,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:02:35,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752366680] [2020-12-22 06:02:35,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:02:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:02:35,663 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 06:02:35,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752366680] [2020-12-22 06:02:35,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:02:35,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:02:35,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341491559] [2020-12-22 06:02:35,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:02:35,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:02:35,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:02:35,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:02:35,665 INFO L87 Difference]: Start difference. First operand 17616 states and 32194 transitions. Second operand 7 states. [2020-12-22 06:02:37,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:02:37,503 INFO L93 Difference]: Finished difference Result 29908 states and 54761 transitions. [2020-12-22 06:02:37,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 06:02:37,504 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 100 [2020-12-22 06:02:37,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:02:37,547 INFO L225 Difference]: With dead ends: 29908 [2020-12-22 06:02:37,547 INFO L226 Difference]: Without dead ends: 29895 [2020-12-22 06:02:37,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-12-22 06:02:37,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29895 states. [2020-12-22 06:02:38,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29895 to 17646. [2020-12-22 06:02:38,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17646 states. [2020-12-22 06:02:38,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17646 states to 17646 states and 32219 transitions. [2020-12-22 06:02:38,770 INFO L78 Accepts]: Start accepts. Automaton has 17646 states and 32219 transitions. Word has length 100 [2020-12-22 06:02:38,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:02:38,770 INFO L481 AbstractCegarLoop]: Abstraction has 17646 states and 32219 transitions. [2020-12-22 06:02:38,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:02:38,770 INFO L276 IsEmpty]: Start isEmpty. Operand 17646 states and 32219 transitions. [2020-12-22 06:02:38,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 06:02:38,777 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:02:38,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:02:38,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 06:02:38,778 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:02:38,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:02:38,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1326290871, now seen corresponding path program 1 times [2020-12-22 06:02:38,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:02:38,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096769443] [2020-12-22 06:02:38,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:02:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:02:38,891 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 06:02:38,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096769443] [2020-12-22 06:02:38,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:02:38,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:02:38,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990930608] [2020-12-22 06:02:38,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:02:38,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:02:38,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:02:38,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:02:38,893 INFO L87 Difference]: Start difference. First operand 17646 states and 32219 transitions. Second operand 7 states. [2020-12-22 06:02:45,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:02:45,475 INFO L93 Difference]: Finished difference Result 105497 states and 193873 transitions. [2020-12-22 06:02:45,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 06:02:45,476 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 116 [2020-12-22 06:02:45,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:02:45,591 INFO L225 Difference]: With dead ends: 105497 [2020-12-22 06:02:45,592 INFO L226 Difference]: Without dead ends: 89895 [2020-12-22 06:02:45,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-12-22 06:02:45,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89895 states. [2020-12-22 06:02:48,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89895 to 35266. [2020-12-22 06:02:48,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35266 states. [2020-12-22 06:02:48,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35266 states to 35266 states and 64404 transitions. [2020-12-22 06:02:48,454 INFO L78 Accepts]: Start accepts. Automaton has 35266 states and 64404 transitions. Word has length 116 [2020-12-22 06:02:48,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:02:48,455 INFO L481 AbstractCegarLoop]: Abstraction has 35266 states and 64404 transitions. [2020-12-22 06:02:48,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:02:48,455 INFO L276 IsEmpty]: Start isEmpty. Operand 35266 states and 64404 transitions. [2020-12-22 06:02:48,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 06:02:48,467 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:02:48,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:02:48,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 06:02:48,468 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:02:48,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:02:48,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1691760195, now seen corresponding path program 1 times [2020-12-22 06:02:48,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:02:48,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853331144] [2020-12-22 06:02:48,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:02:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:02:48,554 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 06:02:48,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853331144] [2020-12-22 06:02:48,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:02:48,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:02:48,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315688915] [2020-12-22 06:02:48,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:02:48,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:02:48,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:02:48,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:02:48,557 INFO L87 Difference]: Start difference. First operand 35266 states and 64404 transitions. Second operand 3 states. [2020-12-22 06:02:53,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:02:53,124 INFO L93 Difference]: Finished difference Result 88696 states and 162082 transitions. [2020-12-22 06:02:53,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:02:53,124 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 117 [2020-12-22 06:02:53,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:02:53,207 INFO L225 Difference]: With dead ends: 88696 [2020-12-22 06:02:53,207 INFO L226 Difference]: Without dead ends: 57137 [2020-12-22 06:02:53,232 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 06:02:53,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57137 states. [2020-12-22 06:02:55,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57137 to 34516. [2020-12-22 06:02:55,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34516 states. [2020-12-22 06:02:55,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34516 states to 34516 states and 62844 transitions. [2020-12-22 06:02:55,877 INFO L78 Accepts]: Start accepts. Automaton has 34516 states and 62844 transitions. Word has length 117 [2020-12-22 06:02:55,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:02:55,877 INFO L481 AbstractCegarLoop]: Abstraction has 34516 states and 62844 transitions. [2020-12-22 06:02:55,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:02:55,877 INFO L276 IsEmpty]: Start isEmpty. Operand 34516 states and 62844 transitions. [2020-12-22 06:02:55,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 06:02:55,886 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:02:55,886 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:02:55,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 06:02:55,887 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:02:55,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:02:55,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1710797889, now seen corresponding path program 1 times [2020-12-22 06:02:55,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:02:55,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040651552] [2020-12-22 06:02:55,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:02:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:02:56,043 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 06:02:56,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040651552] [2020-12-22 06:02:56,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:02:56,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:02:56,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863393515] [2020-12-22 06:02:56,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:02:56,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:02:56,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:02:56,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:02:56,046 INFO L87 Difference]: Start difference. First operand 34516 states and 62844 transitions. Second operand 5 states. [2020-12-22 06:02:58,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:02:58,420 INFO L93 Difference]: Finished difference Result 51124 states and 93104 transitions. [2020-12-22 06:02:58,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:02:58,420 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2020-12-22 06:02:58,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:02:58,458 INFO L225 Difference]: With dead ends: 51124 [2020-12-22 06:02:58,459 INFO L226 Difference]: Without dead ends: 33733 [2020-12-22 06:02:58,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 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 06:02:58,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33733 states. [2020-12-22 06:03:00,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33733 to 33733. [2020-12-22 06:03:00,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33733 states. [2020-12-22 06:03:00,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33733 states to 33733 states and 61445 transitions. [2020-12-22 06:03:00,765 INFO L78 Accepts]: Start accepts. Automaton has 33733 states and 61445 transitions. Word has length 117 [2020-12-22 06:03:00,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:03:00,765 INFO L481 AbstractCegarLoop]: Abstraction has 33733 states and 61445 transitions. [2020-12-22 06:03:00,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:03:00,765 INFO L276 IsEmpty]: Start isEmpty. Operand 33733 states and 61445 transitions. [2020-12-22 06:03:00,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 06:03:00,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:03:00,778 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] [2020-12-22 06:03:00,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-12-22 06:03:00,778 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:03:00,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:03:00,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1873540204, now seen corresponding path program 1 times [2020-12-22 06:03:00,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:03:00,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871734735] [2020-12-22 06:03:00,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:03:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:03:00,871 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 06:03:00,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871734735] [2020-12-22 06:03:00,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:03:00,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:03:00,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635157890] [2020-12-22 06:03:00,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:03:00,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:03:00,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:03:00,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:03:00,874 INFO L87 Difference]: Start difference. First operand 33733 states and 61445 transitions. Second operand 6 states. [2020-12-22 06:03:09,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:03:09,980 INFO L93 Difference]: Finished difference Result 109720 states and 200992 transitions. [2020-12-22 06:03:09,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 06:03:09,980 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 133 [2020-12-22 06:03:09,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:03:10,084 INFO L225 Difference]: With dead ends: 109720 [2020-12-22 06:03:10,084 INFO L226 Difference]: Without dead ends: 78977 [2020-12-22 06:03:10,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-12-22 06:03:10,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78977 states. [2020-12-22 06:03:13,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78977 to 51489. [2020-12-22 06:03:13,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51489 states. [2020-12-22 06:03:13,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51489 states to 51489 states and 94009 transitions. [2020-12-22 06:03:13,884 INFO L78 Accepts]: Start accepts. Automaton has 51489 states and 94009 transitions. Word has length 133 [2020-12-22 06:03:13,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:03:13,884 INFO L481 AbstractCegarLoop]: Abstraction has 51489 states and 94009 transitions. [2020-12-22 06:03:13,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:03:13,884 INFO L276 IsEmpty]: Start isEmpty. Operand 51489 states and 94009 transitions. [2020-12-22 06:03:13,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 06:03:13,899 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:03:13,899 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] [2020-12-22 06:03:13,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-12-22 06:03:13,899 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:03:13,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:03:13,900 INFO L82 PathProgramCache]: Analyzing trace with hash -956201449, now seen corresponding path program 1 times [2020-12-22 06:03:13,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:03:13,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735204672] [2020-12-22 06:03:13,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:03:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:03:13,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 06:03:13,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735204672] [2020-12-22 06:03:13,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:03:13,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:03:13,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619720869] [2020-12-22 06:03:13,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:03:13,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:03:13,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:03:13,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:03:13,991 INFO L87 Difference]: Start difference. First operand 51489 states and 94009 transitions. Second operand 5 states. [2020-12-22 06:03:20,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:03:20,896 INFO L93 Difference]: Finished difference Result 146328 states and 267126 transitions. [2020-12-22 06:03:20,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 06:03:20,897 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2020-12-22 06:03:20,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:03:21,087 INFO L225 Difference]: With dead ends: 146328 [2020-12-22 06:03:21,087 INFO L226 Difference]: Without dead ends: 102855 [2020-12-22 06:03:21,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 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 06:03:21,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102855 states. [2020-12-22 06:03:28,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102855 to 102855. [2020-12-22 06:03:28,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102855 states. [2020-12-22 06:03:28,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102855 states to 102855 states and 187829 transitions. [2020-12-22 06:03:28,524 INFO L78 Accepts]: Start accepts. Automaton has 102855 states and 187829 transitions. Word has length 134 [2020-12-22 06:03:28,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:03:28,525 INFO L481 AbstractCegarLoop]: Abstraction has 102855 states and 187829 transitions. [2020-12-22 06:03:28,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:03:28,525 INFO L276 IsEmpty]: Start isEmpty. Operand 102855 states and 187829 transitions. [2020-12-22 06:03:28,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 06:03:28,562 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:03:28,562 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] [2020-12-22 06:03:28,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-12-22 06:03:28,562 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:03:28,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:03:28,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1670241759, now seen corresponding path program 1 times [2020-12-22 06:03:28,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:03:28,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264410185] [2020-12-22 06:03:28,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:03:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:03:28,692 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 06:03:28,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264410185] [2020-12-22 06:03:28,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:03:28,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:03:28,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075414084] [2020-12-22 06:03:28,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:03:28,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:03:28,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:03:28,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:03:28,694 INFO L87 Difference]: Start difference. First operand 102855 states and 187829 transitions. Second operand 6 states. [2020-12-22 06:03:45,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:03:45,920 INFO L93 Difference]: Finished difference Result 290815 states and 532007 transitions. [2020-12-22 06:03:45,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 06:03:45,921 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2020-12-22 06:03:45,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:03:46,493 INFO L225 Difference]: With dead ends: 290815 [2020-12-22 06:03:46,494 INFO L226 Difference]: Without dead ends: 193948 [2020-12-22 06:03:46,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-12-22 06:03:46,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193948 states. [2020-12-22 06:03:56,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193948 to 138339. [2020-12-22 06:03:56,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138339 states. [2020-12-22 06:03:56,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138339 states to 138339 states and 252829 transitions. [2020-12-22 06:03:56,609 INFO L78 Accepts]: Start accepts. Automaton has 138339 states and 252829 transitions. Word has length 134 [2020-12-22 06:03:56,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:03:56,609 INFO L481 AbstractCegarLoop]: Abstraction has 138339 states and 252829 transitions. [2020-12-22 06:03:56,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:03:56,609 INFO L276 IsEmpty]: Start isEmpty. Operand 138339 states and 252829 transitions. [2020-12-22 06:03:56,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 06:03:56,636 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:03:56,637 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] [2020-12-22 06:03:56,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-12-22 06:03:56,637 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:03:56,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:03:56,637 INFO L82 PathProgramCache]: Analyzing trace with hash 562198963, now seen corresponding path program 1 times [2020-12-22 06:03:56,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:03:56,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159518127] [2020-12-22 06:03:56,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:03:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:03:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 06:03:57,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159518127] [2020-12-22 06:03:57,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:03:57,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:03:57,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799387305] [2020-12-22 06:03:57,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:03:57,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:03:57,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:03:57,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:03:57,037 INFO L87 Difference]: Start difference. First operand 138339 states and 252829 transitions. Second operand 6 states.