/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/systemc/kundu.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:05:16,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:05:16,398 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:05:16,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:05:16,454 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:05:16,457 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:05:16,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:05:16,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:05:16,473 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:05:16,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:05:16,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:05:16,482 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:05:16,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:05:16,485 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:05:16,488 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:05:16,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:05:16,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:05:16,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:05:16,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:05:16,511 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:05:16,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:05:16,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:05:16,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:05:16,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:05:16,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:05:16,538 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:05:16,540 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:05:16,542 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:05:16,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:05:16,544 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:05:16,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:05:16,545 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:05:16,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:05:16,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:05:16,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:05:16,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:05:16,549 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:05:16,609 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:05:16,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:05:16,614 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:05:16,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:05:16,615 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:05:16,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:05:16,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:05:16,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:05:16,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:05:16,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:05:16,617 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:05:16,618 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:05:16,618 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:05:16,618 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:05:16,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:05:16,618 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:05:16,619 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:05:16,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:05:16,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:05:16,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:05:16,620 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:05:16,620 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:05:16,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:05:16,620 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:05:16,621 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:05:16,621 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:05:17,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:05:17,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:05:17,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:05:17,149 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:05:17,150 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:05:17,151 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/kundu.cil.c [2020-12-22 07:05:17,267 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1dee3de5/f6a77f169796435b87f04b97bc800f2d/FLAG9b33569f9 [2020-12-22 07:05:18,034 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:05:18,035 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/kundu.cil.c [2020-12-22 07:05:18,051 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1dee3de5/f6a77f169796435b87f04b97bc800f2d/FLAG9b33569f9 [2020-12-22 07:05:18,355 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1dee3de5/f6a77f169796435b87f04b97bc800f2d [2020-12-22 07:05:18,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:05:18,362 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:05:18,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:05:18,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:05:18,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:05:18,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:05:18" (1/1) ... [2020-12-22 07:05:18,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31ff0d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:18, skipping insertion in model container [2020-12-22 07:05:18,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:05:18" (1/1) ... [2020-12-22 07:05:18,383 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:05:18,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:05:18,586 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/systemc/kundu.cil.c[330,343] [2020-12-22 07:05:18,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:05:18,676 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:05:18,691 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/systemc/kundu.cil.c[330,343] [2020-12-22 07:05:18,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:05:18,757 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:05:18,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:18 WrapperNode [2020-12-22 07:05:18,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:05:18,759 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:05:18,760 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:05:18,760 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:05:18,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:18" (1/1) ... [2020-12-22 07:05:18,781 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:18" (1/1) ... [2020-12-22 07:05:18,824 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:05:18,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:05:18,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:05:18,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:05:18,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:18" (1/1) ... [2020-12-22 07:05:18,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:18" (1/1) ... [2020-12-22 07:05:18,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:18" (1/1) ... [2020-12-22 07:05:18,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:18" (1/1) ... [2020-12-22 07:05:18,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:18" (1/1) ... [2020-12-22 07:05:18,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:18" (1/1) ... [2020-12-22 07:05:18,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:18" (1/1) ... [2020-12-22 07:05:18,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:05:18,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:05:18,878 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:05:18,878 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:05:18,879 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:18" (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 07:05:19,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:05:19,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:05:19,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:05:19,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:05:20,021 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:05:20,022 INFO L299 CfgBuilder]: Removed 95 assume(true) statements. [2020-12-22 07:05:20,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:05:20 BoogieIcfgContainer [2020-12-22 07:05:20,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:05:20,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:05:20,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:05:20,032 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:05:20,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:05:18" (1/3) ... [2020-12-22 07:05:20,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dcdea87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:05:20, skipping insertion in model container [2020-12-22 07:05:20,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:18" (2/3) ... [2020-12-22 07:05:20,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dcdea87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:05:20, skipping insertion in model container [2020-12-22 07:05:20,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:05:20" (3/3) ... [2020-12-22 07:05:20,040 INFO L111 eAbstractionObserver]: Analyzing ICFG kundu.cil.c [2020-12-22 07:05:20,048 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:05:20,054 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-12-22 07:05:20,074 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-22 07:05:20,105 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:05:20,105 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:05:20,105 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:05:20,106 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:05:20,106 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:05:20,106 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:05:20,106 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:05:20,106 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:05:20,129 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states. [2020-12-22 07:05:20,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 07:05:20,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:20,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:20,143 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:20,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:20,152 INFO L82 PathProgramCache]: Analyzing trace with hash 805260304, now seen corresponding path program 1 times [2020-12-22 07:05:20,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:20,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448433703] [2020-12-22 07:05:20,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:20,371 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 07:05:20,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448433703] [2020-12-22 07:05:20,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:20,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:05:20,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560852453] [2020-12-22 07:05:20,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:05:20,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:20,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:05:20,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:05:20,398 INFO L87 Difference]: Start difference. First operand 181 states. Second operand 3 states. [2020-12-22 07:05:20,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:20,464 INFO L93 Difference]: Finished difference Result 356 states and 544 transitions. [2020-12-22 07:05:20,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:05:20,466 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-12-22 07:05:20,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:20,481 INFO L225 Difference]: With dead ends: 356 [2020-12-22 07:05:20,481 INFO L226 Difference]: Without dead ends: 176 [2020-12-22 07:05:20,486 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 07:05:20,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-22 07:05:20,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2020-12-22 07:05:20,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-12-22 07:05:20,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 259 transitions. [2020-12-22 07:05:20,583 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 259 transitions. Word has length 40 [2020-12-22 07:05:20,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:20,584 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 259 transitions. [2020-12-22 07:05:20,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:05:20,584 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 259 transitions. [2020-12-22 07:05:20,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 07:05:20,586 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:20,586 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] [2020-12-22 07:05:20,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:05:20,587 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:20,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:20,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1199627090, now seen corresponding path program 1 times [2020-12-22 07:05:20,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:20,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960412164] [2020-12-22 07:05:20,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:20,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:20,670 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 07:05:20,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960412164] [2020-12-22 07:05:20,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:20,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:05:20,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077622977] [2020-12-22 07:05:20,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:05:20,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:20,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:05:20,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:05:20,674 INFO L87 Difference]: Start difference. First operand 176 states and 259 transitions. Second operand 5 states. [2020-12-22 07:05:20,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:20,952 INFO L93 Difference]: Finished difference Result 641 states and 944 transitions. [2020-12-22 07:05:20,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:05:20,953 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-12-22 07:05:20,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:20,959 INFO L225 Difference]: With dead ends: 641 [2020-12-22 07:05:20,960 INFO L226 Difference]: Without dead ends: 478 [2020-12-22 07:05:20,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 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 07:05:20,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-12-22 07:05:21,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 188. [2020-12-22 07:05:21,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-22 07:05:21,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 271 transitions. [2020-12-22 07:05:21,008 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 271 transitions. Word has length 40 [2020-12-22 07:05:21,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:21,009 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 271 transitions. [2020-12-22 07:05:21,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:05:21,009 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 271 transitions. [2020-12-22 07:05:21,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 07:05:21,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:21,011 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] [2020-12-22 07:05:21,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:05:21,012 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:21,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:21,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1709136812, now seen corresponding path program 1 times [2020-12-22 07:05:21,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:21,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319317149] [2020-12-22 07:05:21,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:21,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:21,109 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 07:05:21,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319317149] [2020-12-22 07:05:21,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:21,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:05:21,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590150312] [2020-12-22 07:05:21,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:05:21,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:21,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:05:21,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:05:21,113 INFO L87 Difference]: Start difference. First operand 188 states and 271 transitions. Second operand 4 states. [2020-12-22 07:05:21,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:21,338 INFO L93 Difference]: Finished difference Result 657 states and 945 transitions. [2020-12-22 07:05:21,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:05:21,339 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-12-22 07:05:21,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:21,348 INFO L225 Difference]: With dead ends: 657 [2020-12-22 07:05:21,348 INFO L226 Difference]: Without dead ends: 477 [2020-12-22 07:05:21,355 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 07:05:21,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2020-12-22 07:05:21,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 421. [2020-12-22 07:05:21,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-12-22 07:05:21,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 609 transitions. [2020-12-22 07:05:21,441 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 609 transitions. Word has length 40 [2020-12-22 07:05:21,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:21,447 INFO L481 AbstractCegarLoop]: Abstraction has 421 states and 609 transitions. [2020-12-22 07:05:21,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:05:21,447 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 609 transitions. [2020-12-22 07:05:21,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 07:05:21,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:21,451 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] [2020-12-22 07:05:21,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:05:21,451 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:21,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:21,452 INFO L82 PathProgramCache]: Analyzing trace with hash 913312853, now seen corresponding path program 1 times [2020-12-22 07:05:21,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:21,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163159407] [2020-12-22 07:05:21,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:21,546 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 07:05:21,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163159407] [2020-12-22 07:05:21,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:21,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:05:21,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468921320] [2020-12-22 07:05:21,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:05:21,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:21,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:05:21,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:05:21,550 INFO L87 Difference]: Start difference. First operand 421 states and 609 transitions. Second operand 5 states. [2020-12-22 07:05:21,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:21,703 INFO L93 Difference]: Finished difference Result 1193 states and 1744 transitions. [2020-12-22 07:05:21,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:05:21,703 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-12-22 07:05:21,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:21,709 INFO L225 Difference]: With dead ends: 1193 [2020-12-22 07:05:21,709 INFO L226 Difference]: Without dead ends: 790 [2020-12-22 07:05:21,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 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 07:05:21,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2020-12-22 07:05:21,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 430. [2020-12-22 07:05:21,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-12-22 07:05:21,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 613 transitions. [2020-12-22 07:05:21,758 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 613 transitions. Word has length 40 [2020-12-22 07:05:21,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:21,759 INFO L481 AbstractCegarLoop]: Abstraction has 430 states and 613 transitions. [2020-12-22 07:05:21,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:05:21,759 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 613 transitions. [2020-12-22 07:05:21,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 07:05:21,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:21,766 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] [2020-12-22 07:05:21,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:05:21,768 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:21,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:21,770 INFO L82 PathProgramCache]: Analyzing trace with hash -892125481, now seen corresponding path program 1 times [2020-12-22 07:05:21,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:21,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698391501] [2020-12-22 07:05:21,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:21,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:21,847 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 07:05:21,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698391501] [2020-12-22 07:05:21,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:21,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:05:21,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720144929] [2020-12-22 07:05:21,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:05:21,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:21,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:05:21,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:05:21,850 INFO L87 Difference]: Start difference. First operand 430 states and 613 transitions. Second operand 4 states. [2020-12-22 07:05:22,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:22,066 INFO L93 Difference]: Finished difference Result 1588 states and 2260 transitions. [2020-12-22 07:05:22,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:05:22,066 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-12-22 07:05:22,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:22,072 INFO L225 Difference]: With dead ends: 1588 [2020-12-22 07:05:22,072 INFO L226 Difference]: Without dead ends: 1178 [2020-12-22 07:05:22,074 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 07:05:22,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2020-12-22 07:05:22,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1103. [2020-12-22 07:05:22,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1103 states. [2020-12-22 07:05:22,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1546 transitions. [2020-12-22 07:05:22,152 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1546 transitions. Word has length 40 [2020-12-22 07:05:22,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:22,153 INFO L481 AbstractCegarLoop]: Abstraction has 1103 states and 1546 transitions. [2020-12-22 07:05:22,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:05:22,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1546 transitions. [2020-12-22 07:05:22,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 07:05:22,154 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:22,154 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] [2020-12-22 07:05:22,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:05:22,154 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:22,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:22,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1178051785, now seen corresponding path program 1 times [2020-12-22 07:05:22,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:22,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570943254] [2020-12-22 07:05:22,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:22,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:05:22,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570943254] [2020-12-22 07:05:22,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:22,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:05:22,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770368318] [2020-12-22 07:05:22,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:05:22,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:22,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:05:22,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:05:22,205 INFO L87 Difference]: Start difference. First operand 1103 states and 1546 transitions. Second operand 3 states. [2020-12-22 07:05:22,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:22,356 INFO L93 Difference]: Finished difference Result 2554 states and 3575 transitions. [2020-12-22 07:05:22,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:05:22,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 07:05:22,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:22,365 INFO L225 Difference]: With dead ends: 2554 [2020-12-22 07:05:22,365 INFO L226 Difference]: Without dead ends: 1472 [2020-12-22 07:05:22,367 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 07:05:22,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2020-12-22 07:05:22,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1440. [2020-12-22 07:05:22,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1440 states. [2020-12-22 07:05:22,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 1992 transitions. [2020-12-22 07:05:22,474 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 1992 transitions. Word has length 41 [2020-12-22 07:05:22,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:22,475 INFO L481 AbstractCegarLoop]: Abstraction has 1440 states and 1992 transitions. [2020-12-22 07:05:22,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:05:22,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 1992 transitions. [2020-12-22 07:05:22,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 07:05:22,475 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:22,476 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] [2020-12-22 07:05:22,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:05:22,476 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:22,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:22,477 INFO L82 PathProgramCache]: Analyzing trace with hash 2143426552, now seen corresponding path program 1 times [2020-12-22 07:05:22,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:22,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740897346] [2020-12-22 07:05:22,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:22,577 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 07:05:22,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740897346] [2020-12-22 07:05:22,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:22,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:05:22,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691682027] [2020-12-22 07:05:22,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:05:22,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:22,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:05:22,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:05:22,580 INFO L87 Difference]: Start difference. First operand 1440 states and 1992 transitions. Second operand 5 states. [2020-12-22 07:05:22,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:22,898 INFO L93 Difference]: Finished difference Result 4243 states and 5974 transitions. [2020-12-22 07:05:22,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:05:22,899 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-12-22 07:05:22,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:22,915 INFO L225 Difference]: With dead ends: 4243 [2020-12-22 07:05:22,915 INFO L226 Difference]: Without dead ends: 2828 [2020-12-22 07:05:22,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 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 07:05:22,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2828 states. [2020-12-22 07:05:23,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2828 to 1482. [2020-12-22 07:05:23,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1482 states. [2020-12-22 07:05:23,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 2019 transitions. [2020-12-22 07:05:23,084 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 2019 transitions. Word has length 41 [2020-12-22 07:05:23,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:23,085 INFO L481 AbstractCegarLoop]: Abstraction has 1482 states and 2019 transitions. [2020-12-22 07:05:23,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:05:23,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 2019 transitions. [2020-12-22 07:05:23,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 07:05:23,086 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:23,086 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] [2020-12-22 07:05:23,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:05:23,086 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:23,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:23,087 INFO L82 PathProgramCache]: Analyzing trace with hash 555078650, now seen corresponding path program 1 times [2020-12-22 07:05:23,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:23,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207194426] [2020-12-22 07:05:23,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:23,194 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 07:05:23,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207194426] [2020-12-22 07:05:23,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:23,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:05:23,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443471712] [2020-12-22 07:05:23,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:05:23,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:23,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:05:23,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:05:23,198 INFO L87 Difference]: Start difference. First operand 1482 states and 2019 transitions. Second operand 4 states. [2020-12-22 07:05:23,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:23,621 INFO L93 Difference]: Finished difference Result 5407 states and 7424 transitions. [2020-12-22 07:05:23,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:05:23,622 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-12-22 07:05:23,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:23,648 INFO L225 Difference]: With dead ends: 5407 [2020-12-22 07:05:23,648 INFO L226 Difference]: Without dead ends: 4038 [2020-12-22 07:05:23,659 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 07:05:23,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4038 states. [2020-12-22 07:05:23,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4038 to 2334. [2020-12-22 07:05:23,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2334 states. [2020-12-22 07:05:23,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 3190 transitions. [2020-12-22 07:05:23,887 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 3190 transitions. Word has length 41 [2020-12-22 07:05:23,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:23,888 INFO L481 AbstractCegarLoop]: Abstraction has 2334 states and 3190 transitions. [2020-12-22 07:05:23,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:05:23,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 3190 transitions. [2020-12-22 07:05:23,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 07:05:23,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:23,890 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 07:05:23,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:05:23,890 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:23,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:23,891 INFO L82 PathProgramCache]: Analyzing trace with hash 2112971018, now seen corresponding path program 1 times [2020-12-22 07:05:23,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:23,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351596254] [2020-12-22 07:05:23,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:23,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:24,024 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 07:05:24,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351596254] [2020-12-22 07:05:24,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:24,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:05:24,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995643725] [2020-12-22 07:05:24,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:05:24,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:24,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:05:24,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:05:24,033 INFO L87 Difference]: Start difference. First operand 2334 states and 3190 transitions. Second operand 5 states. [2020-12-22 07:05:24,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:24,671 INFO L93 Difference]: Finished difference Result 8228 states and 11318 transitions. [2020-12-22 07:05:24,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:05:24,671 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-12-22 07:05:24,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:24,703 INFO L225 Difference]: With dead ends: 8228 [2020-12-22 07:05:24,703 INFO L226 Difference]: Without dead ends: 6506 [2020-12-22 07:05:24,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:05:24,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6506 states. [2020-12-22 07:05:25,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6506 to 3825. [2020-12-22 07:05:25,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3825 states. [2020-12-22 07:05:25,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3825 states to 3825 states and 5230 transitions. [2020-12-22 07:05:25,113 INFO L78 Accepts]: Start accepts. Automaton has 3825 states and 5230 transitions. Word has length 48 [2020-12-22 07:05:25,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:25,113 INFO L481 AbstractCegarLoop]: Abstraction has 3825 states and 5230 transitions. [2020-12-22 07:05:25,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:05:25,114 INFO L276 IsEmpty]: Start isEmpty. Operand 3825 states and 5230 transitions. [2020-12-22 07:05:25,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 07:05:25,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:25,115 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 07:05:25,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:05:25,116 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:25,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:25,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1420212558, now seen corresponding path program 1 times [2020-12-22 07:05:25,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:25,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351892661] [2020-12-22 07:05:25,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:25,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:25,152 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 07:05:25,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351892661] [2020-12-22 07:05:25,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:25,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:05:25,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829910618] [2020-12-22 07:05:25,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:05:25,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:25,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:05:25,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:05:25,155 INFO L87 Difference]: Start difference. First operand 3825 states and 5230 transitions. Second operand 3 states. [2020-12-22 07:05:25,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:25,783 INFO L93 Difference]: Finished difference Result 10814 states and 14716 transitions. [2020-12-22 07:05:25,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:05:25,784 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 07:05:25,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:25,824 INFO L225 Difference]: With dead ends: 10814 [2020-12-22 07:05:25,824 INFO L226 Difference]: Without dead ends: 7014 [2020-12-22 07:05:25,833 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 07:05:25,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7014 states. [2020-12-22 07:05:26,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7014 to 6929. [2020-12-22 07:05:26,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6929 states. [2020-12-22 07:05:26,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6929 states to 6929 states and 9289 transitions. [2020-12-22 07:05:26,461 INFO L78 Accepts]: Start accepts. Automaton has 6929 states and 9289 transitions. Word has length 52 [2020-12-22 07:05:26,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:26,462 INFO L481 AbstractCegarLoop]: Abstraction has 6929 states and 9289 transitions. [2020-12-22 07:05:26,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:05:26,462 INFO L276 IsEmpty]: Start isEmpty. Operand 6929 states and 9289 transitions. [2020-12-22 07:05:26,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 07:05:26,463 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:26,464 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 07:05:26,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:05:26,464 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:26,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:26,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1475283929, now seen corresponding path program 1 times [2020-12-22 07:05:26,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:26,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071905603] [2020-12-22 07:05:26,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:26,559 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 07:05:26,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071905603] [2020-12-22 07:05:26,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:26,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:05:26,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228381897] [2020-12-22 07:05:26,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:05:26,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:26,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:05:26,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:05:26,561 INFO L87 Difference]: Start difference. First operand 6929 states and 9289 transitions. Second operand 6 states. [2020-12-22 07:05:27,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:27,810 INFO L93 Difference]: Finished difference Result 19477 states and 26259 transitions. [2020-12-22 07:05:27,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 07:05:27,811 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-12-22 07:05:27,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:27,854 INFO L225 Difference]: With dead ends: 19477 [2020-12-22 07:05:27,854 INFO L226 Difference]: Without dead ends: 13516 [2020-12-22 07:05:27,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:05:27,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13516 states. [2020-12-22 07:05:28,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13516 to 8699. [2020-12-22 07:05:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8699 states. [2020-12-22 07:05:28,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8699 states to 8699 states and 11682 transitions. [2020-12-22 07:05:28,744 INFO L78 Accepts]: Start accepts. Automaton has 8699 states and 11682 transitions. Word has length 53 [2020-12-22 07:05:28,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:28,745 INFO L481 AbstractCegarLoop]: Abstraction has 8699 states and 11682 transitions. [2020-12-22 07:05:28,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:05:28,746 INFO L276 IsEmpty]: Start isEmpty. Operand 8699 states and 11682 transitions. [2020-12-22 07:05:28,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 07:05:28,747 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:28,747 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:28,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:05:28,748 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:28,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:28,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1170295472, now seen corresponding path program 1 times [2020-12-22 07:05:28,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:28,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669926600] [2020-12-22 07:05:28,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:28,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 07:05:28,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669926600] [2020-12-22 07:05:28,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:28,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:05:28,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797546913] [2020-12-22 07:05:28,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:05:28,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:28,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:05:28,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:05:28,828 INFO L87 Difference]: Start difference. First operand 8699 states and 11682 transitions. Second operand 3 states. [2020-12-22 07:05:29,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:29,962 INFO L93 Difference]: Finished difference Result 25130 states and 33481 transitions. [2020-12-22 07:05:29,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:05:29,962 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-12-22 07:05:29,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:30,002 INFO L225 Difference]: With dead ends: 25130 [2020-12-22 07:05:30,003 INFO L226 Difference]: Without dead ends: 16456 [2020-12-22 07:05:30,018 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 07:05:30,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16456 states. [2020-12-22 07:05:31,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16456 to 16450. [2020-12-22 07:05:31,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16450 states. [2020-12-22 07:05:31,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16450 states to 16450 states and 21503 transitions. [2020-12-22 07:05:31,248 INFO L78 Accepts]: Start accepts. Automaton has 16450 states and 21503 transitions. Word has length 57 [2020-12-22 07:05:31,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:31,248 INFO L481 AbstractCegarLoop]: Abstraction has 16450 states and 21503 transitions. [2020-12-22 07:05:31,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:05:31,249 INFO L276 IsEmpty]: Start isEmpty. Operand 16450 states and 21503 transitions. [2020-12-22 07:05:31,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 07:05:31,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:31,251 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 07:05:31,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:05:31,251 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:31,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:31,252 INFO L82 PathProgramCache]: Analyzing trace with hash 171117839, now seen corresponding path program 1 times [2020-12-22 07:05:31,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:31,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65588351] [2020-12-22 07:05:31,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:31,321 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 07:05:31,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65588351] [2020-12-22 07:05:31,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:31,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:05:31,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930036383] [2020-12-22 07:05:31,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:05:31,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:31,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:05:31,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:05:31,325 INFO L87 Difference]: Start difference. First operand 16450 states and 21503 transitions. Second operand 5 states. [2020-12-22 07:05:32,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:32,609 INFO L93 Difference]: Finished difference Result 34582 states and 45486 transitions. [2020-12-22 07:05:32,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:05:32,609 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-12-22 07:05:32,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:32,663 INFO L225 Difference]: With dead ends: 34582 [2020-12-22 07:05:32,663 INFO L226 Difference]: Without dead ends: 21744 [2020-12-22 07:05:32,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:05:32,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21744 states. [2020-12-22 07:05:34,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21744 to 21614. [2020-12-22 07:05:34,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21614 states. [2020-12-22 07:05:34,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21614 states to 21614 states and 28291 transitions. [2020-12-22 07:05:34,785 INFO L78 Accepts]: Start accepts. Automaton has 21614 states and 28291 transitions. Word has length 58 [2020-12-22 07:05:34,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:34,785 INFO L481 AbstractCegarLoop]: Abstraction has 21614 states and 28291 transitions. [2020-12-22 07:05:34,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:05:34,785 INFO L276 IsEmpty]: Start isEmpty. Operand 21614 states and 28291 transitions. [2020-12-22 07:05:34,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 07:05:34,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:34,788 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:34,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:05:34,789 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:34,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:34,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1927952390, now seen corresponding path program 1 times [2020-12-22 07:05:34,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:34,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492002773] [2020-12-22 07:05:34,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:34,838 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:05:34,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492002773] [2020-12-22 07:05:34,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:34,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:05:34,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433403002] [2020-12-22 07:05:34,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:05:34,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:34,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:05:34,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:05:34,840 INFO L87 Difference]: Start difference. First operand 21614 states and 28291 transitions. Second operand 4 states. [2020-12-22 07:05:37,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:37,262 INFO L93 Difference]: Finished difference Result 57325 states and 74908 transitions. [2020-12-22 07:05:37,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:05:37,262 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-12-22 07:05:37,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:37,352 INFO L225 Difference]: With dead ends: 57325 [2020-12-22 07:05:37,353 INFO L226 Difference]: Without dead ends: 35757 [2020-12-22 07:05:37,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 07:05:37,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35757 states. [2020-12-22 07:05:39,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35757 to 31601. [2020-12-22 07:05:39,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31601 states. [2020-12-22 07:05:39,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31601 states to 31601 states and 41064 transitions. [2020-12-22 07:05:39,746 INFO L78 Accepts]: Start accepts. Automaton has 31601 states and 41064 transitions. Word has length 59 [2020-12-22 07:05:39,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:39,747 INFO L481 AbstractCegarLoop]: Abstraction has 31601 states and 41064 transitions. [2020-12-22 07:05:39,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:05:39,747 INFO L276 IsEmpty]: Start isEmpty. Operand 31601 states and 41064 transitions. [2020-12-22 07:05:39,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 07:05:39,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:39,753 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 07:05:39,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:05:39,753 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:39,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:39,754 INFO L82 PathProgramCache]: Analyzing trace with hash -348509553, now seen corresponding path program 1 times [2020-12-22 07:05:39,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:39,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070930020] [2020-12-22 07:05:39,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:39,843 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 07:05:39,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070930020] [2020-12-22 07:05:39,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:39,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:05:39,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991415840] [2020-12-22 07:05:39,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:05:39,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:39,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:05:39,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:05:39,846 INFO L87 Difference]: Start difference. First operand 31601 states and 41064 transitions. Second operand 6 states. [2020-12-22 07:05:44,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:44,780 INFO L93 Difference]: Finished difference Result 98909 states and 129770 transitions. [2020-12-22 07:05:44,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 07:05:44,780 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-12-22 07:05:44,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:44,919 INFO L225 Difference]: With dead ends: 98909 [2020-12-22 07:05:44,919 INFO L226 Difference]: Without dead ends: 74877 [2020-12-22 07:05:44,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:05:45,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74877 states. [2020-12-22 07:05:48,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74877 to 43651. [2020-12-22 07:05:48,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43651 states. [2020-12-22 07:05:48,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43651 states to 43651 states and 56948 transitions. [2020-12-22 07:05:48,455 INFO L78 Accepts]: Start accepts. Automaton has 43651 states and 56948 transitions. Word has length 61 [2020-12-22 07:05:48,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:48,455 INFO L481 AbstractCegarLoop]: Abstraction has 43651 states and 56948 transitions. [2020-12-22 07:05:48,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:05:48,455 INFO L276 IsEmpty]: Start isEmpty. Operand 43651 states and 56948 transitions. [2020-12-22 07:05:48,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:05:48,460 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:48,460 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:48,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:05:48,460 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:48,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:48,461 INFO L82 PathProgramCache]: Analyzing trace with hash 807662601, now seen corresponding path program 1 times [2020-12-22 07:05:48,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:48,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187210166] [2020-12-22 07:05:48,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:48,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:48,493 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:05:48,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187210166] [2020-12-22 07:05:48,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:48,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:05:48,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299284747] [2020-12-22 07:05:48,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:05:48,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:48,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:05:48,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:05:48,496 INFO L87 Difference]: Start difference. First operand 43651 states and 56948 transitions. Second operand 3 states. [2020-12-22 07:05:51,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:51,305 INFO L93 Difference]: Finished difference Result 82740 states and 108197 transitions. [2020-12-22 07:05:51,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:05:51,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:05:51,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:51,376 INFO L225 Difference]: With dead ends: 82740 [2020-12-22 07:05:51,376 INFO L226 Difference]: Without dead ends: 43655 [2020-12-22 07:05:51,419 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 07:05:51,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43655 states. [2020-12-22 07:05:54,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43655 to 43651. [2020-12-22 07:05:54,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43651 states. [2020-12-22 07:05:54,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43651 states to 43651 states and 56591 transitions. [2020-12-22 07:05:54,192 INFO L78 Accepts]: Start accepts. Automaton has 43651 states and 56591 transitions. Word has length 65 [2020-12-22 07:05:54,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:54,193 INFO L481 AbstractCegarLoop]: Abstraction has 43651 states and 56591 transitions. [2020-12-22 07:05:54,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:05:54,193 INFO L276 IsEmpty]: Start isEmpty. Operand 43651 states and 56591 transitions. [2020-12-22 07:05:54,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:05:54,197 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:54,197 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:54,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:05:54,198 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:54,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:54,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1009486535, now seen corresponding path program 1 times [2020-12-22 07:05:54,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:54,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958794716] [2020-12-22 07:05:54,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:54,218 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 07:05:54,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958794716] [2020-12-22 07:05:54,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:54,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:05:54,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068850385] [2020-12-22 07:05:54,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:05:54,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:54,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:05:54,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:05:54,221 INFO L87 Difference]: Start difference. First operand 43651 states and 56591 transitions. Second operand 3 states. [2020-12-22 07:05:57,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:57,041 INFO L93 Difference]: Finished difference Result 46535 states and 60111 transitions. [2020-12-22 07:05:57,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:05:57,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:05:57,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:57,090 INFO L225 Difference]: With dead ends: 46535 [2020-12-22 07:05:57,090 INFO L226 Difference]: Without dead ends: 43613 [2020-12-22 07:05:57,102 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 07:05:57,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43613 states. [2020-12-22 07:06:00,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43613 to 43613. [2020-12-22 07:06:00,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43613 states. [2020-12-22 07:06:00,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43613 states to 43613 states and 56551 transitions. [2020-12-22 07:06:00,077 INFO L78 Accepts]: Start accepts. Automaton has 43613 states and 56551 transitions. Word has length 65 [2020-12-22 07:06:00,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:06:00,077 INFO L481 AbstractCegarLoop]: Abstraction has 43613 states and 56551 transitions. [2020-12-22 07:06:00,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:06:00,078 INFO L276 IsEmpty]: Start isEmpty. Operand 43613 states and 56551 transitions. [2020-12-22 07:06:00,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:06:00,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:06:00,083 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:06:00,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:06:00,083 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:06:00,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:06:00,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1172878516, now seen corresponding path program 1 times [2020-12-22 07:06:00,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:06:00,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396671732] [2020-12-22 07:06:00,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:06:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:00,120 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:06:00,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396671732] [2020-12-22 07:06:00,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:06:00,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:06:00,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209245494] [2020-12-22 07:06:00,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:06:00,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:06:00,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:06:00,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:06:00,122 INFO L87 Difference]: Start difference. First operand 43613 states and 56551 transitions. Second operand 4 states. [2020-12-22 07:06:03,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:06:03,377 INFO L93 Difference]: Finished difference Result 87652 states and 113597 transitions. [2020-12-22 07:06:03,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:06:03,379 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-12-22 07:06:03,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:06:03,437 INFO L225 Difference]: With dead ends: 87652 [2020-12-22 07:06:03,438 INFO L226 Difference]: Without dead ends: 44085 [2020-12-22 07:06:03,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 07:06:03,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44085 states. [2020-12-22 07:06:06,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44085 to 43613. [2020-12-22 07:06:06,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43613 states. [2020-12-22 07:06:06,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43613 states to 43613 states and 55711 transitions. [2020-12-22 07:06:06,331 INFO L78 Accepts]: Start accepts. Automaton has 43613 states and 55711 transitions. Word has length 66 [2020-12-22 07:06:06,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:06:06,331 INFO L481 AbstractCegarLoop]: Abstraction has 43613 states and 55711 transitions. [2020-12-22 07:06:06,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:06:06,331 INFO L276 IsEmpty]: Start isEmpty. Operand 43613 states and 55711 transitions. [2020-12-22 07:06:06,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 07:06:06,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:06:06,336 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:06:06,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:06:06,336 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:06:06,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:06:06,337 INFO L82 PathProgramCache]: Analyzing trace with hash 2075083770, now seen corresponding path program 1 times [2020-12-22 07:06:06,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:06:06,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510759476] [2020-12-22 07:06:06,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:06:06,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:06,370 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:06:06,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510759476] [2020-12-22 07:06:06,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:06:06,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:06:06,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083917818] [2020-12-22 07:06:06,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:06:06,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:06:06,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:06:06,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:06:06,372 INFO L87 Difference]: Start difference. First operand 43613 states and 55711 transitions. Second operand 4 states. [2020-12-22 07:06:09,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:06:09,637 INFO L93 Difference]: Finished difference Result 88332 states and 112741 transitions. [2020-12-22 07:06:09,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:06:09,638 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-12-22 07:06:09,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:06:09,693 INFO L225 Difference]: With dead ends: 88332 [2020-12-22 07:06:09,694 INFO L226 Difference]: Without dead ends: 44380 [2020-12-22 07:06:09,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 07:06:09,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44380 states. [2020-12-22 07:06:12,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44380 to 42903. [2020-12-22 07:06:12,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42903 states. [2020-12-22 07:06:12,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42903 states to 42903 states and 54372 transitions. [2020-12-22 07:06:12,707 INFO L78 Accepts]: Start accepts. Automaton has 42903 states and 54372 transitions. Word has length 68 [2020-12-22 07:06:12,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:06:12,707 INFO L481 AbstractCegarLoop]: Abstraction has 42903 states and 54372 transitions. [2020-12-22 07:06:12,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:06:12,708 INFO L276 IsEmpty]: Start isEmpty. Operand 42903 states and 54372 transitions. [2020-12-22 07:06:12,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 07:06:12,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:06:12,710 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:06:12,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:06:12,711 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:06:12,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:06:12,711 INFO L82 PathProgramCache]: Analyzing trace with hash 556975009, now seen corresponding path program 1 times [2020-12-22 07:06:12,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:06:12,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742892334] [2020-12-22 07:06:12,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:06:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:12,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:06:12,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742892334] [2020-12-22 07:06:12,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:06:12,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:06:12,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923262532] [2020-12-22 07:06:12,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:06:12,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:06:12,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:06:12,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:06:12,752 INFO L87 Difference]: Start difference. First operand 42903 states and 54372 transitions. Second operand 5 states. [2020-12-22 07:06:19,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:06:19,407 INFO L93 Difference]: Finished difference Result 130746 states and 166486 transitions. [2020-12-22 07:06:19,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 07:06:19,408 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-12-22 07:06:19,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:06:19,522 INFO L225 Difference]: With dead ends: 130746 [2020-12-22 07:06:19,523 INFO L226 Difference]: Without dead ends: 96122 [2020-12-22 07:06:19,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:06:19,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96122 states. [2020-12-22 07:06:23,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96122 to 47799. [2020-12-22 07:06:23,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47799 states. [2020-12-22 07:06:23,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47799 states to 47799 states and 60509 transitions. [2020-12-22 07:06:23,386 INFO L78 Accepts]: Start accepts. Automaton has 47799 states and 60509 transitions. Word has length 69 [2020-12-22 07:06:23,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:06:23,386 INFO L481 AbstractCegarLoop]: Abstraction has 47799 states and 60509 transitions. [2020-12-22 07:06:23,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:06:23,386 INFO L276 IsEmpty]: Start isEmpty. Operand 47799 states and 60509 transitions. [2020-12-22 07:06:23,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 07:06:23,393 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:06:23,393 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:06:23,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:06:23,393 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:06:23,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:06:23,394 INFO L82 PathProgramCache]: Analyzing trace with hash -636342002, now seen corresponding path program 1 times [2020-12-22 07:06:23,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:06:23,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512770781] [2020-12-22 07:06:23,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:06:23,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:06:23,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512770781] [2020-12-22 07:06:23,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:06:23,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:06:23,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101524920] [2020-12-22 07:06:23,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:06:23,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:06:23,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:06:23,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:06:23,464 INFO L87 Difference]: Start difference. First operand 47799 states and 60509 transitions. Second operand 3 states. [2020-12-22 07:06:29,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:06:29,782 INFO L93 Difference]: Finished difference Result 126093 states and 160418 transitions. [2020-12-22 07:06:29,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:06:29,783 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2020-12-22 07:06:29,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:06:29,893 INFO L225 Difference]: With dead ends: 126093 [2020-12-22 07:06:29,893 INFO L226 Difference]: Without dead ends: 81633 [2020-12-22 07:06:29,931 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 07:06:29,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81633 states. [2020-12-22 07:06:35,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81633 to 73237. [2020-12-22 07:06:35,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73237 states. [2020-12-22 07:06:35,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73237 states to 73237 states and 93375 transitions. [2020-12-22 07:06:35,400 INFO L78 Accepts]: Start accepts. Automaton has 73237 states and 93375 transitions. Word has length 85 [2020-12-22 07:06:35,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:06:35,400 INFO L481 AbstractCegarLoop]: Abstraction has 73237 states and 93375 transitions. [2020-12-22 07:06:35,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:06:35,400 INFO L276 IsEmpty]: Start isEmpty. Operand 73237 states and 93375 transitions. [2020-12-22 07:06:35,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 07:06:35,410 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:06:35,410 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:06:35,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:06:35,412 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:06:35,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:06:35,413 INFO L82 PathProgramCache]: Analyzing trace with hash 929392569, now seen corresponding path program 1 times [2020-12-22 07:06:35,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:06:35,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436743105] [2020-12-22 07:06:35,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:06:35,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:35,485 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 07:06:35,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436743105] [2020-12-22 07:06:35,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:06:35,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:06:35,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076462782] [2020-12-22 07:06:35,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:06:35,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:06:35,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:06:35,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:06:35,491 INFO L87 Difference]: Start difference. First operand 73237 states and 93375 transitions. Second operand 5 states. [2020-12-22 07:06:47,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:06:47,027 INFO L93 Difference]: Finished difference Result 228402 states and 289207 transitions. [2020-12-22 07:06:47,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:06:47,030 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2020-12-22 07:06:47,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:06:47,242 INFO L225 Difference]: With dead ends: 228402 [2020-12-22 07:06:47,243 INFO L226 Difference]: Without dead ends: 155211 [2020-12-22 07:06:47,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:06:47,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155211 states. [2020-12-22 07:06:57,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155211 to 130982. [2020-12-22 07:06:57,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130982 states. [2020-12-22 07:06:57,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130982 states to 130982 states and 162011 transitions. [2020-12-22 07:06:57,458 INFO L78 Accepts]: Start accepts. Automaton has 130982 states and 162011 transitions. Word has length 98 [2020-12-22 07:06:57,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:06:57,461 INFO L481 AbstractCegarLoop]: Abstraction has 130982 states and 162011 transitions. [2020-12-22 07:06:57,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:06:57,461 INFO L276 IsEmpty]: Start isEmpty. Operand 130982 states and 162011 transitions. [2020-12-22 07:06:57,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 07:06:57,476 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:06:57,476 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:06:57,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:06:57,477 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:06:57,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:06:57,477 INFO L82 PathProgramCache]: Analyzing trace with hash -424178660, now seen corresponding path program 1 times [2020-12-22 07:06:57,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:06:57,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717473792] [2020-12-22 07:06:57,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:06:57,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 07:06:57,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717473792] [2020-12-22 07:06:57,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:06:57,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:06:57,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684725293] [2020-12-22 07:06:57,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:06:57,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:06:57,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:06:57,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:06:57,524 INFO L87 Difference]: Start difference. First operand 130982 states and 162011 transitions. Second operand 5 states. [2020-12-22 07:07:04,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:07:04,170 INFO L93 Difference]: Finished difference Result 203946 states and 253728 transitions. [2020-12-22 07:07:04,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:07:04,171 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 100 [2020-12-22 07:07:04,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:07:04,271 INFO L225 Difference]: With dead ends: 203946 [2020-12-22 07:07:04,271 INFO L226 Difference]: Without dead ends: 73010 [2020-12-22 07:07:04,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 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 07:07:04,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73010 states. [2020-12-22 07:07:09,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73010 to 64376. [2020-12-22 07:07:09,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64376 states. [2020-12-22 07:07:10,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64376 states to 64376 states and 80869 transitions. [2020-12-22 07:07:10,035 INFO L78 Accepts]: Start accepts. Automaton has 64376 states and 80869 transitions. Word has length 100 [2020-12-22 07:07:10,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:07:10,035 INFO L481 AbstractCegarLoop]: Abstraction has 64376 states and 80869 transitions. [2020-12-22 07:07:10,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:07:10,036 INFO L276 IsEmpty]: Start isEmpty. Operand 64376 states and 80869 transitions. [2020-12-22 07:07:10,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 07:07:10,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:07:10,043 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:07:10,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:07:10,044 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:07:10,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:07:10,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1632792131, now seen corresponding path program 1 times [2020-12-22 07:07:10,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:07:10,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562750247] [2020-12-22 07:07:10,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:07:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-22 07:07:10,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562750247] [2020-12-22 07:07:10,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:07:10,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:07:10,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828682341] [2020-12-22 07:07:10,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:07:10,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:07:10,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:07:10,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:07:10,079 INFO L87 Difference]: Start difference. First operand 64376 states and 80869 transitions. Second operand 3 states.