/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:05:21,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:05:21,015 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:05:21,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:05:21,059 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:05:21,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:05:21,063 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:05:21,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:05:21,067 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:05:21,069 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:05:21,070 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:05:21,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:05:21,072 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:05:21,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:05:21,075 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:05:21,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:05:21,077 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:05:21,078 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:05:21,088 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:05:21,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:05:21,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:05:21,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:05:21,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:05:21,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:05:21,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:05:21,106 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:05:21,107 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:05:21,108 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:05:21,109 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:05:21,110 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:05:21,110 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:05:21,111 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:05:21,112 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:05:21,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:05:21,114 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:05:21,114 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:05:21,116 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:05:21,145 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:05:21,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:05:21,147 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:05:21,147 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:05:21,148 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:05:21,148 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:05:21,148 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:05:21,148 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:05:21,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:05:21,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:05:21,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:05:21,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:05:21,150 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:05:21,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:05:21,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:05:21,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:05:21,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:05:21,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:05:21,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:05:21,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:05:21,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:05:21,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:05:21,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:05:21,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:05:21,153 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:05:21,153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:05:21,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:05:21,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:05:21,597 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:05:21,598 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:05:21,599 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:05:21,600 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c [2020-12-22 06:05:21,703 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ace6920e0/db42eaa784024f8aa7c2265edd5fa7c7/FLAG5dce0ff40 [2020-12-22 06:05:22,603 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:05:22,604 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c [2020-12-22 06:05:22,639 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ace6920e0/db42eaa784024f8aa7c2265edd5fa7c7/FLAG5dce0ff40 [2020-12-22 06:05:22,801 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ace6920e0/db42eaa784024f8aa7c2265edd5fa7c7 [2020-12-22 06:05:22,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:05:22,809 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:05:22,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:05:22,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:05:22,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:05:22,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:05:22" (1/1) ... [2020-12-22 06:05:22,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c76af24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:05:22, skipping insertion in model container [2020-12-22 06:05:22,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:05:22" (1/1) ... [2020-12-22 06:05:22,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:05:22,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:05:23,631 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c[39747,39760] [2020-12-22 06:05:23,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:05:23,766 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:05:23,831 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c[39747,39760] [2020-12-22 06:05:23,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:05:23,957 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:05:23,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:05:23 WrapperNode [2020-12-22 06:05:23,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:05:23,959 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:05:23,959 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:05:23,959 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:05:23,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:05:23" (1/1) ... [2020-12-22 06:05:24,004 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:05:23" (1/1) ... [2020-12-22 06:05:24,302 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:05:24,305 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:05:24,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:05:24,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:05:24,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:05:23" (1/1) ... [2020-12-22 06:05:24,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:05:23" (1/1) ... [2020-12-22 06:05:24,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:05:23" (1/1) ... [2020-12-22 06:05:24,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:05:23" (1/1) ... [2020-12-22 06:05:24,472 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:05:23" (1/1) ... [2020-12-22 06:05:24,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:05:23" (1/1) ... [2020-12-22 06:05:24,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:05:23" (1/1) ... [2020-12-22 06:05:24,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:05:24,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:05:24,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:05:24,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:05:24,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:05:23" (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 06:05:24,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:05:24,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:05:24,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:05:24,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:05:32,981 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:05:32,982 INFO L299 CfgBuilder]: Removed 773 assume(true) statements. [2020-12-22 06:05:32,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:05:32 BoogieIcfgContainer [2020-12-22 06:05:32,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:05:32,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:05:32,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:05:32,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:05:32,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:05:22" (1/3) ... [2020-12-22 06:05:32,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@678980c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:05:32, skipping insertion in model container [2020-12-22 06:05:32,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:05:23" (2/3) ... [2020-12-22 06:05:32,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@678980c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:05:32, skipping insertion in model container [2020-12-22 06:05:32,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:05:32" (3/3) ... [2020-12-22 06:05:33,001 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product21.cil.c [2020-12-22 06:05:33,010 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:05:33,032 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-22 06:05:33,056 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-22 06:05:33,101 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:05:33,101 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:05:33,101 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:05:33,101 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:05:33,101 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:05:33,101 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:05:33,102 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:05:33,102 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:05:33,169 INFO L276 IsEmpty]: Start isEmpty. Operand 3458 states. [2020-12-22 06:05:33,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 06:05:33,193 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:33,194 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 06:05:33,195 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:05:33,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:33,201 INFO L82 PathProgramCache]: Analyzing trace with hash 769548685, now seen corresponding path program 1 times [2020-12-22 06:05:33,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:33,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472055894] [2020-12-22 06:05:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:33,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:05:33,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472055894] [2020-12-22 06:05:33,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:33,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:05:33,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983703920] [2020-12-22 06:05:33,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:05:33,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:33,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:05:33,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:05:33,714 INFO L87 Difference]: Start difference. First operand 3458 states. Second operand 3 states. [2020-12-22 06:05:33,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:33,979 INFO L93 Difference]: Finished difference Result 6907 states and 13069 transitions. [2020-12-22 06:05:33,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:05:33,981 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 06:05:33,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:34,041 INFO L225 Difference]: With dead ends: 6907 [2020-12-22 06:05:34,045 INFO L226 Difference]: Without dead ends: 3454 [2020-12-22 06:05:34,063 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 06:05:34,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3454 states. [2020-12-22 06:05:34,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3454 to 3454. [2020-12-22 06:05:34,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3454 states. [2020-12-22 06:05:34,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 6525 transitions. [2020-12-22 06:05:34,294 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 6525 transitions. Word has length 43 [2020-12-22 06:05:34,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:34,295 INFO L481 AbstractCegarLoop]: Abstraction has 3454 states and 6525 transitions. [2020-12-22 06:05:34,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:05:34,296 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 6525 transitions. [2020-12-22 06:05:34,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 06:05:34,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:34,301 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:05:34,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:05:34,302 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:05:34,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:34,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1200800142, now seen corresponding path program 1 times [2020-12-22 06:05:34,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:34,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681837451] [2020-12-22 06:05:34,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:05:34,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681837451] [2020-12-22 06:05:34,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:34,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:05:34,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802715609] [2020-12-22 06:05:34,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:05:34,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:34,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:05:34,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:05:34,531 INFO L87 Difference]: Start difference. First operand 3454 states and 6525 transitions. Second operand 6 states. [2020-12-22 06:05:34,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:34,883 INFO L93 Difference]: Finished difference Result 6859 states and 12966 transitions. [2020-12-22 06:05:34,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:05:34,884 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 50 [2020-12-22 06:05:34,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:34,908 INFO L225 Difference]: With dead ends: 6859 [2020-12-22 06:05:34,909 INFO L226 Difference]: Without dead ends: 3448 [2020-12-22 06:05:34,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:05:34,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3448 states. [2020-12-22 06:05:35,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3448 to 3448. [2020-12-22 06:05:35,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3448 states. [2020-12-22 06:05:35,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3448 states to 3448 states and 6512 transitions. [2020-12-22 06:05:35,234 INFO L78 Accepts]: Start accepts. Automaton has 3448 states and 6512 transitions. Word has length 50 [2020-12-22 06:05:35,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:35,234 INFO L481 AbstractCegarLoop]: Abstraction has 3448 states and 6512 transitions. [2020-12-22 06:05:35,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:05:35,234 INFO L276 IsEmpty]: Start isEmpty. Operand 3448 states and 6512 transitions. [2020-12-22 06:05:35,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 06:05:35,241 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:35,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:05:35,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:05:35,243 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:05:35,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:35,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1421538448, now seen corresponding path program 1 times [2020-12-22 06:05:35,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:35,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476264713] [2020-12-22 06:05:35,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:35,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:05:35,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476264713] [2020-12-22 06:05:35,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:35,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:05:35,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581254500] [2020-12-22 06:05:35,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:05:35,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:35,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:05:35,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:05:35,423 INFO L87 Difference]: Start difference. First operand 3448 states and 6512 transitions. Second operand 4 states. [2020-12-22 06:05:35,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:35,744 INFO L93 Difference]: Finished difference Result 6853 states and 12953 transitions. [2020-12-22 06:05:35,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:05:35,745 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-12-22 06:05:35,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:35,766 INFO L225 Difference]: With dead ends: 6853 [2020-12-22 06:05:35,766 INFO L226 Difference]: Without dead ends: 3448 [2020-12-22 06:05:35,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:05:35,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3448 states. [2020-12-22 06:05:35,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3448 to 3448. [2020-12-22 06:05:35,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3448 states. [2020-12-22 06:05:35,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3448 states to 3448 states and 6508 transitions. [2020-12-22 06:05:35,924 INFO L78 Accepts]: Start accepts. Automaton has 3448 states and 6508 transitions. Word has length 51 [2020-12-22 06:05:35,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:35,931 INFO L481 AbstractCegarLoop]: Abstraction has 3448 states and 6508 transitions. [2020-12-22 06:05:35,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:05:35,932 INFO L276 IsEmpty]: Start isEmpty. Operand 3448 states and 6508 transitions. [2020-12-22 06:05:35,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 06:05:35,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:35,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:05:35,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:05:35,938 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:05:35,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:35,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1474975275, now seen corresponding path program 1 times [2020-12-22 06:05:35,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:35,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181090344] [2020-12-22 06:05:35,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:36,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:05:36,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181090344] [2020-12-22 06:05:36,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:36,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:05:36,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426280469] [2020-12-22 06:05:36,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:05:36,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:36,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:05:36,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:05:36,072 INFO L87 Difference]: Start difference. First operand 3448 states and 6508 transitions. Second operand 4 states. [2020-12-22 06:05:36,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:36,340 INFO L93 Difference]: Finished difference Result 6853 states and 12949 transitions. [2020-12-22 06:05:36,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:05:36,341 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-12-22 06:05:36,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:36,362 INFO L225 Difference]: With dead ends: 6853 [2020-12-22 06:05:36,362 INFO L226 Difference]: Without dead ends: 3448 [2020-12-22 06:05:36,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:05:36,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3448 states. [2020-12-22 06:05:36,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3448 to 3448. [2020-12-22 06:05:36,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3448 states. [2020-12-22 06:05:36,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3448 states to 3448 states and 6504 transitions. [2020-12-22 06:05:36,676 INFO L78 Accepts]: Start accepts. Automaton has 3448 states and 6504 transitions. Word has length 52 [2020-12-22 06:05:36,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:36,677 INFO L481 AbstractCegarLoop]: Abstraction has 3448 states and 6504 transitions. [2020-12-22 06:05:36,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:05:36,677 INFO L276 IsEmpty]: Start isEmpty. Operand 3448 states and 6504 transitions. [2020-12-22 06:05:36,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 06:05:36,681 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:36,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:05:36,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:05:36,684 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:05:36,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:36,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1035117579, now seen corresponding path program 1 times [2020-12-22 06:05:36,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:36,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268134086] [2020-12-22 06:05:36,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:05:36,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268134086] [2020-12-22 06:05:36,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:36,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:05:36,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054346258] [2020-12-22 06:05:36,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:05:36,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:36,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:05:36,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:05:36,807 INFO L87 Difference]: Start difference. First operand 3448 states and 6504 transitions. Second operand 4 states. [2020-12-22 06:05:37,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:37,081 INFO L93 Difference]: Finished difference Result 6853 states and 12945 transitions. [2020-12-22 06:05:37,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:05:37,084 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-12-22 06:05:37,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:37,107 INFO L225 Difference]: With dead ends: 6853 [2020-12-22 06:05:37,107 INFO L226 Difference]: Without dead ends: 3448 [2020-12-22 06:05:37,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:05:37,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3448 states. [2020-12-22 06:05:37,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3448 to 3448. [2020-12-22 06:05:37,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3448 states. [2020-12-22 06:05:37,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3448 states to 3448 states and 6500 transitions. [2020-12-22 06:05:37,294 INFO L78 Accepts]: Start accepts. Automaton has 3448 states and 6500 transitions. Word has length 53 [2020-12-22 06:05:37,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:37,294 INFO L481 AbstractCegarLoop]: Abstraction has 3448 states and 6500 transitions. [2020-12-22 06:05:37,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:05:37,295 INFO L276 IsEmpty]: Start isEmpty. Operand 3448 states and 6500 transitions. [2020-12-22 06:05:37,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 06:05:37,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:37,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:05:37,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:05:37,301 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:05:37,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:37,301 INFO L82 PathProgramCache]: Analyzing trace with hash -943835019, now seen corresponding path program 1 times [2020-12-22 06:05:37,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:37,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343592025] [2020-12-22 06:05:37,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:37,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:37,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:05:37,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343592025] [2020-12-22 06:05:37,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:37,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:05:37,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407331723] [2020-12-22 06:05:37,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:05:37,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:37,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:05:37,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:05:37,432 INFO L87 Difference]: Start difference. First operand 3448 states and 6500 transitions. Second operand 4 states. [2020-12-22 06:05:37,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:37,642 INFO L93 Difference]: Finished difference Result 6853 states and 12941 transitions. [2020-12-22 06:05:37,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:05:37,643 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-12-22 06:05:37,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:37,662 INFO L225 Difference]: With dead ends: 6853 [2020-12-22 06:05:37,662 INFO L226 Difference]: Without dead ends: 3427 [2020-12-22 06:05:37,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:05:37,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3427 states. [2020-12-22 06:05:37,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3427 to 3427. [2020-12-22 06:05:37,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3427 states. [2020-12-22 06:05:37,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 6466 transitions. [2020-12-22 06:05:37,927 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 6466 transitions. Word has length 53 [2020-12-22 06:05:37,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:37,928 INFO L481 AbstractCegarLoop]: Abstraction has 3427 states and 6466 transitions. [2020-12-22 06:05:37,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:05:37,928 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 6466 transitions. [2020-12-22 06:05:37,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 06:05:37,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:37,932 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] [2020-12-22 06:05:37,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:05:37,932 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:05:37,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:37,937 INFO L82 PathProgramCache]: Analyzing trace with hash -246960998, now seen corresponding path program 1 times [2020-12-22 06:05:37,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:37,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916301710] [2020-12-22 06:05:37,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:37,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:05:38,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916301710] [2020-12-22 06:05:38,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:38,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:05:38,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884868871] [2020-12-22 06:05:38,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:05:38,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:38,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:05:38,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:05:38,038 INFO L87 Difference]: Start difference. First operand 3427 states and 6466 transitions. Second operand 4 states. [2020-12-22 06:05:38,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:38,234 INFO L93 Difference]: Finished difference Result 6832 states and 12907 transitions. [2020-12-22 06:05:38,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:05:38,234 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-12-22 06:05:38,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:38,269 INFO L225 Difference]: With dead ends: 6832 [2020-12-22 06:05:38,270 INFO L226 Difference]: Without dead ends: 3427 [2020-12-22 06:05:38,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:05:38,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3427 states. [2020-12-22 06:05:38,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3427 to 3427. [2020-12-22 06:05:38,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3427 states. [2020-12-22 06:05:38,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 6465 transitions. [2020-12-22 06:05:38,423 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 6465 transitions. Word has length 54 [2020-12-22 06:05:38,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:38,424 INFO L481 AbstractCegarLoop]: Abstraction has 3427 states and 6465 transitions. [2020-12-22 06:05:38,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:05:38,424 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 6465 transitions. [2020-12-22 06:05:38,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 06:05:38,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:38,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:05:38,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:05:38,430 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:05:38,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:38,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1546440870, now seen corresponding path program 1 times [2020-12-22 06:05:38,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:38,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098323759] [2020-12-22 06:05:38,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:38,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:05:38,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098323759] [2020-12-22 06:05:38,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:38,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:05:38,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16574260] [2020-12-22 06:05:38,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:05:38,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:38,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:05:38,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:05:38,527 INFO L87 Difference]: Start difference. First operand 3427 states and 6465 transitions. Second operand 4 states. [2020-12-22 06:05:38,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:38,731 INFO L93 Difference]: Finished difference Result 6832 states and 12906 transitions. [2020-12-22 06:05:38,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:05:38,731 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-12-22 06:05:38,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:38,745 INFO L225 Difference]: With dead ends: 6832 [2020-12-22 06:05:38,745 INFO L226 Difference]: Without dead ends: 3427 [2020-12-22 06:05:38,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:05:38,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3427 states. [2020-12-22 06:05:38,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3427 to 3427. [2020-12-22 06:05:38,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3427 states. [2020-12-22 06:05:38,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 6464 transitions. [2020-12-22 06:05:38,887 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 6464 transitions. Word has length 55 [2020-12-22 06:05:38,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:38,887 INFO L481 AbstractCegarLoop]: Abstraction has 3427 states and 6464 transitions. [2020-12-22 06:05:38,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:05:38,888 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 6464 transitions. [2020-12-22 06:05:38,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 06:05:38,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:38,891 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] [2020-12-22 06:05:38,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:05:38,891 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:05:38,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:38,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1156825951, now seen corresponding path program 1 times [2020-12-22 06:05:38,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:38,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971009412] [2020-12-22 06:05:38,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:38,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:38,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:05:38,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971009412] [2020-12-22 06:05:38,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:38,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:05:38,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883994531] [2020-12-22 06:05:38,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:05:38,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:38,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:05:38,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:05:38,986 INFO L87 Difference]: Start difference. First operand 3427 states and 6464 transitions. Second operand 7 states. [2020-12-22 06:05:39,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:39,323 INFO L93 Difference]: Finished difference Result 6826 states and 12894 transitions. [2020-12-22 06:05:39,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:05:39,324 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-12-22 06:05:39,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:39,335 INFO L225 Difference]: With dead ends: 6826 [2020-12-22 06:05:39,336 INFO L226 Difference]: Without dead ends: 3427 [2020-12-22 06:05:39,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-22 06:05:39,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3427 states. [2020-12-22 06:05:39,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3427 to 3427. [2020-12-22 06:05:39,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3427 states. [2020-12-22 06:05:39,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 6463 transitions. [2020-12-22 06:05:39,537 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 6463 transitions. Word has length 56 [2020-12-22 06:05:39,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:39,538 INFO L481 AbstractCegarLoop]: Abstraction has 3427 states and 6463 transitions. [2020-12-22 06:05:39,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:05:39,539 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 6463 transitions. [2020-12-22 06:05:39,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 06:05:39,542 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:39,542 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:05:39,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 06:05:39,543 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:05:39,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:39,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1181031537, now seen corresponding path program 1 times [2020-12-22 06:05:39,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:39,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787094757] [2020-12-22 06:05:39,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:39,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:05:39,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787094757] [2020-12-22 06:05:39,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:39,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:05:39,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577553612] [2020-12-22 06:05:39,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:05:39,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:39,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:05:39,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:05:39,643 INFO L87 Difference]: Start difference. First operand 3427 states and 6463 transitions. Second operand 3 states. [2020-12-22 06:05:40,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:40,061 INFO L93 Difference]: Finished difference Result 8271 states and 15614 transitions. [2020-12-22 06:05:40,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:05:40,062 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-12-22 06:05:40,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:40,077 INFO L225 Difference]: With dead ends: 8271 [2020-12-22 06:05:40,077 INFO L226 Difference]: Without dead ends: 5733 [2020-12-22 06:05:40,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:05:40,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5733 states. [2020-12-22 06:05:40,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5733 to 5718. [2020-12-22 06:05:40,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5718 states. [2020-12-22 06:05:40,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5718 states to 5718 states and 10781 transitions. [2020-12-22 06:05:40,304 INFO L78 Accepts]: Start accepts. Automaton has 5718 states and 10781 transitions. Word has length 57 [2020-12-22 06:05:40,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:40,305 INFO L481 AbstractCegarLoop]: Abstraction has 5718 states and 10781 transitions. [2020-12-22 06:05:40,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:05:40,305 INFO L276 IsEmpty]: Start isEmpty. Operand 5718 states and 10781 transitions. [2020-12-22 06:05:40,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 06:05:40,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:40,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:05:40,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:05:40,309 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:05:40,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:40,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1575331204, now seen corresponding path program 1 times [2020-12-22 06:05:40,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:40,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756101553] [2020-12-22 06:05:40,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:05:40,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756101553] [2020-12-22 06:05:40,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:40,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:05:40,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095836209] [2020-12-22 06:05:40,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:05:40,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:40,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:05:40,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:05:40,399 INFO L87 Difference]: Start difference. First operand 5718 states and 10781 transitions. Second operand 3 states. [2020-12-22 06:05:40,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:40,874 INFO L93 Difference]: Finished difference Result 14426 states and 27213 transitions. [2020-12-22 06:05:40,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:05:40,875 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2020-12-22 06:05:40,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:40,906 INFO L225 Difference]: With dead ends: 14426 [2020-12-22 06:05:40,906 INFO L226 Difference]: Without dead ends: 10212 [2020-12-22 06:05:40,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:05:40,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10212 states. [2020-12-22 06:05:41,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10212 to 10197. [2020-12-22 06:05:41,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10197 states. [2020-12-22 06:05:41,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10197 states to 10197 states and 19221 transitions. [2020-12-22 06:05:41,330 INFO L78 Accepts]: Start accepts. Automaton has 10197 states and 19221 transitions. Word has length 58 [2020-12-22 06:05:41,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:41,331 INFO L481 AbstractCegarLoop]: Abstraction has 10197 states and 19221 transitions. [2020-12-22 06:05:41,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:05:41,331 INFO L276 IsEmpty]: Start isEmpty. Operand 10197 states and 19221 transitions. [2020-12-22 06:05:41,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 06:05:41,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:41,341 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 06:05:41,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 06:05:41,341 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:05:41,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:41,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1015136116, now seen corresponding path program 1 times [2020-12-22 06:05:41,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:41,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470679912] [2020-12-22 06:05:41,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:41,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:05:41,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470679912] [2020-12-22 06:05:41,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:41,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:05:41,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860017875] [2020-12-22 06:05:41,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:05:41,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:41,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:05:41,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:05:41,421 INFO L87 Difference]: Start difference. First operand 10197 states and 19221 transitions. Second operand 3 states. [2020-12-22 06:05:42,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:42,149 INFO L93 Difference]: Finished difference Result 26530 states and 50006 transitions. [2020-12-22 06:05:42,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:05:42,150 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2020-12-22 06:05:42,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:42,205 INFO L225 Difference]: With dead ends: 26530 [2020-12-22 06:05:42,206 INFO L226 Difference]: Without dead ends: 18954 [2020-12-22 06:05:42,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:05:42,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18954 states. [2020-12-22 06:05:42,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18954 to 18939. [2020-12-22 06:05:42,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18939 states. [2020-12-22 06:05:42,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18939 states to 18939 states and 35676 transitions. [2020-12-22 06:05:42,873 INFO L78 Accepts]: Start accepts. Automaton has 18939 states and 35676 transitions. Word has length 59 [2020-12-22 06:05:42,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:42,875 INFO L481 AbstractCegarLoop]: Abstraction has 18939 states and 35676 transitions. [2020-12-22 06:05:42,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:05:42,875 INFO L276 IsEmpty]: Start isEmpty. Operand 18939 states and 35676 transitions. [2020-12-22 06:05:42,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 06:05:42,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:42,973 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 06:05:42,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:05:42,973 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:05:42,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:42,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1644099521, now seen corresponding path program 1 times [2020-12-22 06:05:42,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:42,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995615727] [2020-12-22 06:05:42,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:43,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:05:43,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995615727] [2020-12-22 06:05:43,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:43,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:05:43,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098464657] [2020-12-22 06:05:43,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:05:43,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:43,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:05:43,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:05:43,052 INFO L87 Difference]: Start difference. First operand 18939 states and 35676 transitions. Second operand 3 states. [2020-12-22 06:05:44,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:44,238 INFO L93 Difference]: Finished difference Result 50306 states and 94717 transitions. [2020-12-22 06:05:44,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:05:44,239 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-12-22 06:05:44,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:44,344 INFO L225 Difference]: With dead ends: 50306 [2020-12-22 06:05:44,344 INFO L226 Difference]: Without dead ends: 35996 [2020-12-22 06:05:44,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:05:44,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35996 states. [2020-12-22 06:05:45,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35996 to 35981. [2020-12-22 06:05:45,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35981 states. [2020-12-22 06:05:45,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35981 states to 35981 states and 67703 transitions. [2020-12-22 06:05:45,995 INFO L78 Accepts]: Start accepts. Automaton has 35981 states and 67703 transitions. Word has length 60 [2020-12-22 06:05:45,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:45,995 INFO L481 AbstractCegarLoop]: Abstraction has 35981 states and 67703 transitions. [2020-12-22 06:05:45,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:05:45,995 INFO L276 IsEmpty]: Start isEmpty. Operand 35981 states and 67703 transitions. [2020-12-22 06:05:45,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 06:05:45,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:45,999 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 06:05:46,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 06:05:46,000 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:05:46,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:46,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1595983705, now seen corresponding path program 1 times [2020-12-22 06:05:46,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:46,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467516907] [2020-12-22 06:05:46,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:05:46,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467516907] [2020-12-22 06:05:46,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:46,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:05:46,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290882963] [2020-12-22 06:05:46,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:05:46,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:46,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:05:46,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:05:46,071 INFO L87 Difference]: Start difference. First operand 35981 states and 67703 transitions. Second operand 3 states. [2020-12-22 06:05:48,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:48,036 INFO L93 Difference]: Finished difference Result 96974 states and 182324 transitions. [2020-12-22 06:05:48,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:05:48,036 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 06:05:48,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:48,189 INFO L225 Difference]: With dead ends: 96974 [2020-12-22 06:05:48,189 INFO L226 Difference]: Without dead ends: 69186 [2020-12-22 06:05:48,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:05:48,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69186 states. [2020-12-22 06:05:50,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69186 to 69171. [2020-12-22 06:05:50,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69171 states. [2020-12-22 06:05:50,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69171 states to 69171 states and 129958 transitions. [2020-12-22 06:05:50,763 INFO L78 Accepts]: Start accepts. Automaton has 69171 states and 129958 transitions. Word has length 61 [2020-12-22 06:05:50,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:50,764 INFO L481 AbstractCegarLoop]: Abstraction has 69171 states and 129958 transitions. [2020-12-22 06:05:50,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:05:50,764 INFO L276 IsEmpty]: Start isEmpty. Operand 69171 states and 129958 transitions. [2020-12-22 06:05:50,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 06:05:50,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:50,768 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 06:05:50,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:05:50,768 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:05:50,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:50,769 INFO L82 PathProgramCache]: Analyzing trace with hash -209454629, now seen corresponding path program 1 times [2020-12-22 06:05:50,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:50,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618663810] [2020-12-22 06:05:50,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:05:50,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618663810] [2020-12-22 06:05:50,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:50,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:05:50,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269636370] [2020-12-22 06:05:50,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:05:50,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:50,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:05:50,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:05:50,885 INFO L87 Difference]: Start difference. First operand 69171 states and 129958 transitions. Second operand 5 states. [2020-12-22 06:05:55,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:55,943 INFO L93 Difference]: Finished difference Result 288917 states and 543210 transitions. [2020-12-22 06:05:55,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 06:05:55,944 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2020-12-22 06:05:55,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:56,626 INFO L225 Difference]: With dead ends: 288917 [2020-12-22 06:05:56,626 INFO L226 Difference]: Without dead ends: 234355 [2020-12-22 06:05:56,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:05:56,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234355 states. [2020-12-22 06:06:01,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234355 to 116704. [2020-12-22 06:06:01,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116704 states. [2020-12-22 06:06:01,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116704 states to 116704 states and 218883 transitions. [2020-12-22 06:06:01,696 INFO L78 Accepts]: Start accepts. Automaton has 116704 states and 218883 transitions. Word has length 61 [2020-12-22 06:06:01,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:01,696 INFO L481 AbstractCegarLoop]: Abstraction has 116704 states and 218883 transitions. [2020-12-22 06:06:01,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:06:01,697 INFO L276 IsEmpty]: Start isEmpty. Operand 116704 states and 218883 transitions. [2020-12-22 06:06:01,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 06:06:01,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:01,700 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 06:06:01,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 06:06:01,700 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:06:01,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:01,701 INFO L82 PathProgramCache]: Analyzing trace with hash 704991855, now seen corresponding path program 1 times [2020-12-22 06:06:01,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:01,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715404861] [2020-12-22 06:06:01,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:01,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:01,820 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 06:06:01,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715404861] [2020-12-22 06:06:01,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:01,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:06:01,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685985980] [2020-12-22 06:06:01,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:06:01,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:01,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:06:01,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:06:01,825 INFO L87 Difference]: Start difference. First operand 116704 states and 218883 transitions. Second operand 5 states. [2020-12-22 06:06:05,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:05,363 INFO L93 Difference]: Finished difference Result 218445 states and 409391 transitions. [2020-12-22 06:06:05,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:06:05,363 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 06:06:05,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:05,589 INFO L225 Difference]: With dead ends: 218445 [2020-12-22 06:06:05,589 INFO L226 Difference]: Without dead ends: 116783 [2020-12-22 06:06:05,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:06:05,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116783 states. [2020-12-22 06:06:09,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116783 to 116704. [2020-12-22 06:06:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116704 states. [2020-12-22 06:06:09,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116704 states to 116704 states and 218720 transitions. [2020-12-22 06:06:09,629 INFO L78 Accepts]: Start accepts. Automaton has 116704 states and 218720 transitions. Word has length 63 [2020-12-22 06:06:09,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:09,629 INFO L481 AbstractCegarLoop]: Abstraction has 116704 states and 218720 transitions. [2020-12-22 06:06:09,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:06:09,629 INFO L276 IsEmpty]: Start isEmpty. Operand 116704 states and 218720 transitions. [2020-12-22 06:06:09,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 06:06:09,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:09,632 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 06:06:09,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 06:06:09,632 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:06:09,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:09,633 INFO L82 PathProgramCache]: Analyzing trace with hash 118185841, now seen corresponding path program 1 times [2020-12-22 06:06:09,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:09,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049266883] [2020-12-22 06:06:09,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:09,703 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 06:06:09,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049266883] [2020-12-22 06:06:09,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:09,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:06:09,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3940519] [2020-12-22 06:06:09,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:06:09,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:09,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:06:09,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:06:09,705 INFO L87 Difference]: Start difference. First operand 116704 states and 218720 transitions. Second operand 3 states. [2020-12-22 06:06:15,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:15,395 INFO L93 Difference]: Finished difference Result 334549 states and 626754 transitions. [2020-12-22 06:06:15,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:06:15,396 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 06:06:15,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:15,910 INFO L225 Difference]: With dead ends: 334549 [2020-12-22 06:06:15,911 INFO L226 Difference]: Without dead ends: 232283 [2020-12-22 06:06:16,218 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 06:06:16,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232283 states. [2020-12-22 06:06:23,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232283 to 232283. [2020-12-22 06:06:23,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232283 states. [2020-12-22 06:06:23,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232283 states to 232283 states and 435400 transitions. [2020-12-22 06:06:23,981 INFO L78 Accepts]: Start accepts. Automaton has 232283 states and 435400 transitions. Word has length 63 [2020-12-22 06:06:23,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:23,981 INFO L481 AbstractCegarLoop]: Abstraction has 232283 states and 435400 transitions. [2020-12-22 06:06:23,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:06:23,981 INFO L276 IsEmpty]: Start isEmpty. Operand 232283 states and 435400 transitions. [2020-12-22 06:06:23,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 06:06:23,984 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:23,984 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 06:06:23,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 06:06:23,985 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:06:23,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:23,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1350645357, now seen corresponding path program 1 times [2020-12-22 06:06:23,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:23,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101873968] [2020-12-22 06:06:23,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:06:24,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101873968] [2020-12-22 06:06:24,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:24,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:06:24,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419522388] [2020-12-22 06:06:24,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:06:24,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:24,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:06:24,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:06:24,052 INFO L87 Difference]: Start difference. First operand 232283 states and 435400 transitions. Second operand 3 states. [2020-12-22 06:06:35,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:35,166 INFO L93 Difference]: Finished difference Result 666712 states and 1249081 transitions. [2020-12-22 06:06:35,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:06:35,166 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 06:06:35,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:36,687 INFO L225 Difference]: With dead ends: 666712 [2020-12-22 06:06:36,687 INFO L226 Difference]: Without dead ends: 462601 [2020-12-22 06:06:36,910 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 06:06:37,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462601 states. [2020-12-22 06:06:53,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462601 to 462599. [2020-12-22 06:06:53,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462599 states. [2020-12-22 06:06:56,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462599 states to 462599 states and 867130 transitions. [2020-12-22 06:06:56,709 INFO L78 Accepts]: Start accepts. Automaton has 462599 states and 867130 transitions. Word has length 65 [2020-12-22 06:06:56,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:56,737 INFO L481 AbstractCegarLoop]: Abstraction has 462599 states and 867130 transitions. [2020-12-22 06:06:56,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:06:56,737 INFO L276 IsEmpty]: Start isEmpty. Operand 462599 states and 867130 transitions. [2020-12-22 06:06:56,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 06:06:56,750 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:56,752 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:06:56,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 06:06:56,753 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:06:56,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:56,753 INFO L82 PathProgramCache]: Analyzing trace with hash -104913056, now seen corresponding path program 1 times [2020-12-22 06:06:56,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:56,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734315847] [2020-12-22 06:06:56,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:56,836 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 06:06:56,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734315847] [2020-12-22 06:06:56,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:56,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:06:56,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653331240] [2020-12-22 06:06:56,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:06:56,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:56,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:06:56,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:06:56,838 INFO L87 Difference]: Start difference. First operand 462599 states and 867130 transitions. Second operand 3 states. [2020-12-22 06:07:20,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:20,626 INFO L93 Difference]: Finished difference Result 1327865 states and 2487653 transitions. [2020-12-22 06:07:20,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:07:20,627 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 06:07:20,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:24,638 INFO L225 Difference]: With dead ends: 1327865 [2020-12-22 06:07:24,638 INFO L226 Difference]: Without dead ends: 920443 [2020-12-22 06:07:26,364 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 06:07:27,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920443 states. [2020-12-22 06:08:08,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920443 to 920439. [2020-12-22 06:08:08,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 920439 states. [2020-12-22 06:08:14,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920439 states to 920439 states and 1725204 transitions. [2020-12-22 06:08:14,826 INFO L78 Accepts]: Start accepts. Automaton has 920439 states and 1725204 transitions. Word has length 66 [2020-12-22 06:08:14,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:08:14,827 INFO L481 AbstractCegarLoop]: Abstraction has 920439 states and 1725204 transitions. [2020-12-22 06:08:14,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:08:14,827 INFO L276 IsEmpty]: Start isEmpty. Operand 920439 states and 1725204 transitions. [2020-12-22 06:08:14,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 06:08:14,870 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:08:14,870 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:08:14,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 06:08:14,872 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:08:14,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:08:14,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1042685178, now seen corresponding path program 1 times [2020-12-22 06:08:14,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:08:14,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455022479] [2020-12-22 06:08:14,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:08:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:08:15,018 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 06:08:15,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455022479] [2020-12-22 06:08:15,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:08:15,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:08:15,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080242215] [2020-12-22 06:08:15,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:08:15,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:08:15,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:08:15,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:08:15,023 INFO L87 Difference]: Start difference. First operand 920439 states and 1725204 transitions. Second operand 3 states.