/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/product-lines/email_spec11_product37.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:22:19,508 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:22:19,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:22:19,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:22:19,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:22:19,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:22:19,550 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:22:19,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:22:19,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:22:19,557 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:22:19,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:22:19,560 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:22:19,560 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:22:19,562 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:22:19,564 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:22:19,565 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:22:19,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:22:19,568 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:22:19,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:22:19,573 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:22:19,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:22:19,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:22:19,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:22:19,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:22:19,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:22:19,594 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:22:19,595 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:22:19,608 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:22:19,610 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:22:19,611 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:22:19,612 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:22:19,613 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:22:19,613 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:22:19,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:22:19,615 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:22:19,616 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:22:19,622 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:22:19,652 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:22:19,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:22:19,654 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:22:19,654 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:22:19,655 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:22:19,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:22:19,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:22:19,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:22:19,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:22:19,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:22:19,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:22:19,656 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:22:19,657 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:22:19,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:22:19,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:22:19,657 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:22:19,657 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:22:19,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:22:19,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:22:19,658 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:22:19,658 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:22:19,659 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:22:19,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:22:19,659 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:22:19,659 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:22:19,659 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:22:20,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:22:20,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:22:20,085 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:22:20,086 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:22:20,087 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:22:20,088 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/email_spec11_product37.cil.c [2020-12-22 06:22:20,186 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7b8c85c7/4c4d374f2f974a138e483fd5806cae49/FLAG62a398443 [2020-12-22 06:22:21,064 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:22:21,065 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/email_spec11_product37.cil.c [2020-12-22 06:22:21,086 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7b8c85c7/4c4d374f2f974a138e483fd5806cae49/FLAG62a398443 [2020-12-22 06:22:21,201 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7b8c85c7/4c4d374f2f974a138e483fd5806cae49 [2020-12-22 06:22:21,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:22:21,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:22:21,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:22:21,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:22:21,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:22:21,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:22:21" (1/1) ... [2020-12-22 06:22:21,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f72bfc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:22:21, skipping insertion in model container [2020-12-22 06:22:21,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:22:21" (1/1) ... [2020-12-22 06:22:21,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:22:21,342 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:22:21,895 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/email_spec11_product37.cil.c[43431,43444] [2020-12-22 06:22:22,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:22:22,050 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:22:22,193 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/email_spec11_product37.cil.c[43431,43444] [2020-12-22 06:22:22,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:22:22,383 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:22:22,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:22:22 WrapperNode [2020-12-22 06:22:22,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:22:22,386 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:22:22,387 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:22:22,387 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:22:22,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:22:22" (1/1) ... [2020-12-22 06:22:22,462 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:22:22" (1/1) ... [2020-12-22 06:22:22,557 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:22:22,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:22:22,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:22:22,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:22:22,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:22:22" (1/1) ... [2020-12-22 06:22:22,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:22:22" (1/1) ... [2020-12-22 06:22:22,579 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:22:22" (1/1) ... [2020-12-22 06:22:22,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:22:22" (1/1) ... [2020-12-22 06:22:22,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:22:22" (1/1) ... [2020-12-22 06:22:22,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:22:22" (1/1) ... [2020-12-22 06:22:22,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:22:22" (1/1) ... [2020-12-22 06:22:22,674 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:22:22,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:22:22,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:22:22,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:22:22,678 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:22:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:22:22,817 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-12-22 06:22:22,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:22:22,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:22:22,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:22:22,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:22:24,766 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:22:24,767 INFO L299 CfgBuilder]: Removed 247 assume(true) statements. [2020-12-22 06:22:24,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:22:24 BoogieIcfgContainer [2020-12-22 06:22:24,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:22:24,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:22:24,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:22:24,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:22:24,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:22:21" (1/3) ... [2020-12-22 06:22:24,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c5b93ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:22:24, skipping insertion in model container [2020-12-22 06:22:24,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:22:22" (2/3) ... [2020-12-22 06:22:24,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c5b93ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:22:24, skipping insertion in model container [2020-12-22 06:22:24,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:22:24" (3/3) ... [2020-12-22 06:22:24,794 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec11_product37.cil.c [2020-12-22 06:22:24,802 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:22:24,807 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 06:22:24,828 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 06:22:24,860 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:22:24,861 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:22:24,861 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:22:24,861 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:22:24,861 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:22:24,862 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:22:24,862 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:22:24,862 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:22:24,887 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states. [2020-12-22 06:22:24,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 06:22:24,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:22:24,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:22:24,902 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:22:24,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:22:24,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1771516082, now seen corresponding path program 1 times [2020-12-22 06:22:24,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:22:24,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042305972] [2020-12-22 06:22:24,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:22:25,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:22:25,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:22:25,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042305972] [2020-12-22 06:22:25,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:22:25,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:22:25,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342822950] [2020-12-22 06:22:25,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:22:25,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:22:25,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:22:25,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:22:25,397 INFO L87 Difference]: Start difference. First operand 357 states. Second operand 3 states. [2020-12-22 06:22:25,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:22:25,560 INFO L93 Difference]: Finished difference Result 1036 states and 1799 transitions. [2020-12-22 06:22:25,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:22:25,563 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-12-22 06:22:25,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:22:25,600 INFO L225 Difference]: With dead ends: 1036 [2020-12-22 06:22:25,600 INFO L226 Difference]: Without dead ends: 632 [2020-12-22 06:22:25,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:22:25,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2020-12-22 06:22:25,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 325. [2020-12-22 06:22:25,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-12-22 06:22:25,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 561 transitions. [2020-12-22 06:22:25,735 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 561 transitions. Word has length 38 [2020-12-22 06:22:25,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:22:25,736 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 561 transitions. [2020-12-22 06:22:25,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:22:25,736 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 561 transitions. [2020-12-22 06:22:25,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 06:22:25,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:22:25,747 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 06:22:25,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:22:25,748 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:22:25,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:22:25,751 INFO L82 PathProgramCache]: Analyzing trace with hash 109732933, now seen corresponding path program 1 times [2020-12-22 06:22:25,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:22:25,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59048804] [2020-12-22 06:22:25,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:22:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:22:25,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:22:25,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59048804] [2020-12-22 06:22:25,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:22:25,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:22:25,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101362677] [2020-12-22 06:22:25,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:22:25,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:22:25,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:22:25,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:22:25,939 INFO L87 Difference]: Start difference. First operand 325 states and 561 transitions. Second operand 5 states. [2020-12-22 06:22:26,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:22:26,155 INFO L93 Difference]: Finished difference Result 924 states and 1599 transitions. [2020-12-22 06:22:26,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:22:26,156 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-12-22 06:22:26,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:22:26,160 INFO L225 Difference]: With dead ends: 924 [2020-12-22 06:22:26,161 INFO L226 Difference]: Without dead ends: 618 [2020-12-22 06:22:26,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:22:26,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-12-22 06:22:26,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 325. [2020-12-22 06:22:26,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-12-22 06:22:26,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 560 transitions. [2020-12-22 06:22:26,183 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 560 transitions. Word has length 40 [2020-12-22 06:22:26,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:22:26,183 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 560 transitions. [2020-12-22 06:22:26,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:22:26,184 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 560 transitions. [2020-12-22 06:22:26,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 06:22:26,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:22:26,185 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 06:22:26,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:22:26,186 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:22:26,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:22:26,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1493905042, now seen corresponding path program 1 times [2020-12-22 06:22:26,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:22:26,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772538519] [2020-12-22 06:22:26,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:22:26,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:22:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:22:26,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772538519] [2020-12-22 06:22:26,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:22:26,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:22:26,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043952755] [2020-12-22 06:22:26,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:22:26,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:22:26,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:22:26,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:22:26,283 INFO L87 Difference]: Start difference. First operand 325 states and 560 transitions. Second operand 3 states. [2020-12-22 06:22:26,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:22:26,324 INFO L93 Difference]: Finished difference Result 632 states and 1094 transitions. [2020-12-22 06:22:26,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:22:26,325 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 06:22:26,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:22:26,327 INFO L225 Difference]: With dead ends: 632 [2020-12-22 06:22:26,327 INFO L226 Difference]: Without dead ends: 330 [2020-12-22 06:22:26,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:22:26,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-12-22 06:22:26,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 325. [2020-12-22 06:22:26,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-12-22 06:22:26,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 559 transitions. [2020-12-22 06:22:26,369 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 559 transitions. Word has length 41 [2020-12-22 06:22:26,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:22:26,377 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 559 transitions. [2020-12-22 06:22:26,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:22:26,378 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 559 transitions. [2020-12-22 06:22:26,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 06:22:26,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:22:26,381 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] [2020-12-22 06:22:26,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:22:26,381 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:22:26,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:22:26,382 INFO L82 PathProgramCache]: Analyzing trace with hash -2066536104, now seen corresponding path program 1 times [2020-12-22 06:22:26,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:22:26,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057062849] [2020-12-22 06:22:26,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:22:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:22:26,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:22:26,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057062849] [2020-12-22 06:22:26,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:22:26,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:22:26,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439423106] [2020-12-22 06:22:26,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:22:26,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:22:26,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:22:26,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:22:26,526 INFO L87 Difference]: Start difference. First operand 325 states and 559 transitions. Second operand 3 states. [2020-12-22 06:22:26,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:22:26,567 INFO L93 Difference]: Finished difference Result 642 states and 1107 transitions. [2020-12-22 06:22:26,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:22:26,567 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2020-12-22 06:22:26,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:22:26,570 INFO L225 Difference]: With dead ends: 642 [2020-12-22 06:22:26,570 INFO L226 Difference]: Without dead ends: 325 [2020-12-22 06:22:26,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:22:26,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-12-22 06:22:26,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2020-12-22 06:22:26,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-12-22 06:22:26,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 557 transitions. [2020-12-22 06:22:26,587 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 557 transitions. Word has length 42 [2020-12-22 06:22:26,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:22:26,588 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 557 transitions. [2020-12-22 06:22:26,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:22:26,588 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 557 transitions. [2020-12-22 06:22:26,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 06:22:26,589 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:22:26,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:22:26,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:22:26,590 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:22:26,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:22:26,590 INFO L82 PathProgramCache]: Analyzing trace with hash -615962899, now seen corresponding path program 1 times [2020-12-22 06:22:26,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:22:26,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602235899] [2020-12-22 06:22:26,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:22:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:22:26,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:22:26,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602235899] [2020-12-22 06:22:26,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:22:26,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:22:26,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532047417] [2020-12-22 06:22:26,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:22:26,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:22:26,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:22:26,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:22:26,738 INFO L87 Difference]: Start difference. First operand 325 states and 557 transitions. Second operand 5 states. [2020-12-22 06:22:27,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:22:27,008 INFO L93 Difference]: Finished difference Result 914 states and 1579 transitions. [2020-12-22 06:22:27,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:22:27,016 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-22 06:22:27,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:22:27,022 INFO L225 Difference]: With dead ends: 914 [2020-12-22 06:22:27,022 INFO L226 Difference]: Without dead ends: 616 [2020-12-22 06:22:27,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:22:27,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2020-12-22 06:22:27,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 325. [2020-12-22 06:22:27,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-12-22 06:22:27,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 556 transitions. [2020-12-22 06:22:27,071 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 556 transitions. Word has length 43 [2020-12-22 06:22:27,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:22:27,072 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 556 transitions. [2020-12-22 06:22:27,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:22:27,072 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 556 transitions. [2020-12-22 06:22:27,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 06:22:27,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:22:27,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:22:27,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:22:27,073 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:22:27,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:22:27,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1828845712, now seen corresponding path program 1 times [2020-12-22 06:22:27,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:22:27,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442214703] [2020-12-22 06:22:27,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:22:27,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:22:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:22:27,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442214703] [2020-12-22 06:22:27,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:22:27,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:22:27,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090761288] [2020-12-22 06:22:27,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:22:27,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:22:27,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:22:27,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:22:27,207 INFO L87 Difference]: Start difference. First operand 325 states and 556 transitions. Second operand 5 states. [2020-12-22 06:22:27,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:22:27,430 INFO L93 Difference]: Finished difference Result 919 states and 1584 transitions. [2020-12-22 06:22:27,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:22:27,431 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-12-22 06:22:27,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:22:27,436 INFO L225 Difference]: With dead ends: 919 [2020-12-22 06:22:27,436 INFO L226 Difference]: Without dead ends: 621 [2020-12-22 06:22:27,437 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 06:22:27,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2020-12-22 06:22:27,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 325. [2020-12-22 06:22:27,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-12-22 06:22:27,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 555 transitions. [2020-12-22 06:22:27,462 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 555 transitions. Word has length 44 [2020-12-22 06:22:27,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:22:27,462 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 555 transitions. [2020-12-22 06:22:27,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:22:27,462 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 555 transitions. [2020-12-22 06:22:27,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 06:22:27,463 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:22:27,464 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] [2020-12-22 06:22:27,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:22:27,464 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:22:27,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:22:27,465 INFO L82 PathProgramCache]: Analyzing trace with hash -26532440, now seen corresponding path program 1 times [2020-12-22 06:22:27,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:22:27,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659443065] [2020-12-22 06:22:27,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:22:27,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:22:27,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:22:27,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659443065] [2020-12-22 06:22:27,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:22:27,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:22:27,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654245044] [2020-12-22 06:22:27,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:22:27,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:22:27,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:22:27,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:22:27,534 INFO L87 Difference]: Start difference. First operand 325 states and 555 transitions. Second operand 3 states. [2020-12-22 06:22:27,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:22:27,562 INFO L93 Difference]: Finished difference Result 408 states and 679 transitions. [2020-12-22 06:22:27,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:22:27,563 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-12-22 06:22:27,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:22:27,566 INFO L225 Difference]: With dead ends: 408 [2020-12-22 06:22:27,566 INFO L226 Difference]: Without dead ends: 328 [2020-12-22 06:22:27,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:22:27,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-12-22 06:22:27,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 327. [2020-12-22 06:22:27,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-12-22 06:22:27,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 557 transitions. [2020-12-22 06:22:27,592 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 557 transitions. Word has length 45 [2020-12-22 06:22:27,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:22:27,594 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 557 transitions. [2020-12-22 06:22:27,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:22:27,595 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 557 transitions. [2020-12-22 06:22:27,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 06:22:27,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:22:27,596 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 06:22:27,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:22:27,596 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:22:27,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:22:27,597 INFO L82 PathProgramCache]: Analyzing trace with hash 887564822, now seen corresponding path program 1 times [2020-12-22 06:22:27,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:22:27,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882226361] [2020-12-22 06:22:27,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:22:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:22:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:22:27,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882226361] [2020-12-22 06:22:27,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:22:27,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:22:27,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419817843] [2020-12-22 06:22:27,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:22:27,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:22:27,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:22:27,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:22:27,706 INFO L87 Difference]: Start difference. First operand 327 states and 557 transitions. Second operand 3 states. [2020-12-22 06:22:27,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:22:27,755 INFO L93 Difference]: Finished difference Result 867 states and 1495 transitions. [2020-12-22 06:22:27,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:22:27,756 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-12-22 06:22:27,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:22:27,761 INFO L225 Difference]: With dead ends: 867 [2020-12-22 06:22:27,761 INFO L226 Difference]: Without dead ends: 571 [2020-12-22 06:22:27,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:22:27,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-12-22 06:22:27,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 491. [2020-12-22 06:22:27,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-12-22 06:22:27,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 857 transitions. [2020-12-22 06:22:27,800 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 857 transitions. Word has length 53 [2020-12-22 06:22:27,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:22:27,802 INFO L481 AbstractCegarLoop]: Abstraction has 491 states and 857 transitions. [2020-12-22 06:22:27,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:22:27,804 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 857 transitions. [2020-12-22 06:22:27,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 06:22:27,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:22:27,806 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 06:22:27,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:22:27,808 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:22:27,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:22:27,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1839448245, now seen corresponding path program 1 times [2020-12-22 06:22:27,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:22:27,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773949970] [2020-12-22 06:22:27,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:22:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:22:27,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:22:27,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773949970] [2020-12-22 06:22:27,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:22:27,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:22:27,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116669167] [2020-12-22 06:22:27,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:22:27,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:22:27,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:22:27,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:22:27,944 INFO L87 Difference]: Start difference. First operand 491 states and 857 transitions. Second operand 5 states. [2020-12-22 06:22:28,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:22:28,196 INFO L93 Difference]: Finished difference Result 1403 states and 2477 transitions. [2020-12-22 06:22:28,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:22:28,197 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-12-22 06:22:28,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:22:28,204 INFO L225 Difference]: With dead ends: 1403 [2020-12-22 06:22:28,204 INFO L226 Difference]: Without dead ends: 943 [2020-12-22 06:22:28,206 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 06:22:28,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2020-12-22 06:22:28,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 491. [2020-12-22 06:22:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-12-22 06:22:28,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 855 transitions. [2020-12-22 06:22:28,256 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 855 transitions. Word has length 54 [2020-12-22 06:22:28,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:22:28,259 INFO L481 AbstractCegarLoop]: Abstraction has 491 states and 855 transitions. [2020-12-22 06:22:28,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:22:28,259 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 855 transitions. [2020-12-22 06:22:28,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 06:22:28,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:22:28,260 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 06:22:28,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 06:22:28,261 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:22:28,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:22:28,261 INFO L82 PathProgramCache]: Analyzing trace with hash -568587444, now seen corresponding path program 1 times [2020-12-22 06:22:28,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:22:28,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951903656] [2020-12-22 06:22:28,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:22:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:22:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:22:28,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951903656] [2020-12-22 06:22:28,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:22:28,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:22:28,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350964283] [2020-12-22 06:22:28,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:22:28,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:22:28,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:22:28,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:22:28,364 INFO L87 Difference]: Start difference. First operand 491 states and 855 transitions. Second operand 3 states. [2020-12-22 06:22:28,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:22:28,452 INFO L93 Difference]: Finished difference Result 1401 states and 2469 transitions. [2020-12-22 06:22:28,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:22:28,455 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-12-22 06:22:28,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:22:28,461 INFO L225 Difference]: With dead ends: 1401 [2020-12-22 06:22:28,462 INFO L226 Difference]: Without dead ends: 941 [2020-12-22 06:22:28,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:22:28,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2020-12-22 06:22:28,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 861. [2020-12-22 06:22:28,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 861 states. [2020-12-22 06:22:28,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1532 transitions. [2020-12-22 06:22:28,526 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1532 transitions. Word has length 55 [2020-12-22 06:22:28,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:22:28,527 INFO L481 AbstractCegarLoop]: Abstraction has 861 states and 1532 transitions. [2020-12-22 06:22:28,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:22:28,527 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1532 transitions. [2020-12-22 06:22:28,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 06:22:28,528 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:22:28,529 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 06:22:28,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:22:28,529 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:22:28,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:22:28,530 INFO L82 PathProgramCache]: Analyzing trace with hash -880529814, now seen corresponding path program 1 times [2020-12-22 06:22:28,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:22:28,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484452110] [2020-12-22 06:22:28,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:22:28,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:22:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:22:28,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484452110] [2020-12-22 06:22:28,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812654296] [2020-12-22 06:22:28,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:22:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:22:29,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 06:22:29,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:22:29,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:22:29,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:22:29,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 06:22:29,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881515355] [2020-12-22 06:22:29,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:22:29,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:22:29,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:22:29,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:22:29,121 INFO L87 Difference]: Start difference. First operand 861 states and 1532 transitions. Second operand 5 states. [2020-12-22 06:22:29,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:22:29,215 INFO L93 Difference]: Finished difference Result 1244 states and 2175 transitions. [2020-12-22 06:22:29,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:22:29,216 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 06:22:29,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:22:29,223 INFO L225 Difference]: With dead ends: 1244 [2020-12-22 06:22:29,223 INFO L226 Difference]: Without dead ends: 1164 [2020-12-22 06:22:29,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:22:29,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2020-12-22 06:22:29,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1081. [2020-12-22 06:22:29,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1081 states. [2020-12-22 06:22:29,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1929 transitions. [2020-12-22 06:22:29,304 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1929 transitions. Word has length 55 [2020-12-22 06:22:29,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:22:29,304 INFO L481 AbstractCegarLoop]: Abstraction has 1081 states and 1929 transitions. [2020-12-22 06:22:29,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:22:29,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1929 transitions. [2020-12-22 06:22:29,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 06:22:29,306 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:22:29,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:22:29,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-22 06:22:29,521 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:22:29,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:22:29,522 INFO L82 PathProgramCache]: Analyzing trace with hash 381028871, now seen corresponding path program 1 times [2020-12-22 06:22:29,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:22:29,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035608301] [2020-12-22 06:22:29,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:22:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:22:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:22:29,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035608301] [2020-12-22 06:22:29,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:22:29,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:22:29,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319847986] [2020-12-22 06:22:29,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:22:29,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:22:29,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:22:29,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:22:29,641 INFO L87 Difference]: Start difference. First operand 1081 states and 1929 transitions. Second operand 3 states. [2020-12-22 06:22:29,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:22:29,788 INFO L93 Difference]: Finished difference Result 2873 states and 5154 transitions. [2020-12-22 06:22:29,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:22:29,788 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2020-12-22 06:22:29,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:22:29,800 INFO L225 Difference]: With dead ends: 2873 [2020-12-22 06:22:29,800 INFO L226 Difference]: Without dead ends: 1893 [2020-12-22 06:22:29,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:22:29,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2020-12-22 06:22:29,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1813. [2020-12-22 06:22:29,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1813 states. [2020-12-22 06:22:29,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 3262 transitions. [2020-12-22 06:22:29,955 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 3262 transitions. Word has length 59 [2020-12-22 06:22:29,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:22:29,957 INFO L481 AbstractCegarLoop]: Abstraction has 1813 states and 3262 transitions. [2020-12-22 06:22:29,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:22:29,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 3262 transitions. [2020-12-22 06:22:29,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 06:22:29,960 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:22:29,960 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:22:29,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:22:29,961 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:22:29,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:22:29,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1949337479, now seen corresponding path program 1 times [2020-12-22 06:22:29,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:22:29,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074875211] [2020-12-22 06:22:29,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:22:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:22:30,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:22:30,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074875211] [2020-12-22 06:22:30,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:22:30,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:22:30,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315616908] [2020-12-22 06:22:30,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:22:30,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:22:30,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:22:30,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:22:30,063 INFO L87 Difference]: Start difference. First operand 1813 states and 3262 transitions. Second operand 3 states. [2020-12-22 06:22:30,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:22:30,279 INFO L93 Difference]: Finished difference Result 4805 states and 8672 transitions. [2020-12-22 06:22:30,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:22:30,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-12-22 06:22:30,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:22:30,298 INFO L225 Difference]: With dead ends: 4805 [2020-12-22 06:22:30,298 INFO L226 Difference]: Without dead ends: 3127 [2020-12-22 06:22:30,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:22:30,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3127 states. [2020-12-22 06:22:30,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3127 to 3047. [2020-12-22 06:22:30,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3047 states. [2020-12-22 06:22:30,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3047 states to 3047 states and 5503 transitions. [2020-12-22 06:22:30,509 INFO L78 Accepts]: Start accepts. Automaton has 3047 states and 5503 transitions. Word has length 60 [2020-12-22 06:22:30,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:22:30,509 INFO L481 AbstractCegarLoop]: Abstraction has 3047 states and 5503 transitions. [2020-12-22 06:22:30,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:22:30,509 INFO L276 IsEmpty]: Start isEmpty. Operand 3047 states and 5503 transitions. [2020-12-22 06:22:30,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 06:22:30,513 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:22:30,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:22:30,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 06:22:30,513 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:22:30,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:22:30,514 INFO L82 PathProgramCache]: Analyzing trace with hash 188142840, now seen corresponding path program 1 times [2020-12-22 06:22:30,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:22:30,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31249079] [2020-12-22 06:22:30,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:22:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:22:30,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:22:30,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31249079] [2020-12-22 06:22:30,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:22:30,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:22:30,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675982410] [2020-12-22 06:22:30,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:22:30,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:22:30,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:22:30,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:22:30,581 INFO L87 Difference]: Start difference. First operand 3047 states and 5503 transitions. Second operand 3 states. [2020-12-22 06:22:30,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:22:30,923 INFO L93 Difference]: Finished difference Result 8223 states and 14878 transitions. [2020-12-22 06:22:30,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:22:30,924 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 06:22:30,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:22:30,959 INFO L225 Difference]: With dead ends: 8223 [2020-12-22 06:22:30,959 INFO L226 Difference]: Without dead ends: 5345 [2020-12-22 06:22:30,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:22:30,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5345 states. [2020-12-22 06:22:31,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5345 to 5265. [2020-12-22 06:22:31,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5265 states. [2020-12-22 06:22:31,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5265 states to 5265 states and 9520 transitions. [2020-12-22 06:22:31,412 INFO L78 Accepts]: Start accepts. Automaton has 5265 states and 9520 transitions. Word has length 61 [2020-12-22 06:22:31,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:22:31,413 INFO L481 AbstractCegarLoop]: Abstraction has 5265 states and 9520 transitions. [2020-12-22 06:22:31,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:22:31,413 INFO L276 IsEmpty]: Start isEmpty. Operand 5265 states and 9520 transitions. [2020-12-22 06:22:31,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 06:22:31,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:22:31,417 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:22:31,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:22:31,417 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:22:31,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:22:31,418 INFO L82 PathProgramCache]: Analyzing trace with hash -845997736, now seen corresponding path program 1 times [2020-12-22 06:22:31,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:22:31,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453409322] [2020-12-22 06:22:31,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:22:31,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:22:31,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:22:31,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453409322] [2020-12-22 06:22:31,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:22:31,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:22:31,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705279086] [2020-12-22 06:22:31,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:22:31,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:22:31,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:22:31,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:22:31,488 INFO L87 Difference]: Start difference. First operand 5265 states and 9520 transitions. Second operand 3 states. [2020-12-22 06:22:32,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:22:32,037 INFO L93 Difference]: Finished difference Result 15203 states and 27540 transitions. [2020-12-22 06:22:32,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:22:32,037 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 06:22:32,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:22:32,090 INFO L225 Difference]: With dead ends: 15203 [2020-12-22 06:22:32,090 INFO L226 Difference]: Without dead ends: 10115 [2020-12-22 06:22:32,102 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 06:22:32,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10115 states. [2020-12-22 06:22:32,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10115 to 10035. [2020-12-22 06:22:32,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10035 states. [2020-12-22 06:22:32,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10035 states to 10035 states and 18161 transitions. [2020-12-22 06:22:32,842 INFO L78 Accepts]: Start accepts. Automaton has 10035 states and 18161 transitions. Word has length 62 [2020-12-22 06:22:32,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:22:32,842 INFO L481 AbstractCegarLoop]: Abstraction has 10035 states and 18161 transitions. [2020-12-22 06:22:32,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:22:32,842 INFO L276 IsEmpty]: Start isEmpty. Operand 10035 states and 18161 transitions. [2020-12-22 06:22:32,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 06:22:32,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:22:32,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:22:32,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 06:22:32,848 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:22:32,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:22:32,849 INFO L82 PathProgramCache]: Analyzing trace with hash 412271399, now seen corresponding path program 1 times [2020-12-22 06:22:32,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:22:32,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857307600] [2020-12-22 06:22:32,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:22:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:22:32,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:22:32,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857307600] [2020-12-22 06:22:32,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:22:32,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:22:32,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639925240] [2020-12-22 06:22:32,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:22:32,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:22:32,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:22:32,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:22:32,925 INFO L87 Difference]: Start difference. First operand 10035 states and 18161 transitions. Second operand 3 states. [2020-12-22 06:22:33,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:22:33,995 INFO L93 Difference]: Finished difference Result 29343 states and 53162 transitions. [2020-12-22 06:22:33,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:22:33,996 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 06:22:33,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:22:34,064 INFO L225 Difference]: With dead ends: 29343 [2020-12-22 06:22:34,065 INFO L226 Difference]: Without dead ends: 19493 [2020-12-22 06:22:34,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:22:34,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19493 states. [2020-12-22 06:22:35,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19493 to 19413. [2020-12-22 06:22:35,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19413 states. [2020-12-22 06:22:35,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19413 states to 19413 states and 35122 transitions. [2020-12-22 06:22:35,284 INFO L78 Accepts]: Start accepts. Automaton has 19413 states and 35122 transitions. Word has length 63 [2020-12-22 06:22:35,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:22:35,285 INFO L481 AbstractCegarLoop]: Abstraction has 19413 states and 35122 transitions. [2020-12-22 06:22:35,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:22:35,285 INFO L276 IsEmpty]: Start isEmpty. Operand 19413 states and 35122 transitions. [2020-12-22 06:22:35,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 06:22:35,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:22:35,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:22:35,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 06:22:35,294 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:22:35,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:22:35,294 INFO L82 PathProgramCache]: Analyzing trace with hash 146900455, now seen corresponding path program 1 times [2020-12-22 06:22:35,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:22:35,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728014916] [2020-12-22 06:22:35,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:22:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:22:35,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:22:35,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728014916] [2020-12-22 06:22:35,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:22:35,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:22:35,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869191325] [2020-12-22 06:22:35,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:22:35,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:22:35,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:22:35,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:22:35,365 INFO L87 Difference]: Start difference. First operand 19413 states and 35122 transitions. Second operand 3 states. [2020-12-22 06:22:37,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:22:37,216 INFO L93 Difference]: Finished difference Result 57663 states and 104359 transitions. [2020-12-22 06:22:37,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:22:37,217 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 06:22:37,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:22:37,344 INFO L225 Difference]: With dead ends: 57663 [2020-12-22 06:22:37,345 INFO L226 Difference]: Without dead ends: 38439 [2020-12-22 06:22:37,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:22:37,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38439 states. [2020-12-22 06:22:40,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38439 to 38359. [2020-12-22 06:22:40,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38359 states. [2020-12-22 06:22:40,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38359 states to 38359 states and 69299 transitions. [2020-12-22 06:22:40,124 INFO L78 Accepts]: Start accepts. Automaton has 38359 states and 69299 transitions. Word has length 64 [2020-12-22 06:22:40,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:22:40,124 INFO L481 AbstractCegarLoop]: Abstraction has 38359 states and 69299 transitions. [2020-12-22 06:22:40,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:22:40,125 INFO L276 IsEmpty]: Start isEmpty. Operand 38359 states and 69299 transitions. [2020-12-22 06:22:40,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 06:22:40,133 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:22:40,133 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-12-22 06:22:40,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 06:22:40,134 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:22:40,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:22:40,134 INFO L82 PathProgramCache]: Analyzing trace with hash -623212146, now seen corresponding path program 1 times [2020-12-22 06:22:40,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:22:40,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387349831] [2020-12-22 06:22:40,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:22:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:22:40,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 06:22:40,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387349831] [2020-12-22 06:22:40,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:22:40,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:22:40,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610726637] [2020-12-22 06:22:40,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:22:40,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:22:40,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:22:40,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:22:40,228 INFO L87 Difference]: Start difference. First operand 38359 states and 69299 transitions. Second operand 5 states. [2020-12-22 06:22:43,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:22:43,219 INFO L93 Difference]: Finished difference Result 112772 states and 203696 transitions. [2020-12-22 06:22:43,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:22:43,220 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-12-22 06:22:43,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:22:43,435 INFO L225 Difference]: With dead ends: 112772 [2020-12-22 06:22:43,435 INFO L226 Difference]: Without dead ends: 74670 [2020-12-22 06:22:43,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:22:43,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74670 states. [2020-12-22 06:22:46,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74670 to 38359. [2020-12-22 06:22:46,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38359 states. [2020-12-22 06:22:46,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38359 states to 38359 states and 69041 transitions. [2020-12-22 06:22:46,458 INFO L78 Accepts]: Start accepts. Automaton has 38359 states and 69041 transitions. Word has length 65 [2020-12-22 06:22:46,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:22:46,458 INFO L481 AbstractCegarLoop]: Abstraction has 38359 states and 69041 transitions. [2020-12-22 06:22:46,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:22:46,458 INFO L276 IsEmpty]: Start isEmpty. Operand 38359 states and 69041 transitions. [2020-12-22 06:22:46,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 06:22:46,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:22:46,464 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 06:22:46,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 06:22:46,465 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:22:46,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:22:46,466 INFO L82 PathProgramCache]: Analyzing trace with hash -935154516, now seen corresponding path program 2 times [2020-12-22 06:22:46,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:22:46,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903911339] [2020-12-22 06:22:46,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:22:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:22:46,539 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 06:22:46,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903911339] [2020-12-22 06:22:46,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:22:46,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:22:46,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158284267] [2020-12-22 06:22:46,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:22:46,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:22:46,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:22:46,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:22:46,542 INFO L87 Difference]: Start difference. First operand 38359 states and 69041 transitions. Second operand 5 states. [2020-12-22 06:22:48,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:22:48,565 INFO L93 Difference]: Finished difference Result 76535 states and 137761 transitions. [2020-12-22 06:22:48,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:22:48,566 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-12-22 06:22:48,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:22:48,651 INFO L225 Difference]: With dead ends: 76535 [2020-12-22 06:22:48,651 INFO L226 Difference]: Without dead ends: 38439 [2020-12-22 06:22:48,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:22:48,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38439 states. [2020-12-22 06:22:50,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38439 to 38359. [2020-12-22 06:22:50,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38359 states. [2020-12-22 06:22:50,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38359 states to 38359 states and 68913 transitions. [2020-12-22 06:22:50,629 INFO L78 Accepts]: Start accepts. Automaton has 38359 states and 68913 transitions. Word has length 65 [2020-12-22 06:22:50,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:22:50,629 INFO L481 AbstractCegarLoop]: Abstraction has 38359 states and 68913 transitions. [2020-12-22 06:22:50,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:22:50,630 INFO L276 IsEmpty]: Start isEmpty. Operand 38359 states and 68913 transitions. [2020-12-22 06:22:50,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 06:22:50,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:22:50,635 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:22:50,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 06:22:50,636 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:22:50,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:22:50,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1725324391, now seen corresponding path program 1 times [2020-12-22 06:22:50,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:22:50,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374140219] [2020-12-22 06:22:50,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:22:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:22:50,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:22:50,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374140219] [2020-12-22 06:22:50,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:22:50,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:22:50,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147456887] [2020-12-22 06:22:50,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:22:50,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:22:50,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:22:50,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:22:50,702 INFO L87 Difference]: Start difference. First operand 38359 states and 68913 transitions. Second operand 3 states. [2020-12-22 06:22:53,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:22:53,527 INFO L93 Difference]: Finished difference Result 106657 states and 191339 transitions. [2020-12-22 06:22:53,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:22:53,528 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 06:22:53,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:22:53,809 INFO L225 Difference]: With dead ends: 106657 [2020-12-22 06:22:53,809 INFO L226 Difference]: Without dead ends: 68521 [2020-12-22 06:22:53,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:22:53,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68521 states. [2020-12-22 06:22:57,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68521 to 68441. [2020-12-22 06:22:57,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68441 states. [2020-12-22 06:22:57,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68441 states to 68441 states and 122418 transitions. [2020-12-22 06:22:57,429 INFO L78 Accepts]: Start accepts. Automaton has 68441 states and 122418 transitions. Word has length 65 [2020-12-22 06:22:57,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:22:57,429 INFO L481 AbstractCegarLoop]: Abstraction has 68441 states and 122418 transitions. [2020-12-22 06:22:57,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:22:57,430 INFO L276 IsEmpty]: Start isEmpty. Operand 68441 states and 122418 transitions. [2020-12-22 06:22:57,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 06:22:57,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:22:57,445 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-12-22 06:22:57,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 06:22:57,445 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:22:57,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:22:57,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1331173874, now seen corresponding path program 1 times [2020-12-22 06:22:57,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:22:57,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257721496] [2020-12-22 06:22:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:22:57,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:22:57,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:22:57,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257721496] [2020-12-22 06:22:57,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:22:57,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 06:22:57,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739352718] [2020-12-22 06:22:57,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 06:22:57,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:22:57,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 06:22:57,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 06:22:57,594 INFO L87 Difference]: Start difference. First operand 68441 states and 122418 transitions. Second operand 10 states. [2020-12-22 06:23:01,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:23:01,484 INFO L93 Difference]: Finished difference Result 68944 states and 123125 transitions. [2020-12-22 06:23:01,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 06:23:01,485 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-12-22 06:23:01,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:23:01,607 INFO L225 Difference]: With dead ends: 68944 [2020-12-22 06:23:01,607 INFO L226 Difference]: Without dead ends: 68886 [2020-12-22 06:23:01,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=290, Invalid=766, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 06:23:01,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68886 states. [2020-12-22 06:23:04,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68886 to 68481. [2020-12-22 06:23:04,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68481 states. [2020-12-22 06:23:04,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68481 states to 68481 states and 122476 transitions. [2020-12-22 06:23:04,912 INFO L78 Accepts]: Start accepts. Automaton has 68481 states and 122476 transitions. Word has length 66 [2020-12-22 06:23:04,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:23:04,912 INFO L481 AbstractCegarLoop]: Abstraction has 68481 states and 122476 transitions. [2020-12-22 06:23:04,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 06:23:04,912 INFO L276 IsEmpty]: Start isEmpty. Operand 68481 states and 122476 transitions. [2020-12-22 06:23:04,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 06:23:04,919 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:23:04,919 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-12-22 06:23:04,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 06:23:04,919 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:23:04,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:23:04,920 INFO L82 PathProgramCache]: Analyzing trace with hash -168771577, now seen corresponding path program 1 times [2020-12-22 06:23:04,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:23:04,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301141541] [2020-12-22 06:23:04,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:23:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:23:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:23:04,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301141541] [2020-12-22 06:23:04,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:23:04,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:23:04,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718055150] [2020-12-22 06:23:05,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:23:05,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:23:05,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:23:05,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:23:05,001 INFO L87 Difference]: Start difference. First operand 68481 states and 122476 transitions. Second operand 4 states. [2020-12-22 06:23:07,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:23:07,647 INFO L93 Difference]: Finished difference Result 68574 states and 122613 transitions. [2020-12-22 06:23:07,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:23:07,649 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-12-22 06:23:07,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:23:07,650 INFO L225 Difference]: With dead ends: 68574 [2020-12-22 06:23:07,650 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 06:23:07,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:23:07,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 06:23:07,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 06:23:07,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 06:23:07,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 06:23:07,689 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 67 [2020-12-22 06:23:07,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:23:07,689 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 06:23:07,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:23:07,689 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 06:23:07,689 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 06:23:07,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 06:23:07,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-22 06:23:07,941 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 115 [2020-12-22 06:23:12,616 WARN L197 SmtUtils]: Spent 4.67 s on a formula simplification. DAG size of input: 1096 DAG size of output: 750 [2020-12-22 06:23:22,492 WARN L197 SmtUtils]: Spent 9.86 s on a formula simplification. DAG size of input: 1352 DAG size of output: 1096 [2020-12-22 06:23:32,348 WARN L197 SmtUtils]: Spent 9.84 s on a formula simplification. DAG size of input: 1352 DAG size of output: 1096 [2020-12-22 06:23:35,362 WARN L197 SmtUtils]: Spent 3.00 s on a formula simplification. DAG size of input: 709 DAG size of output: 699 [2020-12-22 06:23:38,100 WARN L197 SmtUtils]: Spent 2.68 s on a formula simplification. DAG size of input: 712 DAG size of output: 653 [2020-12-22 06:23:40,838 WARN L197 SmtUtils]: Spent 2.68 s on a formula simplification. DAG size of input: 712 DAG size of output: 641 [2020-12-22 06:23:40,984 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 129 [2020-12-22 06:23:50,490 WARN L197 SmtUtils]: Spent 9.50 s on a formula simplification. DAG size of input: 1352 DAG size of output: 1096 [2020-12-22 06:23:59,926 WARN L197 SmtUtils]: Spent 9.35 s on a formula simplification. DAG size of input: 1352 DAG size of output: 1096 [2020-12-22 06:24:00,150 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 126 [2020-12-22 06:24:09,461 WARN L197 SmtUtils]: Spent 9.31 s on a formula simplification. DAG size of input: 1352 DAG size of output: 1096 [2020-12-22 06:24:19,046 WARN L197 SmtUtils]: Spent 9.48 s on a formula simplification. DAG size of input: 1366 DAG size of output: 1110 [2020-12-22 06:24:28,194 WARN L197 SmtUtils]: Spent 9.14 s on a formula simplification. DAG size of input: 1352 DAG size of output: 1096 [2020-12-22 06:24:37,712 WARN L197 SmtUtils]: Spent 9.43 s on a formula simplification. DAG size of input: 1352 DAG size of output: 1096 [2020-12-22 06:24:47,231 WARN L197 SmtUtils]: Spent 9.32 s on a formula simplification. DAG size of input: 1352 DAG size of output: 1096 [2020-12-22 06:24:49,839 WARN L197 SmtUtils]: Spent 2.60 s on a formula simplification. DAG size of input: 712 DAG size of output: 641 [2020-12-22 06:24:59,300 WARN L197 SmtUtils]: Spent 9.42 s on a formula simplification. DAG size of input: 1355 DAG size of output: 1099 [2020-12-22 06:25:01,731 WARN L197 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 1096 DAG size of output: 746 [2020-12-22 06:25:04,081 WARN L197 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 1096 DAG size of output: 750 [2020-12-22 06:25:13,383 WARN L197 SmtUtils]: Spent 9.30 s on a formula simplification. DAG size of input: 1352 DAG size of output: 1096 [2020-12-22 06:25:22,784 WARN L197 SmtUtils]: Spent 9.39 s on a formula simplification. DAG size of input: 1352 DAG size of output: 1096 [2020-12-22 06:25:32,174 WARN L197 SmtUtils]: Spent 9.31 s on a formula simplification. DAG size of input: 1352 DAG size of output: 1096 [2020-12-22 06:25:33,594 WARN L197 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 328 DAG size of output: 320 [2020-12-22 06:25:36,401 WARN L197 SmtUtils]: Spent 2.80 s on a formula simplification. DAG size of input: 709 DAG size of output: 699 [2020-12-22 06:25:39,133 WARN L197 SmtUtils]: Spent 2.73 s on a formula simplification. DAG size of input: 712 DAG size of output: 653 [2020-12-22 06:25:41,872 WARN L197 SmtUtils]: Spent 2.73 s on a formula simplification. DAG size of input: 709 DAG size of output: 699 [2020-12-22 06:25:44,662 WARN L197 SmtUtils]: Spent 2.75 s on a formula simplification. DAG size of input: 712 DAG size of output: 653 [2020-12-22 06:25:47,320 WARN L197 SmtUtils]: Spent 2.65 s on a formula simplification. DAG size of input: 712 DAG size of output: 641 [2020-12-22 06:25:48,732 WARN L197 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 328 DAG size of output: 320 [2020-12-22 06:25:57,987 WARN L197 SmtUtils]: Spent 9.25 s on a formula simplification. DAG size of input: 1352 DAG size of output: 1096 [2020-12-22 06:26:00,770 WARN L197 SmtUtils]: Spent 2.78 s on a formula simplification. DAG size of input: 709 DAG size of output: 699 [2020-12-22 06:26:03,530 WARN L197 SmtUtils]: Spent 2.75 s on a formula simplification. DAG size of input: 709 DAG size of output: 699 [2020-12-22 06:26:06,349 WARN L197 SmtUtils]: Spent 2.74 s on a formula simplification. DAG size of input: 712 DAG size of output: 653 [2020-12-22 06:26:09,027 WARN L197 SmtUtils]: Spent 2.67 s on a formula simplification. DAG size of input: 712 DAG size of output: 641 [2020-12-22 06:26:11,790 WARN L197 SmtUtils]: Spent 2.76 s on a formula simplification. DAG size of input: 709 DAG size of output: 699 [2020-12-22 06:26:14,226 WARN L197 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 1096 DAG size of output: 750 [2020-12-22 06:26:23,596 WARN L197 SmtUtils]: Spent 9.36 s on a formula simplification. DAG size of input: 1352 DAG size of output: 1096 [2020-12-22 06:26:26,532 WARN L197 SmtUtils]: Spent 2.76 s on a formula simplification. DAG size of input: 712 DAG size of output: 641 [2020-12-22 06:26:28,959 WARN L197 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 1096 DAG size of output: 754 [2020-12-22 06:26:31,590 WARN L197 SmtUtils]: Spent 2.63 s on a formula simplification. DAG size of input: 705 DAG size of output: 694