/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_product30.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:06:58,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:06:58,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:06:58,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:06:58,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:06:58,198 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:06:58,213 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:06:58,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:06:58,225 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:06:58,231 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:06:58,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:06:58,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:06:58,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:06:58,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:06:58,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:06:58,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:06:58,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:06:58,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:06:58,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:06:58,257 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:06:58,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:06:58,262 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:06:58,263 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:06:58,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:06:58,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:06:58,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:06:58,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:06:58,281 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:06:58,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:06:58,282 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:06:58,283 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:06:58,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:06:58,284 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:06:58,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:06:58,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:06:58,285 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:06:58,286 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:06:58,340 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:06:58,340 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:06:58,342 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:06:58,342 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:06:58,342 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:06:58,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:06:58,343 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:06:58,343 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:06:58,343 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:06:58,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:06:58,344 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:06:58,344 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:06:58,344 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:06:58,344 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:06:58,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:06:58,345 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:06:58,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:06:58,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:06:58,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:06:58,345 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:06:58,346 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:06:58,346 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:06:58,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:06:58,346 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:06:58,346 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:06:58,347 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:06:58,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:06:58,733 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:06:58,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:06:58,738 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:06:58,738 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:06:58,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c [2020-12-22 06:06:58,809 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0aa056746/bf61cf02497e4036b3e363a777adfa4f/FLAG4b2843164 [2020-12-22 06:06:59,653 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:06:59,654 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c [2020-12-22 06:06:59,682 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0aa056746/bf61cf02497e4036b3e363a777adfa4f/FLAG4b2843164 [2020-12-22 06:06:59,811 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0aa056746/bf61cf02497e4036b3e363a777adfa4f [2020-12-22 06:06:59,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:06:59,820 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:06:59,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:06:59,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:06:59,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:06:59,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:06:59" (1/1) ... [2020-12-22 06:06:59,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@728cd5cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:59, skipping insertion in model container [2020-12-22 06:06:59,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:06:59" (1/1) ... [2020-12-22 06:06:59,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:06:59,954 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:07:00,352 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_product30.cil.c[10287,10300] [2020-12-22 06:07:00,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:07:00,786 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:07:00,827 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_product30.cil.c[10287,10300] [2020-12-22 06:07:00,906 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:07:00,977 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:07:00,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:07:00 WrapperNode [2020-12-22 06:07:00,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:07:00,979 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:07:00,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:07:00,979 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:07:00,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:07:00" (1/1) ... [2020-12-22 06:07:01,054 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:07:00" (1/1) ... [2020-12-22 06:07:01,544 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:07:01,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:07:01,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:07:01,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:07:01,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:07:00" (1/1) ... [2020-12-22 06:07:01,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:07:00" (1/1) ... [2020-12-22 06:07:01,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:07:00" (1/1) ... [2020-12-22 06:07:01,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:07:00" (1/1) ... [2020-12-22 06:07:01,908 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:07:00" (1/1) ... [2020-12-22 06:07:02,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:07:00" (1/1) ... [2020-12-22 06:07:02,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:07:00" (1/1) ... [2020-12-22 06:07:02,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:07:02,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:07:02,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:07:02,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:07:02,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:07:00" (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 06:07:02,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:07:02,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:07:02,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:07:02,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:07:15,906 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:07:15,907 INFO L299 CfgBuilder]: Removed 1565 assume(true) statements. [2020-12-22 06:07:15,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:07:15 BoogieIcfgContainer [2020-12-22 06:07:15,917 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:07:15,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:07:15,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:07:15,923 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:07:15,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:06:59" (1/3) ... [2020-12-22 06:07:15,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ab019e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:07:15, skipping insertion in model container [2020-12-22 06:07:15,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:07:00" (2/3) ... [2020-12-22 06:07:15,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ab019e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:07:15, skipping insertion in model container [2020-12-22 06:07:15,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:07:15" (3/3) ... [2020-12-22 06:07:15,926 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product30.cil.c [2020-12-22 06:07:15,933 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:07:15,942 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-22 06:07:15,961 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-22 06:07:16,011 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:07:16,011 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:07:16,011 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:07:16,011 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:07:16,011 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:07:16,012 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:07:16,012 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:07:16,012 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:07:16,122 INFO L276 IsEmpty]: Start isEmpty. Operand 6968 states. [2020-12-22 06:07:16,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 06:07:16,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:16,136 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] [2020-12-22 06:07:16,136 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 06:07:16,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:16,143 INFO L82 PathProgramCache]: Analyzing trace with hash -760238624, now seen corresponding path program 1 times [2020-12-22 06:07:16,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:16,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633652510] [2020-12-22 06:07:16,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:16,637 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 06:07:16,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633652510] [2020-12-22 06:07:16,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:16,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:07:16,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491035762] [2020-12-22 06:07:16,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:07:16,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:16,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:07:16,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:07:16,669 INFO L87 Difference]: Start difference. First operand 6968 states. Second operand 3 states. [2020-12-22 06:07:17,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:17,111 INFO L93 Difference]: Finished difference Result 13927 states and 26361 transitions. [2020-12-22 06:07:17,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:07:17,113 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-12-22 06:07:17,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:17,195 INFO L225 Difference]: With dead ends: 13927 [2020-12-22 06:07:17,195 INFO L226 Difference]: Without dead ends: 6964 [2020-12-22 06:07:17,219 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 06:07:17,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6964 states. [2020-12-22 06:07:17,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6964 to 6964. [2020-12-22 06:07:17,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6964 states. [2020-12-22 06:07:17,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6964 states to 6964 states and 13171 transitions. [2020-12-22 06:07:17,699 INFO L78 Accepts]: Start accepts. Automaton has 6964 states and 13171 transitions. Word has length 27 [2020-12-22 06:07:17,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:17,700 INFO L481 AbstractCegarLoop]: Abstraction has 6964 states and 13171 transitions. [2020-12-22 06:07:17,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:07:17,700 INFO L276 IsEmpty]: Start isEmpty. Operand 6964 states and 13171 transitions. [2020-12-22 06:07:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 06:07:17,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:17,711 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] [2020-12-22 06:07:17,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:07:17,712 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 06:07:17,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:17,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1074782651, now seen corresponding path program 1 times [2020-12-22 06:07:17,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:17,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179486247] [2020-12-22 06:07:17,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:17,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:17,873 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 06:07:17,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179486247] [2020-12-22 06:07:17,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:17,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:07:17,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309283308] [2020-12-22 06:07:17,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:07:17,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:17,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:07:17,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:07:17,877 INFO L87 Difference]: Start difference. First operand 6964 states and 13171 transitions. Second operand 6 states. [2020-12-22 06:07:18,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:18,415 INFO L93 Difference]: Finished difference Result 13879 states and 26258 transitions. [2020-12-22 06:07:18,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:07:18,416 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-12-22 06:07:18,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:18,458 INFO L225 Difference]: With dead ends: 13879 [2020-12-22 06:07:18,458 INFO L226 Difference]: Without dead ends: 6958 [2020-12-22 06:07:18,472 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 06:07:18,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6958 states. [2020-12-22 06:07:18,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6958 to 6958. [2020-12-22 06:07:18,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6958 states. [2020-12-22 06:07:18,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6958 states to 6958 states and 13158 transitions. [2020-12-22 06:07:18,735 INFO L78 Accepts]: Start accepts. Automaton has 6958 states and 13158 transitions. Word has length 34 [2020-12-22 06:07:18,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:18,735 INFO L481 AbstractCegarLoop]: Abstraction has 6958 states and 13158 transitions. [2020-12-22 06:07:18,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:07:18,735 INFO L276 IsEmpty]: Start isEmpty. Operand 6958 states and 13158 transitions. [2020-12-22 06:07:18,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 06:07:18,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:18,738 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] [2020-12-22 06:07:18,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:07:18,740 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 06:07:18,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:18,742 INFO L82 PathProgramCache]: Analyzing trace with hash -33959837, now seen corresponding path program 1 times [2020-12-22 06:07:18,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:18,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62905478] [2020-12-22 06:07:18,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:18,893 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 06:07:18,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62905478] [2020-12-22 06:07:18,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:18,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:07:18,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785735476] [2020-12-22 06:07:18,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:07:18,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:18,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:07:18,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:07:18,897 INFO L87 Difference]: Start difference. First operand 6958 states and 13158 transitions. Second operand 4 states. [2020-12-22 06:07:19,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:19,305 INFO L93 Difference]: Finished difference Result 13873 states and 26245 transitions. [2020-12-22 06:07:19,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:07:19,306 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-12-22 06:07:19,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:19,344 INFO L225 Difference]: With dead ends: 13873 [2020-12-22 06:07:19,345 INFO L226 Difference]: Without dead ends: 6958 [2020-12-22 06:07:19,356 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 06:07:19,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6958 states. [2020-12-22 06:07:19,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6958 to 6958. [2020-12-22 06:07:19,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6958 states. [2020-12-22 06:07:19,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6958 states to 6958 states and 13154 transitions. [2020-12-22 06:07:19,622 INFO L78 Accepts]: Start accepts. Automaton has 6958 states and 13154 transitions. Word has length 35 [2020-12-22 06:07:19,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:19,627 INFO L481 AbstractCegarLoop]: Abstraction has 6958 states and 13154 transitions. [2020-12-22 06:07:19,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:07:19,627 INFO L276 IsEmpty]: Start isEmpty. Operand 6958 states and 13154 transitions. [2020-12-22 06:07:19,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 06:07:19,631 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:19,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:19,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:07:19,632 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 06:07:19,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:19,632 INFO L82 PathProgramCache]: Analyzing trace with hash -651579480, now seen corresponding path program 1 times [2020-12-22 06:07:19,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:19,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360779323] [2020-12-22 06:07:19,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:19,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:07:19,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360779323] [2020-12-22 06:07:19,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:19,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:07:19,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812375375] [2020-12-22 06:07:19,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:07:19,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:19,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:07:19,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:07:19,743 INFO L87 Difference]: Start difference. First operand 6958 states and 13154 transitions. Second operand 4 states. [2020-12-22 06:07:20,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:20,089 INFO L93 Difference]: Finished difference Result 13873 states and 26241 transitions. [2020-12-22 06:07:20,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:07:20,090 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-12-22 06:07:20,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:20,135 INFO L225 Difference]: With dead ends: 13873 [2020-12-22 06:07:20,136 INFO L226 Difference]: Without dead ends: 6958 [2020-12-22 06:07:20,148 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 06:07:20,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6958 states. [2020-12-22 06:07:20,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6958 to 6958. [2020-12-22 06:07:20,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6958 states. [2020-12-22 06:07:20,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6958 states to 6958 states and 13150 transitions. [2020-12-22 06:07:20,520 INFO L78 Accepts]: Start accepts. Automaton has 6958 states and 13150 transitions. Word has length 36 [2020-12-22 06:07:20,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:20,520 INFO L481 AbstractCegarLoop]: Abstraction has 6958 states and 13150 transitions. [2020-12-22 06:07:20,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:07:20,520 INFO L276 IsEmpty]: Start isEmpty. Operand 6958 states and 13150 transitions. [2020-12-22 06:07:20,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 06:07:20,522 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:20,522 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] [2020-12-22 06:07:20,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:07:20,525 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 06:07:20,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:20,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1749656008, now seen corresponding path program 1 times [2020-12-22 06:07:20,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:20,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248967613] [2020-12-22 06:07:20,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:20,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:20,611 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 06:07:20,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248967613] [2020-12-22 06:07:20,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:20,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:07:20,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94652810] [2020-12-22 06:07:20,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:07:20,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:20,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:07:20,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:07:20,614 INFO L87 Difference]: Start difference. First operand 6958 states and 13150 transitions. Second operand 4 states. [2020-12-22 06:07:20,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:20,948 INFO L93 Difference]: Finished difference Result 13873 states and 26237 transitions. [2020-12-22 06:07:20,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:07:20,949 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-12-22 06:07:20,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:20,970 INFO L225 Difference]: With dead ends: 13873 [2020-12-22 06:07:20,971 INFO L226 Difference]: Without dead ends: 6958 [2020-12-22 06:07:20,983 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 06:07:21,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6958 states. [2020-12-22 06:07:21,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6958 to 6958. [2020-12-22 06:07:21,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6958 states. [2020-12-22 06:07:21,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6958 states to 6958 states and 13146 transitions. [2020-12-22 06:07:21,246 INFO L78 Accepts]: Start accepts. Automaton has 6958 states and 13146 transitions. Word has length 37 [2020-12-22 06:07:21,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:21,248 INFO L481 AbstractCegarLoop]: Abstraction has 6958 states and 13146 transitions. [2020-12-22 06:07:21,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:07:21,248 INFO L276 IsEmpty]: Start isEmpty. Operand 6958 states and 13146 transitions. [2020-12-22 06:07:21,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 06:07:21,252 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:21,252 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] [2020-12-22 06:07:21,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:07:21,253 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 06:07:21,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:21,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1341948344, now seen corresponding path program 1 times [2020-12-22 06:07:21,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:21,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121682331] [2020-12-22 06:07:21,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:21,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:21,334 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 06:07:21,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121682331] [2020-12-22 06:07:21,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:21,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:07:21,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885819261] [2020-12-22 06:07:21,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:07:21,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:21,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:07:21,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:07:21,337 INFO L87 Difference]: Start difference. First operand 6958 states and 13146 transitions. Second operand 4 states. [2020-12-22 06:07:21,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:21,618 INFO L93 Difference]: Finished difference Result 13873 states and 26233 transitions. [2020-12-22 06:07:21,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:07:21,619 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-12-22 06:07:21,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:21,643 INFO L225 Difference]: With dead ends: 13873 [2020-12-22 06:07:21,644 INFO L226 Difference]: Without dead ends: 6937 [2020-12-22 06:07:21,657 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 06:07:21,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6937 states. [2020-12-22 06:07:21,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6937 to 6937. [2020-12-22 06:07:21,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6937 states. [2020-12-22 06:07:21,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6937 states to 6937 states and 13112 transitions. [2020-12-22 06:07:21,886 INFO L78 Accepts]: Start accepts. Automaton has 6937 states and 13112 transitions. Word has length 37 [2020-12-22 06:07:21,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:21,886 INFO L481 AbstractCegarLoop]: Abstraction has 6937 states and 13112 transitions. [2020-12-22 06:07:21,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:07:21,886 INFO L276 IsEmpty]: Start isEmpty. Operand 6937 states and 13112 transitions. [2020-12-22 06:07:21,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 06:07:21,887 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:21,888 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:21,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:07:21,888 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 06:07:21,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:21,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1048847251, now seen corresponding path program 1 times [2020-12-22 06:07:21,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:21,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443852122] [2020-12-22 06:07:21,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:21,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:22,001 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 06:07:22,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443852122] [2020-12-22 06:07:22,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:22,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:07:22,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212677906] [2020-12-22 06:07:22,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:07:22,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:22,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:07:22,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:07:22,005 INFO L87 Difference]: Start difference. First operand 6937 states and 13112 transitions. Second operand 4 states. [2020-12-22 06:07:22,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:22,292 INFO L93 Difference]: Finished difference Result 13852 states and 26199 transitions. [2020-12-22 06:07:22,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:07:22,292 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-12-22 06:07:22,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:22,313 INFO L225 Difference]: With dead ends: 13852 [2020-12-22 06:07:22,313 INFO L226 Difference]: Without dead ends: 6937 [2020-12-22 06:07:22,326 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 06:07:22,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6937 states. [2020-12-22 06:07:22,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6937 to 6937. [2020-12-22 06:07:22,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6937 states. [2020-12-22 06:07:22,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6937 states to 6937 states and 13111 transitions. [2020-12-22 06:07:22,559 INFO L78 Accepts]: Start accepts. Automaton has 6937 states and 13111 transitions. Word has length 38 [2020-12-22 06:07:22,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:22,559 INFO L481 AbstractCegarLoop]: Abstraction has 6937 states and 13111 transitions. [2020-12-22 06:07:22,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:07:22,560 INFO L276 IsEmpty]: Start isEmpty. Operand 6937 states and 13111 transitions. [2020-12-22 06:07:22,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 06:07:22,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:22,562 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] [2020-12-22 06:07:22,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:07:22,562 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 06:07:22,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:22,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1830494419, now seen corresponding path program 1 times [2020-12-22 06:07:22,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:22,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180431104] [2020-12-22 06:07:22,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:22,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:22,642 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 06:07:22,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180431104] [2020-12-22 06:07:22,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:22,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:07:22,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696844371] [2020-12-22 06:07:22,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:07:22,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:22,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:07:22,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:07:22,645 INFO L87 Difference]: Start difference. First operand 6937 states and 13111 transitions. Second operand 4 states. [2020-12-22 06:07:22,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:22,945 INFO L93 Difference]: Finished difference Result 13852 states and 26198 transitions. [2020-12-22 06:07:22,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:07:22,945 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-12-22 06:07:22,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:22,965 INFO L225 Difference]: With dead ends: 13852 [2020-12-22 06:07:22,966 INFO L226 Difference]: Without dead ends: 6937 [2020-12-22 06:07:22,978 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 06:07:22,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6937 states. [2020-12-22 06:07:23,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6937 to 6937. [2020-12-22 06:07:23,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6937 states. [2020-12-22 06:07:23,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6937 states to 6937 states and 13110 transitions. [2020-12-22 06:07:23,321 INFO L78 Accepts]: Start accepts. Automaton has 6937 states and 13110 transitions. Word has length 39 [2020-12-22 06:07:23,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:23,322 INFO L481 AbstractCegarLoop]: Abstraction has 6937 states and 13110 transitions. [2020-12-22 06:07:23,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:07:23,324 INFO L276 IsEmpty]: Start isEmpty. Operand 6937 states and 13110 transitions. [2020-12-22 06:07:23,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 06:07:23,325 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:23,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:23,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:07:23,326 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 06:07:23,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:23,327 INFO L82 PathProgramCache]: Analyzing trace with hash -219144910, now seen corresponding path program 1 times [2020-12-22 06:07:23,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:23,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977299509] [2020-12-22 06:07:23,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:23,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:23,422 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 06:07:23,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977299509] [2020-12-22 06:07:23,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:23,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:07:23,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234571827] [2020-12-22 06:07:23,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:07:23,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:23,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:07:23,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:07:23,430 INFO L87 Difference]: Start difference. First operand 6937 states and 13110 transitions. Second operand 7 states. [2020-12-22 06:07:23,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:23,939 INFO L93 Difference]: Finished difference Result 13846 states and 26186 transitions. [2020-12-22 06:07:23,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:07:23,940 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-12-22 06:07:23,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:23,962 INFO L225 Difference]: With dead ends: 13846 [2020-12-22 06:07:23,962 INFO L226 Difference]: Without dead ends: 6937 [2020-12-22 06:07:23,979 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 06:07:23,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6937 states. [2020-12-22 06:07:24,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6937 to 6937. [2020-12-22 06:07:24,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6937 states. [2020-12-22 06:07:24,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6937 states to 6937 states and 13109 transitions. [2020-12-22 06:07:24,276 INFO L78 Accepts]: Start accepts. Automaton has 6937 states and 13109 transitions. Word has length 40 [2020-12-22 06:07:24,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:24,276 INFO L481 AbstractCegarLoop]: Abstraction has 6937 states and 13109 transitions. [2020-12-22 06:07:24,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:07:24,277 INFO L276 IsEmpty]: Start isEmpty. Operand 6937 states and 13109 transitions. [2020-12-22 06:07:24,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 06:07:24,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:24,278 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:24,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 06:07:24,278 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 06:07:24,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:24,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1833067166, now seen corresponding path program 1 times [2020-12-22 06:07:24,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:24,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50255744] [2020-12-22 06:07:24,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:24,369 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 06:07:24,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50255744] [2020-12-22 06:07:24,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:24,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:07:24,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086856549] [2020-12-22 06:07:24,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:07:24,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:24,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:07:24,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:07:24,372 INFO L87 Difference]: Start difference. First operand 6937 states and 13109 transitions. Second operand 3 states. [2020-12-22 06:07:25,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:25,186 INFO L93 Difference]: Finished difference Result 15457 states and 29247 transitions. [2020-12-22 06:07:25,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:07:25,188 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 06:07:25,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:25,218 INFO L225 Difference]: With dead ends: 15457 [2020-12-22 06:07:25,218 INFO L226 Difference]: Without dead ends: 11948 [2020-12-22 06:07:25,227 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 06:07:25,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11948 states. [2020-12-22 06:07:25,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11948 to 9849. [2020-12-22 06:07:25,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9849 states. [2020-12-22 06:07:25,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9849 states to 9849 states and 18625 transitions. [2020-12-22 06:07:25,786 INFO L78 Accepts]: Start accepts. Automaton has 9849 states and 18625 transitions. Word has length 41 [2020-12-22 06:07:25,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:25,786 INFO L481 AbstractCegarLoop]: Abstraction has 9849 states and 18625 transitions. [2020-12-22 06:07:25,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:07:25,787 INFO L276 IsEmpty]: Start isEmpty. Operand 9849 states and 18625 transitions. [2020-12-22 06:07:25,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 06:07:25,793 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:25,794 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 06:07:25,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:07:25,794 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 06:07:25,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:25,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1981159343, now seen corresponding path program 1 times [2020-12-22 06:07:25,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:25,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276057453] [2020-12-22 06:07:25,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:25,956 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 06:07:25,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276057453] [2020-12-22 06:07:25,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:25,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:07:25,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790108435] [2020-12-22 06:07:25,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 06:07:25,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:25,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 06:07:25,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:07:25,962 INFO L87 Difference]: Start difference. First operand 9849 states and 18625 transitions. Second operand 8 states. [2020-12-22 06:07:27,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:27,415 INFO L93 Difference]: Finished difference Result 21615 states and 40655 transitions. [2020-12-22 06:07:27,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 06:07:27,416 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-12-22 06:07:27,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:27,455 INFO L225 Difference]: With dead ends: 21615 [2020-12-22 06:07:27,456 INFO L226 Difference]: Without dead ends: 12997 [2020-12-22 06:07:27,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-12-22 06:07:27,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12997 states. [2020-12-22 06:07:27,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12997 to 8085. [2020-12-22 06:07:27,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8085 states. [2020-12-22 06:07:27,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8085 states to 8085 states and 15229 transitions. [2020-12-22 06:07:27,892 INFO L78 Accepts]: Start accepts. Automaton has 8085 states and 15229 transitions. Word has length 59 [2020-12-22 06:07:27,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:27,893 INFO L481 AbstractCegarLoop]: Abstraction has 8085 states and 15229 transitions. [2020-12-22 06:07:27,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 06:07:27,893 INFO L276 IsEmpty]: Start isEmpty. Operand 8085 states and 15229 transitions. [2020-12-22 06:07:27,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 06:07:27,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:27,897 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 06:07:27,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 06:07:27,901 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 06:07:27,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:27,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1607338170, now seen corresponding path program 1 times [2020-12-22 06:07:27,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:27,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128408531] [2020-12-22 06:07:27,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:27,982 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 06:07:27,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128408531] [2020-12-22 06:07:27,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:27,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:07:27,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854161948] [2020-12-22 06:07:27,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:07:27,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:27,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:07:27,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:07:27,984 INFO L87 Difference]: Start difference. First operand 8085 states and 15229 transitions. Second operand 3 states. [2020-12-22 06:07:28,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:28,812 INFO L93 Difference]: Finished difference Result 19009 states and 35836 transitions. [2020-12-22 06:07:28,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:07:28,812 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-12-22 06:07:28,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:28,842 INFO L225 Difference]: With dead ends: 19009 [2020-12-22 06:07:28,842 INFO L226 Difference]: Without dead ends: 12207 [2020-12-22 06:07:28,852 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 06:07:28,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12207 states. [2020-12-22 06:07:29,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12207 to 12192. [2020-12-22 06:07:29,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12192 states. [2020-12-22 06:07:29,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12192 states to 12192 states and 22923 transitions. [2020-12-22 06:07:29,373 INFO L78 Accepts]: Start accepts. Automaton has 12192 states and 22923 transitions. Word has length 60 [2020-12-22 06:07:29,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:29,373 INFO L481 AbstractCegarLoop]: Abstraction has 12192 states and 22923 transitions. [2020-12-22 06:07:29,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:07:29,373 INFO L276 IsEmpty]: Start isEmpty. Operand 12192 states and 22923 transitions. [2020-12-22 06:07:29,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 06:07:29,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:29,377 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 06:07:29,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:07:29,377 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 06:07:29,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:29,378 INFO L82 PathProgramCache]: Analyzing trace with hash -320348117, now seen corresponding path program 1 times [2020-12-22 06:07:29,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:29,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059145050] [2020-12-22 06:07:29,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:29,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:29,473 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 06:07:29,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059145050] [2020-12-22 06:07:29,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:29,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:07:29,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434959260] [2020-12-22 06:07:29,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:07:29,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:29,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:07:29,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:07:29,476 INFO L87 Difference]: Start difference. First operand 12192 states and 22923 transitions. Second operand 3 states. [2020-12-22 06:07:30,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:30,408 INFO L93 Difference]: Finished difference Result 30622 states and 57612 transitions. [2020-12-22 06:07:30,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:07:30,409 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 06:07:30,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:30,453 INFO L225 Difference]: With dead ends: 30622 [2020-12-22 06:07:30,453 INFO L226 Difference]: Without dead ends: 20328 [2020-12-22 06:07:30,469 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 06:07:30,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20328 states. [2020-12-22 06:07:31,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20328 to 20313. [2020-12-22 06:07:31,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20313 states. [2020-12-22 06:07:31,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20313 states to 20313 states and 38152 transitions. [2020-12-22 06:07:31,284 INFO L78 Accepts]: Start accepts. Automaton has 20313 states and 38152 transitions. Word has length 61 [2020-12-22 06:07:31,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:31,284 INFO L481 AbstractCegarLoop]: Abstraction has 20313 states and 38152 transitions. [2020-12-22 06:07:31,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:07:31,284 INFO L276 IsEmpty]: Start isEmpty. Operand 20313 states and 38152 transitions. [2020-12-22 06:07:31,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 06:07:31,288 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:31,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:31,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 06:07:31,289 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 06:07:31,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:31,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1979774239, now seen corresponding path program 1 times [2020-12-22 06:07:31,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:31,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032607349] [2020-12-22 06:07:31,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:31,354 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 06:07:31,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032607349] [2020-12-22 06:07:31,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:31,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:07:31,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474114890] [2020-12-22 06:07:31,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:07:31,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:31,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:07:31,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:07:31,357 INFO L87 Difference]: Start difference. First operand 20313 states and 38152 transitions. Second operand 3 states. [2020-12-22 06:07:32,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:32,550 INFO L93 Difference]: Finished difference Result 53662 states and 100821 transitions. [2020-12-22 06:07:32,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:07:32,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 06:07:32,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:32,624 INFO L225 Difference]: With dead ends: 53662 [2020-12-22 06:07:32,624 INFO L226 Difference]: Without dead ends: 36364 [2020-12-22 06:07:32,653 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 06:07:32,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36364 states. [2020-12-22 06:07:33,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36364 to 36349. [2020-12-22 06:07:33,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36349 states. [2020-12-22 06:07:33,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36349 states to 36349 states and 68210 transitions. [2020-12-22 06:07:33,704 INFO L78 Accepts]: Start accepts. Automaton has 36349 states and 68210 transitions. Word has length 62 [2020-12-22 06:07:33,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:33,704 INFO L481 AbstractCegarLoop]: Abstraction has 36349 states and 68210 transitions. [2020-12-22 06:07:33,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:07:33,704 INFO L276 IsEmpty]: Start isEmpty. Operand 36349 states and 68210 transitions. [2020-12-22 06:07:33,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 06:07:33,707 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:33,707 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 06:07:33,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:07:33,707 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 06:07:33,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:33,708 INFO L82 PathProgramCache]: Analyzing trace with hash -2096988944, now seen corresponding path program 1 times [2020-12-22 06:07:33,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:33,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121189614] [2020-12-22 06:07:33,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:33,769 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 06:07:33,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121189614] [2020-12-22 06:07:33,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:33,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:07:33,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841767079] [2020-12-22 06:07:33,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:07:33,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:33,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:07:33,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:07:33,771 INFO L87 Difference]: Start difference. First operand 36349 states and 68210 transitions. Second operand 3 states. [2020-12-22 06:07:36,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:36,093 INFO L93 Difference]: Finished difference Result 99330 states and 186390 transitions. [2020-12-22 06:07:36,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:07:36,093 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 06:07:36,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:36,219 INFO L225 Difference]: With dead ends: 99330 [2020-12-22 06:07:36,220 INFO L226 Difference]: Without dead ends: 68004 [2020-12-22 06:07:36,276 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 06:07:36,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68004 states. [2020-12-22 06:07:38,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68004 to 67989. [2020-12-22 06:07:38,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67989 states. [2020-12-22 06:07:38,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67989 states to 67989 states and 127444 transitions. [2020-12-22 06:07:38,758 INFO L78 Accepts]: Start accepts. Automaton has 67989 states and 127444 transitions. Word has length 63 [2020-12-22 06:07:38,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:38,758 INFO L481 AbstractCegarLoop]: Abstraction has 67989 states and 127444 transitions. [2020-12-22 06:07:38,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:07:38,758 INFO L276 IsEmpty]: Start isEmpty. Operand 67989 states and 127444 transitions. [2020-12-22 06:07:38,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 06:07:38,762 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:38,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:38,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 06:07:38,763 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 06:07:38,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:38,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1993740924, now seen corresponding path program 1 times [2020-12-22 06:07:38,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:38,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907758298] [2020-12-22 06:07:38,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:38,830 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 06:07:38,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907758298] [2020-12-22 06:07:38,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:38,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:07:38,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433185179] [2020-12-22 06:07:38,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:07:38,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:38,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:07:38,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:07:38,832 INFO L87 Difference]: Start difference. First operand 67989 states and 127444 transitions. Second operand 3 states. [2020-12-22 06:07:42,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:42,490 INFO L93 Difference]: Finished difference Result 189802 states and 355667 transitions. [2020-12-22 06:07:42,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:07:42,491 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 06:07:42,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:42,866 INFO L225 Difference]: With dead ends: 189802 [2020-12-22 06:07:42,867 INFO L226 Difference]: Without dead ends: 130400 [2020-12-22 06:07:42,924 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 06:07:43,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130400 states. [2020-12-22 06:07:47,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130400 to 130385. [2020-12-22 06:07:47,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130385 states. [2020-12-22 06:07:47,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130385 states to 130385 states and 244066 transitions. [2020-12-22 06:07:47,688 INFO L78 Accepts]: Start accepts. Automaton has 130385 states and 244066 transitions. Word has length 64 [2020-12-22 06:07:47,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:47,689 INFO L481 AbstractCegarLoop]: Abstraction has 130385 states and 244066 transitions. [2020-12-22 06:07:47,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:07:47,689 INFO L276 IsEmpty]: Start isEmpty. Operand 130385 states and 244066 transitions. [2020-12-22 06:07:47,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 06:07:47,693 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:47,693 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:47,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 06:07:47,693 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 06:07:47,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:47,694 INFO L82 PathProgramCache]: Analyzing trace with hash 495788038, now seen corresponding path program 1 times [2020-12-22 06:07:47,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:47,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725146670] [2020-12-22 06:07:47,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:47,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:47,783 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 06:07:47,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725146670] [2020-12-22 06:07:47,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:47,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:07:47,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625360554] [2020-12-22 06:07:47,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:07:47,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:47,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:07:47,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:07:47,786 INFO L87 Difference]: Start difference. First operand 130385 states and 244066 transitions. Second operand 5 states. [2020-12-22 06:07:59,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:59,684 INFO L93 Difference]: Finished difference Result 603987 states and 1131127 transitions. [2020-12-22 06:07:59,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 06:07:59,685 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 06:07:59,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:08:01,003 INFO L225 Difference]: With dead ends: 603987 [2020-12-22 06:08:01,003 INFO L226 Difference]: Without dead ends: 488605 [2020-12-22 06:08:01,189 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 06:08:01,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488605 states. [2020-12-22 06:08:11,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488605 to 232108. [2020-12-22 06:08:11,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232108 states. [2020-12-22 06:08:12,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232108 states to 232108 states and 433752 transitions. [2020-12-22 06:08:12,008 INFO L78 Accepts]: Start accepts. Automaton has 232108 states and 433752 transitions. Word has length 64 [2020-12-22 06:08:12,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:08:12,008 INFO L481 AbstractCegarLoop]: Abstraction has 232108 states and 433752 transitions. [2020-12-22 06:08:12,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:08:12,008 INFO L276 IsEmpty]: Start isEmpty. Operand 232108 states and 433752 transitions. [2020-12-22 06:08:12,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 06:08:12,012 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:08:12,012 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 06:08:12,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 06:08:12,012 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 06:08:12,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:08:12,013 INFO L82 PathProgramCache]: Analyzing trace with hash 228187224, now seen corresponding path program 1 times [2020-12-22 06:08:12,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:08:12,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912274408] [2020-12-22 06:08:12,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:08:12,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:08:12,080 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 06:08:12,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912274408] [2020-12-22 06:08:12,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:08:12,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:08:12,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926994837] [2020-12-22 06:08:12,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:08:12,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:08:12,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:08:12,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:08:12,082 INFO L87 Difference]: Start difference. First operand 232108 states and 433752 transitions. Second operand 5 states. [2020-12-22 06:08:23,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:08:23,182 INFO L93 Difference]: Finished difference Result 582402 states and 1087126 transitions. [2020-12-22 06:08:23,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:08:23,183 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-12-22 06:08:23,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:08:23,977 INFO L225 Difference]: With dead ends: 582402 [2020-12-22 06:08:23,978 INFO L226 Difference]: Without dead ends: 365702 [2020-12-22 06:08:24,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:08:24,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365702 states. [2020-12-22 06:08:33,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365702 to 232773. [2020-12-22 06:08:33,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232773 states. [2020-12-22 06:08:34,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232773 states to 232773 states and 434417 transitions. [2020-12-22 06:08:34,262 INFO L78 Accepts]: Start accepts. Automaton has 232773 states and 434417 transitions. Word has length 66 [2020-12-22 06:08:34,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:08:34,262 INFO L481 AbstractCegarLoop]: Abstraction has 232773 states and 434417 transitions. [2020-12-22 06:08:34,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:08:34,262 INFO L276 IsEmpty]: Start isEmpty. Operand 232773 states and 434417 transitions. [2020-12-22 06:08:34,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 06:08:34,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:08:34,268 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:08:34,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 06:08:34,268 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 06:08:34,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:08:34,269 INFO L82 PathProgramCache]: Analyzing trace with hash 945984633, now seen corresponding path program 1 times [2020-12-22 06:08:34,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:08:34,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510347851] [2020-12-22 06:08:34,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:08:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:08:34,341 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 06:08:34,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510347851] [2020-12-22 06:08:34,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:08:34,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:08:34,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366115285] [2020-12-22 06:08:34,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:08:34,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:08:34,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:08:34,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:08:34,344 INFO L87 Difference]: Start difference. First operand 232773 states and 434417 transitions. Second operand 3 states. [2020-12-22 06:08:46,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:08:46,993 INFO L93 Difference]: Finished difference Result 506256 states and 943184 transitions. [2020-12-22 06:08:46,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:08:46,994 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-12-22 06:08:46,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:08:47,931 INFO L225 Difference]: With dead ends: 506256 [2020-12-22 06:08:47,931 INFO L226 Difference]: Without dead ends: 288309 [2020-12-22 06:08:48,143 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 06:08:48,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288309 states. [2020-12-22 06:08:58,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288309 to 287502. [2020-12-22 06:08:58,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287502 states. [2020-12-22 06:08:59,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287502 states to 287502 states and 531299 transitions. [2020-12-22 06:08:59,058 INFO L78 Accepts]: Start accepts. Automaton has 287502 states and 531299 transitions. Word has length 71 [2020-12-22 06:08:59,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:08:59,058 INFO L481 AbstractCegarLoop]: Abstraction has 287502 states and 531299 transitions. [2020-12-22 06:08:59,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:08:59,059 INFO L276 IsEmpty]: Start isEmpty. Operand 287502 states and 531299 transitions. [2020-12-22 06:08:59,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 06:08:59,064 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:08:59,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:08:59,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 06:08:59,064 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 06:08:59,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:08:59,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1890622738, now seen corresponding path program 1 times [2020-12-22 06:08:59,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:08:59,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279387196] [2020-12-22 06:08:59,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:08:59,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:08:59,142 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 06:08:59,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279387196] [2020-12-22 06:08:59,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:08:59,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:08:59,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812071885] [2020-12-22 06:08:59,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:08:59,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:08:59,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:08:59,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:08:59,144 INFO L87 Difference]: Start difference. First operand 287502 states and 531299 transitions. Second operand 5 states. [2020-12-22 06:09:18,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:09:18,172 INFO L93 Difference]: Finished difference Result 787252 states and 1452394 transitions. [2020-12-22 06:09:18,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:09:18,173 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-12-22 06:09:18,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:09:19,592 INFO L225 Difference]: With dead ends: 787252 [2020-12-22 06:09:19,593 INFO L226 Difference]: Without dead ends: 514600 [2020-12-22 06:09:19,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:09:20,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514600 states. [2020-12-22 06:09:33,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514600 to 287502. [2020-12-22 06:09:33,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287502 states. [2020-12-22 06:09:34,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287502 states to 287502 states and 523977 transitions. [2020-12-22 06:09:34,214 INFO L78 Accepts]: Start accepts. Automaton has 287502 states and 523977 transitions. Word has length 73 [2020-12-22 06:09:34,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:09:34,214 INFO L481 AbstractCegarLoop]: Abstraction has 287502 states and 523977 transitions. [2020-12-22 06:09:34,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:09:34,215 INFO L276 IsEmpty]: Start isEmpty. Operand 287502 states and 523977 transitions. [2020-12-22 06:09:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 06:09:34,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:09:34,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:09:34,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 06:09:34,230 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:09:34,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:09:34,231 INFO L82 PathProgramCache]: Analyzing trace with hash 578258781, now seen corresponding path program 1 times [2020-12-22 06:09:34,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:09:34,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752044771] [2020-12-22 06:09:34,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:09:34,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:09:34,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:09:34,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752044771] [2020-12-22 06:09:34,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:09:34,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:09:34,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114419296] [2020-12-22 06:09:34,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:09:34,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:09:34,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:09:34,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:09:34,326 INFO L87 Difference]: Start difference. First operand 287502 states and 523977 transitions. Second operand 3 states. [2020-12-22 06:09:54,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:09:54,699 INFO L93 Difference]: Finished difference Result 840874 states and 1532117 transitions. [2020-12-22 06:09:54,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:09:54,700 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 06:09:54,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:09:56,032 INFO L225 Difference]: With dead ends: 840874 [2020-12-22 06:09:56,032 INFO L226 Difference]: Without dead ends: 567931 [2020-12-22 06:09:56,333 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 06:09:56,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567931 states. [2020-12-22 06:10:18,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567931 to 567931. [2020-12-22 06:10:18,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567931 states.